Implementing a customized drawable in Android
<p>I was trying to get hold of 2D graphics in Android.
  As a example i want to implement a custom drawable and show it in my Activity</p>

<p>I have defined a customized drawable by extending from Android drawable as mentioned below</p>

<pre><code>myDrawable extends Drawable {

 private static final String TAG = myDrawable.class.getSimpleName();
 private ColorFilter cf;
 @Override
 public void draw(Canvas canvas) {


  //First you define a colour for the outline of your rectangle

  Paint rectanglePaint = new Paint();
  rectanglePaint.setARGB(255, 255, 0, 0);
  rectanglePaint.setStrokeWidth(2);
  rectanglePaint.setStyle(Style.FILL);

  //Then create yourself a Rectangle
  RectF rectangle = new RectF(15.0f, 50.0f, 55.0f, 75.0f); //in pixels


  Log.d(TAG,"On Draw method");
  // TODO Auto-generated method stub
  Paint paintHandl = new Paint();
//  paintHandl.setColor(0xaabbcc);
  paintHandl.setARGB(125, 234, 213, 34 );
  RectF rectObj = new RectF(5,5,25,25);
  canvas.drawRoundRect(rectangle, 0.5f, 0.5f, rectanglePaint);

 }

 @Override
 public int getOpacity() {
  // TODO Auto-generated method stub
  return 100;
 }

 @Override
 public void setAlpha(int alpha) {
  // TODO Auto-generated method stub

 }

 @Override
 public void setColorFilter(ColorFilter cf) {
  // TODO Auto-generated method stub
  this.cf = cf;

 }


}
</code></pre>

<p>I am trying to get this displayed in my activity, as shown below</p>

<pre><code>public class custDrawable extends Activity {
/** Called when the activity is first created. */


 LinearLayout layObj = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        layObj = (LinearLayout) findViewById(R.id.parentLay);
        ImageView imageView = (ImageView) findViewById(R.id.icon2);
        myDrawable myDrawObj = new myDrawable();
        imageView.setImageDrawable(myDrawObj);
        imageView.invalidate();
//  layObj.addView(myDrawObj, params);

    }
}
</code></pre>

<p>But when i run the app i see no rectangle on the activity, can anyone help me out?
Where am i going wrong?</p>
