listView和checkbox实现单选，多选最简便方法

最新推荐文章于 2021-05-26 00:34:46 发布

翻译最新推荐文章于 2021-05-26 00:34:46 发布 · 754 阅读

文章标签：

#android #checkbox #listview #单选按钮

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本文介绍了一种在Android应用中实现自定义ListView的方法，通过创建自定义Adapter和View来显示带有复选框和文本的数据项，并提供了在Activity中设置ListView及获取选中项的示例代码。

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我的adapter

public class SingleAdapter extends BaseAdapter {

    Context context;
    private ArrayList<String> groups;

    public SingleAdapter(Context context, ArrayList<String> groups) {
        this.context = context;
        this.groups = groups;
    }

    @Override
    public int getCount() {
        return groups.size();
    }

    @Override
    public Object getItem( int position) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public long getItemId( int position) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public View getView( final int position, View convertView,
                         ViewGroup parent) {
        final SingleView singleView = new SingleView(context);
        singleView.setTitle(groups.get(position));
        return singleView;

    }

}

自定义控件

public class SingleView extends LinearLayout implements Checkable {

    private TextView mText;
    private CheckBox mCheckBox;

    public SingleView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        initView(context);
    }

    public SingleView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initView(context);
    }

    public SingleView (Context context) {
        super(context);
        initView(context);
    }

    private void initView(Context context){
        // 填充布局
        LayoutInflater inflater = LayoutInflater.from(context);
        View v = inflater.inflate(R.layout.list_adapter ,this);
        mText = (TextView) v.findViewById(R.id.tv_zxing_section_sequence);
        mCheckBox = (CheckBox) v.findViewById(R.id.item_cb_section);
    }

    @Override
    public void setChecked( boolean checked) {
        mCheckBox.setChecked(checked);
    }

    @Override
    public boolean isChecked() {
        return mCheckBox.isChecked();
    }

    @Override
    public void toggle() {
        mCheckBox.toggle();
    }

    public void setTitle(String text){
        mText.setText(text);
    }

}

自定义控件加载的布局文件list_adapter

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <CheckBox
        android:id="@+id/item_cb_section"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:focusable="false"
        android:focusableInTouchMode="true"
        android:clickable="false"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="5dp" />

    <TextView
        android:id="@+id/tv_zxing_section_sequence"
        android:layout_width="50dp"
        android:layout_height="wrap_content"
        android:textSize="16sp" />
</LinearLayout>

activity里面的代码

public class ActivityOne extends Activity {

    private ArrayList<String> groups;
    private ListView listView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
         setContentView(R.layout.layout_one);
         listView = (ListView) findViewById(R.id.listView);

        groups = new ArrayList<String>();
        groups.add( "11");
        groups.add( "22");
        groups.add( "33");
        groups.add( "44");
        groups.add( "55");
        groups.add( "66");
        groups.add( "77");
        groups.add( "88");
        groups.add( "99");
        groups.add( "00");

        SingleAdapter singleAdapter = new SingleAdapter(this,groups);
        listView.setAdapter(singleAdapter);

}

如何需要获取已选中的项；则在actvity调用此方法

private void PickNum() {
    int position = listView.getCheckedItemPosition();
    if (ListView. INVALID_POSITION != position) {
        Toast. makeText(this, groups.get(position), Toast.LENGTH_SHORT).show();
    }
}