firebasemessaging:没有发现启动应用程序的活动

Question

当我的应用在后台但不工作时，我试图从firebase接收一条消息。我已经看到了一些诸如我的堆叠式问题，但没有工作。谁能帮我找到问题？

当我的应用在后台但不起作用时，我需要这样做。

在这里andoridmanifest.xml

<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-feature android:name="android.hardware.type.watch" />
<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@android:style/Theme.DeviceDefault"
    tools:targetApi="ice_cream_sandwich">

    <service
        android:name=".MyfirebaseMessagingService" android:exported="false" >
        <intent-filter>
            <action android:name="com.google.firebase.MESSAGING_EVENT"/>
        </intent-filter>
    </service>
    <service
        android:name=".MyFirebaseInstanceIDService" android:exported="false">
        <intent-filter>
            <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
        </intent-filter>
    </service>
    <uses-library
        android:name="com.google.android.wearable"
        android:required="true" />
    <!--
           Set to true if your app is Standalone, that is, it does not require the handheld
           app to run.
    -->
    <meta-data
        android:name="com.google.android.wearable.standalone"
        android:value="true" />
    <!-- [START fcm_default_channel] -->
    <!-- [START fcm_default_channel] -->
    <meta-data
        android:name="com.google.firebase.messaging.default_notification_channel_id"
        android:value="@string/default_notification_channel_id" />

    <activity
        android:name=".MainActivity"
        android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
            <!--<action android:name="android.intent.action.VIEW" />-->
            <category android:name="android.intent.category.DEFAULT" />
            <category android:name="android.intent.category.BROWSABLE" />
            <data
                android:host="gizmos"
                android:scheme="example" />
        </intent-filter>
    </activity>

</application>

myfirebasemessagingservice.java：

   public class MyfirebaseMessagingService extends        FirebaseMessagingService {
       public static String TAG = "MyFirebaseMsgService";
       private LocalBroadcastManager broadcaster;

@Override
public void onCreate() {
    super.onCreate();
    createNotificationChannel();
    broadcaster = LocalBroadcastManager.getInstance(this);
}
@Override
public void onDestroy() {
    super.onDestroy();
}
private void createNotificationChannel() {
    // Create the NotificationChannel, but only on API 26+ because
    // the NotificationChannel class is new and not in the support library
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        String channelId = getString(R.string.default_notification_channel_id);
        CharSequence name = getString(R.string.default_notification_channel_id);
        String description = getString(R.string.channel_description);
        int importance = NotificationManager.IMPORTANCE_DEFAULT;
        NotificationChannel channel = new NotificationChannel(channelId, name, importance);
        channel.setDescription(description);
        // Register the channel with the system; you can't change the importance
        // or other notification behaviors after this
        NotificationManager notificationManager = getSystemService(NotificationManager.class);
        notificationManager.createNotificationChannel(channel);
    }
}

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {

    Log.d(TAG, "From: " + remoteMessage.getFrom());
    Intent home = new Intent(getApplicationContext(), MainActivity.class);
    home.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_CLEAR_TASK);
    startActivity(home);
    // Check if message contains a data payload.
    if (remoteMessage.getData().size() > 0) {
        Log.d(TAG, "Message data payload: " + remoteMessage.getData());
    }
    // Check if message contains a notification payload.
    if (remoteMessage.getNotification() != null) {
        Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody());
        Intent intent = new Intent("Data");
        intent.putExtra("messageFromCloud", remoteMessage.getNotification().getBody());
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        broadcaster.sendBroadcast(intent);
        if (intent.getExtras() != null)
        {
            RemoteMessage.Builder builder = new RemoteMessage.Builder("MyFirebaseMessagingService");
            for (String key : intent.getExtras().keySet())
            {
                builder.addData(key, intent.getExtras().get(key).toString());
            }
            onMessageReceived(builder.build());
        }
    }

}
   }

Answer 1

如果要使用MainActivity作为Notification click活动的Activity，则需要代码：

<activity
    android:name=".MainActivity"
    android:label="@string/app_name">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
        <category android:name="android.intent.category.BROWSABLE" />
        <data
            android:host="gizmos"
            android:scheme="example" />
    </intent-filter>
</activity>

它将自动重定向到Notification click上的MainAcitivity。

Answer 2

您需要在清单中提及消息传递文件，但这不仅是通过通知打开活动的解决方案，还需要在消息传递文件中写入意图。

  intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
  intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

为清单编写此代码：

<meta-data
        android:name="com.google.firebase.messaging.default_notification_color"
        android:resource="@color/colorAccent" />

<service
            android:name=".MyFirebaseMessagingService"
            android:permission=""
            tools:ignore="ExportedService">
            <intent-filter>
                <action android:name="com.google.firebase.MESSAGING_EVENT" />
            </intent-filter>
        </service>

您需要将其声明为服务，因为通知是服务的一部分，并且在您关闭申请时在应用程序背景中运行。