無法接收來自FCM的通知

Question

我試圖構建一個簡單的應用程序，可以從FCM（Firebase雲消息傳遞系統）接收通知。我可以生成令牌並將其顯示在文本視圖中。另外，我已經編寫了在Log中使用log.d（）從「FirebaseMessagingService」擴展到「FirebaseMessegingService」類中打印通知消息的邏輯。但是，一旦我從FCM控制檯發送消息，應用程序就會崩潰，並在Android監視器上收到以下錯誤消息。

的Android監視器

06-26 18:09:02.447 3798-3798/com.example.sumeet.firebasedemoyout E/AndroidRuntime: FATAL EXCEPTION: main 
                        Process: com.example.sumeet.firebasedemoyout, PID: 3798 
                        java.lang.RuntimeException: Unable to instantiate service com.example.sumeet.firebasedemoyout.MyFirebaseMessagingService: java.lang.ClassNotFoundException: Didn't find class "com.example.sumeet.firebasedemoyout.MyFirebaseMessagingService" on path: DexPathList[[zip file "/data/app/com.example.sumeet.firebasedemoyout-1/base.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_dependencies_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_0_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_1_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_2_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_3_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_4_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_5_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_6_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_7_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_8_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/com.example.sumeet.firebasedemoyout-1/lib/x86_64, /system/lib64, /vendor/lib64]] 
                         at android.app.ActivityThread.handleCreateService(ActivityThread.java:3176) 
                         at android.app.ActivityThread.-wrap5(ActivityThread.java) 
                         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1567) 
                         at android.os.Handler.dispatchMessage(Handler.java:102) 
                         at android.os.Looper.loop(Looper.java:154) 
                         at android.app.ActivityThread.main(ActivityThread.java:6119) 
                         at java.lang.reflect.Method.invoke(Native Method) 
                         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
                         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 
                        Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.sumeet.firebasedemoyout.MyFirebaseMessagingService" on path: DexPathList[[zip file "/data/app/com.example.sumeet.firebasedemoyout-1/base.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_dependencies_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_0_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_1_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_2_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_3_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_4_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_5_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_6_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_7_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_8_apk.apk", zip file "/data/app/com.example.sumeet.firebasedemoyout-1/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/com.example.sumeet.firebasedemoyout-1/lib/x86_64, /system/lib64, /vendor/lib64]] 
                         at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) 
                         at java.lang.ClassLoader.loadClass(ClassLoader.java:380) 
                         at java.lang.ClassLoader.loadClass(ClassLoader.java:312) 
                         at android.app.ActivityThread.handleCreateService(ActivityThread.java:3173) 
                         at android.app.ActivityThread.-wrap5(ActivityThread.java)  
                         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1567)  
                         at android.os.Handler.dispatchMessage(Handler.java:102)  
                         at android.os.Looper.loop(Looper.java:154)  
                         at android.app.ActivityThread.main(ActivityThread.java:6119)  
                         at java.lang.reflect.Method.invoke(Native Method)  
                         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)  
                         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)  


                        --------- beginning of system 

可以請你糾正我的邏輯我在哪裏去了？發佈在相關代碼下方。

MainActivity.java

package com.example.sumeet.firebasedemoyout; 

import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.content.IntentFilter; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.util.Log; 
import android.widget.TextView; 
import android.widget.Toast; 

public class MainActivity extends AppCompatActivity { 
    TextView textView; 
    private BroadcastReceiver broadcastReceiver; 

    //Token fu_TOJsifrA:APA91bEGAnpWMp5HBaWVSrwYXvyiqSf1EcgMCH4D_SFEheYUJ0hA46qOF_FoKjy7tkMfMzoacOlR6sKqHpNritx-jRb--VZK_Nn7rhYO6ZQlmGpgMP3OoQIRyFjGl81XlesHM2y__k1Q 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     textView = (TextView) findViewById(R.id.token_tv); 

     broadcastReceiver = new BroadcastReceiver() { 
      @Override 
      public void onReceive(Context context, Intent intent) { 
       Toast.makeText(getApplicationContext(), "SHOWME", Toast.LENGTH_SHORT).show(); 
       textView.setText(SharedPrefManager.getInstanceID(MainActivity.this).getToken()); 
      } 
     }; 

     if (SharedPrefManager.getInstanceID(this).getToken() != null) { 
      textView.setText(SharedPrefManager.getInstanceID(MainActivity.this).getToken()); 
      Log.d("MYSHAREDPREFTOKEN", SharedPrefManager.getInstanceID(this).getToken()); 
     } 


     registerReceiver(broadcastReceiver, new IntentFilter(FireBaseTokenService.Token_broadcast)); 
    } 
} 

