The app crashes when I try to apply an image as wallpaper with the error :

E/flutter (18158): 	at com.divyanshu.chitr.MainActivity.access$setWallpaper(MainActivity.kt:18)
E/flutter (18158): 	at com.divyanshu.chitr.MainActivity$onCreate$1.onMethodCall(MainActivity.kt:27)
E/flutter (18158): 	at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:222)
E/flutter (18158): 	at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:96)
E/flutter (18158): 	at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:656)
E/flutter (18158): 	at android.os.MessageQueue.nativePollOnce(Native Method)
E/flutter (18158): 	at android.os.MessageQueue.next(MessageQueue.java:328)
E/flutter (18158): 	at android.os.Looper.loop(Looper.java:164)
E/flutter (18158): 	at android.app.ActivityThread.main(ActivityThread.java:5737)
E/flutter (18158): 	at java.lang.reflect.Method.invoke(Native Method)
E/flutter (18158): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
E/flutter (18158): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)
E/flutter (18158):
F/flutter (18158): [FATAL:flutter/shell/platform/android/platform_view_android_jni.cc(76)] Check failed: CheckException(env).

This issue doesnt appear if I change wm?.setBitmap(bitmap, null, true, wallpaperType) to wm?.setBitmap(bitmap) but that way I can only set the home screen wallpaper.

If the main() function runs some async code, we get an error in the latest version of Flutter:

Unhandled Exception: ServicesBinding.defaultBinaryMessenger was accessed before the binding was initialized. If you're running an application and need to access the binary messenger beforerunApp()has been called (for example, during plugin initialization), then you need to explicitly call theWidgetsFlutterBinding.ensureInitialized()first. If you're running a test, you can call theTestWidgetsFlutterBinding.ensureInitialized()as the first line in your test'smain()method to initialize the binding. #0 defaultBinaryMessenger.<anonymous closure> (package:flutter/src/services/binary_messenger.dart:73:7) #1 defaultBinaryMessenger (package:flutter/src/services/binary_messenger.dart:86:4) #2 MethodChannel.binaryMessenger (package:flutter/src/services/platform_channel.dart:140:62) #3 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:314:35) <asynchronous suspension> #4 MethodChannel.invokeMapMethod (package:f<…>

Error is fixed by adding the mentioned line of code.

Warning ────────────────────────────────────────────────────────────────────────────── Your Flutter application is created using an older version of the Android embedding. It's being deprecated in favor of Android embedding v2. Follow the steps at

https://flutter.dev/go/android-project-migration

to migrate your project. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Launching lib\main.dart on SM J100F in debug mode... [!] Your app isn't using AndroidX. To avoid potential build failures, you can quickly migrate your app by following the steps on https://goo.gl/CP92wY .

Hi, I read your article from medium.com thanks for your sharing, I have learn many things. I have an error, could you help me?

Under the android folder /MainActivity.kt Kotlin file throws an error.

I tried these below:

flutter clean flutter pub cache repair I read about other type mismatch error questions from here but unfortunately not found anything.

Any help appriciated. My code is as below.

    package com.combasis.wallpaper_son_app
import android.os.Bundle
import io.flutter.app.FlutterActivity
import io.flutter.plugin.common.MethodChannel
import io.flutter.plugins.GeneratedPluginRegistrant
import java.io.IOException
import android.app.WallpaperManager
import android.graphics.BitmapFactory
import java.io.File
import android.os.Build
import android.annotation.TargetApi
import android.content.Context
import io.flutter.Log

private const val CHANNEL = "com.combasis.wallpaper_son_app"
class MainActivity: FlutterActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        GeneratedPluginRegistrant.registerWith(this)

    MethodChannel(flutterView, CHANNEL).setMethodCallHandler { call, result ->
        if (call.method == "setWallpaper") {
            val arguments = call.arguments as ArrayList<*>
            val setWallpaper = setWallpaper(arguments[0] as String, applicationContext, arguments[1] as Int)

            if (setWallpaper == 0) {
                result.success(setWallpaper)
            } else {
                result.error("UNAVAILABLE", "", null)
            }
        } else {
            result.notImplemented()
        }
    }
}

While trying to run on IOS simulator this getting this error

No application found for TargetPlatform.ios. Is your project missing an ios/Runner/Info.plist? Consider running "flutter create ." to create one.