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AndroidStudio RecyclerView item点击事件及解决RadioButton选中混乱_android recyclerview appcompatradiobutton错乱

作者：你好赵伟 | 2024-06-18 05:05:01

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android recyclerview appcompatradiobutton错乱

因为时间不够，先整理一些小知识点，最后再统一排版

1 RecyclerView点击事件

  1. //设置点击事件的接口
  2. private Inspection_Switch_One_Level_Adapter.ItemClickListener mItemClickListener;
  3.  
  4. public interface ItemClickListener {
  5.     void onItemClick(int position);
  6. }
  1. public void setOnItemClickListener(Inspection_Switch_One_Level_Adapter.ItemClickListener itemClickListener) {
  2.     this.mItemClickListener = itemClickListener;
  3. }

在onBindViewHolder中加入如下代码

  1. if (mItemClickListener != null) {
  2.     holder.itemView.setOnClickListener(new View.OnClickListener() {
  3.         @Override
  4.         public void onClick(View v) {
  5.             //if (mEditMode == 1) {
  6.                 //if (!isSelect.get(position)) {
  7.                     //holder.ImageView_Switch_Check.setImageResource(R.drawable.ic_checked);
  8.                   //  isSelect.remove(position);
  9.                     //isSelect.put(position, true);
  10.                 //} else {
  11.                     //holder.ImageView_Switch_Check.setImageResource(R.drawable.ic_uncheck);
  12.                     //isSelect.remove(position);
  13.                     //isSelect.put(position, false);
  14.                 //}
  15.             //}
  16.             //mItemClickListener.onItemClick(position);
  17.         }
  18.     });
  19. }

2 RecyclerView长按事件

  1. private Inspection_Switch_One_Level_Adapter.OnItemLongClickListener monItemLongClickListener;
  2.  
  3. public interface OnItemLongClickListener {
  4.     void onItemLongClickListener(int position);
  5. }
  6.  
  7. public void setMonItemLongClickListener(Inspection_Switch_One_Level_Adapter.OnItemLongClickListener monItemLongClickListener) {
  8.     this.monItemLongClickListener = monItemLongClickListener;
  9. }
  1. 在onBindViewHolder中加入如下代码：
  2. if (monItemLongClickListener != null) {
  3.     holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
  4.         @Override
  5.         public boolean onLongClick(View v) {
  6.             monItemLongClickListener.onItemLongClickListener(position);
  7.             //返回值设为true表示消耗了时间不会传递
  8.             return true;
  9.         }
  10.     });
  11. }

3 RecyclerView 滑动之后导致RadioButton错乱的问题

  由于RecyclerView的onBindViewHolder()方法，只有在getItemViewType()返回类型不同时才会调用，这点是跟ListView的getView()方法不同的地方，所以如果想要每次都调用onBindViewHolder()刷新item数据，就要重写getItemViewType()，让其返回position，否则很容易产生数据错乱的现象。
我这是是先用一个HashMap将RadioButton的选中情况与item的position情况存起来 以便后面的调用，然后再重写getItemViewType()方法返回值是position即可保证RadioButton选中情况不发生错乱，

