Question

按下登录按钮时崩溃。请指导如何解决这个问题

应用程序显示此错误

com.google.firebase.database.DatabaseException: 
  at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.<init> (CustomClassMapper.java)
  at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.loadOrCreateBeanMapperForClass (CustomClassMapper.java:12)
  at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertBean (CustomClassMapper.java)
  at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.deserializeToClass (CustomClassMapper.java)
  at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertToCustomClass (CustomClassMapper.java)
  at com.google.firebase.database.DataSnapshot.getValue (DataSnapshot.java)
  at com.usama.usamamart.LoginActivity$4.onDataChange (LoginActivity.java)
  at com.google.firebase.database.Query$1.onDataChange (Query.java:7)
  at com.google.firebase.database.core.ValueEventRegistration.fireEvent (ValueEventRegistration.java)
  at com.google.firebase.database.core.view.DataEvent.fire (DataEvent.java:2)
  at com.google.firebase.database.core.view.EventRaiser$1.run (EventRaiser.java)
  at android.os.Handler.handleCallback (Handler.java:888)
  at android.os.Handler.dispatchMessage (Handler.java:100)
  at android.os.Looper.loop (Looper.java:213)
  at android.app.ActivityThread.main (ActivityThread.java:8178)
  at java.lang.reflect.Method.invoke (Native Method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:513)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1101)

Answer 1

很可能您没有正确配置 ProGuard 以忽略用于从数据库读取数据的数据类。

鉴于您的问题缺乏详细信息，很难准确说出您做错了什么，因此我建议您最好阅读 configuring ProGuard 上的文档。

新创建的应用程序在 Google Play 商店发布后不起作用

1 个答案: