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Android 学生信息管理系统_android。学生需管理的信息包含:学号、姓名、专业、身份证号、监护人、

作者：盐析白兔 | 2024-05-24 06:15:57

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android。学生需管理的信息包含:学号、姓名、专业、身份证号、监护人、

今天上课老师让利用ListView和数据库做一个学员信息管理系统。下面我就把自己做的代码复制下来，供大家参考。

首页的布局main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <RelativeLayout android:id="@+id/RelativeLayout"
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content">
        <Button android:id="@+id/bn_search_id" 
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" 
            android:text="搜索"
            android:gravity="center_vertical" />
        <Button android:gravity="center" 
            android:text="@string/myButton"
            android:id="@+id/btn_add_student" 
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" 
            android:layout_alignParentTop="true"
            android:layout_toRightOf="@+id/bn_search_id" 
            android:layout_toLeftOf="@+id/bn_select" />
        <Button  android:gravity="center_vertical"
            android:text="选择" 
            android:id="@+id/bn_select" 
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" 
            android:layout_alignParentTop="true"
            android:layout_alignParentRight="true"></Button>
    </RelativeLayout>
    <TextView 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="              ID            姓 名       年 龄         性 别        "
    />
    <ListView android:id="@android:id/list"
    android:layout_width="fill_parent" 
    android:layout_weight="1"
    android:layout_height="wrap_content"/>
    <LinearLayout 
        android:orientation="horizontal"
        android:id="@+id/showLiner"
        android:visibility="gone"    
         android:layout_width="fill_parent"
         android:layout_height="wrap_content">
         <Button 
         android:id="@+id/bn_delete"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:layout_weight="1"
         android:text="删除"
         android:enabled="false"
         />     
         <Button 
         android:id="@+id/bn_selectall"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:layout_weight="1"
         android:text="全选"
         />
         <Button 
         android:id="@+id/bn_canel"
        android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:layout_weight="1"
         android:text="取消"
         />   
         </LinearLayout>
        
</LinearLayout>

创建listView中显示学员信息的xml格式 student_list_item.xml

?
<?xml version= "1.0" encoding= "utf-8" ?>
<LinearLayout xmlns:android= "http://schemas.android.com/apk/res/android"
     android:orientation= "horizontal"
     android:layout_width= "fill_parent"
     android:layout_height= "wrap_content" >
     <ImageView android:layout_width= "fill_parent"
         android:layout_height= "wrap_content"
         android:layout_gravity= "center"
         android:layout_weight= "1"
         android:background= "@drawable/icon" />
     <TextView android:id= "@+id/tv_stu_id"
         android:layout_width= "fill_parent"
         android:layout_gravity= "center"
         android:layout_height= "wrap_content"
         android:layout_weight= "1" />
     <TextView android:id= "@+id/tv_stu_name"
         android:layout_width= "fill_parent"
         android:layout_gravity= "center"
         android:layout_height= "wrap_content"
         android:layout_weight= "1" />
         
     <TextView android:id= "@+id/tv_stu_age"
         android:layout_width= "fill_parent"
         android:layout_gravity= "center"
         android:layout_height= "wrap_content"
         android:layout_weight= "1" />
     <TextView android:id= "@+id/tv_stu_sex"
         android:layout_width= "fill_parent"
         android:layout_gravity= "center"
         android:layout_height= "wrap_content"
         android:layout_weight= "1" />
     
     <TextView android:id= "@+id/tv_stu_likes"
         android:layout_width= "fill_parent"
         android:layout_gravity= "center"
         android:layout_height= "wrap_content"
         android:layout_weight= "1"
         android:visibility= "gone" />
     <TextView android:id= "@+id/tv_stu_phone"
         android:layout_width= "fill_parent"
         android:layout_gravity= "center"
         android:layout_height= "wrap_content"
         android:layout_weight= "1"
         android:visibility= "gone" />
     <TextView android:id= "@+id/tv_stu_traindate"
         android:layout_width= "fill_parent"
         android:layout_height= "wrap_content"
         android:layout_gravity= "center"
         android:layout_weight= "1"
         android:visibility= "gone" />
     <TextView android:id= "@+id/tv_stu_modifyDateTime"
         android:layout_width= "fill_parent"
         android:layout_gravity= "center"
         android:layout_height= "wrap_content"
         android:layout_weight= "1"
         android:visibility= "gone" />
         
     <CheckBox
         android:id= "@+id/cb_box"
         android:layout_width= "fill_parent"
         android:layout_height= "wrap_content"
         android:layout_weight= "1"
         android:visibility= "gone"
         android:checked= "false"
         android:focusable= "false"
     />
</LinearLayout>

　　创建一个StudentListActivity做为主页显示学员信息以及进行一些操作。

package cn.yj3g.student.activity;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.util.Log;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.SimpleCursorAdapter;
import android.widget.Toast;
import cn.yj3g.student.dao.StudentDao;
import cn.yj3g.student.db.StudentDBHelper;
import cn.yj3g.student.entry.Student;
import cn.yj3g.student.entry.TableContanst;

public class StudentListActivity extends ListActivity implements
        OnClickListener, OnItemClickListener, OnItemLongClickListener {

    private static final String TAG = "TestSQLite";
    private Button addStudent;
    private Cursor cursor;
    private SimpleCursorAdapter adapter;
    private ListView listView;
    private List<Long> list;
    private RelativeLayout relativeLayout;
    private Button searchButton;
    private Button selectButton;
    private Button deleteButton;
    private Button selectAllButton;
    private Button canleButton;
    private LinearLayout layout;
    private StudentDao dao;
    private Student student;
    private Boolean isDeleteList = false;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Log.e(TAG, "onCreate");
        list = new ArrayList<Long>();
        student = new Student();
        dao = new StudentDao(new StudentDBHelper(this));
        addStudent = (Button) findViewById(R.id.btn_add_student);
        searchButton = (Button) findViewById(R.id.bn_search_id);
        selectButton = (Button) findViewById(R.id.bn_select);
        deleteButton = (Button) findViewById(R.id.bn_delete);
        selectAllButton = (Button) findViewById(R.id.bn_selectall);
        canleButton = (Button) findViewById(R.id.bn_canel);
        layout = (LinearLayout) findViewById(R.id.showLiner);
        relativeLayout=(RelativeLayout) findViewById(R.id.RelativeLayout);
        listView = getListView();

        // 为按键设置监听
        addStudent.setOnClickListener(this);
        searchButton.setOnClickListener(this);
        selectButton.setOnClickListener(this);
        deleteButton.setOnClickListener(this);
        canleButton.setOnClickListener(this);
        selectAllButton.setOnClickListener(this);
        listView.setOnItemClickListener(this);
        listView.setOnItemLongClickListener(this);
        listView.setOnCreateContextMenuListener(this);

    }

    @Override
    protected void onStart() {
        // 调用load()方法将数据库中的所有记录显示在当前页面
        super.onStart();
        load();

    }

    public void onClick(View v) {
        // 跳转到添加信息的界面
        if (v == addStudent) {
            startActivity(new Intent(this, AddStudentActivity.class));
        } else if (v == searchButton) {
            // 跳转到查询界面
            startActivity(new Intent(this, StudentSearch.class));
        } else if (v == selectButton) {
            // 跳转到选择界面
            isDeleteList = !isDeleteList;
            if (isDeleteList) {
                checkOrClearAllCheckboxs(true);
            } else {
                showOrHiddenCheckBoxs(false);
            }
        } else if (v == deleteButton) {
            // 删除数据
            if (list.size() > 0) {
                for (int i = 0; i < list.size(); i++) {
                    long id = list.get(i);
                    Log.e(TAG, "delete id=" + id);
                    int count = dao.deleteStudentById(id);
                }
                dao.closeDB();
                load();
            }
        } else if (v == canleButton) {
            // 点击取消，回到初始界面
            load();
            layout.setVisibility(View.GONE);
            isDeleteList = !isDeleteList;
        } else if (v == selectAllButton) {
            // 全选，如果当前全选按钮显示是全选，则在点击后变为取消全选，如果当前为取消全选，则在点击后变为全选
            selectAllMethods();
        }
    }
    // 创建菜单
    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.layout.menu, menu);
    }

