Code example for PopupWindow

        onShow(); 
 
        if (background == null) {
            mWindow.setBackgroundDrawable(new BitmapDrawable());
        } else { 
            mWindow.setBackgroundDrawable(background);
        } 
 
        mWindow.setWidth(WindowManager.LayoutParams.WRAP_CONTENT);
        mWindow.setHeight(WindowManager.LayoutParams.WRAP_CONTENT);
        mWindow.setTouchable(true);
        mWindow.setFocusable(true);
        mWindow.setOutsideTouchable(true);
 
        mWindow.setContentView(root);
    } 
 
    public void setBackgroundDrawable(Drawable background) {
        this.background = background;
    } 
 
    public void setContentView(View root) {
        this.root = root;
        mWindow.setContentView(root);
    } 
 
    public void setContentView(int layoutResId) {
        LayoutInflater inflater = (LayoutInflater) mAnchor.getContext()
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        setContentView(inflater.inflate(layoutResId, null));
    } 
 
    public void showDropDown() { 
        showDropDown(0, 0); 
    } 
 
    public void showDropDown(int x, int y) {
        preShow(); 
        mWindow.setAnimationStyle(android.R.style.Animation_Dialog);
        mWindow.showAsDropDown(mAnchor, x, y);
    } 
 
    public void showLikeQuickAction() { 
        showLikeQuickAction(0, 0); 
    } 
 
    public void showLikeQuickAction(int x, int y) {
        preShow(); 
 
        mWindow.setAnimationStyle(android.R.style.Animation_Dialog);
        int[] location = new int[2];
        mAnchor.getLocationOnScreen(location);
 
        Rect anchorRect = new Rect(location[0], location[1], location[0]
                + mAnchor.getWidth(), location[1] + mAnchor.getHeight());
 
        root.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
                LayoutParams.WRAP_CONTENT));
        root.measure(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
 
        int rootW = root.getWidth(), rootH = root.getHeight();
        int screenW = mWManager.getDefaultDisplay().getWidth();
 
        int xpos = ((screenW - rootW) / 2) + x;
        int ypos = anchorRect.top - rootH + y;
 
        if (rootH > anchorRect.top) {
            ypos = anchorRect.bottom + y;
        } 
        mWindow.showAtLocation(mAnchor, Gravity.NO_GRAVITY, xpos, ypos);
    } 
 
    public void dismiss() { 
        mWindow.dismiss();
    }