Android中RecyclerView在TV中处理控件焦点移动，EditText值的修改，CheckBox复用等问题解决
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编写不易，如有转载，请声明出处: 梦回河口：http://blog.csdn.net/zxc514257857/article/details/74990099
前言
这篇博客是 :Android中RecyclerView的item中控件的点击事件添加删除一行、上移下移一行的代码实现 的后续篇。主要是讲RecyclerView在TV中控件焦点移动的处理以及RecyclerView的item中包含 EditText和CheckBox控件的处理逻辑
Demo展示图片
布局代码
// (layout)activity_main.xml<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <android.support.v7.widget.RecyclerView android:id="@+id/recyclerview" android:layout_width="match_parent" android:layout_height="wrap_content" android:overScrollMode="never" android:scrollbars="none"/></RelativeLayout>----------------------------------------------------------------------------------------// (layout)recyclerview_item.xml<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/recyclerview_bg"> <TextView android:id="@+id/num" android:layout_width="25dp" android:layout_height="wrap_content" android:layout_centerVertical="true" android:gravity="center" android:textSize="20sp" android:layout_margin="10dp" android:textColor="#fff"/> <EditText android:id="@+id/data" android:layout_toRightOf="@+id/num" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" android:layout_marginLeft="4dp" android:layout_width="50dp" android:layout_height="wrap_content" android:layout_centerVertical="true" android:padding="5dp" android:gravity="center" android:background="@drawable/edittext_selector" android:textSize="20sp" android:textColor="@color/colorAccent"/> <CheckBox android:id="@+id/isForsale" android:layout_toRightOf="@+id/data" android:layout_centerVertical="true" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="11dp" android:focusable="true" android:button="@drawable/checkbox_selector"/> <LinearLayout android:id="@+id/ll" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="horizontal"> <Button android:id="@+id/add" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="添加" android:textSize="20sp" android:layout_margin="5dp" android:minHeight="0dp" android:minWidth="0dp" android:padding="5dp" android:background="@drawable/button_selector" android:clickable="true" android:textColor="@color/colorAccent"/> <Button android:id="@+id/del" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="删除" android:textSize="20sp" android:layout_margin="5dp" android:minHeight="0dp" android:minWidth="0dp" android:padding="5dp" android:background="@drawable/button_selector" android:clickable="true" android:textColor="@color/colorAccent"/> <Button android:id="@+id/up" android:layout_width="35dp" android:layout_height="wrap_content" android:text="↑" android:textSize="20sp" android:gravity="center" android:layout_margin="5dp" android:minHeight="0dp" android:minWidth="0dp" android:padding="5dp" android:background="@drawable/button_selector" android:clickable="true" android:textColor="@color/colorAccent"/> <Button android:id="@+id/down" android:layout_width="35dp" android:layout_height="wrap_content" android:text="↓" android:textSize="20sp" android:gravity="center" android:layout_margin="5dp" android:minHeight="0dp" android:minWidth="0dp" android:padding="5dp" android:background="@drawable/button_selector" android:clickable="true" android:textColor="@color/colorAccent"/> </LinearLayout></RelativeLayout>----------------------------------------------------------------------------------------// (layout)button_selector.xml<selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_pressed="true" android:drawable="@drawable/shape_yellow"/> <item android:state_focused="true" android:drawable="@drawable/shape_yellow"/> <item android:drawable="@drawable/shape_normal"/></selector>----------------------------------------------------------------------------------------// (layout)checkbox_selector.xml<selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@drawable/checkbox_checked" android:state_checked="true" /> <item android:drawable="@drawable/checkbox_focus" android:state_focused="true" /> <item android:drawable="@drawable/checkbox_normal"/></selector>----------------------------------------------------------------------------------------// (layout)edittext_selector.xml<selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_pressed="true" android:drawable="@drawable/shape_yellow"/> <item android:state_focused="true" android:drawable="@drawable/shape_yellow"/> <item android:drawable="@drawable/shape_normal"/></selector>----------------------------------------------------------------------------------------// (layout)recyclerview_bg.xml<selector xmlns:android="http://schemas.android.com/apk/res/android"> <item> <shape android:shape="rectangle"> <solid android:color="@color/colorAccent"/> <stroke android:width="1dp" android:color="@color/colorPrimaryDark"/> </shape> </item></selector>----------------------------------------------------------------------------------------// (layout)shape_yellow.xml<shape xmlns:android="http://schemas.android.com/apk/res/android"> <solid android:color="#D8E033"/> <corners android:radius="4dp"/> <stroke android:color="#2BA6E1" android:width="1dp"/></shape>逻辑代码
