flutterlocation
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Lyokone
Can't build with Android API 31
When trying to build with compileSdkVersion 31 I'm always getting the following error:
Launching lib\main.dart on Android SDK built for x86 in debug mode...
e: C:\flutter\.pub-cache\hosted\pub.dartlang.org\location-4.3.0\android\src\main\java\com\lyokone\location\FlutterLocationService.kt: (124, 1): Class 'FlutterLocationService' is not abstract and does not implement abstract member public abstract fun onRequestPermissionsResult(p0: Int, p1: Array<(out) String!>, p2: IntArray): Boolean defined in io.flutter.plugin.common.PluginRegistry.RequestPermissionsResultListener
e: C:\flutter\.pub-cache\hosted\pub.dartlang.org\location-4.3.0\android\src\main\java\com\lyokone\location\FlutterLocationService.kt: (258, 5): 'onRequestPermissionsResult' overrides nothing
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':location:compileDebugKotlin'.
When building with compileSdkVersion 30 this error doesn't' occur.
Currently using kotlin 1.6.10 and gradle 4.1.0.
Temporary fix:
Search for the FlutterLocationService.kt and edit it
change
override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>?, grantResults: IntArray?): Boolean
to
override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray): Boolean
I just solved it
i open android project in android studio and i transfer screen to that screen and solve by sign (!) in android studio and this is the code after repair by android studio LOCATION FILE
/Users/gustysetyono/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/location-4.3.0/android/src/main/java/com/lyokone/location
CODE:
package com.lyokone.location
import android.Manifest
import android.app.*
import android.content.ActivityNotFoundException
import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.os.Binder
import android.os.Build
import android.os.IBinder
import android.util.Log
import androidx.core.app.ActivityCompat
import androidx.core.app.NotificationCompat
import androidx.core.app.NotificationManagerCompat
import io.flutter.plugin.common.MethodChannel
import io.flutter.plugin.common.PluginRegistry
const val kDefaultChannelName: String = "Location background service"
const val kDefaultNotificationTitle: String = "Location background service running"
const val kDefaultNotificationIconName: String = "navigation_empty_icon"
data class NotificationOptions(
val channelName: String = kDefaultChannelName,
val title: String = kDefaultNotificationTitle,
val iconName: String = kDefaultNotificationIconName,
val subtitle: String? = null,
val description: String? = null,
val color: Int? = null,
val onTapBringToFront: Boolean = false
)
class BackgroundNotification(
private val context: Context,
private val channelId: String,
private val notificationId: Int
) {
private var options: NotificationOptions = NotificationOptions()
private var builder: NotificationCompat.Builder = NotificationCompat.Builder(context, channelId)
.setPriority(NotificationCompat.PRIORITY_HIGH)
init {
updateNotification(options, false)
}
private fun getDrawableId(iconName: String): Int {
return context.resources.getIdentifier(iconName, "drawable", context.packageName)
}
private fun buildBringToFrontIntent(): PendingIntent? {
val intent: Intent? = context.packageManager
.getLaunchIntentForPackage(context.packageName)
?.setPackage(null)
?.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED)
return if (intent != null) {
PendingIntent.getActivity(context, 0, intent, 0)
} else {
null
}
}
private fun updateChannel(channelName: String) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
val notificationManager = NotificationManagerCompat.from(context)
val channel = NotificationChannel(
channelId,
channelName,
NotificationManager.IMPORTANCE_NONE
).apply {
lockscreenVisibility = Notification.VISIBILITY_PRIVATE
}
notificationManager.createNotificationChannel(channel)
}
}
private fun updateNotification(
options: NotificationOptions,
notify: Boolean
) {
val iconId = getDrawableId(options.iconName).let {
if (it != 0) it else getDrawableId(kDefaultNotificationIconName)
}
builder = builder
.setContentTitle(options.title)
.setSmallIcon(iconId)
.setContentText(options.subtitle)
.setSubText(options.description)
builder = if (options.color != null) {
builder.setColor(options.color).setColorized(true)
} else {
builder.setColor(0).setColorized(false)
}
builder = if (options.onTapBringToFront) {
builder.setContentIntent(buildBringToFrontIntent())
} else {
builder.setContentIntent(null)
}
if (notify) {
val notificationManager = NotificationManagerCompat.from(context)
notificationManager.notify(notificationId, builder.build())
}
}
fun updateOptions(options: NotificationOptions, isVisible: Boolean) {
if (options.channelName != this.options.channelName) {
updateChannel(options.channelName)
}
updateNotification(options, isVisible)
this.options = options
}
fun build(): Notification {
updateChannel(options.channelName)
return builder.build()
}
}
class FlutterLocationService : Service(), PluginRegistry.RequestPermissionsResultListener {
companion object {
private const val TAG = "FlutterLocationService"
private const val REQUEST_PERMISSIONS_REQUEST_CODE: Int = 641
private const val ONGOING_NOTIFICATION_ID = 75418
private const val CHANNEL_ID = "flutter_location_channel_01"
}
// Binder given to clients
private val binder = LocalBinder()
// Service is foreground
private var isForeground = false
private var activity: Activity? = null
private var backgroundNotification: BackgroundNotification? = null
var location: FlutterLocation? = null
private set
// Store result until a permission check is resolved
var result: MethodChannel.Result? = null
val locationActivityResultListener: PluginRegistry.ActivityResultListener?
