android program to draw grid view using canvas and paint methods

recently i wanted to draw a grids using canvas using draw line and paint method though working with canvas and java is new to me as i am from .NET C# background i did not find any samples on net on android after small R&D i was able to draw it using samples given in SDK, below is the sample code thought of posting it here in case if any body is looking for this

package testt.manju.com;

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.graphics.Paint.Style;
import android.os.Bundle;
import android.view.Display;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;

public class gridd extends Activity {
DemoView demoview;
int width = 0;
int height = 0;
int pass = 0;
int xpos = 0;
int ypos = 0;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
demoview = new DemoView(this);
setContentView(demoview);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
return super.onKeyDown(keyCode, event);
}

private class DemoView extends View {
public DemoView(Context context) {
super(context);
}

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);

// custom drawing code here
// remember: y increases from top to bottom
// x increases from left to right

Paint paint = new Paint();
paint.setStyle(Paint.Style.FILL);

// make the entire canvas white
paint.setColor(Color.TRANSPARENT);
canvas.drawPaint(paint);

Display display = getWindowManager().getDefaultDisplay();
width = display.getWidth();//start
height = display.getHeight();//end


xpos = width / 7;
ypos = height/7;
for (int i = 0; i < 7; i++) {

paint.setColor(Color.WHITE);
canvas.drawLine(xpos +(xpos*i), 0, xpos +(xpos*i), height, paint);
//canvas.drawLine(startX, startY, stopX, stopY, paint)

}
paint.setStyle(Style.STROKE);
for (int i = 0; i < 7; i++) {
paint.setColor(Color.WHITE);
canvas.drawLine(0, (ypos*pass)+ 5, width, (ypos*pass)+5, paint);
pass++;

}
}
}
}

If the above code is not working or if there is a better way of doing it please leave a comment and your suggestions will be helpful