本demo可在日志中完整打印出来结果，便于查看。

下面是代码：
1)适配器的代码：

  1. package com.example.administrator.radiobutton_test_1;
  2.  
  3. import android.support.v7.widget.RecyclerView;
  4. import android.util.Log;
  5. import android.view.LayoutInflater;
  6. import android.view.View;
  7. import android.view.ViewGroup;
  8. import android.widget.RadioButton;
  9. import android.widget.RadioGroup;
  10. import android.widget.TextView;
  11.  
  12. import java.util.HashMap;
  13. import java.util.List;
  14.  
  15. /**
  16.  * Created by Administrator on 2019/1/9 0009.
  17.  */
  19. public class RBandETtest_Adapter extends RecyclerView.Adapter<RBandETtest_Adapter.ViewHolder> {
  20.     private List<RBandETtest> mRBandETtestList;
  21.     private int layoutPosition;
  22.  
  23.     static class ViewHolder extends RecyclerView.ViewHolder {
  24.         RadioGroup radioGroup;
  25.         RadioButton radioButton_Yes;
  26.         RadioButton radioButton_No;
  27.         TextView editText_remark;
  28.  
  29.         public ViewHolder(View view) {
  30.             super(view);
  31.             radioButton_Yes = (RadioButton) view.findViewById(R.id.RadioButton_Yes);
  32.             radioButton_No = (RadioButton) view.findViewById(R.id.RadioButton_No);
  33.             radioGroup = (RadioGroup) view.findViewById(R.id.radioGroup);
  34.             editText_remark = (TextView) view.findViewById(R.id.editText_remark);
  35.         }
  36.     }
  37.  
  38.     public RBandETtest_Adapter(List<RBandETtest> RBandETtestList) {
  39.         mRBandETtestList = RBandETtestList;
  40.     }
  41.  
  42.     @Override
  43.     public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
  44.         View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.rbandettest_item, parent, false);
  45.         ViewHolder holder = new ViewHolder(view);
  46.         return holder;
  47.     }
  48.     //0代表否，1代表是，2代表未选择
  49.     private static HashMap<Integer, Integer> isSelect = new HashMap<>();
  50.  
  51.     public void iniChossen() {
  52.         //这里取反
  53.         for (int i = 0; i < mRBandETtestList.size(); i++) {
  54.             isSelect.put(i, 2);
  55.         }
  56.     }
  57.     public void setSelectCondition(int position) {
  58.         if (b.equals("是")) {
  59.             isSelect.remove(position);
  60.             isSelect.put(position, 1);
  61.         } else if (b.equals("否")) {
  62.             isSelect.remove(position);
  63.             isSelect.put(position, 0);
  64.         } else {
  65.  
  66.         }
  67.     }
  68.  
  69.     public HashMap<Integer, Integer> getSelectCondition() {
  70.         return isSelect;
  71.     }
  72.     //设置点击事件的接口
  73.     private RBandETtest_Adapter.ItemClickListener mItemClickListener;
  74.  
  75.     public interface ItemClickListener {
  76.         void onItemClick(int position);
  77.     }
  78.  
  79.     public void setOnItemClickListener(RBandETtest_Adapter.ItemClickListener itemClickListener) {
  80.         this.mItemClickListener = itemClickListener;
  81.     }
  82.  
  83.     public String returnRadioButtonText() {
  84.         String ss = "";
  85.         ss = b;
  86.         return ss;
  87.     }
  88.     String b;
  89.     // 由于RecyclerView的onBindViewHolder()方法，只有在getItemViewType()返回类型不同时才会调用，
  90.     // 这点是跟ListView的getView()方法不同的地方，所以如果想要每次都调用onBindViewHolder()刷新item数据，
  91.     // 就要重写getItemViewType()，让其返回position，否则很容易产生数据错乱的现象。
  92.     @Override
  93.     public int getItemViewType(int position) {
  94.         return position;
  95.     }
  96.  
  97.     @Override
  98.     public void onBindViewHolder(final ViewHolder holder, final int position) {
  99.         try {
  100.             if (isSelect.get(position) == 0) {
  101.                 holder.radioButton_No.setChecked(true);
  102.             } else if (isSelect.get(position) == 1) {
  103.                 holder.radioButton_Yes.setChecked(true);
  104.             } else {
  105.                 holder.radioGroup.clearCheck();
  106.             }
  107.             Log.e("-------------------" + String.valueOf(position), String.valueOf(isSelect.get(position)));
  108.             //每一次都要重新加载radioButton的选中值
  109.             holder.radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
  110.                 @Override
  111.                 public void onCheckedChanged(RadioGroup radioGroup, int i) {
  112.                     layoutPosition = holder.getLayoutPosition();
  113.                     mItemClickListener.onItemClick(i);
  114.                     if (radioGroup.getCheckedRadioButtonId() == R.id.RadioButton_Yes) {
  115.                         b = "是";
  116.                     } else if (radioGroup.getCheckedRadioButtonId() == R.id.RadioButton_No) {
  117.                         b = "否";
  118.                     } else {
  119.                         b = "未选择";
  120.                     }
  121.                     setSelectCondition(position);
  122.                 }
  123.             });
  124.         } catch (Exception e) {
  125.             e.printStackTrace();
  126.         }
  127.     }
  128.     @Override
  129.     public int getItemCount() {
  130.         return mRBandETtestList.size();
  131.     }
  132. }

2)布局item代码，很简单只有一组RadioButton，MainActivity中我是循环了150组

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:orientation="vertical" android:layout_width="match_parent"
  4.     android:layout_height="wrap_content"
  5.     >
  6.     <RadioGroup
  7.         android:layout_width="wrap_content"
  8.         android:layout_height="wrap_content"
  9.         android:orientation="horizontal"
  10.         android:id="@+id/radioGroup">
  11.         <RadioButton
  12.             android:layout_width="wrap_content"
  13.             android:layout_height="wrap_content"
  14.             android:id="@+id/RadioButton_Yes"
  15.             android:text="是"/>
  16.         <RadioButton
  17.             android:layout_width="wrap_content"
  18.             android:layout_height="wrap_content"
  19.             android:id="@+id/RadioButton_No"
  20.             android:text="否"/>
  21.     </RadioGroup>
  22. </LinearLayout>