get() = location
val locationRequestPermissionsResultListener: PluginRegistry.RequestPermissionsResultListener?
get() = location
val serviceRequestPermissionsResultListener: PluginRegistry.RequestPermissionsResultListener?
get() = this
inner class LocalBinder : Binder() {
fun getService(): FlutterLocationService = this@FlutterLocationService
}
override fun onCreate() {
super.onCreate()
Log.d(TAG, "Creating service.")
location = FlutterLocation(applicationContext, null)
backgroundNotification = BackgroundNotification(
applicationContext,
CHANNEL_ID,
ONGOING_NOTIFICATION_ID
)
}
override fun onBind(intent: Intent?): IBinder? {
Log.d(TAG, "Binding to location service.")
return binder
}
override fun onUnbind(intent: Intent?): Boolean {
Log.d(TAG, "Unbinding from location service.")
return super.onUnbind(intent)
}
override fun onDestroy() {
Log.d(TAG, "Destroying service.")
location = null
backgroundNotification = null
super.onDestroy()
}
fun checkBackgroundPermissions(): Boolean {
return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
activity?.let {
val locationPermissionState = ActivityCompat.checkSelfPermission(it,
Manifest.permission.ACCESS_BACKGROUND_LOCATION)
locationPermissionState == PackageManager.PERMISSION_GRANTED
} ?: throw ActivityNotFoundException()
} else {
location?.checkPermissions() ?: false
}
}
fun requestBackgroundPermissions() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
activity?.let {
ActivityCompat.requestPermissions(it, arrayOf(
Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.ACCESS_BACKGROUND_LOCATION),
REQUEST_PERMISSIONS_REQUEST_CODE)
} ?: throw ActivityNotFoundException()
} else {
location?.result = this.result
location?.requestPermissions()
// result passed to Location reference here won't be needed
this.result = null
}
}
fun isInForegroundMode(): Boolean = isForeground
fun enableBackgroundMode() {
if (isForeground) {
Log.d(TAG, "Service already in foreground mode.")
} else {
Log.d(TAG, "Start service in foreground mode.")
val notification = backgroundNotification!!.build()
startForeground(ONGOING_NOTIFICATION_ID, notification)
isForeground = true
}
}
fun disableBackgroundMode() {
Log.d(TAG, "Stop service in foreground.")
stopForeground(true)
isForeground = false
}
fun changeNotificationOptions(options: NotificationOptions): Map<String, Any>? {
backgroundNotification?.updateOptions(options, isForeground)
return if (isForeground)
mapOf("channelId" to CHANNEL_ID, "notificationId" to ONGOING_NOTIFICATION_ID)
else
null
}
fun setActivity(activity: Activity?) {
this.activity = activity
location?.setActivity(activity)
}
override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray): Boolean {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q && requestCode == REQUEST_PERMISSIONS_REQUEST_CODE && permissions!!.size == 2 &&
permissions[0] == Manifest.permission.ACCESS_FINE_LOCATION && permissions[1] == Manifest.permission.ACCESS_BACKGROUND_LOCATION) {
if (grantResults!![0] == PackageManager.PERMISSION_GRANTED && grantResults[1] == PackageManager.PERMISSION_GRANTED) {
// Permissions granted, background mode can be enabled
enableBackgroundMode()
result?.success(1)
result = null
} else {
if (!shouldShowRequestBackgroundPermissionRationale()) {
result?.error("PERMISSION_DENIED_NEVER_ASK",
"Background location permission denied forever - please open app settings", null)
} else {
result?.error("PERMISSION_DENIED", "Background location permission denied", null)
}
result = null
}
}
return false
}
private fun shouldShowRequestBackgroundPermissionRationale(): Boolean =
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
activity?.let {
ActivityCompat.shouldShowRequestPermissionRationale(it, Manifest.permission.ACCESS_BACKGROUND_LOCATION)
} ?: throw ActivityNotFoundException()
} else {
false
}
}
@uemirhanselim had this issue when I updated to flutter latest, once i switched to the stable version issue was resolved.
[✓] Flutter (Channel stable, 2.10.4, on Ubuntu 20.04.2 LTS 5.4.0-107-generic, locale en_AU.UTF-8)
Same problem. Manually editing /Users/gustysetyono/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/location-4.3.0/android/src/main/java/com/lyokone/location helped. Thanks @gustysetyono
@demimola24 I'm more interested in knowing about how did you find the solution to this, care to explain?
Temporary fix: Search for the FlutterLocationService.kt and edit it change
override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>?, grantResults: IntArray?): Booleanto
override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray): Boolean
@demimola24 thanks, its work for me. and can you expalin why? is this because null-safety?
After suffering a lot with this problem, I decided to isolate the problematic package and that's when the run returned a different error asking me to activate MultiDex, but in my case it was already enabled but incorrectly. Oh, this video helped me. https://www.youtube.com/watch?v=x8k3q64uJnk
/Users/gustysetyono/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/location-4.3.0/android/src/main/java/com/lyokone/location
linux /Users/gustysetyono/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/location-4.3.0/android/src/main/java/com/lyokone/location
windows direcory-to-your-flutter/.pub-cache/hosted/pub.dartlang.org/location-4.3.0/android/src/main/java/com/lyokone/location
