Question

我想在我的flutter应用程序上使用fcm，因此在创建了Firebase控制台并在我的gradle中安装了一些依赖项后，像这样：

build.gradle：项目

dependencies {
    classpath 'com.android.tools.build:gradle:3.5.0'
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    classpath 'com.google.gms:google-services:4.3.3'
}

build.gradle：应用

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
apply plugin: 'com.google.gms.google-services'
...
dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.google.firebase:firebase-analytics:17.5.0'
    implementation 'com.google.firebase:firebase-messaging:20.2.4'
}

并创建一个Java应用程序类：

import io.flutter.app.FlutterApplication;
import io.flutter.plugin.common.PluginRegistry;
import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback;
import io.flutter.plugins.GeneratedPluginRegistrant;
import io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin;
import io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService;

public class Application extends FlutterApplication implements PluginRegistrantCallback {
    @Override
    public void onCreate() {
        super.onCreate();
        FlutterFirebaseMessagingService.setPluginRegistrant(this);
    }

    @Override
    public void registerWith(PluginRegistry registry) {
        FirebaseMessagingPlugin.registerWith(registry.registrarFor("io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin"));
    }
}

并在清单中添加此应用类和intent-filter：

<application
    android:name=".Application"
    android:label="sian_mobile"
    android:icon="@mipmap/ic_launcher">
    <activity
        android:name=".MainActivity"
    ...
                <intent-filter>
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
        <intent-filter>
            <action android:name="FLUTTER_NOTIFICATION_CLICK" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>

并在pubspect中安装firebase_messaging: ^7.0.0

我编写了以下简单的FirebaseMessaging代码：

  FirebaseMessaging _firebaseMessaging = FirebaseMessaging();
  @override
  void initState() {
    super.initState();

    _firebaseMessaging.configure(
      onMessage: (message) async {
        print("-------> $message");
      },
      onResume: (message) async {
        print("-------> $message");
      },
      onLaunch: (message) async {},
    );
  }

当我运行应用程序且应用程序处于前台时，我将通知从控制台推送到应用程序。在vscode控制台中，我收到此错误：

Installing build/app/outputs/flutter-apk/app.apk...
E/FlutterFcmService(11005): Fatal: failed to find callback
Connecting to VM Service at ws://127.0.0.1:41113/PSCQfaDH4oA=/ws
D/EGL_emulation(11005): eglMakeCurrent: 0xe83ba420: ver 2 0 (tinfo 0xc80dd6e0)
W/.sian_mobil(11005): Accessing hidden method Landroid/os/WorkSource;->add(I)Z (greylist, reflection, allowed)
W/.sian_mobil(11005): Accessing hidden method Landroid/os/WorkSource;->add(ILjava/lang/String;)Z (greylist, reflection, allowed)
W/.sian_mobil(11005): Accessing hidden method Landroid/os/WorkSource;->size()I (greylist, reflection, allowed)
W/.sian_mobil(11005): Accessing hidden method Landroid/os/WorkSource;->get(I)I (greylist, reflection, allowed)
W/.ian_mobil(11005): Accessing hidden method Landroid/os/WorkSource;->getName(I)Ljava/lang/String; (greylist, reflection, allowed)
I/flutter (11005): -------> {notification: {title: test title, body: Test notification text}, data: {}}

Answer 1

当应用程序在前台时，看起来仍然收到推送消息。该问题可能是由于应用程序在后台时没有推送消息的处理程序造成的。我建议通过此 guide 设置后台消息处理程序。

颤振：FlutterFcmService-致命：找不到回调

1 个答案: