android获取控件宽高

@Override
    public void onWindowFocusChanged(boolean hasFocus)
    {
        super.onWindowFocusChanged(hasFocus);
        if (hasFocus)
        {
            int width = image.getMeasuredWidth();
            int height = image.getMeasuredHeight();
        }

    }

@Override
    protected void onStart()
    {
        super.onStart();

        image.post(new Runnable()
        {

            @Override
            public void run()
            {
                int width = image.getMeasuredWidth();
                int height = image.getMeasuredHeight();  
            }
        });
    }

ViewTreeObserver observer = image.getViewTreeObserver();
        observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener()
        {

            @Override
            public void onGlobalLayout()
            {
                image.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                int width = image.getMeasuredWidth();
                int height = image.getMeasuredHeight();
            }
        });