控件在坐标中的位置

 private int[] mHistoryDisplayButtonLocation;
 private int mHistoryDisplayButtonLocationX;
 private int mHistoryDisplayButtonLocationY;


mHistoryDisplayButtonLocation = new int[2];
mHistoryDisplayButton.getLocationOnScreen(mHistoryDisplayButtonLocation);
mHistoryDisplayButtonLocationX = mHistoryDisplayButtonLocation[0];
mHistoryDisplayButtonLocationY = mHistoryDisplayButtonLocation[1];