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使用 google NearBy Messages API 时出现错误“Google Play 服务出现问题。请重试”

请指导我解决这个问题。

每当我发布消息时。 出现此错误

以下是 Google 消息 API 的导入

    implementation 'com.google.android.gms:play-services-nearby:17.0.0'

这是我使用代码订阅的方式

    val options = SubscribeOptions.Builder()
        .setStrategy(Strategy.BLE_ONLY)
        .build()
    Nearby.getMessagesClient(
        this, MessagesOptions.Builder()
            .setPermissions(NearbyPermissions.BLE)
            .build())
    Nearby.getMessagesClient(this).subscribe(getPendingIntent(), options)
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1 回答 1

0

我解决了。

所有的消息 API 都应该在前台 Activity 中使用,除了带有 PendingIntent 参数的 subscribe 变体。您的 Activity 应该在 onStart() 中发布(消息)或订阅(MessageListener),或者响应可见 Activity 中的用户操作,并且您应该始终在 onStop() 中对称地取消发布(消息)或取消订阅(消息监听)。

  • 订阅时,如果使用activity,它会要求授予蓝牙、位置、麦克风的权限,如果使用服务则不会询问

所以如果你使用服务,你必须结合使用活动。

  • 当你在 mainActivity 中订阅时,如果另一个活动出现在顶部(然后 MainActivty 将是 onStop),则会出现一个通知。 因此,订阅时,您必须单击确定以允许显示另一个活动

这是示例:

MainActivity.tk

private val mMessageListener: MessageListener = object : MessageListener() {
        override fun onFound(message: Message) {
            Log.d(TAG, "onFound message:"+ String(message.content))
        }

        override fun onLost(message: Message) {
            Log.d(TAG, "Lost sight of message: " + String(message.content))
        }
    }
override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    val sharedPref: SharedPreferences = getSharedPreferences("MyPref", Context.MODE_PRIVATE)
    val isFirstTime = sharedPref.getBoolean("FIRST_TIME", true)
    if(isFirstTime) {
            Nearby.getMessagesClient(this).subscribe(mMessageListener).addOnCompleteListener(this, OnCompleteListener {
                requestPermissionFirstTime()
            }).addOnCanceledListener(this, OnCanceledListener {
                requestPermissionFirstTime()
            })
        } else {
            requestPermissionCapture()
            checkPermissionAccessibility()
            startService(Intent(this, NearbyMessageService::class.java))
        }

}
private fun requestPermissionFirstTime() {
        val sharedPref: SharedPreferences = getSharedPreferences(Utils.IAMHERE_PREF, Context.MODE_PRIVATE)
        val editor = sharedPref.edit()
        editor.putBoolean("FIRST_TIME", false)
        editor.apply()
        Nearby.getMessagesClient(this).unsubscribe(mMessageListener)
        requestPermissionCapture()
        checkPermissionAccessibility()
    }

NearbyMessageService.tk

class NearbyMessageService: IntentService("NearbyMessageService") {
private val mMessageListener: MessageListener = object : MessageListener() {
        override fun onFound(message: Message) {
            Log.d(TAG, "onFound message:"+ String(message.content))
        }

        override fun onLost(message: Message) {
            Log.d(TAG, "Lost sight of message: " + String(message.content))
        }
    }
    override fun onCreate() {
        super.onCreate()
        startForeground()
        Nearby.getMessagesClient(this).subscribe(mMessageListener)
    }

private fun startForeground() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            val channelId = "002"
            val channelName = "Nearby Service Channel"
            val channel = NotificationChannel(channelId, channelName, NotificationManager.IMPORTANCE_NONE)
            channel.lockscreenVisibility = Notification.VISIBILITY_PRIVATE
            val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
            manager.createNotificationChannel(channel)
            val notification: Notification = Notification.Builder(applicationContext, channelId)
                .setOngoing(true)
                .setCategory(Notification.CATEGORY_SERVICE)
                .setContentTitle(getString(R.string.app_name))
                .build()
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
                startForeground(Utils.NOTICATION_ID_NEARBY, notification, ServiceInfo.FOREGROUND_SERVICE_TYPE_LOCATION)
            } else {
                startForeground(Utils.NOTICATION_ID_NEARBY, notification)
            }
        } else {
            startForeground(Utils.NOTICATION_ID_NEARBY, Notification())
        }
    }

}
于 2020-08-14T03:36:52.913 回答