FirebaseMessegingService.java

package com.example.sumeet.firebasedemoyout; 

import android.util.Log; 

import com.google.firebase.messaging.FirebaseMessagingService; 
import com.google.firebase.messaging.RemoteMessage; 

/** 
* Created by Sumeet on 25-06-2017. 
*/ 

public class FirebaseMessegingService extends FirebaseMessagingService { 
    private static final String TAG = "MyTAG"; 

    @Override 
    public void onMessageReceived(RemoteMessage remoteMessage) { 

     Log.d(TAG, "From: " + remoteMessage.getFrom()); 
     Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody()); 

    } 
} 

SharedPrefManager.java

package com.example.sumeet.firebasedemoyout; 

import android.content.Context; 
import android.content.SharedPreferences; 

/** 
* Created by Sumeet on 25-06-2017. 
*/ 

public class SharedPrefManager { 
    private static Context mContext; 
    private static SharedPrefManager mInstance; 
    private static final String SharedPref_name = "FCMSharedPref"; 
    private static final String SharedPref_keyAccessToken = "FCMSharedPref_Key"; 


    public SharedPrefManager(Context context) { 
     mContext = context; 
    } 

    public static synchronized SharedPrefManager getInstanceID(Context context) { 
     if (mInstance == null) { 
      mInstance = new SharedPrefManager(context); 
     } 
     return mInstance; 

    } 

    public boolean storeToken(String token) { 
     SharedPreferences sharedPreferences = mContext.getSharedPreferences(SharedPref_name, Context.MODE_PRIVATE); 
     SharedPreferences.Editor editor = sharedPreferences.edit(); 
     editor.putString(SharedPref_keyAccessToken, token); 
     editor.apply(); 
     return true; 

    } 

    public String getToken() { 
     SharedPreferences sharedPreferences = mContext.getSharedPreferences(SharedPref_name, Context.MODE_PRIVATE); 
     return sharedPreferences.getString(SharedPref_keyAccessToken, null); 

    } 
} 

FireBaseTokenService.java

package com.example.sumeet.firebasedemoyout; 

import android.content.Intent; 
import android.util.Log; 

import com.google.firebase.iid.FirebaseInstanceId; 
import com.google.firebase.iid.FirebaseInstanceIdService; 

import static com.google.android.gms.internal.zzs.TAG; 

/** 
* Created by Sumeet on 25-06-2017. 
*/ 

public class FireBaseTokenService extends FirebaseInstanceIdService { 

    public static final String Token_broadcast = "FCMToken_Broadcast"; 

    @Override 
    public void onTokenRefresh() { 
     // Get updated InstanceID token. 
     String refreshedToken = FirebaseInstanceId.getInstance().getToken(); 
     Log.d(TAG, "Refreshed token: " + refreshedToken); 


     getApplicationContext().sendBroadcast(new Intent(Token_broadcast)); 
     storeToken(refreshedToken); 
    } 

    private void storeToken(String refreshedToken) { 

     SharedPrefManager.getInstanceID(getApplicationContext()).storeToken(refreshedToken); 
    } 

} 

Android清單

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.example.sumeet.firebasedemoyout"> 

    <application 
     android:allowBackup="true" 
     android:icon="@mipmap/ic_launcher" 
     android:label="@string/app_name" 
     android:roundIcon="@mipmap/ic_launcher_round" 
     android:supportsRtl="true" 
     android:theme="@style/AppTheme"> 
     <activity android:name=".MainActivity"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 

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

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

</manifest> 

的build.gradle（模塊：APP）

apply plugin: 'com.android.application' 

android { 
    compileSdkVersion 25 
    buildToolsVersion "25.0.2" 
    defaultConfig { 
     applicationId "com.example.sumeet.firebasedemoyout" 
     minSdkVersion 21 
     targetSdkVersion 25 
     versionCode 1 
     versionName "1.0" 
     testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 
    } 
    buildTypes { 
     release { 
      minifyEnabled false 
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
     } 
    } 
} 

dependencies { 
    compile fileTree(dir: 'libs', include: ['*.jar']) 
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { 
     exclude group: 'com.android.support', module: 'support-annotations' 
    }) 
    compile 'com.android.support:appcompat-v7:25.3.1' 
    compile 'com.android.support.constraint:constraint-layout:1.0.2' 
    compile 'com.google.firebase:firebase-messaging:10.0.1' 
    testCompile 'junit:junit:4.12' 
} 


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

Answer 1

看來你聲明名爲MyFirebaseMessagingService從清單 服務。但是，您提供的課程名稱爲FirebaseMessegingService.java

也許在您的清單中匹配正確的類名可以保護您免遭崩潰。

乾杯