学步园

/**<br /> *<br /> * [多媒体音量调节]<BR><br /> * [功能详细描述]<br /> *<br /> * @param keyCode<br /> * @param event<br /> * @return<br /> * @see android.app.Activity#onKeyDown(int, android.view.KeyEvent)<br /> */<br /> @Override<br /> public boolean onKeyDown(int keyCode, KeyEvent event)<br /> {<br /> // TODO Auto-generated method stub<br /> if (keyCode == KeyEvent.KEYCODE_VOLUME_UP)<br /> {<br /> AudioManager audioMa = (AudioManager) this<br /> .getSystemService(Context.AUDIO_SERVICE);<br /> audioMa.adjustStreamVolume(AudioManager.STREAM_MUSIC,<br /> AudioManager.ADJUST_RAISE, AudioManager.FX_FOCUS_NAVIGATION_UP);<br /> return true;<br /> }<br /> else if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN)<br /> {<br /> AudioManager audioMa = (AudioManager) this<br /> .getSystemService(Context.AUDIO_SERVICE);<br /> audioMa.adjustStreamVolume(AudioManager.STREAM_MUSIC,<br /> AudioManager.ADJUST_LOWER, AudioManager.FX_FOCUS_NAVIGATION_UP);<br /> return true;<br /> }<br /> else<br /> {<br /> return super.onKeyDown(keyCode, event);<br /> }<br /> }

或者:  setVolumeControlStream(AudioManager.STREAM_MUSIC);

 AudioManager am = (AudioManager) getSystemService(Context.AUDIO_SERVICE);

//通话音量

      int max = am.getStreamMaxVolume( AudioManager.STREAM_VOICE_CALL );

      int current = am.getStreamVolume( AudioManager.STREAM_VOICE_CALL );

      Log.d(”VIOCE_CALL”, “max : ” + max + ” current : ” + current);

//系统音量

      max = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_SYSTEM );

      current = mAudioManager.getStreamVolume( AudioManager.STREAM_SYSTEM );

      Log.d(”SYSTEM”, “max : ” + max + ” current : ” + current);

//铃声音量

      max = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_RING );

      current = mAudioManager.getStreamVolume( AudioManager.STREAM_RING );

      Log.d(”RING”, “max : ” + max + ” current : ” + current);

//音乐音量

      max = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_MUSIC );

      current = mAudioManager.getStreamVolume( AudioManager.STREAM_MUSIC );

      Log.d(”MUSIC”, “max : ” + max + ” current : ” + current);

//提示声音音量

      max = am.getStreamMaxVolume( AudioManager.STREAM_ALARM );

      current = sm.getStreamVolume( AudioManager.STREAM_ALARM );

      Log.d(”ALARM”, “max : ” + max + ” current : ” + current);

设置音量的方法也很简单，AudioManager提供了方法：
public void setStreamVolume(int streamType, int index, int flags)
其中 streamType 有内置的常量,可以在AudioManager里面查到相关的定义。