PopupWindow弹出动态计算展示的位置，左、右、上、下对齐

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PopupWindow弹出动态计算展示的位置，左、右、上、下对齐

附上完整代码

public class PopupWindowUtil {    /**     * 计算出来的位置，y方向就在anchorView的上面和下面对齐显示，x方向就是与屏幕右边对齐显示     * 如果anchorView的位置有变化，就可以适当自己额外加入偏移来修正     *     * @param anchorView  呼出window的view     * @param contentView window的内容布局     * @return window显示的左上角的xOff, yOff坐标     */    public static int[] calculatePopWindowPos(final View anchorView, final View contentView) {        final int windowPos[] = new int[2];        final int anchorLoc[] = new int[2];        // 获取锚点View在屏幕上的左上角坐标位置        anchorView.getLocationOnScreen(anchorLoc);        final int anchorHeight = anchorView.getHeight();        final int anchorPaddingTop = anchorView.getPaddingTop();        // 获取屏幕的高宽        final int screenHeight = UIUtil.getScreenHeight();        final int screenWidth = UIUtil.getScreenWidth();        // 测量contentView        contentView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);        // 计算contentView的高宽        final int windowHeight = contentView.getMeasuredHeight();        final int windowWidth = contentView.getMeasuredWidth();        // 判断需要向上弹出还是向下弹出显示        final boolean isNeedShowUp = (screenHeight - anchorLoc[1] - anchorHeight < windowHeight);        if (isNeedShowUp) {            windowPos[0] = screenWidth - windowWidth;//向下            windowPos[1] = anchorLoc[1] - windowHeight + anchorHeight - anchorPaddingTop;        } else {            windowPos[0] = screenWidth - windowWidth;//向上            windowPos[1] = anchorLoc[1] + anchorHeight - anchorHeight + anchorPaddingTop;        }        return windowPos;    }    /**     * pop自动调整位置显示在左右两侧     *     * @param anchorView  呼出window的view     * @param contentView window的内容布局     * @return window显示的左上角的xOff, yOff坐标     */    public static int[] calculatePopWindow(final View anchorView, final View contentView) {        final int windowPos[] = new int[2];        final int anchorLoc[] = new int[2];        // 获取锚点View在屏幕上的左上角坐标位置        anchorView.getLocationOnScreen(anchorLoc);        final int anchorHeight = anchorView.getHeight();        final int anchorWidth = anchorView.getWidth();        final int anchorPaddingTop = anchorView.getPaddingTop();        final int anchorPaddingLeft = anchorView.getPaddingLeft();        // 获取屏幕的高宽        final int screenHeight = UIUtil.getScreenHeight();        final int screenWidth = UIUtil.getScreenWidth();        // 测量contentView        contentView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);        // 计算contentView的高宽        final int windowHeight = contentView.getMeasuredHeight();        final int windowWidth = contentView.getMeasuredWidth();        // 判断需要向上弹出还是向下弹出显示        final boolean isNeedShowUp = (screenHeight - anchorLoc[1] - anchorHeight < windowHeight);        if (isNeedShowUp) {            windowPos[0] = screenWidth - windowWidth;            windowPos[1] = anchorLoc[1] - windowHeight + anchorHeight - anchorPaddingTop;        } else {            windowPos[0] = screenWidth - windowWidth;            windowPos[1] = anchorLoc[1] + anchorHeight - anchorHeight + anchorPaddingTop;        }        boolean isRight = (screenWidth - anchorLoc[0] - anchorWidth > windowWidth);        int xOff = UIUtil.dip2px(20);//偏移量        if (isRight) {            windowPos[0] = anchorLoc[0] + anchorWidth + anchorPaddingLeft + xOff;//右        } else {            windowPos[0] = anchorLoc[0] - windowWidth - anchorPaddingLeft - xOff;//左        }        return windowPos;    }}

初始化PopupWindow

int windowPos[] = PopupWindowUtil.calculatePopWindowPos(iv, view);int xOff = UIUtil.dip2px(50);windowPos[0] -= xOff;popWindow.showAtLocation(iv, Gravity.TOP | Gravity.START, windowPos[0], windowPos[1]);

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