Firebase（Android）：Transaction.success（mutableData）導致應用程序崩潰

我試圖編寫一個函數來使用Firebase中的事務在chatapp（android）中增加未讀消息數。Firebase（Android）：Transaction.success（mutableData）導致應用程序崩潰

我的數據庫結構如下：

成員列表可實際上包含多於2級的用戶羣聊我打算以後擴大。

目前，消息可以添加給messageManager但加入到給messageManager後，我想增加unreadCount以外的發件人的所有其他用戶也是如此。我意識到我需要使用Transaction來使它成爲原子，所以這是我的incrementUnreadCount代碼。

private static void incrementUnreadCount(String chatRoomId) { 

    DatabaseReference mDatabaseMemberList = mDatabaseChatRooms.child(chatRoomId).child("memberList"); 

    mDatabaseMemberList.runTransaction(new Transaction.Handler() { 
     @Override 
     public Transaction.Result doTransaction(MutableData mutableData) { 

      Map<String, Map<String, Object>> tempMemberList = (Map<String, Map<String, Object>>) mutableData.getValue(); 

      if (tempMemberList == null) { 
       return Transaction.abort(); 
      } 

      for (String key : tempMemberList.keySet()) { 
       // if it is not a sender node 
       if (!key.equals(TutUserManager.getCurrentUid())) { 
        Map<String, Object> tempMap = tempMemberList.get(key); 
        long tempCount = (long) tempMap.get("unreadCount"); 
        tempCount += 1; 
        tempMap.put("unreadCount", tempCount); 
        tempMemberList.put(key, tempMap); 
       } 
      } 

      mutableData.setValue(tempMemberList); 
      return Transaction.success(mutableData); 
     } 

     @Override 
     public void onComplete(DatabaseError databaseError, boolean b, DataSnapshot dataSnapshot) { 

     } 
    }); 
}

以下代碼僅在發送第二條消息時有效。所以unreadCount的值比它預期的要少1。

我讀的doc和意識到，對於空情況下，它應該是：

return Transaction.success(mutableData);

，而不是：

return Transaction.abort();

爲中止（）將使服務器中止而不是交易試圖再次進行交易。

我嘗試更改上面的代碼以使用return ransaction.success(mutableData);，但它會導致應用程序在調用該函數時崩潰。

我錯過了什麼嗎？

這是我從控制檯得到：

11/14 23:19:25: Launching app 
No apk changes detected since last installation, skipping installation of C:\Users\Potcharaphol\AndroidStudioProjects\Tut\app\build\outputs\apk\app-debug.apk 
$ adb shell am force-stop com.pchatanan.tut 
$ adb shell am start -n "com.pchatanan.tut/com.pchatanan.tut.MainActivities.GetStartedActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER -D 
Waiting for application to come online: com.pchatanan.tut.test | com.pchatanan.tut 
Connecting to com.pchatanan.tut 
E/HAL: load: id=gralloc != hmi->id=gralloc 
I/System.out: Sending WAIT chunk 
I/art: Debugger is active 
I/System.out: Debugger has connected 
I/System.out: waiting for debugger to settle... 
Connected to the target VM, address: 'localhost:8600', transport: 'socket' 
I/System.out: waiting for debugger to settle... 
I/System.out: waiting for debugger to settle... 
I/System.out: waiting for debugger to settle... 
I/System.out: waiting for debugger to settle... 
I/System.out: waiting for debugger to settle... 
I/System.out: waiting for debugger to settle... 
I/System.out: debugger has settled (1339) 
I/InstantRun: Instant Run Runtime started. Android package is com.pchatanan.tut, real application class is null. 

       [ 11-14 23:19:29.241 2931: 2931 E/   ] 
       process stopped due to unexpected signal 13 
W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found. 
W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found. 

