一个测试马达和听筒的activity

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工程模式中，测试马达功能和听筒是否正常也是测试项目的一部分。简单的测试可如下：

（1）使用的特定import

import android.media.AudioManager;import android.media.MediaPlayer;import android.os.Vibrator;

需要在XML中添加马达特定权限

<uses-permission android:name="android.permission.VIBRATE" ></uses-permission>

（2）activity内容

Vibrator mVibrator;AudioManager am;public MediaPlayer myPlayer1;private int mSystemVol_music = 0;   //保存当前music音量private int mSystemVol_voice = 0;   //保存当前voice音量

onCreate函数

mVibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);am= (AudioManager) getSystemService(Context.AUDIO_SERVICE);myPlayer1 = new MediaPlayer();myPlayer1 = MediaPlayer.create(MainActivity.this, R.raw.masque);  //添加一个音频文件try{setVolumeControlStream(AudioManager.STREAM_VOICE_CALL);am.setMode(AudioManager.MODE_IN_CALL);   //当前activity的audio modemSystemVol_music= am.getStreamVolume(AudioManager.STREAM_MUSIC);int vol_max_music = am.getStreamMaxVolume(AudioManager.STREAM_MUSIC);am.setStreamVolume(AudioManager.STREAM_MUSIC, vol_max_music, 0);mSystemVol_voice = am.getStreamVolume(AudioManager.STREAM_VOICE_CALL);int vol_max_voice = am.getStreamMaxVolume(AudioManager.STREAM_VOICE_CALL);am.setStreamVolume(AudioManager.STREAM_VOICE_CALL, vol_max_voice, 0);if(myPlayer1.isPlaying()==true){myPlayer1.reset();}myPlayer1.setLooping(true);myPlayer1.start();}catch (IllegalStateException e){e.printStackTrace();}mVibrator.vibrate(new long[]{100, 300, 150, 400}, 1);

onDestroy函数

myPlayer1.stop();am.setStreamVolume(AudioManager.STREAM_VOICE_CALL, mSystemVol_voice, 0);am.setStreamVolume(AudioManager.STREAM_MUSIC, mSystemVol_music, 0);   //恢复默认音量setVolumeControlStream(AudioManager.STREAM_MUSIC);am.setMode(AudioManager.MODE_NORMAL);mVibrator.cancel();super.onDestroy();