本文实例为大家分享了CheckBox全选、反选、单选的具体代码，供大家参考，具体内容如下
MainActiivity
package com.bwie.day06; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.view.View; import com.bwie.day06.myadapter.MyAdapter; public class MainActivity extends AppCompatActivity { private MyAdapter myAdapter; private LinearLayoutManager linearLayoutManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //初始化控件 RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerview); //在加载数据之前配置 linearLayoutManager = new LinearLayoutManager(this); recyclerView.setLayoutManager(linearLayoutManager); //创建一个适配器 myAdapter = new MyAdapter(); recyclerView.setAdapter(myAdapter); } public void btnAll(View view) { myAdapter.All(); } public void btnner(View view) { myAdapter.neverall(); } }
Adapter
package com.bwie.day06.myadapter; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.CheckBox; import android.widget.TextView; import com.bwie.day06.R; import java.util.ArrayList; import java.util.HashMap; import java.util.Map; import java.util.Set; public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> { //这个是checkbox的Hashmap集合 private final HashMap<Integer, Boolean> map; //这个是数据集合 private final ArrayList<String> list; public MyAdapter() { map = new HashMap<>(); list = new ArrayList<>(); for (int i = 0; i < 30; i++) { //添加30条数据 list.add("这是条目" + i); map.put(i, false); } } /** * 全选 */ public void All() { Set<Map.Entry<Integer, Boolean>> entries = map.entrySet(); boolean shouldall = false; for (Map.Entry<Integer, Boolean> entry : entries) { Boolean value = entry.getValue(); if (!value) { shouldall = true; break; } } for (Map.Entry<Integer, Boolean> entry : entries) { entry.setValue(shouldall); } notifyDataSetChanged(); } /** * 反选 */ public void neverall() { Set<Map.Entry<Integer, Boolean>> entries = map.entrySet(); for (Map.Entry<Integer, Boolean> entry : entries) { entry.setValue(!entry.getValue()); } notifyDataSetChanged(); } /** * 单选 * * @param postion */ public void singlesel(int postion) { Set<Map.Entry<Integer, Boolean>> entries = map.entrySet(); for (Map.Entry<Integer, Boolean> entry : entries) { entry.setValue(false); } map.put(postion, true); notifyDataSetChanged(); } //这里主要初始化布局控件 @Override public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { RecyclerView.LayoutManager layoutManager = ((RecyclerView) parent).getLayoutManager(); //初始化布局文件 View inflate = LayoutInflater.from(parent.getContext()).inflate(R.layout.check, parent, false); return new MyViewHolder(inflate); } @Override public void onBindViewHolder(final MyViewHolder holder, final int position) { //放入集合中的值 holder.txt.setText(list.get(position)); holder.checkBox.setChecked(map.get(position)); holder.checkBox.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { map.put(position, !map.get(position)); //刷新适配器 notifyDataSetChanged(); //单选 // singlesel(position); } }); } @Override public int getItemCount() { return list.size(); } public class MyViewHolder extends RecyclerView.ViewHolder { View itemView; private TextView txt; private CheckBox checkBox; //初始化控件 public MyViewHolder(View itemView) { super(itemView); this.itemView = itemView; txt = (TextView) itemView.findViewById(R.id.txt); checkBox = (CheckBox) itemView.findViewById(R.id.cbox); } } }
main.xml
<LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <Button android:onClick="btnAll" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:text="全选" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:text="反选" android:onClick="btnner"/> </LinearLayout> <android.support.v7.widget.RecyclerView android:id="@+id/recyclerview" android:layout_width="match_parent" android:layout_height="match_parent"></android.support.v7.widget.RecyclerView>
Check.xml
<CheckBox android:id="@+id/cbox" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <TextView android:text="dfdfdfdf" android:id="@+id/txt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="20sp" />
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。