【Android】【移动应用开发】APP案列_android开发项目app实例

作者：凡人多烦事01 | 2024-03-16 20:37:28

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android开发项目app实例

1. 通讯录功能实现

⚪页面布局代码如下：
activity_main.xml(主界面布局代码)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
<!--    打电话-->
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="35dp"
        android:background="#000">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:text="通讯录"
            android:textColor="#fff"
            android:textSize="20sp"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/tvadd"
            android:layout_alignParentRight="true"
            android:layout_marginRight="20dp"
            android:layout_marginTop="6dp"
            android:text="添加"
            android:textColor="#fff"
            android:textSize="18sp"/>

    </RelativeLayout>

    <ListView
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:dividerHeight="2dp"
        android:id="@+id/lv"/>

</LinearLayout>
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activity_add_layout.xml(添加联系人界面布局代码)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="35dp"
        android:background="#000">

        <ImageView
            android:layout_width="30dp"
            android:layout_height="25dp"
            android:layout_marginTop="5dp"
            android:id="@+id/imgreturn"
            android:layout_marginLeft="10dp"
            android:src="@mipmap/row_left"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:layout_toRightOf="@+id/imgreturn"
            android:text="返回"
            android:textSize="20sp"
            android:textColor="#fff"/>
    </RelativeLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:orientation="vertical">

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/edtName"
            android:hint="请输入姓名"/>
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/edtTel"
            android:hint="请输入电话号码"/>
    </LinearLayout>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="120dp"
        android:layout_margin="10dp">

        <ImageView
            android:layout_width="40dp"
            android:layout_height="120dp"
            android:src="@mipmap/row_left"
            android:id="@+id/imgleft"/>

        <ImageView
            android:layout_width="120dp"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:id="@+id/img"
            android:src="@mipmap/liubei"/>

        <ImageView
            android:layout_width="40dp"
            android:layout_height="120dp"
            android:src="@mipmap/row_right"
            android:layout_alignParentRight="true"
            android:id="@+id/imgright"/>
    </RelativeLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal">

        <Button
            android:layout_width="80dp"
            android:layout_height="wrap_content"
            android:id="@+id/btnreset"
            android:text="重置"
            android:textSize="20sp"/>
        <Button
            android:layout_width="80dp"
            android:layout_height="wrap_content"
            android:id="@+id/btnok"
            android:text="添加"
            android:textSize="20sp"/>
    </LinearLayout>
</LinearLayout>
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在这里插入图片描述

item.xml(模板布局代码)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">

        <ImageView
            android:layout_width="60dp"
            android:layout_height="80dp"
            android:id="@+id/lxrimg"
            android:src="@mipmap/liubei"/>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/lxrname"
            android:layout_marginLeft="15dp"
            android:layout_marginTop="10dp"
            android:text="刘备"
            android:textSize="20sp"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/lxrtel"
            android:layout_marginLeft="15dp"
            android:layout_marginTop="10dp"
            android:text="12345678"
            android:textSize="20sp"/>
    </LinearLayout>
</LinearLayout>
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在这里插入图片描述

⚪Java代码如下：
Main_Activity.java(主界面功能实现代码)

package com.example.ceshi;


import androidx.appcompat.app.AppCompatActivity;
import androidx.collection.ArraySet;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.HashMap;

public class MainActivity extends AppCompatActivity {
    private ListView lv;
    private TextView add;
    private SimpleAdapter adapter = null;
    private ArrayList<Person> persons = new ArrayList<Person>();

    private boolean flag = false;
    private ArrayList<HashMap<String, Object>> lxrList = new ArrayList<HashMap<String, Object>>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
		
        Intent intent = this.getIntent();
        // 从add_layout的intent附加信息中取出添加的联系人信息
        persons = (ArrayList<Person>) intent.getSerializableExtra("persons");
        //标记已经通过add_layout界面添加了联系人信息，即persons不为空指针
        flag = intent.getBooleanExtra("flag", false);
        if (flag) {
            for (int i = 0; i < persons.size(); i++) {
                HashMap<String, Object> map = new HashMap<String, Object>();
                map.put("imgid", persons.get(i).getImgid());
                map.put("name", persons.get(i).getName());
                map.put("tel", persons.get(i).getTel());
                lxrList.add(map);
            }
            String[] from = {"imgid", "name", "tel"};
            int[] to = {R.id.lxrimg, R.id.lxrname, R.id.lxrtel};
            adapter = new SimpleAdapter(this, lxrList, R.layout.item, from, to);
            lv.setAdapter(adapter);
        }
        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Intent itdail = new Intent(Intent.ACTION_CALL, Uri.parse("tel:"+persons.get(position).getTel()) );
                MainActivity.this.startActivity(itdail);
            }
        });
        // 添加监听事件
        add.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity.this, add_layout.class);
                startActivity(intent);
            }
        });
    }

    void initView() {
        lv = this.findViewById(R.id.lv);
        add = this.findViewById(R.id.tvadd);
    }
}
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add_layout.java(添加联系人功能代码)

package com.example.ceshi;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import java.util.ArrayList;

public class add_layout extends AppCompatActivity {
    EditText edtName, edtTel;
    ImageView imgReturn, imgLeft, imgRight, img;
    int imgId[] = { R.mipmap.liubei,R.mipmap.caocao,R.mipmap.guanyu, R.mipmap.huangzhong, R.mipmap.lusu};
    int index = 0;
    Button btnReset,btnOk;
    ArrayList<Person> persons=new ArrayList<Person>();
    private  boolean flag=true;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.setContentView(R.layout.activity_add_layout);
        initView();
        //头像图片向一张张右翻
        imgRight.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (++index >= imgId.length) {
                    index = 0;//翻到最后一张后，再翻到第一张
                }
                img.setImageResource(imgId[index]);
            }
        });
        //头像图片向一张张左翻
        imgLeft.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (--index <0) {
                    index = imgId.length-1;//翻到第一张后，再翻到最后一张
                }
                img.setImageResource(imgId[index]);
            }
        });
		// 重置按钮监听事件
        btnReset.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                edtName.setText("");
                edtTel.setText("");
            }
        });
        // 添加按钮监听事件
        btnOk.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String name = edtName.getText().toString();
                String tel = edtTel.getText().toString();
                int imgid = imgId[index];
                Person person = new Person(name,tel,imgid);
                persons.add(person);
                edtTel.setText("");
                edtName.setText("");
            }
        });
        // 返回监听事件
        imgReturn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(add_layout.this, MainActivity.class);
                intent.putExtra("persons", persons);
                intent.putExtra("flag", flag);
                startActivity(intent);
            }
        });
    }

    void initView() {
        edtName = (EditText) this.findViewById(R.id.edtName);
        edtTel = (EditText) this.findViewById(R.id.edtTel);
        img = (ImageView) this.findViewById(R.id.img);
        imgLeft = (ImageView) this.findViewById(R.id.imgleft);
        imgRight = (ImageView) this.findViewById(R.id.imgright);
        imgReturn= (ImageView) this.findViewById(R.id.imgreturn);
        btnOk = (Button) this.findViewById(R.id.btnok);
        btnReset = (Button) this.findViewById(R.id.btnreset);

    }
}
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Person.java
(用于封装联系人所有信息，包含姓名，电话，头像；便于Intent传递ArrayList类型数据，需要Serializable接口)

package com.example.ceshi;

import java.io.Serializable;

public class Person implements Serializable {
    private String name;
    private String tel;
    private int imgid;
    public Person(String name, String tel, int imgid) {
        this.name = name;
        this.tel = tel;
        this.imgid = imgid;
    }
    public String getName() {
        return name;
    }
    public String getTel() {
        return tel;
    }

    public Object getImgid() {
        return imgid;
    }
}

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2. 考试系统

布局代码

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/kaoshiXT">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" />

        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@android:id/tabcontent">

            <!--            单选布局-->
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:id="@+id/danxuan"
                android:orientation="vertical">

