Android调节音量

最新推荐文章于 2024-03-21 11:03:02 发布

原创最新推荐文章于 2024-03-21 11:03:02 发布 · 798 阅读

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#android #system #service #audio #ui #音乐

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本文介绍了如何在Android中使用AudioManager对象实现音量的控制和获取功能，包括重写Activity的onKeyDown方法来调整音乐音量，以及通过getStreamVolume和getStreamMaxVolume方法获取不同场景下的当前音量和最大音量。

引用 AudioManager 对象

AudioManager audio = (AudioManager) getSystemService(Service.AUDIO_SERVICE);

重写 Activity 的 onKeyDown 方法

public boolean onKeyDown(int keyCode, KeyEvent event) {
    switch (keyCode) {
    case KeyEvent.KEYCODE_VOLUME_UP:
        audio.adjustStreamVolume(
            AudioManager.STREAM_MUSIC,
            AudioManager.ADJUST_RAISE,
            AudioManager.FLAG_PLAY_SOUND | AudioManager.FLAG_SHOW_UI);
        return true;
    case KeyEvent.KEYCODE_VOLUME_DOWN:
        audio.adjustStreamVolume(
            AudioManager.STREAM_MUSIC,
            AudioManager.ADJUST_LOWER,
            AudioManager.FLAG_PLAY_SOUND | AudioManager.FLAG_SHOW_UI);
        return true;
    default:
        break;
    }
    return super.onKeyDown(keyCode, event);
}

//通话音量

int max = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_VOICE_CALL ); 
 int current = mAudioManager.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（媒体音量的设置）

   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 = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_ALARM ); 
   current = mAudioManager.getStreamVolume( AudioManager.STREAM_ALARM ); 
    Log.d("ALARM", "max : " + max + " current : " + current);

也可以使用Activity的方法来改变音量类型

this.setVolumeControlStream(AudioManager.STREAM_MUSIC);