        [ 11-14 23:19:29.819 2931: 2931 E/   ] 
        process stopped due to unexpected signal 13 
I/FA: App measurement is starting up, version: 9877 
I/FA: To enable debug logging run: adb shell setprop log.tag.FA VERBOSE 
I/FA: To enable faster debug mode event logging run: 
     adb shell setprop firebase.analytics.debug-mode com.pchatanan.tut 
I/HwCust: Constructor found for class android.app.HwCustAlarmManagerImpl 
I/FirebaseInitProvider: FirebaseApp initialization successful 
I/HwCust: Constructor found for class android.app.HwCustHwWallpaperManagerImpl 
W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable 

     [ 11-14 23:19:30.422 2931: 2931 E/   ] 
     process stopped due to unexpected signal 13 
I/AppCompatViewInflater: app:theme is now deprecated. Please move to using android:theme instead. 
I/HwSecImmHelper: mSecurityInputMethodService is null 
W/ActionBarDrawerToggle: DrawerToggle may not show up because NavigationIcon is not visible. You may need to call actionbar.setDisplayHomeAsUpEnabled(true); 
I/DynamiteModule: Considering local module com.google.android.gms.firebase_database:4 and remote module com.google.android.gms.firebase_database:4 
I/DynamiteModule: Selected remote version of com.google.android.gms.firebase_database, version >= 4 
W/System: ClassLoader referenced unknown path: /data/user/0/com.google.android.gms/app_chimera/m/00000018/n/arm64-v8a 

      [ 11-14 23:19:31.068 2931: 2931 E/   ] 
      process stopped due to unexpected signal 13 
E/HAL: load: id=gralloc != hmi->id=gralloc 
I/OpenGLRenderer: Initialized EGL, version 1.4 
I/System: core_booster, getBoosterConfig = false 
I/System: core_booster, getBoosterConfig = false 

      [ 11-14 23:19:33.493 2931: 2931 E/   ] 
      process stopped due to unexpected signal 13 
W/Settings: Setting airplane_mode_on has moved from android.provider.Settings.System to android.provider.Settings.Global, returning read-only value. 
I/System: core_booster, getBoosterConfig = false 
I/System: core_booster, getBoosterConfig = false 

      [ 11-14 23:19:35.396 2931: 2931 E/   ] 
      process stopped due to unexpected signal 13 
I/HwSecImmHelper: mSecurityInputMethodService is null 
I/HwSecImmHelper: mSecurityInputMethodService is null 
I/HwSecImmHelper: mSecurityInputMethodService is null 
W/art: Suspending all threads took: 14.466ms 
I/FA: Tag Manager is not found and thus will not be used 
I/AppCompatViewInflater: app:theme is now deprecated. Please move to using android:theme instead. 
I/HwSecImmHelper: mSecurityInputMethodService is null 
I/HwSecImmHelper: mSecurityInputMethodService is null 
I/System: core_booster, getBoosterConfig = false 
I/System: core_booster, getBoosterConfig = false 
I/HwSecImmHelper: mSecurityInputMethodService is null 
I/AppCompatViewInflater: app:theme is now deprecated. Please move to using android:theme instead. 
E/RecyclerView: No adapter attached; skipping layout 
I/HwSecImmHelper: mSecurityInputMethodService is null 
I/HwSecImmHelper: mSecurityInputMethodService is null 
E/RecyclerView: No adapter attached; skipping layout 
I/HwSecImmHelper: mSecurityInputMethodService is null 
I/HwSecImmHelper: mSecurityInputMethodService is null 
I/HwSecImmHelper: mSecurityInputMethodService is null 
I/HwSecImmHelper: mSecurityInputMethodService is null 
W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found. 
I/Process: Sending signal. PID: 20588 SIG: 9 
Disconnected from the target VM, address: 'localhost:8600', transport: 'socket'

這是我從logcat中得到的，似乎有沒有錯誤。

               [ 11-14 23:21:49.129 2931: 2931 E/   ] 
                   process stopped due to unexpected signal 13 
11-14 23:21:49.321 21571-21571/com.pchatanan.tut I/System.out: waiting for debugger to settle... 
11-14 23:21:49.522 21571-21571/com.pchatanan.tut I/System.out: waiting for debugger to settle... 
11-14 23:21:49.723 21571-21571/com.pchatanan.tut I/System.out: waiting for debugger to settle... 

