public class TestAudio extends AndroidTestCase { 
    private AudioManager mAudioManager; 
    private boolean mUseFixedVolume; 
    private final static long TIME_TO_PLAY = 2000; 
    private final static int MP3_TO_PLAY = R.raw.testmp3; 
     
    @Override 
    protected void setUp() throws Exception { 
        // TODO Auto-generated method stub 
        super.setUp(); 
         
    } 
     
    public void testmp3(){ 
        MediaPlayer mp = MediaPlayer.create(mContext, MP3_TO_PLAY); 
        mp.setAudioStreamType(STREAM_MUSIC); 
        mp.setLooping(true); 
        mp.start(); 
        try { 
            Thread.sleep(20*1000); 
        } catch (InterruptedException e) { 
            // TODO Auto-generated catch block 
            e.printStackTrace(); 
        } 
    } 
} 

<uses-library android:name="android.test.runner" />

<instrumentation
        android:name="android.test.InstrumentationTestRunner"
        android:label="test"
        android:targetPackage="com.example.testaudio" />

<manifest xmlns:android="    package="com.example.testaudio" 
    android:versionCode="1" 
    android:versionName="1.0" > 
 
    <uses-sdk 
        android:minSdkVersion="8" 
        android:targetSdkVersion="18" /> 
 
    <application 
        android:allowBackup="true" 
        android:icon="@drawable/ic_launcher" 
        android:label="@string/app_name" 
        android:theme="@style/AppTheme" > 
        <uses-library android:name="android.test.runner" /> 
    </application> 
    <!-- 與application標簽同級的位置添加 --> 
    <instrumentation 
        android:name="android.test.InstrumentationTestRunner" 
        android:label="test" 
        android:targetPackage="com.example.testaudio" /> 
 
</manifest>