    // 对菜单中的按钮添加响应时间
    @Override
    public boolean onContextItemSelected(MenuItem item) {
        int item_id = item.getItemId();
        student = (Student) listView.getTag();
        Log.v(TAG, "TestSQLite++++student+" + listView.getTag() + "");
        final long student_id = student.getId();
        Intent intent = new Intent();
        // Log.v(TAG, "TestSQLite+++++++id"+student_id);
        switch (item_id) {
        // 添加
        case R.id.add:
            startActivity(new Intent(this, AddStudentActivity.class));
            break;
        // 删除
        case R.id.delete:
            deleteStudentInformation(student_id);
            break;
        case R.id.look:
            // 查看学生信息
            // Log.v(TAG, "TestSQLite+++++++look"+student+"");
            intent.putExtra("student", student);
            intent.setClass(this, ShowStudentActivity.class);
            this.startActivity(intent);
            break;
        case R.id.write:
            // 修改学生信息
            intent.putExtra("student", student);
            intent.setClass(this, AddStudentActivity.class);
            this.startActivity(intent);
            break;
        default:
            break;
        }
        return super.onContextItemSelected(item);
    }

    // 创建一个按钮菜单
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        menu.add(1, 1, 1, "按入学日期排序");
        menu.add(1, 2, 1, "按姓名进行排序");
        menu.add(1, 5, 1, "按学号进行排序");
        menu.add(1, 3, 1, "模糊查找");
        menu.add(1, 4, 1, "退出");
        return super.onCreateOptionsMenu(menu);
    }

    // 对菜单中的按钮添加响应时间
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        switch (id) {
        // 排序
        case 1:
            cursor = dao.sortByTrainDate();
            load(cursor);
            break;

        // 排序
        case 2:
            cursor = dao.sortByName();
            load(cursor);
            break;
        // 查找
        case 3:
            startActivity(new Intent(this, StudentSearch.class));
            break;
        // 退出
        case 4:
            finish();
            break;
        case 5:
            cursor = dao.sortByID();
            load(cursor);
            break;
        default:
            break;
        }
        return super.onOptionsItemSelected(item);
    }

    // 长点击一条记录触发的时间
    @Override
    public boolean onItemLongClick(AdapterView<?> parent, View view,
            int position, long id) {
        Student student = (Student) dao.getStudentFromView(view, id);
        listView.setTag(student);
        return false;
    }

    // 点击一条记录是触发的事件
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
        if (!isDeleteList) {
            student = dao.getStudentFromView(view, id);
            // Log.e(TAG, "student*****" + dao.getStudentFromView(view, id));
            Intent intent = new Intent();
            intent.putExtra("student", student);
            intent.setClass(this, ShowStudentActivity.class);
            this.startActivity(intent);
        } else {
            CheckBox box = (CheckBox) view.findViewById(R.id.cb_box);
            box.setChecked(!box.isChecked());
            list.add(id);
            deleteButton.setEnabled(box.isChecked());
        }
    }

    // 自定义一个加载数据库中的全部记录到当前页面的无参方法
    public void load() {
        StudentDBHelper studentDBHelper = new StudentDBHelper(
                StudentListActivity.this);
        SQLiteDatabase database = studentDBHelper.getWritableDatabase();
        cursor = database.query(TableContanst.STUDENT_TABLE, null, null, null,
                null, null, TableContanst.StudentColumns.MODIFY_TIME + " desc");
        startManagingCursor(cursor);
        adapter = new SimpleCursorAdapter(this, R.layout.student_list_item,
                cursor, new String[] { TableContanst.StudentColumns.ID,
                        TableContanst.StudentColumns.NAME,
                        TableContanst.StudentColumns.AGE,
                        TableContanst.StudentColumns.SEX,
                        TableContanst.StudentColumns.LIKES,
                        TableContanst.StudentColumns.PHONE_NUMBER,
                        TableContanst.StudentColumns.TRAIN_DATE }, new int[] {
                        R.id.tv_stu_id, R.id.tv_stu_name, R.id.tv_stu_age,
                        R.id.tv_stu_sex, R.id.tv_stu_likes, R.id.tv_stu_phone,
                        R.id.tv_stu_traindate });
        listView.setAdapter(adapter);
    }

    // 自定义一个加载数据库中的全部记录到当前页面的有参方法
    public void load(Cursor cursor) {
        adapter = new SimpleCursorAdapter(this, R.layout.student_list_item,
                cursor, new String[] { TableContanst.StudentColumns.ID,
                        TableContanst.StudentColumns.NAME,
                        TableContanst.StudentColumns.AGE,
                        TableContanst.StudentColumns.SEX,
                        TableContanst.StudentColumns.LIKES,
                        TableContanst.StudentColumns.PHONE_NUMBER,
                        TableContanst.StudentColumns.TRAIN_DATE }, new int[] {
                        R.id.tv_stu_id, R.id.tv_stu_name, R.id.tv_stu_age,
                        R.id.tv_stu_sex, R.id.tv_stu_likes, R.id.tv_stu_phone,
                        R.id.tv_stu_traindate });
        listView.setAdapter(adapter);
    }

    // 全选或者取消全选
    private void checkOrClearAllCheckboxs(boolean b) {
        int childCount = listView.getChildCount();
        // Log.e(TAG, "list child size=" + childCount);
        for (int i = 0; i < childCount; i++) {
            View view = listView.getChildAt(i);
            if (view != null) {
                CheckBox box = (CheckBox) view.findViewById(R.id.cb_box);
                box.setChecked(!b);
            }
        }
        showOrHiddenCheckBoxs(true);
    }

    // 显示或者隐藏自定义菜单
    private void showOrHiddenCheckBoxs(boolean b) {
        int childCount = listView.getChildCount();
        // Log.e(TAG, "list child size=" + childCount);
        for (int i = 0; i < childCount; i++) {
            View view = listView.getChildAt(i);
            if (view != null) {
                CheckBox box = (CheckBox) view.findViewById(R.id.cb_box);
                int visible = b ? View.VISIBLE : View.GONE;
                box.setVisibility(visible);
                layout.setVisibility(visible);
                deleteButton.setEnabled(false);
            }
        }
    }

    // 自定义一个利用对话框形式进行数据的删除

    private void deleteStudentInformation(final long delete_id) {
        // 利用对话框的形式删除数据
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("学员信息删除")
                .setMessage("确定删除所选记录?")
                .setCancelable(false)
                .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        int raws = dao.deleteStudentById(delete_id);
                        layout.setVisibility(View.GONE);
                        isDeleteList = !isDeleteList;
                        load();
                        if (raws > 0) {
                            Toast.makeText(StudentListActivity.this, "删除成功!",
                                    Toast.LENGTH_LONG).show();
                        } else
                            Toast.makeText(StudentListActivity.this, "删除失败!",
                                    Toast.LENGTH_LONG).show();
                    }
                })
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        dialog.cancel();
                    }
                });
        AlertDialog alert = builder.create();
        alert.show();
    }

    // 点击全选事件时所触发的响应
    private void selectAllMethods() {
        // 全选，如果当前全选按钮显示是全选，则在点击后变为取消全选，如果当前为取消全选，则在点击后变为全选
        if (selectAllButton.getText().toString().equals("全选")) {
            int childCount = listView.getChildCount();
            for (int i = 0; i < childCount; i++) {
                View view = listView.getChildAt(i);
                if (view != null) {
                    CheckBox box = (CheckBox) view.findViewById(R.id.cb_box);
                    box.setChecked(true);
                    deleteButton.setEnabled(true);
                    selectAllButton.setText("取消全选");
                }
            }
        } else if (selectAllButton.getText().toString().equals("取消全选")) {
            checkOrClearAllCheckboxs(true);
            deleteButton.setEnabled(false);
            selectAllButton.setText("全选");
        }
    }
}

menu.xml文件

  
  
  1.  <menu xmlns:android="http://schemas.android.com/apk/res/android">

  2.  

  3.      <group android:checkableBehavior="single">

  4.          <item android:id="@+id/delete" android:title="删除学员信息" />

  5.          <item android:id="@+id/look" android:title="详细信息" />

  6.          <item android:id="@+id/add" android:title="添加学员信息" />

  7.          <item android:id="@+id/write" android:title="修改学员信息" />

  8.      </group>

  9.  </menu>

界面效果图如下：

删除界面：

在点击ListView中的一条Item时，老师要求显示出这个学生的详细信息，所以需要一个xml文件来显示这个信息。在这里我创建了一个student_info.xml文件

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3     android:orientation="vertical"
  4     android:layout_width="fill_parent"
  5     android:layout_height="fill_parent"
  6     android:padding="5dip"
  7     >
  8     <TextView android:id="@+id/id2_text_id"
  9         android:layout_width="80dip"
 10         android:layout_height="40dip"
 11         android:layout_marginRight="5dip"
 12         android:layout_marginTop="5dip"
 13         android:layout_marginBottom="5dip"
 14         android:textSize="16sp"
 15         android:gravity="left|center_vertical"
 16         android:text="学员ID："
 17     />
 18     
 19     <TextView android:id="@+id/tv_info_id"
 20         android:layout_width="fill_parent"
 21         android:layout_height="40dip"
 22         android:layout_toRightOf="@id/id2_text_id"
 23         android:layout_alignParentRight="true"
 24         android:layout_alignTop="@id/id2_text_id"
 25         android:gravity="left|center_vertical"
 26     />
 27     
 28     <TextView android:id="@+id/name2_text_id"
 29         android:layout_width="80dip"
 30         android:layout_height="40dip"
 31         android:layout_marginRight="5dip"
 32         android:layout_marginTop="5dip"
 33         android:layout_marginBottom="5dip"
 34         android:layout_below="@id/id2_text_id"
 35         android:layout_alignLeft="@id/id2_text_id"
 36         android:textSize="16sp"
 37         android:gravity="left|center_vertical"
 38         android:text="姓名："
 39     />
 40     
 41     <TextView android:id="@+id/tv_info_name"
 42         android:layout_width="fill_parent"
 43         android:layout_height="40dip"
 44         android:layout_toRightOf="@id/name2_text_id"
 45         android:layout_alignParentRight="true"
 46         android:layout_alignTop="@id/name2_text_id"
 47         android:gravity="left|center_vertical"
 48     />
 49     
 50     <TextView android:id="@+id/age2_text_id"
 51         android:layout_width="80dip"
 52         android:layout_height="40dip"
 53         android:gravity="left|center_vertical"
 54         android:layout_marginRight="5dip"
 55         android:layout_below="@id/name2_text_id"
 56         android:layout_marginBottom="5dip"
 57         android:textSize="16sp"
 58         android:text="年龄："
 59     />
 60     
 61     <TextView android:id="@+id/tv_info_age"
 62         android:layout_width="fill_parent"
 63         android:layout_height="40dip"
 64         android:layout_toRightOf="@id/age2_text_id"
 65         android:layout_alignParentRight="true"
 66         android:layout_alignTop="@id/age2_text_id"
 67         android:gravity="left|center_vertical"
 68     />
 69     
 70     <TextView android:id="@+id/sex2_text_id"
 71         android:layout_width="80dip"
 72         android:layout_height="40dip"
 73         android:gravity="left|center_vertical"
 74         android:layout_below="@id/age2_text_id"
 75         android:layout_alignLeft="@id/age2_text_id"
 76         android:layout_marginRight="5dip"
 77         android:layout_marginBottom="5dip"
 78         android:text="性别："
 79         android:textSize="16sp"
 80     />
 81     
 82     <TextView
 83         android:id="@+id/tv_info_sex"
 84         android:layout_width="fill_parent"
 85         android:layout_height="40dip"
 86         android:layout_toRightOf="@id/sex2_text_id"
 87         android:layout_alignParentRight="true"
 88         android:layout_alignTop="@id/sex2_text_id"
 89         android:gravity="left|center_vertical"
 90         />
 91     
 92     <TextView  android:id="@+id/like2_text_id"
 93         android:layout_width="80dip"
 94         android:layout_height="40dip"
 95         android:gravity="left|center_vertical"
 96         android:layout_below="@id/sex2_text_id"
 97         android:layout_alignLeft="@id/sex2_text_id"
 98         android:layout_marginRight="5dip"
 99         android:layout_marginBottom="5dip"
100         android:text="爱好："
101         android:textSize="16sp"
102     />
103     <TextView android:layout_height="40dip" 
104         android:id="@+id/tv_info_likes" 
105         android:layout_width="wrap_content" 
106         android:layout_toRightOf="@id/like2_text_id"
107         android:layout_below="@id/sex2_text_id"
108         android:layout_marginRight="52dip"
109         android:gravity="left|center_vertical"/>
110 
111     <TextView android:id="@+id/contact2_text_id"
112         android:layout_width="80dip"
113         android:layout_height="40dip"
114         android:gravity="center_vertical|left"
115         android:layout_marginRight="5dip"
116         android:layout_below="@id/like2_text_id"
117         android:layout_marginBottom="5dip"
118         android:textSize="16sp"
119         android:text="联系电话："
120     />
121     
122     <TextView android:id="@+id/tv_info_phone"
123         android:layout_width="fill_parent"
124         android:layout_height="40dip"
125         android:layout_toRightOf="@id/contact2_text_id"
126         android:layout_alignParentRight="true"
127         android:layout_alignTop="@id/contact2_text_id"
128         android:gravity="center_vertical|left"
129     />
130     
131     <TextView android:id="@+id/train2_time_text_id"
132         android:layout_width="80dip"
133         android:layout_height="40dip"
134         android:gravity="center_vertical|left"
135         android:layout_marginRight="5dip"
136         android:layout_below="@id/contact2_text_id"
137         android:layout_marginBottom="5dip"
138         android:textSize="16sp"
139         android:text="入学日期"
140     />
141     
142     <TextView android:id="@+id/tv_info_train_date"
143         android:layout_width="fill_parent"
144         android:layout_height="40dip"
145         android:layout_toRightOf="@id/train2_time_text_id"
146         android:layout_alignParentRight="true"
147         android:layout_alignTop="@id/train2_time_text_id"
148         android:gravity="center_vertical|left"
149     />
150     
151     <Button android:id="@+id/back_to_list_id" 
152         android:layout_width="fill_parent" 
153         android:layout_height="wrap_content" 
154         android:text="返回列表界面" 
155         android:layout_below="@id/train2_time_text_id" 
156         android:layout_alignParentLeft="true"
157         android:layout_alignParentRight="true"
158         android:onClick="goBack">
159     </Button>
160 </RelativeLayout>

当然我们需要一个Activity来显示这些信息，在这里我创建了一个ShowStudentActivity。

  
  
  1.  package cn.yj3g.student.activity;

  2.  

  3.  import android.app.Activity;

  4.  import android.content.Intent;

  5.  import android.os.Bundle;

  6.  import android.view.View;

  7.  import android.widget.TextView;

  8.  import cn.yj3g.student.entry.Student;

  9.  import cn.yj3g.student.entry.TableContanst;

  10.  

  11.  public class ShowStudentActivity extends Activity {

  12.  

  13.      @Override

  14.      public void onCreate(Bundle savedInstanceState) {

  15.          super.onCreate(savedInstanceState);

  16.          setContentView(R.layout.student_info);

  17.          Intent intent = getIntent();

  18.          Student student = (Student) intent.getSerializableExtra(TableContanst.STUDENT_TABLE);

  19.          ((TextView)findViewById(R.id.tv_info_id)).setText(student.getId()+"");

  20.          ((TextView)findViewById(R.id.tv_info_name)).setText(student.getName());

  21.          ((TextView)findViewById(R.id.tv_info_age)).setText(student.getAge()+"");

  22.          ((TextView)findViewById(R.id.tv_info_sex)).setText(student.getSex());

  23.          ((TextView)findViewById(R.id.tv_info_likes)).setText(student.getLike());

  24.          ((TextView)findViewById(R.id.tv_info_train_date)).setText(student.getTrainDate());

  25.          ((TextView)findViewById(R.id.tv_info_phone)).setText(student.getPhoneNumber());

  26.      }

  27.      

