Android 在线性布局内制作ChatHead视图

我正在尝试将onTouchListener添加到imageButton中，使其像chatHead一样移动，正如我们在

facebook

中看到的那样

但是当我将它们添加到LinearLayout或RelativeLayout时，它们的参数没有像WindowManager那样的x、y属性

但它在WindowManger中工作。看

chatHead = new ImageView(this);
chatHead.setImageResource(R.drawable.face1);

params= new WindowManager.LayoutParams(
    WindowManager.LayoutParams.WRAP_CONTENT,
    WindowManager.LayoutParams.WRAP_CONTENT,
    WindowManager.LayoutParams.TYPE_PHONE,
    WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
    PixelFormat.TRANSLUCENT);

params.gravity = Gravity.TOP | Gravity.LEFT;
params.x = 0;
params.y = 100;

//this code is for dragging the chat head
chatHead.setOnTouchListener(new View.OnTouchListener() {
    private int initialX;
    private int initialY;
    private float initialTouchX;
    private float initialTouchY;

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            initialX = params.x;
            initialY = params.y;
            initialTouchX = event.getRawX();
            initialTouchY = event.getRawY();
            return true;
        case MotionEvent.ACTION_UP:
            return true;
        case MotionEvent.ACTION_MOVE:
            params.x = initialX
                + (int) (event.getRawX() - initialTouchX);
            params.y = initialY
                + (int) (event.getRawY() - initialTouchY);
            windowManager.updateViewLayout(chatHead, params);
            return true;
        }
        return false;
    }
});
windowManager.addView(chatHead, params);

或者有没有办法将上页边距添加到WindowManager。这样，

chatfead

就可以在

指定的视图下工作。我想在屏幕顶部添加一个按钮。聊天室的头不能重叠。但我找不到一种方法将其添加到按钮下