Question

我尝试以下列方式读出警报音量，但我总是得到错误的值。铃声音量总是正确!! 这种情况发生在每个智能手机，HTC，三星，索尼甚至虚拟设备上。可能是什么问题？

private AudioManager amanager;

@Override
public void onCreate(Bundle savedInstanceState) 
{

    amanager = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);

}



int volume = 3;
int alarm = 3;

try{
    volume = amanager.getStreamVolume(amanager.getStreamVolume(AudioManager.STREAM_RING));
    alarm = amanager.getStreamVolume(amanager.getStreamVolume(AudioManager.STREAM_ALARM));
    Log.i("!!!!!!!!!!", "Activity!!,  Volume ringer: " + volume + " Vol Alarm: " + alarm);

}catch(IllegalArgumentException e){}

Answer 1

我的铃声音量值得错了。方法getStreamVolume (int streamType)获得int并返回int。当你写：

alarm = amanager.getStreamVolume(amanager.getStreamVolume(AudioManager.STREAM_ALARM));

你实际上获得了警报的音量（假设它是X），然后传递给alarm值alarm = amanager.getStreamVolume(X);

所以结果出乎意料将volume和alarm的值更改为 -

volume = amanager.getStreamVolume(AudioManager.STREAM_RING);
alarm = amanager.getStreamVolume(AudioManager.STREAM_ALARM);

读出警报音量

1 个答案: