Draw a line in Android

package com.ugrowit; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.view.View; public class DrawView extends View {       Paint paint = new Paint();       public DrawView(Context context) {                         super(context);             paint.setColor(Color.BLUE);                   }       @Override       public void onDraw(Canvas canvas) {                         canvas.drawLine(0, 0, getWidth(), getHeight(), paint);                               } }

package com.ugrowit; import android.app.Activity; import android.graphics.Color; import android.os.Bundle; public class DrawLineDemo extends Activity {       DrawView drawView;           @Override     public void onCreate(Bundle savedInstanceState) {               super.onCreate(savedInstanceState);                 drawView = new DrawView(this);         drawView.setBackgroundColor(Color.WHITE);         setContentView(drawView);             } }