Draw circle on canvas, canvas.drawCircle()

Create a new class MyView extends View. Override the onDraw(Canvas canvas) method to draw circle on Canvas.

package com.AndroidMyCanvas;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.util.AttributeSet;
import android.view.View;

public class MyView extends View {

Paint paint;
Path path;

public MyView(Context context) {
 super(context);
 init();
}

public MyView(Context context, AttributeSet attrs) {
 super(context, attrs);
 init();
}

public MyView(Context context, AttributeSet attrs, int defStyle) {
 super(context, attrs, defStyle);
 init();
}

private void init(){
 paint = new Paint();
 paint.setColor(Color.BLUE);
 paint.setStrokeWidth(10);
 paint.setStyle(Paint.Style.STROKE);

}

@Override
protected void onDraw(Canvas canvas) {
 // TODO Auto-generated method stub
 super.onDraw(canvas);

 paint.setStyle(Paint.Style.STROKE);
 canvas.drawCircle(50, 50, 30, paint);

 paint.setStyle(Paint.Style.FILL);
 canvas.drawCircle(300, 300, 200, paint);
 //drawCircle(cx, cy, radius, paint)

}

}

Modify main Java activity to setContentView() using our custom View, MyView.

package com.AndroidMyCanvas;

import android.app.Activity;
import android.os.Bundle;

public class AndroidMyCanvasActivity extends Activity {
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(new MyView(this));
 }
}