How run background process with the work manager in flutter?

Question

I want to work with Flutter Workmanager, I did the cited configuration in my .kt like that

package com.example.mybackprocess

import be.tramckrijte.workmanager.W         


        

Answer 1

There are something wrong with the documentation. You can try with this

Don't remove your .MainActivity.kt, instead remove your .App class.

MainActivity.kt

package your_package_name

import androidx.annotation.NonNull
import io.flutter.embedding.android.FlutterActivity 
import io.flutter.embedding.engine.FlutterEngine    
import io.flutter.plugins.GeneratedPluginRegistrant 

class MainActivity: FlutterActivity() { 
    override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {    
        GeneratedPluginRegistrant.registerWith(flutterEngine);  
    }   
}

AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="your_package_name">

    <uses-permission android:name="android.permission.INTERNET" />

    <!-- io.flutter.app.FlutterApplication is an android.app.Application that
         calls FlutterMain.startInitialization(this); in its onCreate method.
         In most cases you can leave this as-is, but you if you want to provide
         additional functionality it is fine to subclass or reimplement
         FlutterApplication and put your custom class here. -->
    <application android:label="xxx" android:usesCleartextTraffic="true" android:icon="@mipmap/ic_launcher">
        <activity android:name=".MainActivity" android:launchMode="singleTop" android:theme="@style/LaunchTheme" android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode" android:hardwareAccelerated="true" android:windowSoftInputMode="adjustResize">
            <!-- This keeps the window background of the activity showing
                 until Flutter renders its first frame. It can be removed if
                 there is no splash screen (such as the default splash screen
                 defined in @style/LaunchTheme). -->
            <!-- <meta-data android:name="io.flutter.app.android.SplashScreenUntilFirstFrame" android:value="true" /> -->
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>

            <intent-filter>
                <action android:name="FLUTTER_NOTIFICATION_CLICK"/>
                <category android:name="android.intent.category.DEFAULT"/>
            </intent-filter>

            <meta-data android:name="io.flutter.embedding.android.SplashScreenDrawable" android:resource="@drawable/launch_background" />

            <!-- Theme to apply as soon as Flutter begins rendering frames -->
            <meta-data android:name="io.flutter.embedding.android.NormalTheme" android:resource="@style/NormalTheme" />

        </activity>

        <meta-data android:name="flutterEmbedding" android:value="2" />

    </application>
</manifest>

styles.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
        <!-- Show a splash screen on the activity. Automatically removed when
             Flutter draws its first frame -->
        <item name="android:windowBackground">@drawable/launch_background</item>
    </style>

    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
    <item name="android:windowBackground">@drawable/launch_background</item>
</style>
</resources>