我正在尝试使用 Nearby Messages API 在 Android 12 beta 5 上检测信标。我按照文档中的描述做了所有事情。我的应用程序仅用于检测信标。在低于 android 12 的版本上，一切正常，但使用 android 12 我很难。我已经检查了所有权限。我也可以在附近的设备应用程序列表中看到我的应用程序。我可以在同一部手机上的 3rd 方应用程序中扫描信标。也许其他人也面临这个问题，可以帮助我。
这是我的代码：
显现 -
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
…………
<meta-data
android:name="com.google.android.nearby.messages.API_KEY"
android:value="@string/nearby_api_key" />
……
near_api_key 取自 Google Play 控制台。
Activity类相关代码：
fun getMessagesClient(): MessagesClient {
if (messageClient == null) {
messageClient = Nearby.getMessagesClient(this, MessagesOptions.Builder()
.setPermissions(NearbyPermissions.BLE)
.build())
}
return messageClient!!
}
val statusCallback = object : StatusCallback() {
override fun onPermissionChanged(p0: Boolean) {
super.onPermissionChanged(p0)
//all permissions are given
startScan()
}
}
private fun getSubscribeOptions(): SubscribeOptions {
val messageFilter = MessageFilter.Builder()
.includeIBeaconIds(Identifiers.beaconType1Uuid, null, null)
.includeIBeaconIds(Identifiers.beaconType2Uuid, null, null)
.includeAllMyTypes()
.build()
val options = SubscribeOptions.Builder()
.setStrategy(Strategy.BLE_ONLY)
.setFilter(messageFilter)
.setCallback(object : SubscribeCallback() {
override fun onExpired() {
Log.v(TAG, "options onExpired")
}
})
.build()
return options
}
private fun startScan() {
getMessagesClient()
.subscribe(beaconMessageListener, getSubscribeOptions()) // Do NOT receive messages within this callback
.addOnSuccessListener {
Log.d(TAG, "subscribe on Success")
}
.addOnFailureListener {
Log.d(TAG, "subscribe on Fail $it")
}
}
val beaconMessageListener = object : MessageListener() {
override fun onFound(message: Message) { // Is not called
super.onFound(message)
message?.let {
onFoundBeacon(it)
}
}
override fun onLost(message: Message) {
super.onLost(message)
message?.let {
onLostBeacon(it)
}
}
override fun onDistanceChanged(message: Message, distance: Distance) {
super.onDistanceChanged(message, distance)
message?.let {
onBeaconDistanceChanged(message, distance)
}
}
override fun onBleSignalChanged(p0: Message, p1: BleSignal) {
super.onBleSignalChanged(p0, p1)
Log.i(LogTag.BEACON, "onBleSignalChanged $p0 ,\nisStarted() $isStarted\nBleSignal $p1")
}
}
在 build.gradle
implementation 'com.google.android.gms:play-services-nearby:18.0.0'
提前谢谢了！