将对象列表添加到Firebase

问题描述：

我正在研究一些代码，这些代码会将“游戏”对象放入Firebase数据库中。每个游戏都有一个“玩家”的名称和阵列列表，每个玩家都有一个名字和一个“目标”。当我运行代码时，应用程序只是崩溃而没有明确的错误，它只是表明它不能执行该方法。我确定它与玩家名单有关，因为我早些时候可以用它来与游戏名称一起工作。将对象列表添加到Firebase

public void beginGame(View view) { 
    mDatabase = FirebaseDatabase.getInstance().getReference(); 


    EditText gameNameField = (EditText) findViewById(R.id.gameName); 
    String gameName = gameNameField.getText().toString().trim(); 
    Collections.shuffle(players); 
    if (gameName.isEmpty()) { 
     int duration = Toast.LENGTH_LONG; 

     Toast toast = Toast.makeText(getApplicationContext(), 
       R.string.toast_no_game_name, duration); 
     toast.show(); 

    } else if (playerNames.size() < 2) { 
     int duration = Toast.LENGTH_LONG; 

     Toast toast = Toast.makeText(getApplicationContext(), 
       R.string.toast_not_enough_players, duration); 
     toast.show(); 

    } else { 
     for (int i = 0; i < players.size(); i++) { 
      if (i != (players.size() - 1)) { 
       players.get(i).target = players.get(i + 1); 
      } else { 
       players.get(i).target = players.get(0); 
      } 
     } 
     Game game = new Game(gameName, players); 
     mDatabase.child("Games").child(gameName).setValue(game); 

     Intent intent = new Intent(StartNewGameActivity.this, SessionsActivity.class); 
     startActivity(intent); 
    } 
}

要清楚，我想我的数据的基础上组织成这样：

Games: 
    Game1: 
     name: Johns Game 
     Players: 
      John 
      Mike 

    Game2:......

编辑1 玩家在询问的玩家名称的对话框被初始化，然后通过玩家数组列表。

public void addNewPlayer(View view) { 
    DialogFragment newFragment = new CreatePlayerDialogFragment(); 
    newFragment.show(getSupportFragmentManager(), "Player"); 
} 

@Override 
public void onDialogPositiveClick(String name) { 
    playerNames.add(name); 
    players.add(new Player(name)); 
}