                   [ 11-14 23:21:49.781 2931: 2931 E/   ] 
                   process stopped due to unexpected signal 13 
11-14 23:21:49.924 21571-21571/com.pchatanan.tut I/System.out: waiting for debugger to settle... 
11-14 23:21:50.125 21571-21571/com.pchatanan.tut I/System.out: debugger has settled (1319) 
11-14 23:21:50.149 21571-21571/com.pchatanan.tut I/InstantRun: Instant Run Runtime started. Android package is com.pchatanan.tut, real application class is null. 

                   [ 11-14 23:21:50.364 2931: 2931 E/   ] 
                   process stopped due to unexpected signal 13 
11-14 23:21:50.842 21571-21633/com.pchatanan.tut W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found. 
11-14 23:21:50.863 21571-21633/com.pchatanan.tut W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found. 
11-14 23:21:50.973 21571-21571/com.pchatanan.tut I/FA: App measurement is starting up, version: 9877 
11-14 23:21:50.973 21571-21571/com.pchatanan.tut I/FA: To enable debug logging run: adb shell setprop log.tag.FA VERBOSE 
11-14 23:21:50.980 21571-21571/com.pchatanan.tut I/FA: To enable faster debug mode event logging run: 
                 adb shell setprop firebase.analytics.debug-mode com.pchatanan.tut 

                 [ 11-14 23:21:50.999 2931: 2931 E/   ] 
                 process stopped due to unexpected signal 13 
11-14 23:21:51.035 21571-21571/com.pchatanan.tut I/HwCust: Constructor found for class android.app.HwCustAlarmManagerImpl 
11-14 23:21:51.043 21571-21571/com.pchatanan.tut I/FirebaseInitProvider: FirebaseApp initialization successful 
11-14 23:21:51.140 21571-21571/com.pchatanan.tut I/HwCust: Constructor found for class android.app.HwCustHwWallpaperManagerImpl 
11-14 23:21:51.216 21571-21571/com.pchatanan.tut W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable 
11-14 23:21:51.601 21571-21571/com.pchatanan.tut I/AppCompatViewInflater: app:theme is now deprecated. Please move to using android:theme instead. 

                      [ 11-14 23:21:51.609 2931: 2931 E/   ] 
                      process stopped due to unexpected signal 13 
11-14 23:21:51.875 21571-21571/com.pchatanan.tut I/HwSecImmHelper: mSecurityInputMethodService is null 
11-14 23:21:51.925 21571-21571/com.pchatanan.tut W/ActionBarDrawerToggle: DrawerToggle may not show up because NavigationIcon is not visible. You may need to call actionbar.setDisplayHomeAsUpEnabled(true); 
11-14 23:21:52.015 21571-21571/com.pchatanan.tut I/DynamiteModule: Considering local module com.google.android.gms.firebase_database:4 and remote module com.google.android.gms.firebase_database:4 
11-14 23:21:52.015 21571-21571/com.pchatanan.tut I/DynamiteModule: Selected remote version of com.google.android.gms.firebase_database, version >= 4 
11-14 23:21:52.030 21571-21571/com.pchatanan.tut W/System: ClassLoader referenced unknown path: /data/user/0/com.google.android.gms/app_chimera/m/00000018/n/arm64-v8a 
11-14 23:21:52.192 21571-21651/com.pchatanan.tut E/HAL: load: id=gralloc != hmi->id=gralloc 
11-14 23:21:52.193 21571-21651/com.pchatanan.tut I/OpenGLRenderer: Initialized EGL, version 1.4 
11-14 23:21:52.194 21571-21666/com.pchatanan.tut I/System: core_booster, getBoosterConfig = false 

                  [ 11-14 23:21:52.196 2931: 2931 E/   ] 
                  process stopped due to unexpected signal 13 
11-14 23:21:54.257 21571-21711/com.pchatanan.tut I/System: core_booster, getBoosterConfig = false 

