Flutter 无法在设备上运行应用程序导入 androidx.annotation.Nullable [英] Flutter fail to run app on device import androidx.annotation.Nullable

问题描述

Initializing gradle...
Resolving dependencies...
Gradle task 'assembleDebug'...
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
/Users/ipatel/Documents/AAAA/FlutterSetup/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.9.0/android/src/main/java/io/flutter/plugins/firebase/cloudfirestore/CloudFirestorePlugin.java:9: error: cannot find symbol
import androidx.annotation.NonNull;
                          ^
  symbol:   class NonNull
  location: package androidx.annotation
/Users/ipatel/Documents/AAAA/FlutterSetup/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.9.0/android/src/main/java/io/flutter/plugins/firebase/cloudfirestore/CloudFirestorePlugin.java:10: error: cannot find symbol
import androidx.annotation.Nullable;
                          ^
  symbol:   class Nullable
  location: package androidx.annotation
/Users/ipatel/Documents/AAAA/FlutterSetup/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.9.0/android/src/main/java/io/flutter/plugins/firebase/cloudfirestore/CloudFirestorePlugin.java:253: error: cannot find symbol
          public void onFailure(@NonNull Exception e) {
                                 ^
  symbol: class NonNull
/Users/ipatel/Documents/AAAA/FlutterSetup/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.9.0/android/src/main/java/io/flutter/plugins/firebase/cloudfirestore/CloudFirestorePlugin.java:274: error: cannot find symbol
                    public Void apply(@NonNull Transaction transaction)
                                       ^
  symbol: class NonNull
/Users/ipatel/Documents/AAAA/FlutterSetup/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.9.0/android/src/main/java/io/flutter/plugins/firebase/cloudfirestore/CloudFirestorePlugin.java:272: error: cannot find symbol
                    @Nullable
                     ^
  symbol: class Nullable
/Users/ipatel/Documents/AAAA/FlutterSetup/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.9.0/android/src/main/java/io/flutter/plugins/firebase/cloudfirestore/CloudFirestorePlugin.java:503: error: cannot find symbol
                    public void onFailure(@NonNull Exception e) {
                                           ^
  symbol: class NonNull
/Users/ipatel/Documents/AAAA/FlutterSetup/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.9.0/android/src/main/java/io/flutter/plugins/firebase/cloudfirestore/CloudFirestorePlugin.java:558: error: cannot find symbol
                    public void onFailure(@NonNull Exception e) {
                                           ^
  symbol: class NonNull
7 errors

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':cloud_firestore:compileDebugJavaWithJavac'.
> 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 4s
Finished with error: Gradle task assembleDebug failed with exit code 1

不知道为什么发现上述错误?我只是尝试在我的系统中连接设备并运行.

Don't know why Above Error found? I just try to connect device in my system and run.

以前我尝试在没有安装 Android Studio 的情况下通过 VS Code 在设备上运行应用程序.所以我关注了 https://medium.com/@aubykhan/setting-up-flutter-without-android-studio-6f7abdeb353c 本教程并通过终端手动安装 Gradle.

Perviously I tried to run app on device by VS Code without Android Studio Installed. So I have followed https://medium.com/@aubykhan/setting-up-flutter-without-android-studio-6f7abdeb353c this tutorial and manually installed Gradle by terminal.

以下是我的终端的一些历史:

Below are some history of my terminal:

431 brew install gradle
432 brew cask 安装 java
第433话434颤振配置--gradle-dir/usr/local/opt/gradle
435颤动--版本
436清晰
437扑医生
第 438 章第439话440 打开 $HOME/.bash_profile

431 brew install gradle
432 brew cask install java
433 brew install gradle
434 flutter config --gradle-dir /usr/local/opt/gradle
435 flutter --version
436 clear
437 flutter doctor
438 sdkmanager "system-images;android-21;default;x86_64"
439 vi ~/.bash_profile
440 Open $HOME/.bash_profile

我认为问题可能是系统找到了 Gradle 的两条路径还是其他问题?不知道，但我该如何解决这个问题?

I thought issue might be is system found two path of Gradle or issue are others? Don't know but how can I figure out this issue ?

推荐答案

如受影响官方插件的更新日志中所述，您需要迁移到 AndroidX https://pub.dartlang.org/packages/firebase_core#030

You need to migrate to AndroidX as mentioned in the Changelog of affected official plugins https://pub.dartlang.org/packages/firebase_core#030

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