如何解决如何使用andoid kotlin在后台获取位置
class LocationService : Service() {
private var mLocationManager: LocationManager? = null
private val binder = LocalBinder()
var notification: Notification? = null
var mLocationListeners = arrayOf(LocationListener(LocationManager.GPS_PROVIDER),LocationListener(LocationManager.NETWORK_PROVIDER))
class LocationListener(provider: String) : android.location.LocationListener {
internal var mLastLocation: Location
init {
Log.e(TAG,"LocationListener $provider")
mLastLocation = Location(provider)
}
override fun onLocationChanged(location: Location) {
Log.e(TAG,"onLocationChanged: $location")
mLastLocation.set(location)
Log.v("LastLocation",mLastLocation.latitude.toString() + " " + mLastLocation.longitude.toString())
}
override fun onProviderdisabled(provider: String) {
Log.e(TAG,"onProviderdisabled: $provider")
}
override fun onProviderEnabled(provider: String) {
Log.e(TAG,"onProviderEnabled: $provider")
}
override fun onStatusChanged(provider: String,status: Int,extras: Bundle) {
Log.e(TAG,"onStatusChanged: $provider")
}
}
override fun onBind(arg0: Intent): IBinder? {
return binder
}
override fun onStartCommand(intent: Intent?,flags: Int,startId: Int): Int {
Log.e(TAG,"onStartCommand")
super.onStartCommand(intent,flags,startId)
return START_STICKY
}
override fun onCreate() {
Log.e(TAG,"onCreate")
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
val NOTIFICATION_CHANNEL_ID = "com.example.simpleapp"
val channelName = "My Background Service"
val chan = NotificationChannel(NOTIFICATION_CHANNEL_ID,channelName,notificationmanager.IMPORTANCE_NONE)
chan.lightColor = Color.BLUE
chan.lockscreenVisibility = Notification.VISIBILITY_PRIVATE
val manager: notificationmanager = (getSystemService(NOTIFICATION_SERVICE) as notificationmanager)!!
manager.createNotificationChannel(chan)
val notificationBuilder: Notification.Builder = Notification.Builder(this,NOTIFICATION_CHANNEL_ID)
var notification: Notification = notificationBuilder.setongoing(true)
.setSmallIcon(R.drawable.ic_android)
.setContentTitle("App is running in background")
.setPriority(notificationmanager.IMPORTANCE_MIN)
.setCategory(Notification.CATEGORY_SERVICE)
.build()
startForeground(2,notification)
}
initializeLocationManager()
try {
mLocationManager!!.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,LOCATION_INTERVAL.toLong(),LOCATION_disTANCE,mLocationListeners[1])
} catch (ex: java.lang.SecurityException) {
Log.i(TAG,"fail to request location update,ignore",ex)
} catch (ex: IllegalArgumentException) {
Log.d(TAG,"network provider does not exist," + ex.message)
}
try {
mLocationManager!!.requestLocationUpdates(
LocationManager.GPS_PROVIDER,mLocationListeners[0])
} catch (ex: java.lang.SecurityException) {
Log.i(TAG,"gps provider does not exist " + ex.message)
}
}
override fun onDestroy() {
Log.e(TAG,"onDestroy")
super.onDestroy()
val broadcastIntent = Intent(this,SendRestartbroadCastReceiver::class.java)
sendbroadcast(broadcastIntent)`enter code here`
}
private fun initializeLocationManager() {
Log.e(TAG,"initializeLocationManager")
if (mLocationManager == null) {
mLocationManager = applicationContext.getSystemService(Context.LOCATION_SERVICE) as LocationManager
}
}
companion object {
private val TAG = "BOOMBOOMTESTGPS"
private val LOCATION_INTERVAL = 1000
private val LOCATION_disTANCE = 0f
}
inner class LocalBinder : Binder() {
val service: LocationService
get() = this@LocationService
}
}
// 广播接收器
class SendRestartbroadCastReceiver: broadcastReceiver() {
@RequiresApi(Build.VERSION_CODES.O)
override fun onReceive(p0: Context?,p1: Intent?) {
GlobalScope.launch {
p0?.startForegroundService(Intent(p0,LocationService::class.java))
}
}
}
MainActivity.kt
class MainActivity : FlutterActivity() {
private val CHANNEL = "samples.Flutter.dev/battery"
private var permission: Boolean = false