                  [ 11-14 23:21:54.586 2931: 2931 E/   ] 
                  process stopped due to unexpected signal 13 


                  [ 11-14 23:21:55.208 2931: 2931 E/   ] 
                  process stopped due to unexpected signal 13 
11-14 23:21:56.193 21571-21571/com.pchatanan.tut W/Settings: Setting airplane_mode_on has moved from android.provider.Settings.System to android.provider.Settings.Global, returning read-only value. 
11-14 23:21:56.248 21571-21743/com.pchatanan.tut I/System: core_booster, getBoosterConfig = false 
11-14 23:21:56.279 21571-21743/com.pchatanan.tut I/System: core_booster, getBoosterConfig = false 

                  [ 11-14 23:21:56.442 2931: 2931 E/   ] 
                  process stopped due to unexpected signal 13 


                  [ 11-14 23:21:57.081 2931: 2931 E/   ] 
                  process stopped due to unexpected signal 13 
11-14 23:21:57.204 21571-21571/com.pchatanan.tut I/HwSecImmHelper: mSecurityInputMethodService is null 
11-14 23:21:57.206 21571-21571/com.pchatanan.tut I/HwSecImmHelper: mSecurityInputMethodService is null 
11-14 23:22:01.561 21571-21633/com.pchatanan.tut W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found. 

                    [ 11-14 23:22:01.587 2931: 2931 E/   ] 
                    process stopped due to unexpected signal 13 


                    [ 11-14 23:22:02.195 2931: 2931 E/   ] 
                    process stopped due to unexpected signal 13 


                    [ 11-14 23:22:02.874 2931: 2931 E/   ] 
                    process stopped due to unexpected signal 13 


                    [ 11-14 23:22:03.487 2931: 2931 E/   ] 
                    process stopped due to unexpected signal 13 
11-14 23:22:07.605 21571-21571/com.pchatanan.tut I/HwSecImmHelper: mSecurityInputMethodService is null 
11-14 23:22:07.720 21571-21641/com.pchatanan.tut I/FA: Tag Manager is not found and thus will not be used 
11-14 23:22:07.775 21571-21571/com.pchatanan.tut I/AppCompatViewInflater: app:theme is now deprecated. Please move to using android:theme instead. 
11-14 23:22:07.985 21571-21571/com.pchatanan.tut I/HwSecImmHelper: mSecurityInputMethodService is null 
11-14 23:22:07.985 21571-21571/com.pchatanan.tut I/HwSecImmHelper: mSecurityInputMethodService is null 
11-14 23:22:09.062 21571-21942/com.pchatanan.tut I/System: core_booster, getBoosterConfig = false 
11-14 23:22:09.141 21571-21942/com.pchatanan.tut I/System: core_booster, getBoosterConfig = false 
11-14 23:22:09.354 21571-21571/com.pchatanan.tut I/AppCompatViewInflater: app:theme is now deprecated. Please move to using android:theme instead. 
11-14 23:22:09.454 21571-21571/com.pchatanan.tut E/RecyclerView: No adapter attached; skipping layout 
11-14 23:22:09.471 21571-21571/com.pchatanan.tut I/HwSecImmHelper: mSecurityInputMethodService is null 
11-14 23:22:09.472 21571-21571/com.pchatanan.tut I/HwSecImmHelper: mSecurityInputMethodService is null 
11-14 23:22:09.476 21571-21571/com.pchatanan.tut E/RecyclerView: No adapter attached; skipping layout 
11-14 23:22:10.246 21571-21571/com.pchatanan.tut I/HwSecImmHelper: mSecurityInputMethodService is null 
11-14 23:22:10.308 21571-21571/com.pchatanan.tut I/HwSecImmHelper: mSecurityInputMethodService is null 
11-14 23:22:10.309 21571-21571/com.pchatanan.tut I/HwSecImmHelper: mSecurityInputMethodService is null 
11-14 23:22:10.313 21571-21571/com.pchatanan.tut I/HwSecImmHelper: mSecurityInputMethodService is null 
11-14 23:22:13.747 21571-21571/com.pchatanan.tut I/Process: Sending signal. PID: 21571 SIG: 9 
11-14 23:22:13.995 22048-22063/com.pchatanan.tut E/HAL: load: id=gralloc != hmi->id=gralloc 
11-14 23:22:14.012 22048-22048/com.pchatanan.tut I/InstantRun: Instant Run Runtime started. Android package is com.pchatanan.tut, real application class is null. 
11-14 23:22:14.575 22048-22083/com.pchatanan.tut W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found. 
11-14 23:22:14.659 22086-22100/com.pchatanan.tut E/HAL: load: id=gralloc != hmi->id=gralloc 
11-14 23:22:14.679 22086-22086/com.pchatanan.tut I/InstantRun: Instant Run Runtime started. Android package is com.pchatanan.tut, real application class is null. 
11-14 23:22:15.323 22086-22133/com.pchatanan.tut W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found. 
11-14 23:22:15.341 22086-22133/com.pchatanan.tut W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found. 
11-14 23:22:15.462 22086-22086/com.pchatanan.tut I/FA: App measurement is starting up, version: 9877 
11-14 23:22:15.462 22086-22086/com.pchatanan.tut I/FA: To enable debug logging run: adb shell setprop log.tag.FA VERBOSE 
11-14 23:22:15.471 22086-22086/com.pchatanan.tut I/FA: To enable faster debug mode event logging run: 
                 adb shell setprop firebase.analytics.debug-mode com.pchatanan.tut 
11-14 23:22:15.524 22086-22086/com.pchatanan.tut I/HwCust: Constructor found for class android.app.HwCustAlarmManagerImpl 
11-14 23:22:15.532 22086-22086/com.pchatanan.tut I/FirebaseInitProvider: FirebaseApp initialization successful 
11-14 23:22:25.611 22086-22133/com.pchatanan.tut W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found.

