添加 Pushe 插件时找不到符号@NonNull

Question

我想为 flutter 安装 Pushe plugin，但出现此错误：

我什至将这一行添加到本机导入中：

import android.support.annotation.NonNull;

但得到同样的异常。

我该怎么做才能解决这个问题？

这是我的堆栈跟踪：

Launching lib\main.dart on Android SDK built for x86 in debug mode...
Initializing gradle...
Resolving dependencies...
Running Gradle task 'assembleDebug'...
C:\Users\Elyas\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\pushe-1.0.0\android\src\main\java\co\ronash\pushe\flutter\PushePlugin.java:49: error: cannot find symbol
    public void onMethodCall(@NonNull MethodCall call, @NonNull Result result) {
                              ^
  symbol:   class NonNull
  location: class PushePlugin
C:\Users\Elyas\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\pushe-1.0.0\android\src\main\java\co\ronash\pushe\flutter\PushePlugin.java:49: error: cannot find symbol
    public void onMethodCall(@NonNull MethodCall call, @NonNull Result result) {
                                                        ^
  symbol:   class NonNull
  location: class PushePlugin
C:\Users\Elyas\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\pushe-1.0.0\android\src\main\java\co\ronash\pushe\flutter\PusheApplication.java:28: error: cannot find symbol
            public void onNotificationReceived(@NonNull final NotificationData notificationData) {
                                                ^
  symbol: class NonNull
C:\Users\Elyas\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\pushe-1.0.0\android\src\main\java\co\ronash\pushe\flutter\PusheApplication.java:35: error: cannot find symbol
            public void onNotificationClicked(@NonNull final NotificationData notificationData) {
                                               ^
  symbol: class NonNull
C:\Users\Elyas\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\pushe-1.0.0\android\src\main\java\co\ronash\pushe\flutter\PusheApplication.java:42: error: cannot find symbol
            public void onNotificationButtonClicked(@NonNull final NotificationData notificationData,
                                                     ^
  symbol: class NonNull
C:\Users\Elyas\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\pushe-1.0.0\android\src\main\java\co\ronash\pushe\flutter\PusheApplication.java:43: error: cannot find symbol
                                                    @NonNull final NotificationButtonData notificationButtonData) {
                                                     ^
  symbol: class NonNull
C:\Users\Elyas\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\pushe-1.0.0\android\src\main\java\co\ronash\pushe\flutter\PusheApplication.java:51: error: cannot find symbol
            public void onCustomContentReceived(@NonNull final JSONObject jsonObject) {
                                                 ^
  symbol: class NonNull
C:\Users\Elyas\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\pushe-1.0.0\android\src\main\java\co\ronash\pushe\flutter\PusheApplication.java:58: error: cannot find symbol
            public void onNotificationDismissed(@NonNull final NotificationData notificationData) {
                                                 ^
  symbol: class NonNull
8 errors

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':pushe: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 16s
Finished with error: Gradle task assembleDebug failed with exit code 1

Answer 1

根据 Pushe's Github repo，此问题已于 version 1.0.1.

修复

https://github.com/pusheco/pushe-flutter/releases

Version 1.0.0 或更低版本与 AndroidX 工件不完全兼容，因为 Flutter 不接触插件的代码，也不迁移它们。

添加 Pushe 插件时找不到符号@NonNull

Cannot find symbol @NonNull when adding Pushe plugin

flutter

pushe

flutter-dependencies