  28.      public void goBack(View view) {

  29.          finish();

  30.      }

  31.  }

界面效果如下：

最最重要的环节来了，我们做这个系统主要是为了管理学员，所以增加和修改学员信息是必不可少的，因此需要一个Activity来专门提供添加和修改学员信息。在这里还有一件重要的事情要做，那就是要设计添加和修改学员的界面，在这里可用用相对布局做比较简单。我在这里创建了一个AddStudentActivity来添加和修改学员信息，下面附上相关代码：

add_student.xml

  1 <?xml version="1.0" encoding="utf-8"?>
  2 
  3 <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"  
  4     android:layout_width="fill_parent"  
  5     android:layout_height="fill_parent"  
  6     android:fillViewport="true"  
  7     android:scrollbarStyle="outsideInset" > 
  8 <RelativeLayout 
  9     android:orientation="vertical"
 10     android:layout_width="fill_parent"
 11     android:layout_height="fill_parent"
 12     android:padding="5dip"
 13     >
 14     
 15     <TextView android:id="@+id/tv_stu_text_id"
 16         android:layout_width="80dip"
 17         android:layout_height="40dip"
 18         android:gravity="center_vertical|right"
 19         android:layout_marginRight="5dip"
 20         android:layout_marginTop="5dip"
 21         android:layout_marginBottom="5dip"
 22         android:textSize="16sp"
 23         android:text="学员ID："
 24     />
 25     
 26     <TextView android:id="@+id/tv_stu_id"
 27         android:layout_width="fill_parent"
 28         android:layout_height="40dip"
 29         android:text="未分配ID"
 30         android:layout_toRightOf="@id/tv_stu_text_id"
 31         android:layout_alignParentRight="true"
 32         android:layout_alignTop="@id/tv_stu_text_id"
 33         android:gravity="center"
 34         android:background="#ffffff"
 35         android:textColor="#000000"
 36         android:textSize="16sp"
 37     />
 38     
 39     <TextView android:id="@+id/tv_name_text"
 40         android:layout_width="80dip"
 41         android:layout_height="40dip"
 42         android:gravity="center_vertical|right"
 43         android:layout_marginRight="5dip"
 44         android:layout_below="@id/tv_stu_text_id"
 45         android:layout_alignLeft="@id/tv_stu_text_id"
 46         android:layout_marginBottom="5dip"
 47         android:textSize="16sp"
 48         android:text="姓名："
 49     />
 50     
 51     <EditText android:id="@+id/et_name"
 52         android:layout_width="fill_parent"
 53         android:layout_height="40dip"
 54         android:layout_toRightOf="@id/tv_name_text"
 55         android:layout_alignParentRight="true"
 56         android:layout_alignTop="@id/tv_name_text"
 57         android:hint="请输入姓名"
 58         android:inputType="textPersonName"
 59         android:paddingLeft="20dip"/>
 60     
 61     <TextView android:id="@+id/tv_age_text"
 62         android:layout_width="80dip"
 63         android:layout_height="40dip"
 64         android:gravity="center_vertical|right"
 65         android:layout_marginRight="5dip"
 66         android:layout_below="@id/tv_name_text"
 67         android:layout_marginBottom="5dip"
 68         android:textSize="16sp"
 69         android:text="年龄："
 70     />
 71     
 72     <EditText android:id="@+id/et_age"
 73         android:layout_width="fill_parent"
 74         android:layout_height="40dip"
 75         android:layout_toRightOf="@id/tv_age_text"
 76         android:layout_alignParentRight="true"
 77         android:layout_alignTop="@id/tv_age_text"
 78         android:hint="请输入年龄"
 79         android:paddingLeft="20dip"
 80         android:maxLength="3"
 81         android:inputType="number"
 82     />
 83     
 84     <TextView android:id="@+id/tv_sex_text"
 85         android:layout_width="80dip"
 86         android:layout_height="40dip"
 87         android:gravity="center_vertical|right"
 88         android:layout_below="@id/tv_age_text"
 89         android:layout_alignLeft="@id/tv_age_text"
 90         android:layout_marginRight="5dip"
 91         android:layout_marginBottom="5dip"
 92         android:text="性别："
 93         android:textSize="16sp"
 94     />
 95     
 96     <RadioGroup
 97         android:id="@+id/rg_sex"
 98         android:layout_width="fill_parent"
 99         android:layout_height="40dip"
100         android:orientation="horizontal"
101         android:layout_toRightOf="@id/tv_sex_text"
102         android:layout_alignParentRight="true"
103         android:layout_alignTop="@id/tv_sex_text"
104         >
105         <RadioButton
106           android:id="@+id/rb_sex_male"
107           android:layout_width="wrap_content"
108           android:layout_height="wrap_content"
109           android:layout_weight="1"
110           android:text="男"
111           android:textSize="16sp"
112         />
113         <RadioButton android:layout_width="wrap_content" 
114         android:layout_height="wrap_content" 
115         android:text="女" 
116         android:id="@+id/rb_sex_female"
117         android:layout_weight="1"
118         android:textSize="16sp">
119         </RadioButton>
120     </RadioGroup>
121     
122     <TextView  android:id="@+id/tv_likes_text"
123         android:layout_width="80dip"
124         android:layout_height="40dip"
125         android:gravity="center_vertical|right"
126         android:layout_below="@id/rg_sex"
127         android:layout_alignLeft="@id/tv_sex_text"
128         android:layout_marginRight="5dip"
129         android:layout_marginBottom="5dip"
130         android:text="爱好："
131         android:textSize="16sp"
132     />
133     <CheckBox
134     android:id="@+id/box1"
135             android:layout_width="wrap_content" android:layout_height="wrap_content"
136             android:layout_toRightOf="@id/tv_likes_text"
137             android:layout_below="@+id/rg_sex"
138             android:layout_alignLeft="@+id/group1"
139             android:text="@string/box1"
140     ></CheckBox>
141     <CheckBox
142     android:id="@+id/box2"
143             android:layout_width="wrap_content" android:layout_height="wrap_content"
144             android:layout_toRightOf="@+id/box1"
145             android:layout_below="@+id/rg_sex"
146             android:layout_alignTop="@+id/box1"
147             android:text="@string/box2"
148     ></CheckBox>
149     <CheckBox
150     android:id="@+id/box3"
151             android:layout_width="wrap_content" android:layout_height="wrap_content"
152             android:layout_toRightOf="@+id/box2"
153             android:layout_below="@+id/rg_sex"
154             android:layout_alignTop="@+id/box2"
155             android:text="@string/box3"
156     ></CheckBox>
157     
158     <TextView android:id="@+id/tv_phone_text"
159         android:layout_width="80dip"
160         android:layout_height="40dip"
161         android:gravity="center_vertical|right"
162         android:layout_marginRight="5dip"
163         android:layout_below="@id/tv_likes_text"
164         android:layout_marginBottom="5dip"
165         android:textSize="16sp"
166         android:text="联系电话："
167     />
168     
169     <EditText android:id="@+id/et_phone"
170         android:layout_width="fill_parent"
171         android:layout_height="40dip"
172         android:layout_toRightOf="@id/tv_phone_text"
173         android:layout_alignParentRight="true"
174         android:layout_alignTop="@id/tv_phone_text"
175         android:hint="请输入手机号"
176         android:paddingLeft="20dip"
177         android:inputType="phone"
178         android:maxLength="11"
179     />
180     
181     <TextView android:id="@+id/tv_traindate_text"
182         android:layout_width="80dip"
183         android:layout_height="40dip"
184         android:gravity="center_vertical|right"
185         android:layout_marginRight="5dip"
186         android:layout_below="@id/tv_phone_text"
187         android:layout_marginBottom="5dip"
188         android:textSize="16sp"
189         android:text="入学日期"
190         
191     />
192     
193     <EditText android:id="@+id/et_traindate"
194         android:layout_width="fill_parent"
195         android:layout_height="40dip"
196         android:layout_toRightOf="@id/tv_traindate_text"
197         android:layout_alignParentRight="true"
198         android:layout_alignTop="@id/tv_traindate_text"
199         android:hint="点击选择日期"
200         android:inputType="date"
201         android:paddingLeft="20dip"
202         android:focusable="false"
203     />
204     <Button android:id="@+id/btn_save" 
205         android:layout_width="wrap_content" 
206         android:layout_height="wrap_content" 
207         android:text="保存" 
208         android:layout_below="@id/tv_traindate_text" 
209         android:layout_alignRight="@id/rg_sex">
210     </Button>
211     <Button android:id="@+id/btn_clear" 
212         android:layout_width="wrap_content" 
213         android:layout_height="wrap_content" 
214         android:text="重置" 
215         android:layout_below="@id/tv_traindate_text" 
216         android:layout_toLeftOf="@id/btn_save"
217         android:layout_marginRight="10dip">
218     </Button>
219 </RelativeLayout>
220 </ScrollView>

AddStudentActivity代码：

  
  
  1.  package cn.yj3g.student.activity;

  2.  

  3.  import java.io.Serializable;

  4.  import java.text.SimpleDateFormat;

  5.  import java.util.Calendar;

  6.  import java.util.Date;

  7.  import java.util.HashSet;

  8.  

