"Android" gets the width and height of the control

Sometimes we need to get the width and height of the controls in the activity to do some work, here are three ways to get the width and height:

1. onwindowfocuschanged

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

2. Post mode

  @Override  protected  void  onstart  () {super . OnStart (); Image.post (new  Runnable () { @Override public  void  r Un  () {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 (). Remov                Eglobalonlayoutlistener (
     this );                
     int  width = image.getmeasuredwidth ();                
     int  height = image.getmeasuredheight (); Toast.maketext (Mainactivity.
      This , 
      "Onglobal--width ="  + width + 
      "---height =" 
       + height, toast.length_short). Show (); }        });
    

Note: The above image is the ImageView control

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

"Android" gets the width and height of the control