先看效果图，免得浪费大家时间，看是不是想要的效果 。
直接上代码 ，核心方法。
[java] view plaincopy
- private void showPopupWindow(View parent) {
- if (popupWindow == null) {
- LayoutInflater layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
- view = layoutInflater.inflate(R.layout.group_list, null);
- lv_group = (ListView) view.findViewById(R.id.lvGroup);
- Collections.reverse(groups);
- GroupAdapter groupAdapter = new GroupAdapter(this, groups);
- lv_group.setAdapter(groupAdapter);
- popupWindow = new PopupWindow(view, 200, 220);
- }
- popupWindow.setFocusable(true);
- popupWindow.setOutsideTouchable(true);
- // 这个是为了点击“返回Back”也能使其消失，并且并不会影响你的背景
- popupWindow.setBackgroundDrawable(new BitmapDrawable());
- WindowManager windowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
- int xPos = -popupWindow.getWidth() / 2
- + getCustomTitle().getCenter().getWidth() / 2;
- popupWindow.showAsDropDown(parent, xPos, 4);
- lv_group.setOnItemClickListener(new OnItemClickListener() {
- @Override
- public void onItemClick(AdapterView<?> adapterView, View view,
- int position, long id) {
- loadNew(((StringItem)(groups.get(position))).getId());
- if (popupWindow != null)
- popupWindow.dismiss();
- }
- });
- }
这篇是转载的 。
popupWindow 在控件的各个方向上的显示（上、下、左、右），主要用到popupWindow 的showAtLocation(）方法：
在控件的上方：
- private void showPopUp(View v) {
- LinearLayout layout = new LinearLayout(this);
- layout.setBackgroundColor(Color.GRAY);
- TextView tv = new TextView(this);
- tv.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
- tv.setText("I'm a pop -----------------------------!");
- tv.setTextColor(Color.WHITE);
- layout.addView(tv);
- popupWindow = new PopupWindow(layout,120,120);
- popupWindow.setFocusable(true);
- popupWindow.setOutsideTouchable(true);
- popupWindow.setBackgroundDrawable(new BitmapDrawable());
- int[] location = new int[2];
- v.getLocationOnScreen(location);
- popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, location[0], location[1]-popupWindow.getHeight());
- }
在控件的其他方向上显示只需修改最后一行代码即可，如：
下方：popupWindow.showAsDropDown(v);
左边：
- popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, location[0]-popupWindow.getWidth(), location[1]);
右边：
- popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, location[0]+v.getWidth(), location[1]);