其中，使用了自定义的MyView类，在MyView类中，重写了onDraw()函数，并定义几种不同的画笔，分别用来绘制各种颜色的奥运五环以及绘制字符串“北京欢迎您”等。具体的MyView.java源代码如下。

Android_OlympicLogo的MyView.java源代码

1 package com.example.android_olympiclogo; android.view.View; 4 import android.content.Context; 5 import android.graphics.BitmapFactory; 6 import android.graphics.Canvas; 7 import android.graphics.Color; 8 import android.graphics.Paint; 9 import android.graphics.Paint.Style; MyView extends View { MyView(Context context) { 14 super(context); 15 } onDraw(Canvas canvas) { paint_blue.setColor(Color.BLUE); 21 paint_blue.setStyle(Style.STROKE); 22 paint_blue.setStrokeWidth(10); 23 canvas.drawCircle(110,150,60,paint_blue); paint_yellow.setColor(Color.YELLOW); 27 paint_yellow.setStyle(Style.STROKE); 28 paint_yellow.setStrokeWidth(10); 29 canvas.drawCircle((float)175.5, 210, 60, paint_yellow); paint_black.setColor(Color.BLACK); 33 paint_black.setStyle(Style.STROKE); 34 paint_black.setStrokeWidth(10); 35 canvas.drawCircle(245, 150, 60, paint_black); paint_green.setColor(Color.GREEN); 39 paint_green.setStyle(Style.STROKE); 40 paint_green.setStrokeWidth(10); 41 canvas.drawCircle(311, 210, 60, paint_green); paint_red.setColor(Color.RED); 45 paint_red.setStyle(Style.STROKE); 46 paint_red.setStrokeWidth(10); 47 canvas.drawCircle(380, 150, 60, paint_red); paint_string.setColor(Color.BLUE); 51 paint_string.setTextSize(20); 52 canvas.drawText("Welcome to Beijing", 245, 310, paint_string); paint_line.setColor(Color.BLUE); 56 canvas.drawLine(240, 310, 425, 310, paint_line); paint_text.setColor(Color.BLUE); 60 paint_text.setTextSize(20); 61 canvas.drawText("北京欢迎您", 275, 330, paint_text); canvas.drawBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.fuwa), 35, 340, paint_line); 65 } 66 }

　　此外，还需要将自定义的MyView视图显示到手机屏幕上，所以需要在MainAcitivity.java中加载MyView视图，可以使用setContentView()方法，具体的MainAcitivity.java源代码如下。

Android_OlympicLogo的MainActivity.java源代码

1 package com.example.android_olympiclogo; android.os.Bundle; 4 import android.app.Activity; 5 import android.view.Menu; 6 import android.view.MenuItem; 7 import android.support.v4.app.NavUtils; MainActivity extends Activity { 10 11 @Override onCreate(Bundle savedInstanceState) { 13 super.onCreate(savedInstanceState); setContentView( } 17 18 @Override onCreateOptionsMenu(Menu menu) { 20 getMenuInflater().inflate(R.menu.activity_main, menu); ; 22 } 23 24 }

 　　当然了，还需要将福娃的图片放在res下的drawable-hdpi目录下。这样才可以使用BitmapFactory.decodeResource(getResources(),R.drawable.fuwa)方法加载该图片。