android.media.AudioManager#STREAM_DTMF源码实例Demo

private int getAudioOutput() {
    SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
    String value = sharedPref.getString("settings_calibration_audio_output", "STREAM_MUSIC");

    if("STREAM_VOICE_CALL".equals(value)) {
        return AudioManager.STREAM_VOICE_CALL;
    } else if("STREAM_SYSTEM".equals(value)) {
        return AudioManager.STREAM_SYSTEM;
    } else if("STREAM_RING".equals(value)) {
        return AudioManager.STREAM_RING;
    } else if("STREAM_MUSIC".equals(value)) {
        return AudioManager.STREAM_MUSIC;
    } else if("STREAM_ALARM".equals(value)) {
        return AudioManager.STREAM_ALARM;
    } else if("STREAM_NOTIFICATION".equals(value)) {
        return AudioManager.STREAM_NOTIFICATION;
    } else if("STREAM_DTMF".equals(value)) {
        return AudioManager.STREAM_DTMF;
    } else {
        return AudioManager.STREAM_RING;
    }
}
 

private int getAudioOutput() {
    SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
    String value = sharedPref.getString("settings_calibration_audio_output", "STREAM_MUSIC");

    if("STREAM_VOICE_CALL".equals(value)) {
        return AudioManager.STREAM_VOICE_CALL;
    } else if("STREAM_SYSTEM".equals(value)) {
        return AudioManager.STREAM_SYSTEM;
    } else if("STREAM_RING".equals(value)) {
        return AudioManager.STREAM_RING;
    } else if("STREAM_MUSIC".equals(value)) {
        return AudioManager.STREAM_MUSIC;
    } else if("STREAM_ALARM".equals(value)) {
        return AudioManager.STREAM_ALARM;
    } else if("STREAM_NOTIFICATION".equals(value)) {
        return AudioManager.STREAM_NOTIFICATION;
    } else if("STREAM_DTMF".equals(value)) {
        return AudioManager.STREAM_DTMF;
    } else {
        return AudioManager.STREAM_RING;
    }
}
 

private static String streamTypeToString(int streamtype) {
    switch (streamtype) {
        case AudioManager.STREAM_ALARM:
            return "ALARM";
        case AudioManager.STREAM_DTMF:
            return "DTMF";
        case AudioManager.STREAM_MUSIC:
            return "MUSIC";
        case AudioManager.STREAM_NOTIFICATION:
            return "NOTIFICATION";
        case AudioManager.STREAM_RING:
            return "RING";
        case AudioManager.STREAM_SYSTEM:
            return "SYSTEM";
        case AudioManager.STREAM_VOICE_CALL:
            return "VOICE_CALL";
        default:
            return "Unknown stream type; " + streamtype;
    }
}
 

private static int toLegacyStreamType(AudioAttributes aa) {
    // flags to stream type mapping
    if ((aa.getFlags() & AudioAttributes.FLAG_AUDIBILITY_ENFORCED)
            == AudioAttributes.FLAG_AUDIBILITY_ENFORCED) {
        return STREAM_SYSTEM_ENFORCED;
    }
    if ((aa.getFlags() & FLAG_SCO) == FLAG_SCO) {
        return STREAM_BLUETOOTH_SCO;
    }

    // usage to stream type mapping
    switch (aa.getUsage()) {
        case AudioAttributes.USAGE_MEDIA:
        case AudioAttributes.USAGE_GAME:
        case AudioAttributes.USAGE_ASSISTANCE_ACCESSIBILITY:
        case AudioAttributes.USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
            return AudioManager.STREAM_MUSIC;
        case AudioAttributes.USAGE_ASSISTANCE_SONIFICATION:
            return AudioManager.STREAM_SYSTEM;
        case AudioAttributes.USAGE_VOICE_COMMUNICATION:
            return AudioManager.STREAM_VOICE_CALL;
        case AudioAttributes.USAGE_VOICE_COMMUNICATION_SIGNALLING:
            return AudioManager.STREAM_DTMF;
        case AudioAttributes.USAGE_ALARM:
            return AudioManager.STREAM_ALARM;
        case AudioAttributes.USAGE_NOTIFICATION_RINGTONE:
            return AudioManager.STREAM_RING;
        case AudioAttributes.USAGE_NOTIFICATION:
        case AudioAttributes.USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
        case AudioAttributes.USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
        case AudioAttributes.USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
        case AudioAttributes.USAGE_NOTIFICATION_EVENT:
            return AudioManager.STREAM_NOTIFICATION;
        case AudioAttributes.USAGE_UNKNOWN:
        default:
            return AudioManager.STREAM_MUSIC;
    }
}