如何在Android中增加或减少小数音量

// 获取AudioManager实例
AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);

// 获取当前媒体音量
int currentVolume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);

// 增加小数音量
float increaseVolume = 0.1f;
int maxVolume = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
int newVolume = (int) (currentVolume + increaseVolume * maxVolume);
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, newVolume, 0);

// 减少小数音量
float decreaseVolume = 0.1f;
int minVolume = 0;
newVolume = (int) (currentVolume - decreaseVolume * maxVolume);
if (newVolume < minVolume) {
    newVolume = minVolume;
}
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, newVolume, 0);