Fcm 集成出现异常

素材狗 2022-01-01 09:20:50 文章分类：移动开发问题点击数：1次

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Fcm integration getting the exception(Fcm 集成出现异常)

本文介绍了Fcm 集成出现异常的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在处理 FCM 集成，但得到 java.lang.ClassNotFoundException:在路径上找不到类service.MyFirebaseMessagingService":DexPathList[[zip file/data/app/com.rk.servicepractise-2/base.apk"],nativeLibraryDirectories=[/vendor/lib64,/system/lib64]]

I am working on the FCM integration but getting the java.lang.ClassNotFoundException: Didn't find class "service.MyFirebaseMessagingService" on path: DexPathList[[zip file "/data/app/com.rk.servicepractise-2/base.apk"],nativeLibraryDirectories=[/vendor/lib64, /system/lib64]]

我已经搜索了它，但还没有找到正确的解决方案，请检查我下面的代码，让我知道我在哪里做错了吗?

I have searched it about but did not get the proper solution yet,Please check my code below and let me know where am i doing wrong?

请用 gradle 检查我的 classes 和 manifest 文件，请帮我解决这个问题.
我的第一个类是 MyFirebaseInstanceIDService，它扩展了 FirebaseInstanceIdService 类

Please check my classes and manifest file with gradle, Please help me to short out from this problem.
My first class that is the MyFirebaseInstanceIDService which extends FirebaseInstanceIdService class

public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {

    private static final String TAG = "MyFirebaseIIDService";

    @Override
    public void onTokenRefresh() {

        //Getting registration token
        String refreshedToken = FirebaseInstanceId.getInstance().getToken();

        //Displaying token on logcat
        Log.d(TAG, "Refreshed token: " + refreshedToken);

    }

    private void sendRegistrationToServer(String token) {
        //You can implement this method to store the token on your server
        //Not required for current project
    }
}

还有一个扩展 FirebaseMessagingService 类的 Fcm 类，如下所示:-

And one more class for the Fcm that extends FirebaseMessagingService class which are as follow:-

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    private static final String TAG = "MyFirebaseMsgService";

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        //Displaying data in log
        //It is optional
        Log.d(TAG, "From: " + remoteMessage.getFrom());
        Log.d(TAG, "Notification Message Body: " + remoteMessage.getNotification().getBody());

        //Calling method to generate notification
        sendNotification(remoteMessage.getNotification().getBody());
    }

    //This method is only generating push notification
    //It is same as we did in earlier posts
    private void sendNotification(String messageBody) {
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
                PendingIntent.FLAG_ONE_SHOT);

        Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle("Firebase Push Notification")
                .setContentText(messageBody)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent);

        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        notificationManager.notify(0, notificationBuilder.build());
    }
}

下面是此 Fcm

<application>
.
.
.
.

  <service
        android:name="com.rk.servicepractise.service.MyFirebaseMessagingService">
        <intent-filter>
            <action android:name="com.google.firebase.MESSAGING_EVENT"/>
        </intent-filter>
    </service>

    <service
        android:name="com.rk.servicepractise.service.MyFirebaseInstanceIDService">
        <intent-filter>
            <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
        </intent-filter>
    </service>

    </application>

我使用的 gradle 如下 Module:app:-

And the gradle which i am using for it as follow Module:app:-

apply plugin: 'com.android.application'

android {
.
.
.
.
.

}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile 'com.android.support:design:23.1.1'
    compile 'com.google.firebase:firebase-messaging:9.8.0'

}
apply plugin: 'com.google.gms.google-services'

build.gradle 与 Project:ProjectName

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.5.0'
        classpath 'com.google.gms:google-services:3.0.0'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

以下是我得到的 Exception:-

                                                           java.lang.RuntimeException: Unable to instantiate service service.MyFirebaseInstanceIDService: java.lang.ClassNotFoundException: Didn't find class "service.MyFirebaseInstanceIDService" on path: DexPathList[[zip file "/data/app/com.rk.servicepractise-1/base.apk"],nativeLibraryDirectories=[/vendor/lib64, /system/lib64]]
                                                                    at android.app.ActivityThread.handleCreateService(ActivityThread.java:2779)
                                                                    at android.app.ActivityThread.access$1900(ActivityThread.java:154)
                                                                    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1404)
                                                                    at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                    at android.os.Looper.loop(Looper.java:135)
                                                                    at android.app.ActivityThread.main(ActivityThread.java:5292)
                                                                    at java.lang.reflect.Method.invoke(Native Method)
                                                                    at java.lang.reflect.Method.invoke(Method.java:372)
                                                                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
                                                                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
                                                                 Caused by: java.lang.ClassNotFoundException: Didn't find class "service.MyFirebaseInstanceIDService" on path: DexPathList[[zip file "/data/app/com.rk.servicepractise-1/base.apk"],nativeLibraryDirectories=[/vendor/lib64, /system/lib64]]
                                                                    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
                                                                    at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
                                                                    at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
                                                                    at android.app.ActivityThread.handleCreateService(ActivityThread.java:2776)
                                                                    at android.app.ActivityThread.access$1900(ActivityThread.java:154) 
                                                                    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1404) 
                                                                    at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                    at android.os.Looper.loop(Looper.java:135) 
                                                                    at android.app.ActivityThread.main(ActivityThread.java:5292) 
                                                                    at java.lang.reflect.Method.invoke(Native Method) 
                                                                    at java.lang.reflect.Method.invoke(Method.java:372) 
                                                                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904) 
                                                                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699) 
                                                                    Suppressed: java.lang.ClassNotFoundException: service.MyFirebaseInstanceIDService
                                                                    at java.lang.Class.classForName(Native Method)
                                                                    at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
                                                                    at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
                                                                    at java.lang.ClassLoader.loadClass(ClassLoader.java:504)