  9.  import android.app.Activity;

  10.  import android.app.DatePickerDialog;

  11.  import android.app.Dialog;

  12.  import android.content.ContentValues;

  13.  import android.content.Intent;

  14.  import android.database.sqlite.SQLiteDatabase;

  15.  import android.os.Bundle;

  16.  import android.view.View;

  17.  import android.view.View.OnClickListener;

  18.  import android.widget.Button;

  19.  import android.widget.CheckBox;

  20.  import android.widget.CompoundButton;

  21.  import android.widget.CompoundButton.OnCheckedChangeListener;

  22.  import android.widget.DatePicker;

  23.  import android.widget.EditText;

  24.  import android.widget.RadioButton;

  25.  import android.widget.RadioGroup;

  26.  import android.widget.TextView;

  27.  import android.widget.Toast;

  28.  import cn.yj3g.student.dao.StudentDao;

  29.  import cn.yj3g.student.db.StudentDBHelper;

  30.  import cn.yj3g.student.entry.Student;

  31.  import cn.yj3g.student.entry.TableContanst;

  32.  

  33.  public class AddStudentActivity extends Activity implements OnClickListener {

  34.  

  35.      private static final String TAG = "AddStudentActivity";

  36.      private final static int DATE_DIALOG = 1;

  37.      private static final int DATE_PICKER_ID = 1;

  38.      private TextView idText;

  39.      private EditText nameText;

  40.      private EditText ageText;

  41.      private EditText phoneText;

  42.      private EditText dataText;

  43.      private RadioGroup group;

  44.      private RadioButton button1;

  45.      private RadioButton button2;

  46.      private CheckBox box1;

  47.      private CheckBox box2;

  48.      private CheckBox box3;

  49.      private Button restoreButton;

  50.      private String sex;

  51.      private Button resetButton;

  52.      private Long student_id;

  53.  

  54.      private StudentDao dao;

  55.      private boolean isAdd = true;

  56.  

  57.      @Override

  58.      public void onCreate(Bundle savedInstanceState) {

  59.          super.onCreate(savedInstanceState);

  60.          setContentView(R.layout.add_student);

  61.          idText = (TextView) findViewById(R.id.tv_stu_id);

  62.          nameText = (EditText) findViewById(R.id.et_name);

  63.          ageText = (EditText) findViewById(R.id.et_age);

  64.          button1 = (RadioButton) findViewById(R.id.rb_sex_female);

  65.          button2 = (RadioButton) findViewById(R.id.rb_sex_male);

  66.          phoneText = (EditText) findViewById(R.id.et_phone);

  67.          dataText = (EditText) findViewById(R.id.et_traindate);

  68.          group = (RadioGroup) findViewById(R.id.rg_sex);

  69.          box1 = (CheckBox) findViewById(R.id.box1);

  70.          box2 = (CheckBox) findViewById(R.id.box2);

  71.          box3 = (CheckBox) findViewById(R.id.box3);

  72.  

  73.          restoreButton = (Button) findViewById(R.id.btn_save);

  74.          resetButton = (Button) findViewById(R.id.btn_clear);

  75.          dao = new StudentDao(new StudentDBHelper(this));

  76.  

  77.          // 设置监听

  78.          restoreButton.setOnClickListener(this);

  79.          resetButton.setOnClickListener(this);

  80.          dataText.setOnClickListener(this);

  81.          checkIsAddStudent();

  82.      }

  83.  

  84.      /**

  85.       * 检查此时Activity是否用于添加学员信息

  86.       */

  87.      private void checkIsAddStudent() {

  88.          Intent intent = getIntent();

  89.          Serializable serial = intent

  90.                  .getSerializableExtra(TableContanst.STUDENT_TABLE);

  91.          if (serial == null) {

  92.              isAdd = true;

  93.              dataText.setText(getCurrentDate());

  94.          } else {

  95.              isAdd = false;

  96.              Student s = (Student) serial;

  97.              showEditUI(s);

  98.  

  99.          }

  100.      }

  101.  

  102.      /**

  103.       * 显示学员信息更新的UI

  104.       */

  105.      private void showEditUI(Student student) {

  106.          // 先将Student携带的数据还原到student的每一个属性中去

  107.          student_id = student.getId();

  108.          String name = student.getName();

  109.          int age = student.getAge();

  110.          String phone = student.getPhoneNumber();

  111.          String data = student.getTrainDate();

  112.          String like = student.getLike();

  113.          String sex = student.getSex();

  114.          if (sex.toString().equals("男")) {

  115.              button2.setChecked(true);

  116.          } else if (sex.toString().equals("女")) {

  117.              button1.setChecked(true);

  118.          }

  119.          if (like != null && !"".equals(like)) {

  120.              if (box1.getText().toString().indexOf(like) >= 0) {

  121.                  box1.setChecked(true);

  122.              }

  123.              if (box2.getText().toString().indexOf(like) >= 0) {

  124.                  box2.setChecked(true);

  125.              }

  126.              if (box3.getText().toString().indexOf(like) >= 0) {

  127.                  box3.setChecked(true);

  128.              }

  129.          }

  130.          // 还原数据

  131.          idText.setText(student_id + "");

  132.          nameText.setText(name + "");

  133.          ageText.setText(age + "");

  134.          phoneText.setText(phone + "");

  135.          dataText.setText(data + "");

  136.          setTitle("学员信息更新");

  137.          restoreButton.setText("更新");

  138.      }

  139.  

  140.      public void onClick(View v) {

  141.          // 收集数据

  142.          if (v == restoreButton) {

  143.              if (!checkUIInput()) {// 界面输入验证

  144.                  return;

  145.              }

  146.              Student student = getStudentFromUI();

  147.              if (isAdd) {

  148.                  long id = dao.addStudent(student);

  149.                  dao.closeDB();

  150.                  if (id > 0) {

  151.                      Toast.makeText(this, "保存成功， ID=" + id, 0).show();

  152.                      finish();

  153.                  } else {

  154.                      Toast.makeText(this, "保存失败，请重新输入！", 0).show();

  155.                  }

  156.              } else if (!isAdd) {

  157.                  long id = dao.addStudent(student);

  158.                  dao.closeDB();

  159.                  if (id > 0) {

  160.                      Toast.makeText(this, "更新成功", 0).show();

  161.                      finish();

  162.                  } else {

  163.                      Toast.makeText(this, "更新失败，请重新输入！", 0).show();

  164.                  }

  165.              }

  166.  

  167.          } else if (v == resetButton) {

  168.              clearUIData();

  169.          } else if (v == dataText) {

  170.              showDialog(DATE_PICKER_ID);

  171.          }

  172.      }

  173.  

  174.      /**

  175.       * 清空界面的数据

  176.       */

  177.      private void clearUIData() {

  178.          nameText.setText("");

  179.          ageText.setText("");

  180.          phoneText.setText("");

  181.          dataText.setText("");

  182.          box1.setChecked(false);

  183.          box2.setChecked(false);

  184.          group.clearCheck();

  185.      }

  186.  

  187.      /**

  188.       * 收集界面输入的数据，并将封装成Student对象

  189.       */

  190.      private Student getStudentFromUI() {

  191.          String name = nameText.getText().toString();

  192.          int age = Integer.parseInt(ageText.getText().toString());

  193.          String sex = ((RadioButton) findViewById(group

  194.                  .getCheckedRadioButtonId())).getText().toString();

  195.          String likes = "";

  196.          if (box1.isChecked()) { // basketball, football football

  197.              likes += box1.getText();

  198.          }

  199.          if (box2.isChecked()) {

  200.              if (likes.equals("")) {

  201.                  likes += box2.getText();

  202.              } else {

  203.                  likes += "," + box2.getText();

  204.              }

  205.              if (likes.equals("")) {

  206.                  likes += box3.getText();

  207.              } else {

  208.                  likes += "," + box3.getText();

  209.              }

  210.          }

  211.          String trainDate = dataText.getText().toString();

  212.          String phoneNumber = phoneText.getText().toString();

  213.          String modifyDateTime = getCurrentDateTime();

  214.          Student s=new Student(name, age, sex, likes, phoneNumber, trainDate,

  215.                  modifyDateTime);

  216.          if (!isAdd) {

  217.              s.setId(Integer.parseInt(idText.getText().toString()));

  218.              dao.deleteStudentById(student_id);

  219.          }

  220.          return s;

  221.      }

  222.  

