How can I use plugin inside callback?

[vimalmistry]

I want to call api on location change. I want to attach JWT_TOKEN which is stored in shared preferences. I am facing.

E/flutter (10000): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences)

[RomanJos]

Can you show LocationService.kt ? Look like you didn't do the step 3 of Android. At the moment we can't use plugins on IOS by the way

[vimalmistry]

@RomanJos I followed all 3 steps.
I created Application.kt and configured in manifest.xml.
I am not familiar with native programming.
Why IOS is not working? there is steps for configure in IOS.

[mehdok]

@vimalmistry The Document and the code need to be updated, I will do it this weekend. Please be hold until then.

[vimalmistry]

@mehdok ohh :( Did you updated doc? I found some new informations in readme.md
One question. What is requirement of minimum android version? My client complaints it is not working on their older devices!

[mehdok]

Minimum android sdk is 16.

[RomanJos]

Actually I modified the README 3 days ago so make sure to match changes on your project, it may resolve your issues 😉
I'm using it on a real Android 4.4.2 (API 19) and it work well I only have issue setting the accuracy to HIGH so I left it to NAVIGATION

[mehdok]

@RomanJos Sorry your changes in document isn't merged yet. If there is something that can help @vimalmistry please copy paste it here.

[RomanJos]

No I mean the one that are already merged

I created Application.kt and configured in manifest.xml.

Its LocationService.kt on the readme

[vimalmistry]

Thanks for replies. I actually configured using old doc (Application.kt). It works very well in most devices Except some devices and also I can not run it on emulator. But in physical device it works. But I found service is terminated after reboot. Is there any quick fix to auto start on reboot.
I am not a native developer. So I don't know much about .kt and .java file. I am just copy pasting every time.😇

[RomanJos]

Thats strange it work on some devices but not even on the emulator, have you tried to run the example ? Starting at boot mean that we need a way to start the plugin directly from kotlin and not dart and I think it would require a lot of changes idk

And i do the same lol

[mehdok]

@vimalmistry I'm not sure why you can not get it working on some device or simulator, But I can confirm that the plugin is working fine on simulator, both Android and iOS.

On Android I can add the RECEIVE_BOOT_COMPLETED, it's not that hard to restart service when device rebooting, But it is something that only Android supports, as I know there is no similar feature on iOS, so for keeping everything equal I won't do it.

[TahaMalas]

Thanks for replies. I actually configured using old doc (Application.kt). It works very well in most devices Except some devices and also I can not run it on emulator. But in physical device it works. But I found service is terminated after reboot. Is there any quick fix to auto start on reboot.
I am not a native developer. So I don't know much about .kt and .java file. I am just copy pasting every time.😇

Hey, can you tell me how you managed to solve the issue? I'm getting the same problem with SharedPreferences package, while I'm trying to use it on the static callback function

[gpibarra]

Have you followed the steps in the documentation?

https://github.com/rekab-app/background_locator/wiki/Use-other-plugins-in-callback

[khairu-aqsara]

i have same case and problem with you, but i follow step on https://github.com/rekab-app/background_locator/wiki/Use-other-plugins-in-callback and it's work, here is my Application.kt

import io.flutter.app.FlutterApplication
import io.flutter.plugin.common.PluginRegistry
import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback
import io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin;
import io.flutter.view.FlutterMain
import rekab.app.background_locator.LocatorService

class Application : FlutterApplication(), PluginRegistrantCallback {
    override fun onCreate() {
        super.onCreate()
        LocatorService.setPluginRegistrant(this)
        FlutterMain.startInitialization(this)
    }

    override fun registerWith(registry: PluginRegistry?) {
        if (!registry!!.hasPlugin("io.flutter.plugins.sharedpreferences")) {
            SharedPreferencesPlugin.registerWith(registry!!.registrarFor("io.flutter.plugins.sharedpreferences"))
        }
    }
}

and change the Manifestfile.

