1.在AndroidManfest.xml文件中加入以下红色代码：

  <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="cn.itcast.db"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
         <uses-library android:name="android.test.runner" />
        <activity android:name=".MainActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
    <uses-sdk android:minSdkVersion="8" />
<instrumentation android:name="android.test.InstrumentationTestRunner"
  android:targetPackage="cn.itcast.db" android:label="Tests for My App" />
</manifest>

2. 在测试类中extends AndroidTestCase

http://blog.csdn.net/wl_ldy

MPMusicPlayerController *ipodMusicPlayer = [MPMusicPlayerController iPodMusicPlayer];
    [ipodMusicPlayer beginGeneratingPlaybackNotifications];
    [[NSNotificationCenter defaultCenter] addObserver:self 
                                             selector:@selector(trackTheDeviceVolume:) 
                                                 name:MPMusicPlayerControllerVolumeDidChangeNotification 
                                               object:nil];