android 之popupWindow 在指定位置上的显示

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：

[java]
view plaincopy

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：

[java]
view plaincopy

popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, location[0]-popupWindow.getWidth(), location[1]);

右边：

[html]
view plaincopy

popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, location[0]+v.getWidth(), location[1]);

转自：http://blog.csdn.net/dxj007/article/details/8026691