Android: How to use the onDraw method in a class extending Activity?

Question

As a beginner, I\'ve been building a simple counter application using a simple layout xml and a class called \'Counter\', which derives (extends) from the class Activity.

Answer 1

Simple example using onDraw function-it requires class to extend view

Context to get the current activity context

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(new myview(this));


}

class myview extends View
{

    public myview(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
    }
    @Override
    protected void onDraw(Canvas canvas)
    {
        super.onDraw(canvas);
        int x=80;
        int y=80;
        int radius=40;
        Paint paint=new Paint();
        // Use Color.parseColor to define HTML colors
        paint.setColor(Color.parseColor("#CD5C5C"));
        canvas.drawCircle(x, y, radius, paint);
    }

}

}