Android自定义PopupWindow简单小例子

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent">

  <ListView
    android:id="@+id/pop_path"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
  </ListView>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent">
  <TextView
    android:id="@+id/item_content"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="18dp"/>
</LinearLayout>

public class PopAdapter extends BaseAdapter {

  private List<String> list;
  private Context context;

  public PopAdapter(List<String> list, Context context) {
    this.list = list;
    this.context = context;
  }

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

  @Override
  public Object getItem(int position) {
    return position;
  }

  @Override
  public long getItemId(int position) {
    return position;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder viewHolder;
    if (convertView == null) {
      viewHolder = new ViewHolder();
      convertView = LayoutInflater.from(context).inflate(R.layout.pop_list_adapter, null);
      viewHolder.item_content = (TextView) convertView.findViewById(R.id.item_content);
      convertView.setTag(viewHolder);
    } else {
      viewHolder = (ViewHolder) convertView.getTag();
    }
    viewHolder.item_content.setText(list.get(position));

    return convertView;
  }

  private class ViewHolder {
    private TextView item_content;
  }
}

public class MyPopuWindow extends PopupWindow {
  private View contentView;
  private ListView lv_pop;
  private List<String> paths;
  private Context context;

  public MyPopuWindow(final Activity context) {
    this.context = context;

    //获得 LayoutInflater 的实例
    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    contentView = inflater.inflate(R.layout.fragment_popup, null);

    //获取屏幕的宽高
    int h = context.getWindowManager().getDefaultDisplay().getHeight();
    int w = context.getWindowManager().getDefaultDisplay().getWidth();
    this.setContentView(contentView);
    // 设置SelectPicPopupWindow弹出窗体的宽
    this.setWidth(LayoutParams.MATCH_PARENT);
    // 设置SelectPicPopupWindow弹出窗体的高
    this.setHeight(LayoutParams.WRAP_CONTENT);
    // 设置SelectPicPopupWindow弹出窗体可点击
    this.setFocusable(true);
    this.setOutsideTouchable(true);
    // 刷新状态
    this.update();
    // 实例化一个ColorDrawable颜色为半透明
    ColorDrawable dw = new ColorDrawable(0000000000);
    // 点back键和其他地方使其消失,设置了这个才能触发OnDismisslistener ，设置其他控件变化等操作
    this.setBackgroundDrawable(dw);
    // 设置SelectPicPopupWindow弹出窗体动画效果
    this.setAnimationStyle(R.style.AnimationPreview);
    initData();
  }

  private void initData() {
    paths = new ArrayList<>();
    paths.add("北京");
    paths.add("上海");
    paths.add("广州");
    paths.add("天津");
    paths.add("大连");
    paths.add("长春");
    paths.add("济南");
    paths.add("青岛");
    paths.add("无锡");
    paths.add("郑州");
    paths.add("宁波");
    paths.add("厦门");
    lv_pop = (ListView) contentView.findViewById(R.id.pop_path);
    lv_pop.setAdapter(new PopAdapter(paths, context));
    lv_pop.setOnItemClickListener(new AdapterView.OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        Toast.makeText(context, paths.get(position), Toast.LENGTH_SHORT).show();
        showPopupWindow(view);
      }
    });
  }

  /**
   * 显示popupWindow
   *
   * @param parent
   */
  public void showPopupWindow(View parent) {
    if (!this.isShowing()) {
      // 以下拉方式显示popupwindow
      this.showAsDropDown(parent, parent.getLayoutParams().width / 2, 18);
    } else {
      this.dismiss();
    }
  }

}

myPopuWindow= new MyPopuWindow(getActivity());
myPopuWindow.showPopupWindow(actionPath);