I wanted to make some operations while the app was not running, so I decided to use the background fetch package.I followed the android setup step by step This is part of my pubspec.yaml
version: 1.0.0+1
environment:
sdk: ">=2.1.0 <3.0.0"
dependencies:
flutter:
sdk: flutter
google_maps_flutter: ^0.5.16
geolocator: ^5.1.1
flutter_local_notifications: ^0.7.1+1
shared_preferences: '0.5.6+3'
background_fetch: '^0.5.1'
This is part of my AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="firenzepuliziastrade.firenze_pulizia_strade">
<!-- 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. -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<application
tools:replace="android:label"
android:name="io.flutter.app.FlutterApplication"
android:label="Firenze Pulizia Strade"
android:icon="@mipmap/ic_launcher">
This is part of my app/build.gradle
android {
compileSdkVersion rootProject.ext.compileSdkVersion
defaultConfig {
// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
applicationId "firenzepuliziastrade.firenze_pulizia_strade"
minSdkVersion 16
targetSdkVersion rootProject.ext.targetSdkVersion
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test:runner:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
}
This is part of my android/build.gradle
buildscript {
ext.kotlin_version = '1.3.50'
ext {
compileSdkVersion = 28 // or higher
targetSdkVersion = 28 // or higher
appCompatVersion = "1.1.0" // or higher
}
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.5.0'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}
allprojects {
repositories {
google()
jcenter()
maven {
// [required] background_fetch
url "${project(':background_fetch').projectDir}/libs"
}
}
}
This is my gradle.properties
org.gradle.jvmargs=-Xmx1536M
android.enableR8=true
android.useAndroidX=true
android.enableJetifier=true
I tried even the additional step to enable the Headless mechanism even though I thought that it was not necessary since my flutter version is Flutter 1.12.13 and I created this project recently. But all that said I could not make the app do some work while not running, it just worked while being in the background. So I thought that the reason was that I was launching the app in debug mode and I tried to launch it in release mode, but I got the following error:
Launching lib/main.dart on POT LX1 in release mode...
Running Gradle task 'assembleRelease'...
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':path_provider:verifyReleaseResources'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
> Android resource linking failed
/home/nik/.gradle/caches/transforms-2/files-2.1/0a271e99b6771ad4a84318244d532fb7/core-1.0.0/res/values/values.xml:57:5-88:25: AAPT: error: resource android:attr/fontVariationSettings not found.
/home/nik/.gradle/caches/transforms-2/files-2.1/0a271e99b6771ad4a84318244d532fb7/core-1.0.0/res/values/values.xml:57:5-88:25: AAPT: error: resource android:attr/ttcIndex not found.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 7s
The built failed likely due to AndroidX incompatibilities in a plugin. The tool is about to try using Jetfier to solve the incompatibility.
Building plugin background_fetch...
Running Gradle task 'assembleAarRelease'...
Finished with error: ProcessException: Permission denied
Command: /home/nik/Desktop/Pulizia_Strade/flutter/.pub-cache/hosted/pub.dartlang.org/background_fetch-0.5.6/android/gradlew -I=/home/nik/Desktop/Pulizia_Strade/flutter/packages/flutter_tools/gradle/aar_init_script.gradle -Pflutter-root=/home/nik/Desktop/Pulizia_Strade/flutter -Poutput-dir=/home/nik/Desktop/Pulizia_Strade/firenze_pulizia_strade/build/app -Pis-plugin=true -Ptarget-platform=android-arm,android-arm64,android-x64 assembleAarRelease
I tried to create a new flutter project, specifying androidx, but it did notwork, I got the same error. Can someone help me, I really do not know what to do at this point...
