无法创建服务io.flutter.plugins. firebasemessagingservice . flutter

Question

我已经将我的flutter应用程序与firebase消息传递集成，并成功收到通知，所有工作正常，但现在当我试图再次运行该项目时，它显示了错误，当我向设备发送通知时，它停止了。

误差

D/AndroidRuntime( 8359): Shutting down VM
E/AndroidRuntime( 8359): FATAL EXCEPTION: main
E/AndroidRuntime( 8359): Process: com.tapfy.me, PID: 8359
E/AndroidRuntime( 8359): java.lang.RuntimeException: Unable to create service io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService: java.lang.RuntimeException: PluginRegistrantCallback is not set.
E/AndroidRuntime( 8359):    at android.app.ActivityThread.handleCreateService(ActivityThread.java:4204)
E/AndroidRuntime( 8359):    at android.app.ActivityThread.access$1500(ActivityThread.java:237)
E/AndroidRuntime( 8359):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1932)
E/AndroidRuntime( 8359):    at android.os.Handler.dispatchMessage(Handler.java:106)
E/AndroidRuntime( 8359):    at android.os.Looper.loop(Looper.java:223)
E/AndroidRuntime( 8359):    at android.app.ActivityThread.main(ActivityThread.java:7656)
E/AndroidRuntime( 8359):    at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime( 8359):    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
E/AndroidRuntime( 8359):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
E/AndroidRuntime( 8359): Caused by: java.lang.RuntimeException: PluginRegistrantCallback is not set.
E/AndroidRuntime( 8359):    at io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService.startBackgroundIsolate(FlutterFirebaseMessagingService.java:157)
E/AndroidRuntime( 8359):    at io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService.onCreate(FlutterFirebaseMessagingService.java:77)
E/AndroidRuntime( 8359):    at android.app.ActivityThread.handleCreateService(ActivityThread.java:4192)
E/AndroidRuntime( 8359):    ... 8 more
I/Process ( 8359): Sending signal. PID: 8359 SIG: 9

Answer 1

创建新的应用程序类

class Application : FlutterApplication(), PluginRegistrantCallback {
override fun onCreate() {
super.onCreate()
FlutterFirebaseMessagingService.setPluginRegistrant(this)
}
override fun registerWith(registry: PluginRegistry?) {
io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin.registerWith(registry?.registrarFor("io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin"));
}

}

改变你的Manifest

<application
android:name=".Application"

Answer 2

如果您正在使用Flutter Android embedded V2 (Flutter Version>= 1.12)，则不需要额外的集成步骤。但是对于V1，你需要编辑。

应用程序类:

// ...
import io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingBackgroundService;
public class Application extends FlutterApplication implements 
PluginRegistrantCallback {
// ...
@Override
public void onCreate() {
super.onCreate();

FlutterFirebaseMessagingBackgroundService
.setPluginRegistrant(this);
}
@Override
public void registerWith(PluginRegistry registry) {
GeneratedPluginRegistrant.registerWith(registry);
}
// ...
}

Android Manifest.xml:

<application
android:name=".Application"
...

官方文档链接。