  223.      /**

  224.       * 得到当前的日期时间

  225.       */

  226.      private String getCurrentDateTime() {

  227.          SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");

  228.          return format.format(new Date());

  229.      }

  230.      /**

  231.       * 得到当前的日期

  232.       */

  233.      private String getCurrentDate() {

  234.          SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");

  235.          return format.format(new Date());

  236.      }

  237.      /**

  238.       * 验证用户是否按要求输入了数据

  239.       */

  240.      private boolean checkUIInput() { // name, age, sex

  241.          String name = nameText.getText().toString();

  242.          String age = ageText.getText().toString();

  243.          int id = group.getCheckedRadioButtonId();

  244.          String message = null;

  245.          View invadView = null;

  246.          if (name.trim().length() == 0) {

  247.              message = "请输入姓名！";

  248.              invadView = nameText;

  249.          } else if (age.trim().length() == 0) {

  250.              message = "请输入年龄！";

  251.              invadView = ageText;

  252.          } else if (id == -1) {

  253.              message = "请选择性别！";

  254.          }

  255.          if (message != null) {

  256.              Toast.makeText(this, message, 0).show();

  257.              if (invadView != null)

  258.                  invadView.requestFocus();

  259.              return false;

  260.          }

  261.          return true;

  262.      }

  263.  

  264.      private DatePickerDialog.OnDateSetListener onDateSetListener = new DatePickerDialog.OnDateSetListener() {

  265.          @Override

  266.          public void onDateSet(DatePicker view, int year, int monthOfYear,

  267.                  int dayOfMonth) {

  268.              dataText.setText(year + "-" + (monthOfYear + 1) + "-" + dayOfMonth);

  269.          }

  270.      };

  271.  

  272.      @Override

  273.      protected Dialog onCreateDialog(int id) {

  274.          switch (id) {

  275.          case DATE_PICKER_ID:

  276.              return new DatePickerDialog(this, onDateSetListener, 2011, 8, 14);

  277.          }

  278.          return null;

  279.      }

  280.  }

界面效果如下：

修改界面：

在这里我还做了一个额外的功能就是模糊查找，有想法的可以参考下。

StudentSearch代码：

package cn.yj3g.student.activity;

import cn.yj3g.student.dao.StudentDao;
import cn.yj3g.student.db.StudentDBHelper;
import cn.yj3g.student.entry.TableContanst;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.Toast;

public class StudentSearch extends Activity implements OnClickListener {
    private EditText nameText;
    private Button button;
    private Button reButton;
    private Cursor cursor;
    private SimpleCursorAdapter adapter;
    private ListView listView;
    private StudentDao dao;
    private Button returnButton;
    private LinearLayout layout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.search);
        nameText = (EditText) findViewById(R.id.et_srarch);
        layout=(LinearLayout) findViewById(R.id.linersearch);
        button = (Button) findViewById(R.id.bn_sure_search);
        reButton = (Button) findViewById(R.id.bn_return);
        listView = (ListView) findViewById(R.id.searchListView);
        returnButton = (Button) findViewById(R.id.return_id);
        dao = new StudentDao(new StudentDBHelper(this));
        
        
        reButton.setOnClickListener(this);
        returnButton.setOnClickListener(this);
        button.setOnClickListener(this);    
    }

    @Override
    public void onClick(View v) {
        if (v == button) {
            reButton.setVisibility(View.GONE);    
            button.setVisibility(View.GONE);
            nameText.setVisibility(View.GONE);
            layout.setVisibility(View.VISIBLE);
            String name = nameText.getText().toString();
            cursor = dao.findStudent(name);
            if (!cursor.moveToFirst()) {
                Toast.makeText(this, "没有所查学员信息！", Toast.LENGTH_SHORT).show();
            } else
                //如果有所查询的信息，则将查询结果显示出来
                adapter = new SimpleCursorAdapter(this, R.layout.find_student_list_item,
                        cursor, new String[] { TableContanst.StudentColumns.ID,
                                TableContanst.StudentColumns.NAME,
                                TableContanst.StudentColumns.AGE,
                                TableContanst.StudentColumns.SEX,
                                TableContanst.StudentColumns.LIKES,
                                TableContanst.StudentColumns.PHONE_NUMBER,
                                TableContanst.StudentColumns.TRAIN_DATE },
                        new int[] { R.id.tv_stu_id, R.id.tv_stu_name,
                                R.id.tv_stu_age, R.id.tv_stu_sex,
                                R.id.tv_stu_likes, R.id.tv_stu_phone,
                                R.id.tv_stu_traindate });
            listView.setAdapter(adapter);
        }else if(v==reButton|v==returnButton){
            finish();
        }
    }
}

search.xml

  
  
  1.  <?xml version="1.0" encoding="utf-8"?>

  2.  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

  3.      android:orientation="vertical"

  4.      android:layout_width="fill_parent" 

  5.      android:layout_height="fill_parent" >

  6.      <EditText 

  7.          android:id="@+id/et_srarch"

  8.          android:layout_width="fill_parent" 

  9.          android:layout_height="wrap_content"

  10.          android:hint="请输入学员姓名"

  11.          android:inputType="textPersonName"

  12.      />

  13.      <Button 

  14.          android:id="@+id/bn_sure_search"

  15.          android:gravity="center"

  16.          android:layout_width="fill_parent" 

  17.          android:layout_height="wrap_content"

  18.          android:text="确定"

  19.          />

  20.          <Button 

  21.          android:id="@+id/bn_return"

  22.          android:gravity="center"

  23.          android:layout_width="fill_parent" 

  24.          android:layout_height="wrap_content"

  25.          android:text="返回"

  26.          />

  27.          

  28.  <LinearLayout android:id="@+id/linersearch"

  29.                  android:orientation="vertical"

  30.                  android:visibility="gone"

  31.                  android:layout_width="fill_parent" 

  32.                  android:layout_height="wrap_content">

  33.      <ListView

  34.      android:id="@+id/searchListView"

  35.      android:layout_weight="1"

  36.      android:layout_width="fill_parent"

  37.      android:layout_height="wrap_content"/>

  38.      <Button 

  39.      android:id="@+id/return_id"

  40.      android:layout_width="fill_parent"

  41.      android:layout_height="wrap_content"

  42.      android:text="返回"

  43.      />                

  44.  </LinearLayout>

  45.  </LinearLayout>

find_student_list_item.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="horizontal" android:layout_width="fill_parent"
 4     android:layout_height="wrap_content">
 5     <ImageView android:layout_width="fill_parent"
 6         android:layout_height="wrap_content" android:layout_weight="1"
 7         android:background="@drawable/icon" />
 8         <TextView android:id="@+id/tv_stu_id" android:layout_width="fill_parent"
 9         android:layout_height="wrap_content" android:layout_weight="1" />
10     <TextView android:id="@+id/tv_stu_name" android:layout_width="fill_parent"
11         android:layout_height="wrap_content" android:layout_weight="1" />
12     <TextView android:id="@+id/tv_stu_age" android:layout_width="fill_parent"
13         android:layout_height="wrap_content" android:layout_weight="1" />
14     <TextView android:id="@+id/tv_stu_sex" android:layout_width="fill_parent"
15         android:layout_height="wrap_content" android:layout_weight="1" />
16     <TextView android:id="@+id/tv_stu_likes" android:layout_width="fill_parent"
17         android:layout_height="wrap_content" android:layout_weight="1" />
18     <TextView android:id="@+id/tv_stu_phone"
19         android:layout_width="fill_parent" android:layout_height="wrap_content"
20         android:layout_weight="1" />
21     <TextView android:id="@+id/tv_stu_traindate" android:layout_width="fill_parent"
22         android:layout_height="wrap_content" android:layout_weight="1" />
23 
24 </LinearLayout>

界面效果如下：

查询结果界面：

在这里还牵扯到了一些常量和数据库的连接以及增删改查等操作，我用我们老师的方法将他们分别放在不同的包里。下面附上代码：

StudentDao类

  
  
  1.  package cn.yj3g.student.dao;

  2.  

  3.  import java.util.ArrayList;

  4.  import java.util.HashMap;

  5.  import java.util.List;

  6.  import java.util.Map;

  7.  import android.content.ContentValues;

  8.  import android.database.Cursor;

  9.  import android.database.sqlite.SQLiteDatabase;

  10.  import android.view.View;

  11.  import android.widget.SimpleCursorAdapter;

  12.  import android.widget.TextView;

  13.  import cn.yj3g.student.activity.R;

  14.  import cn.yj3g.student.db.StudentDBHelper;

  15.  import cn.yj3g.student.entry.Student;

  16.  import cn.yj3g.student.entry.TableContanst;

  17.  

  18.  public class StudentDao {

  19.  