來源

2016-11-14 Aung

郵政爲崩潰的堆棧跟蹤。 –

對不起，但我是一個新手在這裏。我如何簡單地獲取崩潰的堆棧跟蹤？ – Aung

如果您從Android Studio運行，它將位於_Android Monitor_窗口logcat窗格中。 –

爲了取代遍歷事務線程中的每個節點，我使用.addListenerForSingleValueEvent並遍歷每個節點。然後，對於需要更新的那個，我運行事務代碼。此方法工作正常。

這在下面的代碼說明：

private static void incrementUnreadCount(String chatRoomId) { 

     final DatabaseReference mDatabaseMemberList = mDatabaseChatRooms.child(chatRoomId).child("memberList"); 

     mDatabaseMemberList.addListenerForSingleValueEvent(new ValueEventListener() { 
      @Override 
      public void onDataChange(DataSnapshot dataSnapshot) { 
       for(DataSnapshot child : dataSnapshot.getChildren()){ 
        if(!child.getKey().equals(TutUserManager.getCurrentUid())){ 

         mDatabaseMemberList.child(child.getKey()).runTransaction(new Transaction.Handler() { 
          @Override 
          public Transaction.Result doTransaction(MutableData mutableData) { 

           Map<String, Object> tempData = (Map<String, Object>) mutableData.getValue(); 
           if(tempData == null){ 
            return Transaction.success(mutableData); 
           } 
           long unreadCount = (long) tempData.get("unreadCount"); 
           unreadCount += 1; 
           tempData.put("unreadCount", unreadCount); 
           mutableData.setValue(tempData); 
           return Transaction.success(mutableData); 
          } 

          @Override 
          public void onComplete(DatabaseError databaseError, boolean b, DataSnapshot dataSnapshot) { 

          } 
         }); 

        } 
       } 
      } 

      @Override 
      public void onCancelled(DatabaseError databaseError) { 

      } 
     }); 

    }

來源

2016-11-14 16:57:35 Aung

Firebase（Android）：Transaction.success（mutableData）導致應用程序崩潰

回答

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