I want to insert the values ​​in the Map before this one brought the log all ok but added them to the Map started swearing

@Override public void onDataChange(DataSnapshot dataSnapshot) { Log.d(TAG, "Shot" + dataSnapshot.getValue()); Map<String, String> map = dataSnapshot.getValue(Map.class); String name = map.get("Name"); String age = map.get("Age"); Log.v("E_VALUE", "Name: " + name ); Log.v("E_VALUE", "Age: " + age );

Mistake

10-17 11: 31: 57.208 18095-18095 / com.example.elvir.firedb E / AndroidRuntime: FATAL EXCEPTION: main Process: com.example.elvir.firedb, PID: 18095 com.google.firebase.database.DatabaseException: Class java.util.Map has generic type parameters, please use GenericTypeIndicator instead of com.google.android.gms.internal.zzamy.zzb (Unknown Source) at com.google.android.gms.internal.zzamy.zza (Unknown Source ) at com.google.firebase.database.DataSnapshot.getValue (Unknown Source) at com.example.elvir.firedb.MainActivity $ 1 $ override.onDataChange (MainActivity.java:35) at com.example.elvir.firedb.MainActivity $ 1 $ override.access $ dispatch (MainActivity.java) at com.example.elvir.firedb.MainActivity $ 1.onDataChange (MainActivity.java Following) at com.google.android.gms.internal.zzajp.zza (Unknown Source) at com.google.android.gms.internal.zzakp.zzcxi (Unknown Source) at com.google.android.gms.internal.zzaks $ 1.run (Unknown Source) at android.os.Handler.handleCallback (Handler.java:733 ) at android.os.Handler.dispatchMessag e (Handler.java:95) at android.os.Looper.loop (Looper.java:136) at android.app.ActivityThread.main (ActivityThread.java.ln001) at java.lang.reflect.Method.invokeNative (Native Method) at java.lang.reflect.Method.invoke (Method.java including 15) at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:785) at com.android.internal.os.ZygoteInit .main (ZygoteInit.java:601) at dalvik.system.NativeStart.main (Native Method)

    1 answer 1

    The error indicates that the Map class has parameters that are not specified in the call to getValue.

    Try to get the value and bring it to the desired type:

     Map<String, String> map = (Map<String, String>) dataSnapshot.getValue(); ...

    PS If you enter an error message in Google, the first result is a question on Stackoverflow . There in the answers there is also a solution using GenericTypeIndicator

    • Thanks, it worked, but I did everything pralno did not understand what was the error) - elik
    • one
      @elik you tried to get Map.class , while the real object is of type Map<String, String> - default locale
    • aa is now clearer - elik