Question

我正在建立ping功能，通过蓝牙找到丢失的手机。我需要手机发出声音，即使它被设置为静音/静音，就像闹钟通常如何工作一样。我以为我可以将streamtype notification AudioManager.STREAM_ALARM添加到NotificationCompat.Builder builder = new NotificationCompat.Builder(getApplicationContext()); builder.setSmallIcon(R.drawable.ic_spenwallet) .setContentTitle("Ping") .setContentText("Device is trying to find your phone.") .setAutoCancel(false) .setSound(sound, STREAM_ALARM) .setVibrate(vibratePattern) .addAction(cancelAction);，但它不起作用。它仅在手机声音打开时发出声音。这就是我设置它的方式：

    Notification notification = builder.build();
    notification.audioStreamType = AudioManager.STREAM_ALARM;

如果我尝试：

notificaiton

我从Android Studio收到一条警告，即不推荐使用audioStreamType。是这样的吗？即使启用了静音模式，还有其他任何方式可以发出MediaPlayer mediaPlayer = new MediaPlayer(); final String packageName = getApplicationContext().getPackageName(); Uri sound = Uri.parse("android.resource://" + packageName + "/" + R.raw.ping_sound); try { mediaPlayer.setDataSource(this, sound); } catch (IOException e) { e.printStackTrace(); } final AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE); if (audioManager.getStreamVolume(AudioManager.STREAM_ALARM) != 0) { mediaPlayer.setAudioStreamType(AudioManager.STREAM_ALARM); mediaPlayer.setLooping(false); try { mediaPlayer.prepare(); } catch (IOException e) { e.printStackTrace(); } mediaPlayer.start(); }声音吗？（最好是振动）

我为此目的创建了一个专用的媒体播放器，但我认为不应该这样做。继承人我是怎么做到的：

InstanceContextMode = InstanceContextMode.PerSession

Answer 1

使用builder.setSound(alarmSound, AudioManager.STREAM_AUDIO)正是保持警报持续运行所需要的！也许您的问题与您使用的R.raw.ping_sound声音样本有关。在尝试了一堆可怕的实现之后，我在网上发现了警报通知（在这里找到了Settings.System.DEFAULT_RINGTONE_URI），我遵循了official notification documentation，然后使用了NotificationCompat.Builder文档进行自定义。

这是我的工作警报通知：

private void showNotification(){
    // Setup Intent for when Notification clicked
    Intent intent = new Intent(mContext, MedsActivity.class);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK); // See https://developer.android.com/training/notify-user/navigation for better navigation
    PendingIntent pendingIntent = PendingIntent.getActivity(mContext, 0, intent, 0);

    // Setup Ringtone & Vibrate
    Uri alarmSound = Settings.System.DEFAULT_RINGTONE_URI;
    long[] vibratePattern = { 0, 100, 200, 300 };

    // Setup Notification
    String channelID = mContext.getResources().getString(R.string.channel_id_alarms);
    NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mContext, channelID)
            .setContentText(notificationMessage)
            .setContentTitle(notificationTitle)
            .setSmallIcon(R.mipmap.ic_launcher_round)
            .setPriority(NotificationCompat.PRIORITY_DEFAULT)
            .setCategory(NotificationCompat.CATEGORY_ALARM)
            .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
            .setContentIntent(pendingIntent)
            .setSound(alarmSound, AudioManager.STREAM_ALARM)
            .setOnlyAlertOnce(true)
            .setVibrate(vibratePattern)
            .setAutoCancel(true);

    // Send Notification
    NotificationManager manager = (NotificationManager) mContext.getSystemService(NOTIFICATION_SERVICE);
    manager.notify(NOTIFICATION_ID, mBuilder.build());
}

NotificationCompat setSound（sound，STREAM_ALARM）无效

1 个答案: