自定义单选ListView

最新推荐文章于 2024-04-26 18:22:28 发布

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本文介绍了一种实现自定义Checkable功能的ListView的方法。通过创建继承LinearLayout并实现Checkable接口的ChoiceView组件，配合ArrayAdapter使用，实现了ListView的单项选择功能。

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1.item布局实现Checkable接口

public class ChoiceView extends LinearLayout implements Checkable {

    TextView tvRepeatTitle;
    ImageView ivCheckIcon;

    public ChoiceView(Context context) {
        super(context);
        View.inflate(context, R.layout.item_repeat_item, this);
        tvRepeatTitle = (TextView) findViewById(R.id.tv_repeat_title);
        ivCheckIcon = (ImageView) findViewById(R.id.iv_check_icon);
    }

    public void setText(String text) {
        tvRepeatTitle.setText(text);
    }

    @Override
    public void setChecked(boolean checked) {
        if (checked) {
            ivCheckIcon.setVisibility(View.VISIBLE);
        } else {
            ivCheckIcon.setVisibility(View.INVISIBLE);
        }
    }

    @Override
    public boolean isChecked() {
        return ivCheckIcon.getVisibility() == VISIBLE;
    }

    @Override
    public void toggle() {
        Log.w("ChoiceView", "toggle()");
    }
}

2.将ListView设置为CHOICE_MODE_SINGLE

lvRepeat.setChoiceMode(AbsListView.CHOICE_MODE_SINGLE);
ListAdapter listAdapter = new ArrayAdapter<String>(this, R.layout.item_repeat_item, repeatArray) {
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        final ChoiceView view;
        if (convertView == null) {
            view = new ChoiceView(getApplicationContext());
        } else {
            view = (ChoiceView) convertView;
        }
        view.setText(getItem(position));
        return view;
    }
};
lvRepeat.setAdapter(listAdapter);