  20.      private StudentDBHelper dbHelper;

  21.      private Cursor cursor;

  22.      public StudentDao(StudentDBHelper dbHelper) {

  23.          this.dbHelper = dbHelper;

  24.      }

  25.      // 添加一个Student对象数据到数据库表

  26.      public long addStudent(Student s) {

  27.  

  28.          ContentValues values = new ContentValues();

  29.          values.put(TableContanst.StudentColumns.NAME, s.getName());

  30.          values.put(TableContanst.StudentColumns.AGE, s.getAge());

  31.          values.put(TableContanst.StudentColumns.SEX, s.getSex());

  32.          values.put(TableContanst.StudentColumns.LIKES, s.getLike());

  33.          values.put(TableContanst.StudentColumns.PHONE_NUMBER, s.getPhoneNumber());

  34.          values.put(TableContanst.StudentColumns.TRAIN_DATE, s.getTrainDate());

  35.          values.put(TableContanst.StudentColumns.MODIFY_TIME, s.getModifyDateTime());

  36.          return dbHelper.getWritableDatabase().insert(TableContanst.STUDENT_TABLE, null, values);

  37.  

  38.      }

  39.  

  40.      // 删除一个id所对应的数据库表student的记录

  41.      public int deleteStudentById(long id) {

  42.  

  43.          return dbHelper.getWritableDatabase().delete(TableContanst.STUDENT_TABLE,

  44.                  TableContanst.StudentColumns.ID + "=?", new String[] { id + "" });

  45.      }

  46.  

  47.      // 更新一个id所对应数据库表student的记录

  48.      public int updateStudent(Student s) {

  49.  

  50.          ContentValues values = new ContentValues();

  51.          values.put(TableContanst.StudentColumns.NAME, s.getName());

  52.          values.put(TableContanst.StudentColumns.AGE, s.getAge());

  53.          values.put(TableContanst.StudentColumns.SEX, s.getSex());

  54.          values.put(TableContanst.StudentColumns.LIKES, s.getLike());

  55.          values.put(TableContanst.StudentColumns.PHONE_NUMBER, s.getPhoneNumber());

  56.          values.put(TableContanst.StudentColumns.TRAIN_DATE, s.getTrainDate());

  57.          values.put(TableContanst.StudentColumns.MODIFY_TIME, s.getModifyDateTime());

  58.          return dbHelper.getWritableDatabase().update(TableContanst.STUDENT_TABLE, values,

  59.                  TableContanst.StudentColumns.ID + "=?", new String[] { s.getId() + "" });

  60.  

  61.      }

  62.  

  63.      // 查询所有的记录

  64.      public List<Map<String,Object>> getAllStudents() { //modify_time desc

  65.          

  66.          List<Map<String, Object>> data = new ArrayList<Map<String,Object>>();

  67.          Cursor cursor = dbHelper.getWritableDatabase().query(TableContanst.STUDENT_TABLE, null, null, null,

  68.                  null, null, TableContanst.StudentColumns.MODIFY_TIME+" desc");

  69.          while(cursor.moveToNext()) {

  70.              Map<String, Object> map = new HashMap<String, Object>(8);

  71.              long id = cursor.getInt(cursor.getColumnIndex(TableContanst.StudentColumns.ID));

  72.              map.put(TableContanst.StudentColumns.ID, id);

  73.              String name = cursor.getString(cursor.getColumnIndex(TableContanst.StudentColumns.NAME));

  74.              map.put(TableContanst.StudentColumns.NAME, name);

  75.              int age = cursor.getInt(cursor.getColumnIndex(TableContanst.StudentColumns.AGE));

  76.              map.put(TableContanst.StudentColumns.AGE, age);

  77.              String sex = cursor.getString(cursor.getColumnIndex(TableContanst.StudentColumns.SEX));

  78.              map.put(TableContanst.StudentColumns.SEX, sex);

  79.              String likes = cursor.getString(cursor.getColumnIndex(TableContanst.StudentColumns.LIKES));

  80.              map.put(TableContanst.StudentColumns.LIKES, likes);

  81.              String phone_number = cursor.getString(cursor.getColumnIndex(TableContanst.StudentColumns.PHONE_NUMBER));

  82.              map.put(TableContanst.StudentColumns.PHONE_NUMBER, phone_number);

  83.              String train_date = cursor.getString(cursor.getColumnIndex(TableContanst.StudentColumns.TRAIN_DATE));

  84.              map.put(TableContanst.StudentColumns.TRAIN_DATE, train_date);

  85.              String modify_time = cursor.getString(cursor.getColumnIndex(TableContanst.StudentColumns.MODIFY_TIME));

  86.              map.put(TableContanst.StudentColumns.MODIFY_TIME, modify_time);

  87.              data.add(map);

  88.          }

  89.          return data;

  90.      }

  91.      //模糊查询一条记录

  92.      public Cursor findStudent(String name){

  93.      

  94.          Cursor cursor = dbHelper.getWritableDatabase().query(TableContanst.STUDENT_TABLE,  null, "name like ?",

  95.                  new String[] { "%" + name + "%" }, null, null, null,null);

  96.      return cursor;

  97.      }

  98.      //按姓名进行排序

  99.      public Cursor sortByName(){

  100.          Cursor cursor = dbHelper.getWritableDatabase().query(TableContanst.STUDENT_TABLE,  null,null,

  101.                  null, null, null,TableContanst.StudentColumns.NAME);

  102.      return cursor;

  103.      }

  104.      //按入学日期进行排序

  105.      public Cursor sortByTrainDate(){

  106.          Cursor cursor = dbHelper.getWritableDatabase().query(TableContanst.STUDENT_TABLE,  null,null,

  107.                  null, null, null,TableContanst.StudentColumns.TRAIN_DATE);

  108.      return cursor;

  109.      }

  110.      //按学号进行排序

  111.      public Cursor sortByID(){

  112.          Cursor cursor = dbHelper.getWritableDatabase().query(TableContanst.STUDENT_TABLE,  null,null,

  113.                  null, null, null,TableContanst.StudentColumns.ID);

  114.      return cursor;

  115.      }

  116.      public void closeDB() {

  117.          dbHelper.close();

  118.      }

  119.      //自定义的方法通过View和Id得到一个student对象

  120.      public Student getStudentFromView(View view, long id) {

  121.          TextView nameView = (TextView) view.findViewById(R.id.tv_stu_name);

  122.          TextView ageView = (TextView) view.findViewById(R.id.tv_stu_age);

  123.          TextView sexView = (TextView) view.findViewById(R.id.tv_stu_sex);

  124.          TextView likeView = (TextView) view.findViewById(R.id.tv_stu_likes);

  125.          TextView phoneView = (TextView) view.findViewById(R.id.tv_stu_phone);

  126.          TextView dataView = (TextView) view.findViewById(R.id.tv_stu_traindate);

  127.          String name = nameView.getText().toString();

  128.          int age = Integer.parseInt(ageView.getText().toString());

  129.          String sex = sexView.getText().toString();

  130.          String like = likeView.getText().toString();

  131.          String phone = phoneView.getText().toString();

  132.          String data = dataView.getText().toString();

  133.          Student student = new Student(id, name, age, sex, like, phone, data,null);

  134.          return student;

  135.      }

  136.      

  137.  }

StudentDBHelper类

 1 package cn.yj3g.student.db;
 2 
 3 import cn.yj3g.student.entry.TableContanst;
 4 import android.content.Context;
 5 import android.database.sqlite.SQLiteDatabase;
 6 import android.database.sqlite.SQLiteDatabase.CursorFactory;
 7 import android.database.sqlite.SQLiteOpenHelper;
 8 import android.util.Log;
 9 
10 public class StudentDBHelper extends SQLiteOpenHelper {
11 
12     private static final String TAG = "StudentDBHelper";
13 
14     public static final String DB_NAME = "student_manager.db";
15     public static final int VERSION = 1;
16     //构造方法
17     public StudentDBHelper(Context context, String name, CursorFactory factory, int version) {
18         super(context, name, factory, version);
19 
20     }
21 
22     public StudentDBHelper(Context context) {
23         this(context, DB_NAME, null, VERSION);
24     }
25     //创建数据库
26     @Override
27     public void onCreate(SQLiteDatabase db) {
28         Log.v(TAG, "onCreate");
29         db.execSQL("create table "
30                 + TableContanst.STUDENT_TABLE
31                 + "(_id Integer primary key AUTOINCREMENT,"
32                 + "name char,age integer, sex char, likes char, phone_number char,train_date date, "
33                 + "modify_time DATETIME)");
34     }
35     //更新数据库
36     @Override
37     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
38         Log.v(TAG, "onUpgrade");
39     }
40 
41 }

Student类：

  
  
  1.  package cn.yj3g.student.entry;

  2.  

