仅在将应用发布到Google Play后才执行Firebase DatabseError-Android [英] Firebase DatabseError only after app is relesased to google play - android

问题描述

我正在制作一个使用Firebase数据库的应用程序.我的应用程序没有崩溃，直到我在Google Play上将其发布为Beta版本为止.当我发布该应用程序时，它一直崩溃，并在一行上返回com.google.firebase.database.DatabaseException.完全相同但未发布的代码不会崩溃.

I'm making an app that uses the firebase database. My app was working with no crashes, until I released it as beta on google play. When I released the app it kept crashing and returning a com.google.firebase.database.DatabaseException on one line. The exact same code but unreleased does not crash.

这是整个堆栈跟踪:

com.google.firebase.database.DatabaseException: 
    at com.google.android.gms.internal.zzelx.<init> (Unknown Source)
    at com.google.android.gms.internal.zzelw.zzf (Unknown Source)
    at com.google.android.gms.internal.zzelw.zzbx (Unknown Source)
    at com.google.android.gms.internal.zzelw.zzbw (Unknown Source)
    at com.google.firebase.database.DatabaseReference.zza (Unknown Source)
    at com.google.firebase.database.DatabaseReference.setValue(UnknownSource)

    at aheschl.studyup.NewSet$2.onClick (NewSet.java:129)

android.view.View.performClick上的

    at android.view.View.performClick (View.java:6308)
    at android.widget.TextView.performClick (TextView.java:11202)
    at android.view.View$PerformClick.run (View.java:23969)
    at android.os.Handler.handleCallback (Handler.java:751)
    at android.os.Handler.dispatchMessage (Handler.java:95)
    at android.os.Looper.loop (Looper.java:154)
    at android.app.ActivityThread.main (ActivityThread.java:6816)
    at java.lang.reflect.Method.invoke (Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:1563)
    at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1451)

这是来自onClickListener的堆栈跟踪所引用的代码(带有blockquote的行是触发错误的原因):

Here is the code from the onClickListener that the stack trace references(the line with a blockquote is what is triggering the error):

CardSet newSetOfWords = new CardSet(name, words);

String id;

id = user.getUid();

DatabaseReference newReference = database.getReference(id + "/" + name);

newReference.setValue(newSetOfWords);

Intent i = new Intent(NewSet.this, TeacherView.class);

startActivity(i);

finish();

我不知道这是否有帮助，但这是我的数据库访问规则:

I don't know if this could help but here is my database access rules:

{
  "rules": {
      ".read": "true",
      ".write": "auth != null"
   }
 }

更新-

这是proguard-rules.pro

Here's the proguard-rules.pro

# Add project specific ProGuard rules here.
# You can control the set of applied configuration files using the
# proguardFiles setting in build.gradle.
#
# For more details, see
#   http://developer.android.com/guide/developing/tools/proguard.html

# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
#   public *;
#}

# Uncomment this to preserve the line number information for
# debugging stack traces.
#-keepattributes SourceFile,LineNumberTable

# If you keep the line number information, uncomment this to
# hide the original source file name.
#-renamesourcefileattribute SourceFile

# Add this global rule
-keepattributes Signature

# This rule will properly ProGuard all the model classes in

//This is what I copied off  the guide on the firebase website

# the package com.yourcompany.models. Modify to fit the structure
# of your app.
-keepclassmembers class aheschl.studyup.** {
  *;
}

这是CardSet:

public class CardSet {

    private String name;

    private ArrayList<String> words;

    public CardSet(String name, ArrayList<String> words){
        this.name = name;
        this.words = words;
    }

    protected String getName(){
        return name;
    }

    protected ArrayList<String> getWords(){
        return words;
    }

}

感谢您的帮助！

推荐答案

POJO getter/setter方法必须为 public :

The POJO getter/setter methods must be public:

public class CardSet {

    private String name;

    private ArrayList<String> words;

    public CardSet(String name, ArrayList<String> words){
        this.name = name;
        this.words = words;
    }

    public String getName() {  // changed from protected
        return name;
    }

    public ArrayList<String> getWords(){  // changed from protected
        return words;
    }

}

并且在使用 minifyEnabled 构建发行版本时，必须将Proguard配置为保留POJO类.这在 Android实时数据库安装指南中进行了描述:

And when building for release with minifyEnabled, Proguard must be configured to retain POJO classes. This is described in the Realtime Database for Android Setup Guide:

# Add this global rule
-keepattributes Signature

# This rule will properly ProGuard all the model classes in
# the package aheschl.studyup.
-keepclassmembers class aheschl.studyup.** {
  *;
}

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