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我已经尝试过类似的问题阻止警报在另一个活动中响起。但是，它在我的情况下不起作用。我想要实现的是：

  1. 当通知触发时，铃声在广播接收器中开始。
  2. 如果设备处于开启状态，用户可以在弹出通知上停止铃声按下按钮。
  3. 如果设备关闭，则全屏活动打开，用户可以在此活动中按停止按钮停止铃声。

问题是，当我在全屏活动中按下停止按钮时，铃声不会停止。

这是代码。报警接收器：

class AlarmReceiver: BroadcastReceiver() {

        companion object {
            lateinit var ringtoneSound: Ringtone
            val ALARM_CHANNEL_ID = "alarm_channel"
        }

        lateinit var notificationManager: NotificationManager

        override fun onReceive(context: Context, intent: Intent) {

            val alarmId = intent.getIntExtra("alarmId", 0)
            val title = intent.getStringExtra("title")
            val memo = intent.getStringExtra("memo")
            val ringLength = intent.getIntExtra("ringLength", 5)


            notificationManager =
                context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager

            createAlarmChannel()

            val contentIntent = Intent(context, MainActivity::class.java)
            val contentPendingIntent = PendingIntent.getActivity(
                context, alarmId, contentIntent, PendingIntent.FLAG_UPDATE_CURRENT)

            val fullScreenIntent = Intent(context, LockscreenActivity::class.java)
            val fullScreenPendingIntent = PendingIntent.getActivity(context, alarmId, fullScreenIntent, 0)

            val deleteIntent = Intent(context, StopAlarmReceiver::class.java).putExtra("alarmId", alarmId)
            val deletePendingIntent = PendingIntent.getBroadcast(context,alarmId,deleteIntent,0)

            val builder = NotificationCompat.Builder(context, ALARM_CHANNEL_ID)
                .setSmallIcon(R.drawable.ic_circle_24)
                .setContentTitle(title)
                .setContentText(memo)
                .setColor(ResourcesCompat.getColor(context.resources, R.color.purple_700, null))
                .setContentIntent(contentPendingIntent)
                .setFullScreenIntent(fullScreenPendingIntent, true)
                .setPriority(NotificationCompat.PRIORITY_HIGH)
                .setCategory(NotificationCompat.CATEGORY_ALARM)
                .setAutoCancel(true)
                .setSound(null)
                .addAction(R.drawable.ic_circle_24, "STOP", deletePendingIntent)

            notificationManager.notify(alarmId, builder.build())

            // when notification fired, Ringtone starts.
            ringtoneSound = RingtoneManager.getRingtone(context, getDefaultUri(RingtoneManager.TYPE_ALARM))
            ringtoneSound.play()

            // and after certain seconds, Ringtone will stop.
            val countLength = 1000 * ringLength.toLong()
            object : CountDownTimer(countLength, 1000) {

                override fun onTick(millisUntilFinished: Long) {}

                override fun onFinish() {
                    ringtoneSound.stop()
                    notificationManager.cancel(alarmId)
                }
            }.start()
        }


    fun createAlarmChannel() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            val alarmChannel = NotificationChannel(ALARM_CHANNEL_ID, "Alarm", NotificationManager.IMPORTANCE_HIGH)
            alarmChannel.setSound(null, null)
            alarmChannel.enableLights(true)
            alarmChannel.lightColor = Color.RED
            alarmChannel.enableVibration(true)
            alarmChannel.description = "Alarm style"
            alarmChannel.lockscreenVisibility = Notification.VISIBILITY_PUBLIC
            notificationManager.createNotificationChannel(alarmChannel)
        }
    }
}

停止警报接收器：

class StopAlarmReceiver: BroadcastReceiver() {

        override fun onReceive(context: Context, intent: Intent) {

            val alarmId = intent.getIntExtra("alarmId", 0)

            // This stops alarm when press the button of notification.(It works!)
            AlarmReceiver.ringtoneSound.stop()


            val notificationManager =
                context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
            notificationManager.cancel(alarmId)
        }
    }

LockScreenActivity：

class LockscreenActivity : AppCompatActivity() {

    private lateinit var binding: ActivityLockscreenBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        showWhenLockedAndTurnScreenOn()
        super.onCreate(savedInstanceState)
        binding = ActivityLockscreenBinding.inflate(layoutInflater)
        setContentView(binding.root)


        binding.stoppingbutton.setOnClickListener {

            // This does not stop Alarm!
            AlarmReceiver.ringtoneSound.stop()

            finish()
        }

    }


    private fun showWhenLockedAndTurnScreenOn() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
            setShowWhenLocked(true)
            setTurnScreenOn(true)
        } else {
            window.addFlags(
                WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
                        or WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
            )
        }
    }
}

StopAlarmReceiver 正在工作，但是即使使用相同的代码，LockScreenActivity 也不起作用。

当然，如果我写start()在 LockScreenActivity 上，它就可以工作。但是，当设备打开并出现弹出窗口时，铃声不会开始。那么如何从 Activity 中停止接收者的铃声呢？任何帮助表示赞赏。

4

1 回答 1

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我刚刚自己解决了。

  1. 做新的服务。
  2. 铃声开始服务。
  3. 从我想要的任何地方（全屏或通知）停止此服务。
  4. 销毁服务时，服务停止铃声。

然后，一切正常。

于 2021-12-26T03:56:30.383 回答