PopWindow的使用

方法1：
public PopupWindow pop=null;
public View pop_view;
--------------------
pop_view = getLayoutInflater().inflate(R.layout.list_pop, null,false);
pop= new
PopupWindow(pop_view,LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT,true);
popupWindow.setBackgroundDrawable(new BitmapDrawable());
lv_client_droplist = (ListView) popupWindow_view.findViewById(R.id.lv_client_droplist);
//popupWindow.showAtLocation(findViewById(R.id.parent), Gravity.CENTER| Gravity.CENTER, 0, 0);
--------------------private void dismissPopupWindow() {
if (popwindow != null && popwindows.isShowing()) {
popwindow.dismiss();
popwindow = null;
}
}
@Override
protected void onDestroy() {
super.onDestroy();
dismissPopupWindow();
}
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注意：
pop= new PopupWindow(pop_view,LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT,true);
可以换为：
pop= new PopupWindow(pop_view,-2,-2,true);
popupWindow.dismiss()方法只能关闭显示的窗口并不能释放内存，所以每show一次内存一直在增加。
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方法2：
private PopupWindow popwindow;
private View pop_view;
---------------
pop_view.setFocusable(true); //锁定后面界面
popwindow = new PopupWindow(pop_view,-2,-2,true);
popwindow.setAnimationStyle(R.style.PopupAnimation);
popwindow.setBackgroundDrawable(new BitmapDrawable());
popwindow.showAtLocation(findViewById(R.id.parent), Gravity.LEFT| Gravity.TOP, 10, 50);
popwindow.update();