android 之popupWindow 在指定位置上的显示 .

来源:互联网 发布:金山毒霸数据恢复 编辑:程序博客网 时间:2024/05/17 03:36

这篇文章主要介绍了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]);


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