// MainActivityimport android.content.Context;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.util.Log;import android.view.View;import android.view.WindowManager;import android.widget.Toast;import com.google.gson.Gson;import com.google.gson.reflect.TypeToken;import java.util.List;public class MainActivity extends AppCompatActivity { private static final String TAG = "MainActivity"; private RecyclerView mRecyclerView; private Context mContext = MainActivity.this; private MyAdapter mMyAdapter; private int clickTime = 0; private List<PriceBean> mList; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // 解决一进入Activity就自动弹出虚拟键盘问题 getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN); setContentView(R.layout.activity_main); initView(); initData(); } private void initView() { mRecyclerView = (RecyclerView) findViewById(R.id.recyclerview); } public void initData(){ String jsonArr = "[\n" + " {\n" + " \"id\": \"250\",\n" + " \"name\": \"鲢鱼\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"629\",\n" + " \"name\": \"鳙鱼\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"603\",\n" + " \"name\": \"草鱼\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"180\",\n" + " \"name\": \"鲤鱼\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"138\",\n" + " \"name\": \"鲫鱼\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"631\",\n" + " \"name\": \"河蟹\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"685\",\n" + " \"name\": \"带鱼\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"142\",\n" + " \"name\": \"鲳鱼\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"136\",\n" + " \"name\": \"鲈鱼\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"181\",\n" + " \"name\": \"白鱼\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"957\",\n" + " \"name\": \"白鲢\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"359\",\n" + " \"name\": \"墨鱼\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"133\",\n" + " \"name\": \"鳊鱼\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"231\",\n" + " \"name\": \"泥鳅\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"137\",\n" + " \"name\": \"黄鳝\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"131\",\n" + " \"name\": \"黑鱼\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " \n" + " {\n" + " \"id\": \"009\",\n" + " \"name\": \"银鱼\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"050\",\n" + " \"name\": \"刀鱼\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"001\",\n" + " \"name\": \"河豚\",\n" + " \"is_forsale\": \"0\"\n" + " },\n" + " {\n" + " \"id\": \"100\",\n" + " \"name\": \"鳇鱼\",\n" + " \"is_forsale\": \"0\"\n" + " }\n" + "]"; Gson gson = new Gson(); mList = gson.fromJson( jsonArr , new TypeToken<List<PriceBean>>(){}.getType()); LinearLayoutManager linearLayoutManager = new LinearLayoutManager(mContext); linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL); mRecyclerView.setLayoutManager(linearLayoutManager); mMyAdapter = new MyAdapter(mList); // 设置item及item中控件的点击事件 mMyAdapter.setOnItemClickListener(onItemClickListener); mRecyclerView.setAdapter(mMyAdapter); } /** * Item点击监听。 */ private OnItemClickListener onItemClickListener = new OnItemClickListener() { @Override public void onItemClick(int position , View v) { switch (v.getId()){ case R.id.add: clickTime++; Toast.makeText(mContext , "增:" + position, Toast.LENGTH_SHORT).show(); // 添加一条空数据,并设置id为0,不特价 PriceBean priceBean = new PriceBean(); priceBean.setId("0"); priceBean.setIs_forsale("0"); priceBean.setName(""); mList.add(position + 1 , priceBean); mMyAdapter.notifyDataSetChanged(); Log.i(TAG , "mStrList:" + mList.toString()); break; case R.id.del: Toast.makeText(mContext, "删:" + position, Toast.LENGTH_SHORT).show(); mList.remove(position); mMyAdapter.notifyDataSetChanged(); break; case R.id.up: if(position == 0){ Toast.makeText(mContext, "已经在顶部,无法移动!:" + position, Toast.LENGTH_SHORT).show(); }else if(position > 0 && position <= mList.size()-1){ Toast.makeText(mContext, "上:" + position, Toast.LENGTH_SHORT).show(); swap(mList , position , position-1); mMyAdapter.notifyDataSetChanged(); } break; case R.id.down: if(position == mList.size()-1){ Toast.makeText(mContext, "已经在底部,无法移动!:" + position, Toast.LENGTH_SHORT).show(); }else if(position >= 0 && position < mList.size()-1){ Toast.makeText(mContext, "下:" + position, Toast.LENGTH_SHORT).show(); swap(mList , position , position+1); mMyAdapter.notifyDataSetChanged(); } break; } } }; /** * 集合中两个元素的交换操作 * @param list * @param oldPosition * @param newPosition * @param <T> */ public static <T> void swap(List<T> list, int oldPosition, int newPosition){ if(null == list){ throw new IllegalStateException("The list can not be empty..."); } T