这里是从我的logcat错误

11-26 12:15:29.780 10730-10730/com.example.hunte.assassin E/AndroidRuntime: FATAL EXCEPTION: main 
    Process: com.example.hunte.assassin, PID: 10730 
    java.lang.IllegalStateException: Could not execute method for android:onClick 
     at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293) 
     at android.view.View.performClick(View.java:5217) 
     at android.view.View$PerformClick.run(View.java:21342) 
     at android.os.Handler.handleCallback(Handler.java:739) 
     at android.os.Handler.dispatchMessage(Handler.java:95) 
     at android.os.Looper.loop(Looper.java:148) 
     at android.app.ActivityThread.main(ActivityThread.java:5551) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620) 
    Caused by: java.lang.reflect.InvocationTargetException 
     at java.lang.reflect.Method.invoke(Native Method) 
     at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
     at android.view.View.performClick(View.java:5217)  
     at android.view.View$PerformClick.run(View.java:21342)  
     at android.os.Handler.handleCallback(Handler.java:739)  
     at android.os.Handler.dispatchMessage(Handler.java:95)  
     at android.os.Looper.loop(Looper.java:148)  
     at android.app.ActivityThread.main(ActivityThread.java:5551)  
     at java.lang.reflect.Method.invoke(Native Method)  
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730)  
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)  
    Caused by: java.lang.StackOverflowError: stack size 8MB 
     at java.lang.reflect.Method.invoke(Native Method) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
     at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
     at com.google.android.gms.internal.zzbq 
11-26 12:15:29.780 10730-10740/com.example.hunte.assassin I/art: Background sticky concurrent mark sweep GC freed 6950(796KB) AllocSpace objects, 0(0B) LOS objects, 0% free, 136MB/136MB, paused 42.643ms total 65.881ms 
11-26 12:15:30.129 1761-1821/? V/WindowOrientationListener: Proposed rotation changed! : currentRotation=0, proposedRotation=0, oldProposedRotation=-1, predictedRotation=0, timeDeltaMS=66.65039, isAccelerating=false, isFlat=false, isSwinging=false, isOverhead=false, isTouched=false, timeUntilSettledMS=0.0, timeUntilAccelerationDelayExpiredMS=0.0, timeUntilFlatDelayExpiredMS=0.0, timeUntilSwingDelayExpiredMS=0.0, timeUntilTouchDelayExpiredMS=0.0 
11-26 12:15:30.188 1761-2477/? D/sensors_hal_LGMotionAccel: processInd: LP2: X: 1.027176 Y: 4.640945 Z: 8.011398 SAM TS: 153411799 HAL TS:135753777272948 elapsedRealtimeNano:135753856670678 
11-26 12:15:30.311 10730-10730/com.example.hunte.assassin D/Error: ERR: exClass=java.lang.StackOverflowError 
11-26 12:15:30.311 10730-10730/com.example.hunte.assassin D/Error: ERR: exMsg=stack size 8MB 
11-26 12:15:30.311 10730-10730/com.example.hunte.assassin D/Error: ERR: file=Method.java 
11-26 12:15:30.311 10730-10730/com.example.hunte.assassin D/Error: ERR: class=java.lang.reflect.Method 
11-26 12:15:30.311 10730-10730/com.example.hunte.assassin D/Error: ERR: method=invoke line=-2 
11-26 12:15:30.381 10730-10730/com.example.hunte.assassin D/Error: ERR: stack=java.lang.IllegalStateException: Could not execute method for android:onClick 
    at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293) 
    at android.view.View.performClick(View.java:5217) 
    at android.view.View$PerformClick.run(View.java:21342) 
    at android.os.Handler.handleCallback(Handler.java:739) 
    at android.os.Handler.dispatchMessage(Handler.java:95) 
    at android.os.Looper.loop(Looper.java:148) 
    at android.app.ActivityThread.main(ActivityThread.java:5551) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620) 
Caused by: java.lang.reflect.InvocationTargetException 
    at java.lang.reflect.Method.invoke(Native Method) 
    at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
    at android.view.View.performClick(View.java:5217)  
    at android.view.View$PerformClick.run(View.java:21342)  
    at android.os.Handler.handleCallback(Handler.java:739)  
    at android.os.Handler.dispatchMessage(Handler.java:95)  
    at android.os.Looper.loop(Looper.java:148)  
    at android.app.ActivityThread.main(ActivityThread.java:5551)  
    at java.lang.reflect.Method.invoke(Native Method)  
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730)  
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)  
Caused by: java.lang.StackOverflowError: stack size 8MB 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzax(Unknown Source) 
    at com.google.android.gms.internal.zzbqi.zzaE(Unknown Source) 
    at com.google.android.gms.internal.zzbqi$zza.zzaF(Unknown Source) 
at com.google.android.gms.internal.zzbqi 
11-26 12:15:30.383 10730-10730/? D/Error: ERR: TOTAL BYTES WRITTEN: 20167208 
11-26 12:15:30.383 10730-10730/? E/JavaBinder: !!! FAILED BINDER TRANSACTION !!! (parcel size = 20167300) 
11-26 12:15:30.383 10730-10730/? E/AndroidRuntime: Error reporting crash 
android.os.TransactionTooLargeException: data parcel size 20167300 bytes 
at android.os.BinderProxy.transactNative(Native Method) 
at android.os.BinderProxy.transact(Binder.java:503) 
at android.app.ActivityManagerProxy.handleApplicationCrash(ActivityManagerNative.java:4547) 
at com.android.internal.os.RuntimeInit$UncaughtHandler.uncaughtException(RuntimeInit.java:90) 
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:693) 
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:690)

你能后的部分类似的问题球员初始化？也正是在你的Logcat中？ – rhari

@rhari编辑已在主帖中完成 –

答

所以事实证明我没有准确的播放器的构造函数（它没有采取实际的名称），但即时通讯张贴我的代码的情况下，在未来有

public void beginGame(View view) { 
    final FirebaseDatabase database = FirebaseDatabase.getInstance(); 
    DatabaseReference ref = database.getReference(); 

    EditText gameNameField = (EditText) findViewById(R.id.gameName); 
    String gameName = gameNameField.getText().toString().trim(); 
    Collections.shuffle(players); 
    if (gameName.isEmpty()) { 
     int duration = Toast.LENGTH_LONG; 

     Toast toast = Toast.makeText(getApplicationContext(), 
       R.string.toast_no_game_name, duration); 
     toast.show(); 

    } else if (playerNames.size() < 2) { 
     int duration = Toast.LENGTH_LONG; 

     Toast toast = Toast.makeText(getApplicationContext(), 
       R.string.toast_not_enough_players, duration); 
     toast.show(); 

    } else { 
     for (int i = 0; i < players.size(); i++) { 
      if (i != (players.size() - 1)) { 
       players.get(i).target = players.get(i + 1); 
      } else { 
       players.get(i).target = players.get(0); 
      } 
     } 
     Game game = new Game(gameName, players); 
     DatabaseReference gamesRef = ref.child("Games").child(gameName).child("players"); 
     Map<String, Player> gamePlayers = new HashMap<>(); 
     for(int i = 0; i < players.size(); i++){ 
      Player currentPlayer = players.get(i); 
      gamesRef.child(currentPlayer.getName()).setValue(currentPlayer); 

     } 

    } 
}

答

据我所知，你不能有以下的儿童很多值。尝试逐个设置值，每次为每个新玩家创建一个新的孩子。。mDatabase.child（ “游戏”）子（gameName）.child（playerName）;其中playerName被更改（i ++在数组列表中递增）并为每个项目创建新的子项。

将对象列表添加到Firebase

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