[Android] Get the width and height of the control

[Android] Get the width and height of the control
Sometimes we need to obtain the width and height of the control during Activity for some operations. The following describes three methods to obtain the width and height: 1. onWindowFocusChanged

@Override    public void onWindowFocusChanged(boolean hasFocus)    {        super.onWindowFocusChanged(hasFocus);        if (hasFocus)        {            int width = image.getMeasuredWidth();            int height = image.getMeasuredHeight();            Toast.makeText(MainActivity.this, "width = " + width + "---height = " + height, Toast.LENGTH_SHORT).show();        }    }

2. post Method

 @Override    protected void onStart()    {        super.onStart();        image.post(new Runnable()        {            @Override            public void run()            {                int width = image.getMeasuredWidth();                int height = image.getMeasuredHeight();                Toast.makeText(MainActivity.this, "onstart--width = " + width + "---height = " + height, Toast.LENGTH_SHORT).show();            }        });    }

3. ViewTreeObserver

 ViewTreeObserver observer = image.getViewTreeObserver();        observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener()        {            @Override            public void onGlobalLayout()            {                image.getViewTreeObserver().removeGlobalOnLayoutListener(this);                int width = image.getMeasuredWidth();                int height = image.getMeasuredHeight();                Toast.makeText(MainActivity.this, "onglobal--width = " + width + "---height = " + height, Toast.LENGTH_SHORT).show();            }        });

Note: The image above is an ImageView control.

ImageView image = (ImageView)findViewById(R.id.image);