/*** 计算mView在view周围的位置** @param view** @param mMargin mView与view或边界的间距*    *     titleBarHeight 标题栏的高度*   mContext当前的Activity*/private void aroundView(View view, float mMargin) {if (view == null) {return;}boolean showLeft;boolean showRight;boolean showUp;boolean showDown;if (titleBarHeight == 0) {Rect frame = new Rect();((Activity) mContext).getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);int statusBarHeight = frame.top;int contentTop = ((Activity) mContext).getWindow().findViewById(Window.ID_ANDROID_CONTENT).getTop();titleBarHeight = contentTop - statusBarHeight;}int width = mView.getWidth();//如果Params获取不到长宽，就在Dialog显示之后获取长宽int height = mView.getHeight();android.view.ViewGroup.LayoutParams lp = mView.getLayoutParams();if(lp!=null){ //主要以这步计算长宽为主，如果获取不到再退而求其次width = lp.width;height = lp.height;}if(width == 0 && height == 0){//如果两种方法都获取不到长宽，则默认给一个值，下次用getWidth获得width = (int) (mWinWidth/2 - mMargin);height = (int) (mWinheight/2 - mMargin);}showLeft = showRight = showUp = showDown = false;if ((view.getX() - mMargin) >= width) {//左showLeft = true;showRight = false;}if ((mWinWidth - view.getX() - mMargin) >= width) {//右showLeft = false;showRight = true;}if ((view.getY() - mMargin) >= height) {//上showUp = true;showDown = false;}if ((mWinheight - view.getY() - mMargin) >= height) {//下showUp = false;showDown = true;}// 根据计算，设置坐标if (showLeft) {mView.setX(view.getX() + view.getWidth() - width - mMargin);} else if (showRight) {mView.setX(view.getX() + mMargin);} else {mView.setX(mWinWidth - mMargin - width);}// 根据计算，设置坐标if (showLeft) {mView.setX(view.getX() + view.getWidth() - width - mMargin);} else if (showRight) {mView.setX(view.getX() + mMargin);} else {mView.setX(mWinWidth - mMargin - width);//如果宽度偏大，则右对齐}if (showUp) {mView.setY(view.getY() - height + titleBarHeight - mMargin);} else if (showDown) {mView.setY((view.getY() + view.getHeight()) + titleBarHeight+ mMargin);} else {//如果高度偏大，在下面显示mView.setY((view.getY() + view.getHeight()) + titleBarHeight+ mMargin);}}

本博客原地址:http://my.oschina.net/reone/blog/533426