  3.  import java.io.Serializable;

  4.  

  5.  import android.view.View;

  6.  import android.widget.TextView;

  7.  import cn.yj3g.student.activity.R;

  8.  

  9.  public class Student implements Serializable{

  10.  

  11.      private long id;

  12.      private String name;

  13.      private int age;

  14.      private String sex;

  15.      private String like;

  16.      private String phoneNumber;

  17.      private String trainDate;

  18.      private String modifyDateTime;

  19.      

  20.      

  21.      public Student() {

  22.          super();

  23.      }

  24.  

  25.      public Student(long id, String name, int age, String sex, String like, String phoneNumber,

  26.              String trainDate, String modifyDateTime) {

  27.          super();

  28.          this.id = id;

  29.          this.name = name;

  30.          this.age = age;

  31.          this.sex = sex;

  32.          this.like = like;

  33.          this.phoneNumber = phoneNumber;

  34.          this.trainDate = trainDate;

  35.          this.modifyDateTime = modifyDateTime;

  36.      }

  37.      

  38.      public Student(String name, int age, String sex, String like, String phoneNumber,

  39.              String trainDate, String modifyDateTime) {

  40.          super();

  41.          this.name = name;

  42.          this.age = age;

  43.          this.sex = sex;

  44.          this.like = like;

  45.          this.phoneNumber = phoneNumber;

  46.          this.trainDate = trainDate;

  47.          this.modifyDateTime = modifyDateTime;

  48.      }

  49.  

  50.      public long getId() {

  51.          return id;

  52.      }

  53.      public void setId(long id) {

  54.          this.id = id;

  55.      }

  56.      public String getName() {

  57.          return name;

  58.      }

  59.      public void setName(String name) {

  60.          this.name = name;

  61.      }

  62.      public int getAge() {

  63.          return age;

  64.      }

  65.      public void setAge(int age) {

  66.          this.age = age;

  67.      }

  68.      public String getSex() {

  69.          return sex;

  70.      }

  71.      public void setSex(String sex) {

  72.          this.sex = sex;

  73.      }

  74.      public String getLike() {

  75.          return like;

  76.      }

  77.      public void setLike(String like) {

  78.          this.like = like;

  79.      }

  80.      public String getPhoneNumber() {

  81.          return phoneNumber;

  82.      }

  83.      public void setPhoneNumber(String phoneNumber) {

  84.          this.phoneNumber = phoneNumber;

  85.      }

  86.      public String getTrainDate() {

  87.          return trainDate;

  88.      }

  89.      public void setTrainDate(String trainDate) {

  90.          this.trainDate = trainDate;

  91.      }

  92.      public String getModifyDateTime() {

  93.          return modifyDateTime;

  94.      }

  95.      public void setModifyDateTime(String modifyDateTime) {

  96.          this.modifyDateTime = modifyDateTime;

  97.      }

  98.      @Override

  99.      public int hashCode() {

  100.          final int prime = 31;

  101.          int result = 1;

  102.          result = prime * result + age;

  103.          result = prime * result + (int) (id ^ (id >>> 32));

  104.          result = prime * result + ((like == null) ? 0 : like.hashCode());

  105.          result = prime * result + ((modifyDateTime == null) ? 0 : modifyDateTime.hashCode());

  106.          result = prime * result + ((name == null) ? 0 : name.hashCode());

  107.          result = prime * result + ((phoneNumber == null) ? 0 : phoneNumber.hashCode());

  108.          result = prime * result + ((sex == null) ? 0 : sex.hashCode());

  109.          result = prime * result + ((trainDate == null) ? 0 : trainDate.hashCode());

  110.          return result;

  111.      }

  112.      @Override

  113.      public boolean equals(Object obj) {

  114.          if (this == obj)

  115.              return true;

  116.          if (obj == null)

  117.              return false;

  118.          if (getClass() != obj.getClass())

  119.              return false;

  120.          Student other = (Student) obj;

  121.          if (age != other.age)

  122.              return false;

  123.          if (id != other.id)

  124.              return false;

  125.          if (like == null) {

  126.              if (other.like != null)

  127.                  return false;

  128.          } else if (!like.equals(other.like))

  129.              return false;

  130.          if (modifyDateTime == null) {

  131.              if (other.modifyDateTime != null)

  132.                  return false;

  133.          } else if (!modifyDateTime.equals(other.modifyDateTime))

  134.              return false;

  135.          if (name == null) {

  136.              if (other.name != null)

  137.                  return false;

  138.          } else if (!name.equals(other.name))

  139.              return false;

  140.          if (phoneNumber == null) {

  141.              if (other.phoneNumber != null)

  142.                  return false;

  143.          } else if (!phoneNumber.equals(other.phoneNumber))

  144.              return false;

  145.          if (sex == null) {

  146.              if (other.sex != null)

  147.                  return false;

  148.          } else if (!sex.equals(other.sex))

  149.              return false;

  150.          if (trainDate == null) {

  151.              if (other.trainDate != null)

  152.                  return false;

  153.          } else if (!trainDate.equals(other.trainDate))

  154.              return false;

  155.          return true;

  156.      }

  157.      @Override

  158.      public String toString() {

  159.          return "Student [id=" + id + ", name=" + name + "]";

  160.      }

  161.  }

常量TableContanst类：

 1 package cn.yj3g.student.entry;
 2 
 3 public final class TableContanst {
 4     
 5     public static final String STUDENT_TABLE = "student";
 6     
 7     public static final class StudentColumns {
 8         public static final String ID = "_id";
 9         public static final String NAME = "name";
10         public static final String AGE = "age";
11         public static final String SEX = "sex";
12         public static final String LIKES = "likes";
13         public static final String PHONE_NUMBER = "phone_number";
14         public static final String TRAIN_DATE = "train_date";
15         public static final String MODIFY_TIME = "modify_time";
16     }
17 }

最后我将我的values里的strings.xml和AndroidManifest.xml附在下面，以供大家参考。

strings.xml：

  
  
  1.  <?xml version="1.0" encoding="utf-8"?>

  2.  <resources>

  3.      <string name="hello">Hello World, TextStudentManager!</string>

  4.      <string name="app_name">学员管理系统</string>

  5.      <string name="information_write">学员信息修改</string>

  6.      <string name="button1">男</string>

  7.      <string name="button2">女</string>

  8.      <string name="box1">唱歌</string>

  9.      <string name="box2">跳舞</string>

  10.      <string name="box3">健身</string>

  11.      <string name="myButton">添加学员信息</string>

  12.      <string name="spinner">请选择</string>    

  13.  </resources>

AndroidManifest.xml：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3       package="cn.yj3g.student.activity"
 4       android:versionCode="1"
 5       android:versionName="1.0">
 6     <uses-sdk android:minSdkVersion="8" />
 7 
 8     <application android:icon="@drawable/student"  android:label="@string/app_name">
 9         <activity android:name=".StudentListActivity"
10                   android:label="学员信息列表">
11             <intent-filter>
12                 <action android:name="android.intent.action.MAIN" />
13                 <category android:name="android.intent.category.LAUNCHER" />
14             </intent-filter>
15         </activity>
16         
17          <activity android:name=".AddStudentActivity"
18                   android:label="学员信息添加">
19         </activity>
20           <activity android:name=".ShowStudentActivity"
21                   android:label="学员详细信息">
22         </activity>
23          <activity android:name=".StudentSearch"
24                   android:label="学员信息查询">
25         </activity>
26          <activity android:name=".SearchResult"
27                   android:label="查询结果">
28         </activity>
29         <provider 
30         android:name=".MyStudentManagerProvider"
31         android:authorities="cn.yj3g.student.activity.MyStudentManagerProvider"></provider>
32         <uses-library android:name="android.test.runner" />  <!-- android测试包 -->
33         
34     </application>
35     <uses-permission android:name="android.permission.READ_CONTACTS"></uses-permission> 
36     <instrumentation android:name="android.test.InstrumentationTestRunner"
37           android:targetPackage="cn.yj3g.student.activity" android:label="Tests for My App" />
38 </manifest>


由于自己也是初学者，所以大家发现什么问题，可以留言，大家一起学习。


原文地址：  http://www.cnblogs.com/zxl-jay/archive/2011/09/21/2182890.html#2302140


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