Android: how to set Activity view porgammatically

Here is how to do it


 @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      Log.d(TAG, "onCreate");

      puzzleView = new PuzzleView(this);
      setContentView(puzzleView);
      puzzleView.requestFocus();
   }

In the puzzle view, onSizeChanged can be implemented to get to know about the activity size changes.

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {

canvasHeight = Math.min(w,h);
canvasWidth = canvasHeight;
width = canvasWidth / 9f;
height = canvasHeight / 9f;

getRect(selX, selY, selRect);
Log.d(TAG, "onSizeChanged: width " + width + ", height " + height);
super.onSizeChanged(w, h, oldw, oldh);
}

override the draw method if need to paint something 

@Override

protected void onDraw(Canvas canvas) {

}