package com.example.myhello;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Paint.Style;import android.graphics.Rect;import android.graphics.RectF;import android.util.AttributeSet;import android.view.View;public class MyView extends View{	public MyView(Context context,AttributeSet attrs){		super(context,attrs);	}	protected void onDraw(Canvas canvas){		canvas.drawColor(Color.WHITE);		Paint paint = new Paint();		paint.setColor(Color.BLUE);		canvas.drawCircle(50, 50, 30, paint);		paint.setColor(Color.BLACK);		canvas.drawRect(80,20,160,80,paint);		Rect rect = new Rect();		rect.set(180,20,300,80);				canvas.drawRect(rect, paint);		paint.setStyle(Style.STROKE);		paint.setColor(Color.RED);		paint.setTextSize(20);		canvas.drawText("hello", 10, 108, paint);		paint.setColor(Color.BLACK);		canvas.drawLine(10, 120, 300, 120, paint);		RectF oval = new RectF();		oval.set(10.0f,140.0f,108.0f,200.0f);		canvas.drawOval(oval, paint);		oval = new RectF();		oval.set(150.0f,140.0f,210.0f,200.0f);		canvas.drawArc(oval, 150.0f, 140.0f, true, paint);	}}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent" >	<com.example.myhello.MyView	    android:id="@+id/myview"	    android:layout_width="fill_parent"	    android:layout_height="fill_parent"/></LinearLayout>