private void volume(String control) {
        AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
        int maxVolume = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
        int minVolume = 10;
        int stepVolume = 5;
        int currentMusicVolume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
        int currentTTSVolume = audioManager.getStreamVolume(AudioManager.STREAM_ALARM);


        switch (control) {
            case "VOLUME_MINUS": //步进减小
                currentMusicVolume -= stepVolume;
                if (currentMusicVolume < minVolume) {
                    currentMusicVolume = minVolume;
                }
                currentTTSVolume -= stepVolume;
                if (currentTTSVolume < minVolume) {
                    currentTTSVolume = minVolume;
                }
                break;
            case "VOLUME_PLUS": //步进累加
                currentMusicVolume += stepVolume;
                if (currentMusicVolume >= maxVolume) {
                    currentMusicVolume = maxVolume;
                }
                currentTTSVolume += stepVolume;
                if (currentTTSVolume > maxVolume) {
                    currentTTSVolume = maxVolume;
                }
                break;

            case "VOLUME_MAX": // 最大
                currentMusicVolume = currentTTSVolume = maxVolume;

                break;
            case "VOLUME_MIN": //最小
                currentMusicVolume = currentTTSVolume = minVolume;

                break;
            case "MUTE": //静音
                currentMusicVolume = currentTTSVolume = minVolume;
                break;

        }
        audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, currentMusicVolume, AudioManager.FLAG_SHOW_UI);
        audioManager.setStreamVolume(AudioManager.STREAM_ALARM, currentTTSVolume, AudioManager.FLAG_PLAY_SOUND);
        Log.d(TAG, String.format("volume: currentMusicVolume=%s, currentTTSVolume=%s, maxVolume=%s", currentMusicVolume, currentTTSVolume, maxVolume));
    }

    private void volume(double percent) {
        if (percent < 0.3) {
            return;
        }
        AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
        int maxVolume = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
        int currentMusicVolume, currentTTSVolume;
        currentMusicVolume = currentTTSVolume = (int) (maxVolume * percent);
        audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, currentMusicVolume, AudioManager.FLAG_SHOW_UI);
        audioManager.setStreamVolume(AudioManager.STREAM_ALARM, currentTTSVolume, AudioManager.FLAG_PLAY_SOUND);
        Log.d(TAG, String.format("volume: currentMusicVolume=%s, currentTTSVolume=%s, maxVolume=%s", currentMusicVolume, currentTTSVolume, maxVolume));
    }		
		
		

关闭扬声器

		
audioManager = (AudioManager) mcontext.getSystemService(Context.AUDIO_SERVICE);
audioManager.setSpeakerphoneOn(false);
audioManager.setStreamVolume(AudioManager.STREAM_VOICE_CALL, 0, AudioManager.STREAM_VOICE_CALL);
audioManager.setMode(AudioManager.MODE_IN_CALL);