3)MainActivity中的代码

  1. package com.example.administrator.radiobutton_test_1;
  2.  
  3. import android.os.Bundle;
  4. import android.support.v7.app.AppCompatActivity;
  5. import android.support.v7.widget.LinearLayoutManager;
  6. import android.support.v7.widget.RecyclerView;
  7. import android.util.Log;
  8. import android.util.SparseBooleanArray;
  9. import android.view.View;
  10. import android.widget.Button;
  11.  
  12. import java.util.ArrayList;
  13. import java.util.HashMap;
  14. import java.util.List;
  15.  
  16. public class MainActivity extends AppCompatActivity {
  17.  
  18.     RecyclerView recyclerView;
  19.     public List<RBandETtest> rBandETtestList = new ArrayList<>();
  20.     RBandETtest_Adapter rBandETtest_adapter;
  21.     ArrayList<RBandETtest> selectlist;
  22.     Button button;
  23.     SparseBooleanArray sparseBooleanArray;
  24.     HashMap<Integer,Integer> isSelect;
  25.  
  26.     @Override
  27.     protected void onCreate(Bundle savedInstanceState) {
  28.         super.onCreate(savedInstanceState);
  29.         setContentView(R.layout.activity_main);
  30.         recyclerView = (RecyclerView) findViewById(R.id.RecyclerView);
  31.         button=(Button)findViewById(R.id.button);
  32.         iniData();
  33.         selectlist = new ArrayList<>();
  34.         LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
  35.         recyclerView.setLayoutManager(linearLayoutManager);
  36.         rBandETtest_adapter = new RBandETtest_Adapter(rBandETtestList);
  37.         recyclerView.setAdapter(rBandETtest_adapter);
  38.         rBandETtest_adapter.iniChossen();
  39.         rBandETtest_adapter.setOnItemClickListener(new RBandETtest_Adapter.ItemClickListener() {
  40.             @Override
  41.             public void onItemClick(int position) {
  42.                 String ss=rBandETtest_adapter.returnRadioButtonText();
  43.             }
  44.         });
  45.         button.setOnClickListener(new View.OnClickListener() {
  46.             @Override
  47.             public void onClick(View view) {
  48.                 isSelect=rBandETtest_adapter.getSelectCondition();
  49.                 String s1="是";
  50.                 String s2="否";
  51.                 for (int i = 0; i < isSelect.size(); i++) {
  52.                     if (isSelect.get(i)==0){
  53.                         Log.e("--------------"+i, s2 );
  54.                     }else if (isSelect.get(i)==1){
  55.                         Log.e("--------------"+i, s1 );
  56.                     }else {
  57.                         Log.e("--------------"+i, "未选择" );
  58.                     }
  59.  
  60.                 }
  61.             }
  62.         });
  63.     }
  64.     public void iniData() {
  65.         for (int i = 0; i < 150; i++) {
  66.             RBandETtest rbet = new RBandETtest("123");
  67.             rBandETtestList.add(rbet);
  68.         }
  69.     }
  70. }

4)父布局代码

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     xmlns:tools="http://schemas.android.com/tools"
  4.     android:id="@+id/activity_main"
  5.     android:layout_width="match_parent"
  6.     android:layout_height="match_parent"
  7.     android:paddingBottom="@dimen/activity_vertical_margin"
  8.     android:paddingLeft="@dimen/activity_horizontal_margin"
  9.     android:paddingRight="@dimen/activity_horizontal_margin"
  10.     android:paddingTop="@dimen/activity_vertical_margin"
  11.     tools:context="com.example.administrator.radiobutton_test_1.MainActivity">
  12.  
  13.  
  14.     <FrameLayout
  15.         android:layout_width="match_parent"
  16.         android:layout_height="wrap_content">
  17.         <android.support.v7.widget.RecyclerView
  18.             android:layout_width="match_parent"
  19.             android:layout_height="match_parent"
  20.             android:id="@+id/RecyclerView" />
  21.     </FrameLayout>
  22.  
  23.     <LinearLayout
  24.         android:layout_width="match_parent"
  25.         android:layout_height="wrap_content"
  26.         android:layout_alignParentBottom="true"
  27.         android:layout_alignParentLeft="true"
  28.         android:layout_alignParentStart="true">
  29.         <Button
  30.         android:layout_width="match_parent"
  31.         android:layout_height="wrap_content"
  32.         android:id="@+id/button"
  33.         android:text="获取选中项"
  34.         android:layout_alignParentBottom="true"
  35.         android:layout_alignParentLeft="true"
  36.         android:layout_alignParentStart="true" />
  37.     </LinearLayout>
  38.  
  39.  
  40. </RelativeLayout>

 代码比较简单，是我专门做的一个测试demo，有需要的可以尝试迁移到自己的项目中去，欢迎交流

下面是一个demo的链接

防止RecyclerView滑动出现数据错乱包括RadioButton，EditText

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