<application
        android:name=".Application"

you need add shared pref plugin,change

import io.flutter.plugins.pathprovider.PathProviderPlugin

to this

import io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin;

and change

if (!registry!!.hasPlugin("io.flutter.plugins.pathprovider")) {
    PathProviderPlugin.registerWith(registry!!.registrarFor("io.flutter.plugins.pathprovider"))
 }

to this

 if (!registry!!.hasPlugin("io.flutter.plugins.sharedpreferences")) {     
   SharedPreferencesPlugin.registerWith(registry!!.registrarFor("io.flutter.plugins.sharedpreferences"))
}

and in the static callback just use the shared pref plugin as usual

SharedPreferences prefs = await SharedPreferences.getInstance();
String somthing = prefs.getString('somthing');

[wemersonrv]

@vimalmistry I'm not sure why you can not get it working on some device or simulator, But I can confirm that the plugin is working fine on simulator, both Android and iOS.

On Android I can add the RECEIVE_BOOT_COMPLETED, it's not that hard to restart service when device rebooting, But it is something that only Android supports, as I know there is no similar feature on iOS, so for keeping everything equal I won't do it.

@mehdok Any chance to convince you to make this implementation for Android?

Almost 90% here in Brazil are android devices: https://gs.statcounter.com/os-market-share/mobile/brazil

And worldwide is not so different: https://gs.statcounter.com/os-market-share/mobile/worldwide

[mehdok]

@wemersonrv I think I can do that this weekend.

[MazEbeid]

Below is the Java equivalent to the above if your project doesn't support Kotlin

<YOUR PACKAGE NAME HERE>
import io.flutter.app.FlutterApplication;
import io.flutter.plugin.common.PluginRegistry;
import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback;
import io.flutter.plugins.GeneratedPluginRegistrant;
import rekab.app.background_locator.LocatorService;
import io.flutter.plugins.firebase.cloudfunctions.CloudFunctionsPlugin;
import io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin;

public class Application extends FlutterApplication implements PluginRegistrantCallback {
        @Override
        public void onCreate() {
                super.onCreate();
                LocatorService.setPluginRegistrant(this);
        }
        @Override
        public void registerWith(PluginRegistry registry) {

                final String sharedPrefKey = "io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin";
                final String functionsKey = "io.flutter.plugins.firebase.cloudfunctions.CloudFunctionsPlugin";
                if(!alreadyRegisteredWith(registry,sharedPrefKey))
                {
                   SharedPreferencesPlugin.registerWith(registry.registrarFor("io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin"));
                }
                if(!alreadyRegisteredWith(registry,functionsKey))
                {
                        CloudFunctionsPlugin.registerWith(registry.registrarFor("io.flutter.plugins.firebase.cloudfunctions.CloudFunctionsPlugin"));
                }
        }
        private static boolean alreadyRegisteredWith(PluginRegistry registry, String key) {
                if (registry.hasPlugin(key)) {
                        return true;
                }else{
                        return false;
                }

        }

}

[ozz-rjq]

@MazEbeid thanks! can you help with ios configuration?

[MazEbeid]

I have no experience with iOS but this is very important to me at the moment so I am spending time on it and I will look into how I can contribute more. I have tested last night the plugin while the app was in the background for 2hrs and I got a ping on iOS every 1 second or two. I was out for 2 hrs and spent an hour whole the phone was locked and stationary and still got some good pings. I will be moving on to trying to get this to work while the app is suspended. I think to start with I need to figure out if this is something that can be done by firing a background service .. the problem with those is that they cant be faster than 15minutes and also this is not guaranteed and depends on how the OS prioritises your app.

…

On Sat, 13 Jun 2020, 07:07 Taras Tataryn, ***@***.***> wrote: @MazEbeid <https://github.com/MazEbeid> thanks! can you help with ios configuration? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#34 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKAXPSUS54HNWHBI5GSF63DRWMJT5ANCNFSM4ME5WDDQ> .

[mehdok]

@MazEbeid @ozz-rjq There is a bug with iOS that prevent the app to get a gps fix while app is terminated in iOS (or at least get a fix every 500 meter or so). Also there is a PR #59 which address this issue, but there is a bug with that too. It would be appreciated if anyone can help with that.