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="1.负责管理计算器的硬件资源和如那件资源？"
                    android:textSize="18dp"/>

                <RadioGroup
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/single">
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/a"
                        android:text="A. 操作系统"/>
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/b"
                        android:text="B. 操作系统"/>
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/c"
                        android:text="C. 操作系统"/>
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/d"
                        android:text="D. 操作系统"/>
                </RadioGroup>
            </LinearLayout>
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:id="@+id/duoxuan1"
                android:orientation="vertical">

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="2.负责管理计算器的件资源？"
                    android:textSize="18dp"/>

                <RadioGroup
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/single1">
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/aa"
                        android:text="A. 操作系统"/>
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/bb"
                        android:text="B. jisuanji系统"/>
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/cc"
                        android:text="C. 操作系统"/>
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/dd"
                        android:text="D. 操作系统"/>
                </RadioGroup>
            </LinearLayout>
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:id="@+id/tiankong"
                android:orientation="vertical">

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="3.负责管ddd理计算器的硬件资源和如那件资源？"
                    android:textSize="18dp"/>

                <RadioGroup
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/single2">
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/aaa"
                        android:text="A. 操作系统"/>

                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/ddd"
                        android:text="D. 操作系统"/>
                </RadioGroup>
            </LinearLayout>
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:id="@+id/jiandati"
                android:orientation="vertical">

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="4.负责管理计算器的硬件资源和ddd如那件资源？"
                    android:textSize="18dp"/>

                <RadioGroup
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/single4">
                </RadioGroup>
            </LinearLayout>

        </FrameLayout>
    </LinearLayout>

</TabHost>
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Java功能代码

package com.example.kaoshixitong;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.widget.TabHost;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        TabHost tabHost = (TabHost) findViewById(R.id.kaoshiXT);
        tabHost.setup();
        tabHost.addTab(tabHost.newTabSpec("tab01").setIndicator("单选题").setContent(R.id.danxuan));
        tabHost.addTab(tabHost.newTabSpec("tab01").setIndicator("多选").setContent(R.id.duoxuan1));
        tabHost.addTab(tabHost.newTabSpec("tab01").setIndicator("填空").setContent(R.id.tiankong));
        tabHost.addTab(tabHost.newTabSpec("tab01").setIndicator("简答题").setContent(R.id.jiandati));

    }
}
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在这里插入图片描述

3. 打地鼠游戏

布局代码

<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/table"
    android:background="@mipmap/caoping"
    android:shrinkColumns="* "
    android:stretchColumns="* ">
<!--    第一行-->
    <TableRow
        android:id="@+id/tablerow1"
        android:layout_height="0dp"
        android:layout_width="match_parent"
        android:layout_weight="1"
        android:gravity="center">

        <TextView
            android:id="@+id/tvcount"
            android:text="击中数：0"
            android:textSize="20dp"
            android:gravity="center"
            android:textColor="#00ffff"
            android:textStyle="bold"/>
        <ImageView
            android:id="@+id/im12"
            android:layout_marginLeft="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im13"
            android:layout_marginLeft="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im14"
            android:layout_marginLeft="5dp"
            android:background="@mipmap/baiban"/>
        <TextView
            android:id="@+id/tvtime"
            android:text="倒计时：0:0:00"
            android:textSize="20dp"
            android:gravity="center"
            android:layout_marginLeft="5dp"
            android:textColor="#00ffff"
            android:textStyle="bold"/>
    </TableRow>

    <!--    第二行-->
    <TableRow
        android:id="@+id/tablerow2"
        android:layout_height="0dp"
        android:layout_width="match_parent"
        android:layout_weight="1"
        android:gravity="center">

        <ImageView
            android:id="@+id/im21"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im22"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im23"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im24"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im25"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
    </TableRow>

    <!--    第三行-->
    <TableRow
        android:id="@+id/tablerow3"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:layout_width="match_parent"
        android:gravity="center">

        <ImageView
            android:id="@+id/im31"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im32"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im33"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im34"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im35"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
    </TableRow>

    <!--    第四行-->
    <TableRow
        android:id="@+id/tablerow4"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:layout_width="match_parent"
        android:gravity="center">

        <ImageView
            android:id="@+id/im41"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im42"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im43"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im44"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im45"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
    </TableRow>

    <!--    第五行-->
    <TableRow
        android:id="@+id/tablerow5"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:layout_width="match_parent"
        android:gravity="center">

        <Button
            android:id="@+id/btnraplay"
            android:text="重玩"
            android:textSize="25dp"
            android:background="@android:color/transparent"
            android:textColor="#00ffff"
            android:layout_width="108px"
            android:layout_height="wrap_content"/>
        <ImageView
            android:id="@+id/im52"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im53"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <ImageView
            android:id="@+id/im54"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="5dp"
            android:background="@mipmap/baiban"/>
        <Button
            android:id="@+id/btnplay"
            android:text="开始"
            android:textSize="25dp"
            android:layout_width="108px"
            android:background="@android:color/transparent"
            android:textColor="#00ffff"
            android:layout_marginLeft="5dp"
            android:layout_height="wrap_content"/>
    </TableRow>
</TableLayout>
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Java功能代码

package com.example.da_di_shu;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button btnplay, btnreplay;
    private TextView tvcount, tvtime;
    private ImageView[] imgs = new ImageView[21];
    private int[] imageID = {R.id.im12, R.id.im13, R.id.im14,
                R.id.im21, R.id.im22, R.id.im23, R.id.im24, R.id.im25,
                R.id.im31, R.id.im32, R.id.im33, R.id.im34, R.id.im35,
                R.id.im41, R.id.im42, R.id.im43, R.id.im44, R.id.im45,
                            R.id.im52, R.id.im53, R.id.im54};
    int count = 0; // 记录击中的老鼠数
    int time = 60; // 倒计时60秒
    int oldID = 0, newID = 0;
    boolean flag = true; // 时间到标志

    Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            imgs[oldID].setBackgroundResource(R.mipmap.baiban);
            newID =(int) (Math.random()*20);
            imgs[newID].setBackgroundResource(R.mipmap.ic_launcher);
            oldID = newID;
        }
    };
    Runnable runnable = new Runnable() {
        @Override
        public void run() {
            while (flag) {
//                handler.sendEmptyMessage(0);
                try {
                    Thread.sleep(1000);
                    Message message = Message.obtain();
                    handler.sendMessage(message);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        btnplay.setOnClickListener(this);
        btnreplay.setOnClickListener(this);
        for (int i = 0; i< imgs.length; i++) {
            imgs[i].setOnClickListener(this);
        }
    }
    // 定义变量
    void initView() {
        tvcount = this.findViewById(R.id.tvcount);
        tvtime = this.findViewById(R.id.tvtime);
        btnplay = this.findViewById(R.id.btnplay);
        btnreplay = this.findViewById(R.id.btnraplay);
        for (int i = 0; i<imgs.length; i++) {
            imgs[i] =(ImageView) this.findViewById(imageID[i]);
        }
    }

//    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btnplay:
                new MyCount(60*1000, 1000).start();
                Thread thread1 = new Thread(runnable);
                thread1.start();
                break;
            case R.id.btnraplay:
                flag = true;
                new MyCount(60*1000, 1000).start();
                Thread thread2 = new Thread(runnable);
                thread2.start();
                break;
            default:
                if (imgs[oldID].getId() == v.getId()) {
                    count++;
                    tvcount.setText("击中数："+ count);
                    if (count == 20) {
                        Toast.makeText(MainActivity.this, "祝你顺利过关！", Toast.LENGTH_LONG).show();
                        flag = false;
                    }
                } else {
                    Toast.makeText(MainActivity.this, "对不起，你没有击中！", Toast.LENGTH_SHORT).show();
                }
                break;
        }
    }

    @Override
    public void onPointerCaptureChanged(boolean hasCapture) {
        super.onPointerCaptureChanged(hasCapture);
    }