tempElement = list.get(oldPosition); // 向前移动，前面的元素需要向后移动 if(oldPosition < newPosition){ for(int i = oldPosition; i < newPosition; i++){ list.set(i, list.get(i + 1)); } list.set(newPosition, tempElement); } // 向后移动，后面的元素需要向前移动 if(oldPosition > newPosition){ for(int i = oldPosition; i > newPosition; i--){ list.set(i, list.get(i - 1)); } list.set(newPosition, tempElement); } }}----------------------------------------------------------------------------------------// MyAdapterimport android.support.v7.widget.RecyclerView;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.EditText;import android.widget.TextView;import com.yanzhenjie.recyclerview.swipe.SwipeMenuAdapter;import java.util.List;public class MyAdapter extends SwipeMenuAdapter<MyAdapter.MyViewHolder> { private static final String TAG = "MyAdapter"; private List<PriceBean> list; private OnItemClickListener mOnItemClickListener; public MyAdapter(List<PriceBean> mList){ this.list = mList; } public void setOnItemClickListener(OnItemClickListener onItemClickListener){ this.mOnItemClickListener = onItemClickListener; } @Override public View onCreateContentView(ViewGroup parent, int viewType) { return LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_item, parent, false); } @Override public MyAdapter.MyViewHolder onCompatCreateViewHolder(View realContentView, int viewType) { MyViewHolder myViewHolder = new MyViewHolder(realContentView); myViewHolder.mOnItemClickListener = mOnItemClickListener; return myViewHolder; } @Override public void onBindViewHolder(final MyAdapter.MyViewHolder holder, final int position) { // 取消条目复用 不取消复用CheckBox会有复用问题 holder.setIsRecyclable(false); holder.num.setText((position + 1) + ""); holder.data.setText(list.get(position).getName()); // 如果is_forsale为0,设置为不特价,如果is_forsale为1,设置为特价 if(list.get(position).getIs_forsale().equals("0")){ holder.isForsale.setChecked(false); Log.i(TAG, list.get(position).getName() + "不特价！"); }else if(list.get(position).getIs_forsale().equals("1")){ holder.isForsale.setChecked(true); Log.i(TAG, list.get(position).getName() + "特价！"); } holder.data.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if(!hasFocus){ Log.i(TAG, "EditText失去焦点"); // list中保存的是我焦点在EditText上移动后从EditText中获取的值 list.get(position).setName(holder.data.getText().toString().trim()); // EditText每失去一次焦点，就在list中保存一次 Log.i(TAG , "list" + list); } } }); holder.isForsale.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (isChecked) { // 选中的同时获取焦点 holder.isForsale.setFocusableInTouchMode(true); holder.isForsale.requestFocus(); } else { Log.i(TAG, "CheckBox取消选中"); } } }); holder.isForsale.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if (!hasFocus) { // CheckBox每失去一次焦点，就在list中保存一次 Log.i(TAG, "CheckBox失去焦点"); if (holder.isForsale.isChecked()) { list.get(position).setIs_forsale("1"); } else { list.get(position).setIs_forsale("0"); } Log.i(TAG , "list" + list); } } }); } @Override public int getItemCount() { return list == null ? 0 : list.size(); } class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener { OnItemClickListener mOnItemClickListener; TextView num; EditText data; CheckBox isForsale; TextView add; TextView del; TextView up; TextView down; MyViewHolder(View itemView) { super(itemView); num = (TextView) itemView.findViewById(R.id.num); data = (EditText) itemView.findViewById(R.id.data); isForsale = (CheckBox)itemView.findViewById(R.id.isForsale); add = (TextView) itemView.findViewById(R.id.add); del = (TextView) itemView.findViewById(R.id.del); up = (TextView) itemView.findViewById(R.id.up); down = (TextView) itemView.findViewById(R.id.down); add.setOnClickListener(this); del.setOnClickListener(this); up.setOnClickListener(this); down.setOnClickListener(this); } @Override public void onClick(View v) { if (mOnItemClickListener != null) { mOnItemClickListener.onItemClick(getAdapterPosition() , v); } } }}----------------------------------------------------------------------------------------// OnItemClickListenerimport android.view.View;public interface OnItemClickListener { void onItemClick(int position, View v);}----------------------------------------------------------------------------------------// PriceBeanpublic class PriceBean { private String id; private String name; private String is_forsale; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getIs_forsale() { return is_forsale; } public void setIs_forsale(String is_forsale) { this.is_forsale = is_forsale; } @Override public String toString() { return "PriceBean{" + "id='" + id + '\'' + ", name='" + name + '\'' + ", is_forsale='" + is_forsale + '\'' + '}'; }}注：
需要在project的build.gradle中添加：
compile 'com.yanzhenjie:recyclerview-swipe:1.0.4'compile 'com.google.code.gson:gson:2.4'Demo下载请移步：http://download.csdn.net/detail/zxc514257857/9895519
———-因本人才疏学浅，如博客或Demo中有错误的地方请大家随意指出，与大家一起讨论，共同进步，谢谢！———-
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