Flutter_file_picker: PlatformException: File picker is already active

[doomkin]

In the release version, the file selection dialog is not called, and an exception occurs when calling it again. The debug version is fine. Flutter is upgraded and cleared.

PlatformException(already_active, File picker is already active, null, null)

[miguelpruivo]

@doomkin please post more details, such as Flutter version, simulator used, file picker version etc.

[doomkin]

Flutter 1.22.3 • channel stable
Dart 2.10.3
targetSdkVersion 29
file_picker 2.0.12
Running on Xiaomi Mi 9T, users found an error on their other devices. The error occurred after upgrading Flutter and dependencies.

[miguelpruivo]

@doomkin looks like a dumb question, but have you tried cleaning and building again from scratch?

[doomkin]

A good suggestion to clean and rebuild everything again, I have no other ideas :) If the error appeared under debugging, it would be clear in which direction to investigate the problem.

rm -R --force .pub-cache
flutter clean
flutter pub get
flutter pub upgrade
flutter pub run build_runner build --delete-conflicting-outputs
flutter build apk --target-platform android-arm64 --debug

app-debug.apk works fine (and app-profile.apk too)

flutter build apk --target-platform android-arm64

app-release.apk falls

[doomkin]

I used permission_handler 5.0.1+1, placed a rights request before calling file picker

  if (!(await Permission.storage.request().isGranted)) {
    throw l10n.permissionDenied;
  }
  FilePickerResult result = await FilePicker.platform.pickFiles(
    type: FileType.custom,
    allowedExtensions: ['csv'],
  );

now I get an exception MissingPluginException(No implementation found for method requestPermission on channel flutter.baseflow.com/permissions/methods)
Before that, I made a request for rights before opening the file. It looks like the rights request is broken.

  if (!(await Permission.storage.request().isGranted)) {
    throw l10n.permissionDenied;
  }
  final file = File(result.files.single.path);

[doomkin]

I re-created the Flutter project, copied files from the old project there, and now it's not going to build

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:processDebugResources'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
   > Android resource linking failed
     /home/pa/data/devel/timesheets/build/file_picker/intermediates/library_manifest/debug/AndroidManifest.xml:9:5-15:15: AAPT: error: unexpected element <queries> found in <manifest>.


* 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 21s
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 file_picker...
Running Gradle task 'assembleAarRelease'...

/home/pa/.pub-cache/hosted/pub.dartlang.org/file_picker-2.0.12/android/src/main/java/com/mr/flutter/plugin/filepicker/FilePickerPlugin.java:10: error: cannot find symbol
import androidx.lifecycle.DefaultLifecycleObserver;
                         ^
  symbol:   class DefaultLifecycleObserver
  location: package androidx.lifecycle
/home/pa/.pub-cache/hosted/pub.dartlang.org/file_picker-2.0.12/android/src/main/java/com/mr/flutter/plugin/filepicker/FilePickerPlugin.java:20: error: cannot find symbol
import io.flutter.embedding.engine.plugins.lifecycle.FlutterLifecycleAdapter;
                                                    ^
  symbol:   class FlutterLifecycleAdapter
  location: package io.flutter.embedding.engine.plugins.lifecycle
/home/pa/.pub-cache/hosted/pub.dartlang.org/file_picker-2.0.12/android/src/main/java/com/mr/flutter/plugin/filepicker/FilePickerPlugin.java:38: error: cannot find symbol
            implements Application.ActivityLifecycleCallbacks, DefaultLifecycleObserver {
                                                               ^
  symbol:   class DefaultLifecycleObserver
  location: class FilePickerPlugin
/home/pa/.pub-cache/hosted/pub.dartlang.org/file_picker-2.0.12/android/src/main/java/com/mr/flutter/plugin/filepicker/FilePickerPlugin.java:45: error: method does not override or implement a method from a supertype
        @Override
        ^
/home/pa/.pub-cache/hosted/pub.dartlang.org/file_picker-2.0.12/android/src/main/java/com/mr/flutter/plugin/filepicker/FilePickerPlugin.java:49: error: method does not override or implement a method from a supertype
        @Override
        ^
/home/pa/.pub-cache/hosted/pub.dartlang.org/file_picker-2.0.12/android/src/main/java/com/mr/flutter/plugin/filepicker/FilePickerPlugin.java:53: error: method does not override or implement a method from a supertype
        @Override
        ^
/home/pa/.pub-cache/hosted/pub.dartlang.org/file_picker-2.0.12/android/src/main/java/com/mr/flutter/plugin/filepicker/FilePickerPlugin.java:57: error: method does not override or implement a method from a supertype
        @Override
        ^
/home/pa/.pub-cache/hosted/pub.dartlang.org/file_picker-2.0.12/android/src/main/java/com/mr/flutter/plugin/filepicker/FilePickerPlugin.java:61: error: method does not override or implement a method from a supertype
        @Override
        ^
/home/pa/.pub-cache/hosted/pub.dartlang.org/file_picker-2.0.12/android/src/main/java/com/mr/flutter/plugin/filepicker/FilePickerPlugin.java:66: error: method does not override or implement a method from a supertype
        @Override
        ^
/home/pa/.pub-cache/hosted/pub.dartlang.org/file_picker-2.0.12/android/src/main/java/com/mr/flutter/plugin/filepicker/FilePickerPlugin.java:277: error: cannot find symbol
            this.lifecycle = FlutterLifecycleAdapter.getActivityLifecycle(activityBinding);
                             ^
  symbol:   variable FlutterLifecycleAdapter
  location: class FilePickerPlugin
/home/pa/.pub-cache/hosted/pub.dartlang.org/file_picker-2.0.12/android/src/main/java/com/mr/flutter/plugin/filepicker/FilePickerPlugin.java:278: error: incompatible types: FilePickerPlugin.LifeCycleObserver cannot be converted to LifecycleObserver
            this.lifecycle.addObserver(this.observer);
                                           ^
/home/pa/.pub-cache/hosted/pub.dartlang.org/file_picker-2.0.12/android/src/main/java/com/mr/flutter/plugin/filepicker/FilePickerPlugin.java:287: error: incompatible types: FilePickerPlugin.LifeCycleObserver cannot be converted to LifecycleObserver
            this.lifecycle.removeObserver(this.observer);
                                              ^
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
12 errors

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':compileReleaseJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

* 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 0s

Exception: The plugin file_picker could not be built due to the issue above.

[doomkin]

Fixed the dependency versions and everything worked!
android/gradle/wrapper/gradle-wrapper.properties:

distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip

android/build.gradle:

    dependencies {
        classpath 'com.android.tools.build:gradle:3.6.4'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }