popupwindow与listview结合使用时，点击后退键无效问题

来源：互联网发布：mysql 联合唯一键用法编辑：程序博客网时间：2024/05/31 13:14

以下是popupwindow和listview结合使用的例子：

使用的参数说明

Context context, 上下文

ArrayList<String> mServicesName, listview显示的数据

TextView mSelectServiceTextView, 控件

final PopupWindowOnItemClickListener postService listview点击时，触发监听器

//创建一个和mSelectServiceTextView宽度一样大小的listview

ListView listView = new ListView(context);
       listView.setLayoutParams(new LayoutParams(mSelectServiceTextView.getWidth(), LayoutParams.WRAP_CONTENT));
       ArrayList<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>();
       for (String mServiceName : mServicesName) {
           HashMap<String, Object> map = new HashMap<String, Object>();
           map.put("coin_service", mServiceName);
           list.add(map);
       }
       String[] from = new String[]{"coin_service"};
       int[] to = new int[]{R.id.coin_service};
       SimpleAdapter adapter = new SimpleAdapter(context, list, R.layout.item_coin_service, from, to);
       listView.setAdapter(adapter);
       listView.setFocusableInTouchMode(true);
        listView.setFocusable(true);
       listView.setBackgroundColor(new Color().WHITE);
       listView.setOnItemClickListener(new AdapterView.OnItemClickListener(){
           @Override
           public void onItemClick(AdapterView<?> parent, View view,
                   int position, long id) {
               postService.postItem(position);
           }});

//创建一个装listview的popupwindow
final PopupWindow popupWindow = new PopupWindow(listView, mSelectServiceTextView.getWidth(), LayoutParams.WRAP_CONTENT);

        popupWindow.setBackgroundDrawable(new BitmapDrawable());
       popupWindow.showAsDropDown(mSelectServiceTextView, 0, 0);
       //使其聚集   必须要设置为true，不然listview将无法获取焦点
        popupWindow.setFocusable(true);
        //设置允许在外点击消失
        popupWindow.setOutsideTouchable(true);
        //刷新状态
        popupWindow.update();

public interface PopupWindowOnItemClickListener {
public void postItem(int position);
}

这过程中，会发现，当popupwindow显示时，后退键和其他控件的点击事件失效掉，此时以下方法能解决问题：

popupWindow.setBackgroundDrawable(new BitmapDrawable()); //这句能解决后退键失效问题

希望能解决你的问题，谢谢！

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