    // 计时
    private class MyCount extends CountDownTimer {
        public MyCount (long time, long interval) {
            super(time, interval);
        }
        @Override
        public void onFinish() {
            flag = false;
            tvtime.setText("时间到！");
        }
        @Override
        public void onTick(long millis) {
            int hour = (int) millis /1000 / 3600;
            int minute = (int) millis /1000 % 3600 / 60;
            int second = (int) millis /1000 % 3600 % 60;
            tvtime.setText("倒计时："+hour +":"+minute+":"+second);

        }
    }
}
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在这里插入图片描述

4. 手势实现图片的轮播效果【相册】

通过该实例可以实现【相册APP】

布局代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ViewFlipper
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/rv"
        android:flipInterval="2000"><!--    切换时长2s-->

    </ViewFlipper>
</LinearLayout>
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功能代码

package com.example.lunbo;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.app.Activity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;
import android.widget.ViewFlipper;

import java.util.ArrayList;

public class MainActivity extends Activity implements View.OnTouchListener {
    private GestureDetector mDetector;
    private ViewFlipper viewFlipper; // ViewFlipper 手势检测类
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        viewFlipper = findViewById(R.id.rv);

        ImageView imageView1 = new ImageView(this); // 创建ImageView对象
        imageView1.setImageResource(R.mipmap.a1); // 设置图片
        viewFlipper.addView(imageView1); // 将ImageView对象加载到ViewFlipper上

        ImageView imageView2 = new ImageView(this); // 创建ImageView对象
        imageView2.setImageResource(R.mipmap.a2); // 设置图片
        viewFlipper.addView(imageView2); // 将ImageView对象加载到ViewFlipper上

        ImageView imageView3 = new ImageView(this); // 创建ImageView对象
        imageView3.setImageResource(R.mipmap.a3); // 设置图片
        viewFlipper.addView(imageView3); // 将ImageView对象加载到ViewFlipper上

        ImageView imageView4 = new ImageView(this); // 创建ImageView对象
        imageView4.setImageResource(R.mipmap.a4); // 设置图片
        viewFlipper.addView(imageView4); // 将ImageView对象加载到ViewFlipper上

        viewFlipper.setOnTouchListener((View.OnTouchListener) this);
        mDetector = new GestureDetector(new simpleGestureListener());
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        return  mDetector.onTouchEvent(event); // 识别手势
    }

    private class simpleGestureListener extends GestureDetector.SimpleOnGestureListener {
        final int huadong_juli = 100; // 滑动距离
        final int huadong_sudu = 200; // 滑动速度
        // 用户按下屏幕就会触发
        @Override
        public boolean onDown(MotionEvent e) {
            return true;
        }
        /* 滑屏，用户按下触摸屏，快速移动后松开，有一个 MotionEvent ACTION_DOWN, 多个 ACTION_MOVE, 一个ACTION_UP触发
        e1: 第一个 ACTION_DOWN MotionEvent         e2: 最后一个 ACTION_MOVE MotionEvent
        velocityX: X轴上的移动速度         velocityY: Y轴上的移动速度*/

        // 左右切换
        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            // 左滑屏
            if (e1.getX() -e2.getX() > huadong_juli && Math.abs(velocityX) > huadong_sudu) {
                viewFlipper.showNext(); // 下一个View
            } else
                // 右滑屏
                if (e2.getX() - e1.getX() > huadong_juli && Math.abs(velocityX) > huadong_sudu) {
                    viewFlipper.showPrevious(); // 上一个View
                }
            return true;
        }

        // 上下切换
        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            // 上滑屏
            if (e1.getY() -e2.getY() > huadong_juli && Math.abs(velocityY) > huadong_sudu) {
                viewFlipper.showNext(); // 下一个View
            } else
                // 下滑屏
                if (e2.getY() - e1.getY() > huadong_juli && Math.abs(velocityY) > huadong_sudu) {
                    viewFlipper.showPrevious(); // 上一个View
                }
            return true;
        }
    }
}
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请添加图片描述

5. APP引导页，图片轮播功能实现

1) ViewPager

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