var mService: LocationService? = null
var mBound = false
@RequiresApi(Build.VERSION_CODES.O)
override fun configureFlutterEngine(@NonNull FlutterEngine: FlutterEngine) {
super.configureFlutterEngine(FlutterEngine)
MethodChannel(FlutterEngine.dartExecutor.binaryMessenger,CHANNEL).setMethodCallHandler { call,result ->
if (call.method == "getbatterylevel") {
fn_permission()
if (permission) {
var forService = Intent(this@MainActivity,LocationService::class.java)
GlobalScope.launch {
var forService = Intent(this@MainActivity,LocationService::class.java)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
// startForegroundService(forService);
// Intent(this,MyBoundService::class.java).also { intent ->
// bindService(intent,serviceConnection,Context.BIND_AUTO_CREATE)
// }
// bindService(forService,mConnection,Context.BIND_AUTO_CREATE)
// startService(forService)
startForegroundService(forService)
} else {
startService(forService);
// bindService(forService,Context.BIND_AUTO_CREATE)
}
// runOnUiThread{
// startForegroundService(forService)
// }
}
}
}
}
}
companion object {
const val CHANNEL_ID = "exampleServiceChannel"
private const val REQUEST_PERMISSIONS = 100
}
private fun fn_permission() {
if (ContextCompat.checkSelfPermission(applicationContext,Manifest.permission.ACCESS_FINE_LOCATION) !== PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(applicationContext,Manifest.permission.ACCESS_FINE_LOCATION) !== PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this@MainActivity,Manifest.permission.ACCESS_FINE_LOCATION) && ActivityCompat.shouldShowRequestPermissionRationale(this@MainActivity,Manifest.permission.ACCESS_BACKGROUND_LOCATION) && ActivityCompat.shouldShowRequestPermissionRationale(this@MainActivity,Manifest.permission.ACCESS_COARSE_LOCATION)) {
} else {
ActivityCompat.requestPermissions(this@MainActivity,arrayOf(Manifest.permission.ACCESS_FINE_LOCATION,Manifest.permission.ACCESS_BACKGROUND_LOCATION,Manifest.permission.ACCESS_COARSE_LOCATION
),REQUEST_PERMISSIONS)
}
} else {
permission = true
}
}
override fun onRequestPermissionsResult(requestCode: Int,permissions: Array<out String>,grantResults: IntArray) {
super.onRequestPermissionsResult(requestCode,permissions,grantResults)
when (requestCode) {
REQUEST_PERMISSIONS -> {
if (grantResults.isNotEmpty() && grantResults[0] === PackageManager.PERMISSION_GRANTED) {
permission = true
} else {
Toast.makeText(applicationContext,"Please allow the permission",Toast.LENGTH_LONG).show()
}
}
}
}
private val mConnection: ServiceConnection = object : ServiceConnection {
override fun onServiceConnected(className: ComponentName,service: IBinder) {
// This is called when the connection with the service has been
// established,giving us the service object we can use to
// interact with the service. Because we have bound to a explicit
// service that we kNow is running in our own process,we can
// cast its IBinder to a concrete class and directly access it.
val binder = service as LocationService.LocalBinder
mService = binder.service
mBound = true
}
override fun onServicedisconnected(className: ComponentName) {
// This is called when the connection with the service has been
// unexpectedly disconnected -- that is,its process crashed.
// Because it is running in our same process,we should never
// see this happen.
// mLocationService = null
// Toast.makeText(this@Binding,R.string.local_service_disconnected,// Toast.LENGTH_SHORT).show()
mBound = false
}
}
}
- 我是一名 Flutter 开发人员，对 kotlin 知之甚少，我尝试了谷歌上所有可用的解决方案。很抱歉糟糕的编码风格。其实我现在很绝望。任何可以帮助我的人。我尝试了他在谷歌中可用的所有方法，但几分钟后当我的应用程序处于后台时。我停止发送数据。
- 我什至尝试过使用作业调度程序，但这也不起作用
- 我尝试在 android 中同时使用前台和后台服务
- I Visit this page which is official android page they just update this page on March 11 2021 我尝试了不同的解决方案，但没有奏效
- 任何可以帮助我的机构
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