Question

我正在开发一个IME，我有按钮点击的声音。我在首选项屏幕中有一个选项可以改变声音的音量。 SeekBar值从0.0到1.0。现在我尝试让用户在首选项屏幕中配置按钮的音量，稍后我会得到此值并将其保存为mSoundVol参数。因此，对于点击的声音，我写了以下方法：

 float soundVolume;
 int maxVolume, sound;

        switch (primaryCode) {
            case Keyboard.KEYCODE_DELETE:
                maxVolume = mAudioManager.getStreamMaxVolume(mAudioManager.FX_KEYPRESS_DELETE);
                sound = mAudioManager.FX_KEYPRESS_DELETE;
                Log.d(TAG+ "-volume", "chosen sound: mAudioManager.FX_KEYPRESS_DELETE");
                break;
            case ASCII_ENTER:
                maxVolume = mAudioManager.getStreamMaxVolume(mAudioManager.FX_KEYPRESS_RETURN);
                sound = mAudioManager.FX_KEYPRESS_RETURN;
                Log.d(TAG+ "-volume", "chosen sound: mAudioManager.FX_KEYPRESS_RETURN");
                break;
            case ASCII_SPACE:
                maxVolume = mAudioManager.getStreamMaxVolume(mAudioManager.FX_KEYPRESS_SPACEBAR);
                sound = mAudioManager.FX_KEYPRESS_SPACEBAR;
                Log.d(TAG+ "-volume", "chosen sound: mAudioManager.FX_KEYPRESS_SPACEBAR");
                break;
            default:
                maxVolume = mAudioManager.getStreamMaxVolume(mAudioManager.FX_KEYPRESS_STANDARD);
                sound = mAudioManager.FX_KEYPRESS_STANDARD;
                Log.d(TAG + "-volume", "chosen sound: mAudioManager.FX_KEYPRESS_STANDARD");
        }

        soundVolume = maxVolume * mSoundVol;
        Log.d(TAG+ "-volume", "current max volume: " + maxVolume + " current volume setting: " +mSoundVol * 100 +"%" + " volume result: " + soundVolume);
        mAudioManager.playSoundEffect(sound, soundVolume);

但由于某种原因，这不会改变用户的声音音量。

有人可以告诉我，我在这里做错了什么吗？

感谢。

Answer 1

您需要使用此方法获得更准确的结果

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

audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,
                             [int value],
                             [if desired a flag]);

修改

以此FLAg为例

AudioManager.FLAG_PLAY_SOUND

这意味着每当用户按下音量按钮时，双音将被输出

编辑2

这是代码的实现

audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,
                             AudioManager.getStreamMaxVolume(),
                             AudioManager.FLAG_PLAY_SOUND);

Answer 2

我的案例中的解决方案是：

 float soundVolume;
        int maxVolume, sound;

        switch (primaryCode) {
            case Keyboard.KEYCODE_DELETE:
                sound = mAudioManager.FX_KEYPRESS_DELETE;
                break;
            case ASCII_ENTER:
                sound = mAudioManager.FX_KEYPRESS_RETURN;
                break;
            case ASCII_SPACE:
                sound = mAudioManager.FX_KEYPRESS_SPACEBAR;
                break;
            default:
                sound = mAudioManager.FX_KEYPRESS_STANDARD;
                break;
        }
        maxVolume = mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
        soundVolume = maxVolume * mSoundVol;
        mAudioManager.setStreamVolume(AudioManager.STREAM_SYSTEM , (int)(soundVolume * 1.5) , 0);
        mAudioManager.playSoundEffect(sound);

重要的是将0作为setStreamVolume方法的最后一个参数传递，这样一来，此操作只会更改音量而不播放任何其他显示音量UI的声音。

按下按钮时音量问题：

2 个答案: