使用RecyclerView展示checkBox全选反选

最新推荐文章于 2024-04-09 03:27:12 发布

老伞czx

最新推荐文章于 2024-04-09 03:27:12 发布

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分类专栏： Android，recyclerview

本文链接：https://blog.youkuaiyun.com/PowerSen/article/details/78001721

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该博客展示了如何在Android应用中使用RecyclerView配合checkBox，实现在列表中进行全选和反选的功能。通过创建自定义Adapter和ViewHolder，以及设置点击事件来控制每个checkBox的状态，并更新视图。

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使用时一定要在builde.gradle文件里添加依赖：
compile 'com.android.support:recyclerview-v7:22.0.+'
======================================================
public class MainActivity extends AppCompatActivity {    private RecyclerView recyclerView;    private Button fanxuan;    private Button quanxuan;    private LinearLayoutManager layoutManager;    private myAdapter adapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        recyclerView = (RecyclerView) findViewById(R.id.recycleview);        quanxuan = (Button) findViewById(R.id.allcheck);        fanxuan = (Button) findViewById(R.id.fanxuan);        //在加载数据之前配置        layoutManager = new LinearLayoutManager(this);        recyclerView.setLayoutManager(layoutManager);        //适配器        adapter = new myAdapter();        recyclerView.setAdapter(adapter);        quanxuan.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                adapter.all();            }        });        fanxuan.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                adapter.Fanxuan();            }        });    }}
====================================================================
 public class myViewHolder extends RecyclerView.ViewHolder {
    public View view;
    public TextView textView;
    public CheckBox checkBox;

    public myViewHolder(View view ) {
        super(view);
        this.view = view;
        textView = (TextView) view.findViewById(R.id.textaaa);
        checkBox = (CheckBox) view.findViewById(R.id.checkbox);
    }
}
====================================================================
public class myAdapter extends RecyclerView.Adapter<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++) {
            list.add("Stronger Then I Was _" + 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 Fanxuan() {
        Set<Map.Entry<Integer, Boolean>> entrie = map.entrySet();
        for (Map.Entry<Integer, Boolean> entry : entrie) {
            entry.setValue(!entry.getValue());
        }
        notifyDataSetChanged();
    }

    //单选
    public void singleCheck(int position) {
        Set<Map.Entry<Integer, Boolean>> entrie = map.entrySet();
        for (Map.Entry<Integer, Boolean> entry : entrie) {
            entry.setValue(false);
        }
        map.put(position, true);
        notifyDataSetChanged();
    }

    @Override
    public myViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        RecyclerView.LayoutManager manager = ((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(myViewHolder holder, final int position) {
        holder.textView.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));
                notifyDataSetChanged();
                //单选
                singleCheck(position);
            }
        });
    }

    @Override
    public int getItemCount() {
        return list.size();
    }
}
=====================================================================

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.gss.jrtt.recyclerviewdemo.MainActivity">

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

        <Button
            android:id="@+id/allcheck"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="全选" />

        <Button
            android:id="@+id/fanxuan"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="反选" />
    </LinearLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycleview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></android.support.v7.widget.RecyclerView>
</LinearLayout>
==========================================================================
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">
    <CheckBox
        android:id="@+id/checkbox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <TextView
        android:id="@+id/textaaa"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Stronger Then I Was"/>
</LinearLayout>
</LinearLayout>
============================================================================