android音量控制AudioManager

android音量控制AudioManager先获取系统音频管理服务

AudioManager <span style="color: rgb(70, 70, 70); font-size: 14px; line-height: 21px; background-color: rgb(234, 247, 253);">mAudioManager </span>= (AudioManager) context
.getSystemService(Context.AUDIO_SERVICE);

1，增大音量

audioManager.adjustStreamVolume(AudioManager.STREAM_SYSTEM,
AudioManager.ADJUST_RAISE, AudioManager.FLAG_SHOW_UI);

2，减小音量

<span style="font-family:FangSong_GB2312;">audioManager.adjustStreamVolume(AudioManager.STREAM_SYSTEM,
AudioManager.ADJUST_LOWER, AudioManager.FLAG_SHOW_UI);</span>

增大音量：AudioManager.ADJUST_RAISE减小音量：AudioManager.ADJUST_LOWER设置音量大小

setStreamVolume(int streamType, int index, int flags)

参数：streamType是系统音频，还事音乐，录音其他等；

STREAM_SYSTEM

系统，

STREAM_RING铃声，
STREAM_MUSIC音乐等；
index设置AudioManager.ADJUST_RAISE是音量增大一个单位，Audi4000oManager.ADJUST_LOWER是音量减小一个单位，还可以直接传值，0是音量最小，100是音量最大，可以获取当前最大值，在设置...flags设置是否显示音量增大减小的UI界面 AudioManager.FLAG_SHOW_UI显示，其他...[code]<span style="font-family:FangSong_GB2312;">//最大音量int maxVolume = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);//当前音量int currentVolume = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC);</span>

<span style="font-family:FangSong_GB2312;">//通话音量int max = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_VOICE_CALL );int current = mAudioManager.getStreamVolume( AudioManager.STREAM_VOICE_CALL );//系统音量int max = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_SYSTEM );current = mAudioManager.getStreamVolume( AudioManager.STREAM_SYSTEM );//铃声音量max = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_RING );current = mAudioManager.getStreamVolume( AudioManager.STREAM_RING );//音乐音量max = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_MUSIC );current = mAudioManager.getStreamVolume( AudioManager.STREAM_MUSIC );//提示声音音量max = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_ALARM );current = mAudioManager.getStreamVolume( AudioManager.STREAM_ALARM );</span>