Firebase Permission denied (read and write) with Authentication

Question

I want to read and write in my database with authentication but I got a Permission denied for both. I'm trying to figure out why it's not working.

I used the default rules since I want authentication, as explained in the doc.

The default rules require Authentication. They allow full read and write > access to authenticated users of your app. They are useful if you want data open > to all users of your app but don't want it open to the world.

• Firebase rules :

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

• Create user :

     auth.createUserWithEmailAndPassword(email, password)
          .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
              @Override
              public void onComplete(@NonNull Task<AuthResult> task) {
                  Log.d("USER_CREATE", "createUserWithEmail:onComplete:" + task.isSuccessful());
  
                  // If sign in fails, display a message to the user. If sign in succeeds
                  // the auth state listener will be notified and logic to handle the
                  // signed in user can be handled in the listener.
                  if (!task.isSuccessful()) {
                      Toast.makeText(getApplicationContext(), "Authentication failed.",
                              Toast.LENGTH_SHORT).show();
                  } else {
                      startActivity(new Intent(SignupActivity.this, MainActivity.class));
                      finish();
                  }
  
                  // ...
              }
          });
  

• Sign in user :

  auth.signInWithEmailAndPassword(email, password)
          .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
              @Override
              public void onComplete(@NonNull Task<AuthResult> task) {
                  Log.d("COMPLETE", "signInWithEmail:onComplete:" + task.isSuccessful());
              }
          });
  

I got an AuthListenerand it logs me that the user is signed in.

• AuthListener :

  mAuthListener = new FirebaseAuth.AuthStateListener() {
          @Override
          public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
              FirebaseUser user = firebaseAuth.getCurrentUser();
              if (user != null) {
                  // User is signed in
                  Log.d("TAG", "onAuthStateChanged:signed_in:" + user.getUid());
              } else {
                  // User is signed out
                  Log.d("TAG", "onAuthStateChanged:signed_out");
              }
              // ...
          }
      };
      // ...
  

• Read test : (with a node I manually added in the database)

  firebase.child("test").addValueEventListener(new ValueEventListener() {
  
      @Override
      public void onDataChange(DataSnapshot snapshot) {
          Log.d("result", snapshot.getValue()+"");
      }
  
      @Override
      public void onCancelled(FirebaseError error) {
          Log.d("The read failed: ", error.getMessage());
      }
  });
  

• Write test : I want a main node userswith two categories of users : devsand employers.

  Firebase usersRef  = firebase.child("users").child("devs");
      FirebaseUser user = auth.getCurrentUser();
  
  Map<String, String> userMap = new HashMap<String, String>();
  userMap.put("name", "blabla");
  userMap.put("city", "Brussels");
  
  Map<String, Map<String, String>> users = new HashMap<String, Map<String, String>>();
  users.put(user.getUid().toString(), userMap);
  usersRef.setValue(users);
  

• Logs :

  D/AUTH LISTENER: onAuthStateChanged:signed_in:wnomkwiOWOb4wNNLSsrWeT5xxUq1
  D/USER_CREATE: createUserWithEmail:onComplete:true
  I/AppCompatViewInflater: app:theme is now deprecated. Please move to using android:theme instead.
  D/ACTION BAR?: android.support.v7.app.ToolbarActionBar@36c3cd2a
  W/SyncTree: Listen at /test failed: FirebaseError: Permission denied
  D/The read failed:: Permission denied
  D/FirebaseAuth: Notifying listeners about user ( wnomkwiOWOb4wNNLSsrWeT5xxUq1 ).
  D/FirebaseAuth: Notifying listeners about user ( wnomkwiOWOb4wNNLSsrWeT5xxUq1 ).
  D/FirebaseApp: Notifying auth state listeners.
  D/FirebaseApp: Notified 0 auth state listeners.
  D/AUTH LISTENER: onAuthStateChanged:signed_in:wnomkwiOWOb4wNNLSsrWeT5xxUq1
  D/FirebaseApp: Notifying auth state listeners.
  D/FirebaseApp: Notified 0 auth state listeners.
  D/AUTH LISTENER: onAuthStateChanged:signed_in:wnomkwiOWOb4wNNLSsrWeT5xxUq1
  D/COMPLETE: signInWithEmail:onComplete:true
  

I made those 2 tests with public permission (write : true, read : true) and it was working, so something must be wrong with my authentication. I'm probably misunderstanding/missing something but don't really see what exactly. Would be very nice If someone would like to enlighten me!

Answer 1

You're mixing the old Firebase SDK with the new Firebase SDK. Remove firebase-android-sdk 2.5.2 from your build.gradle and update your imports to use the new DatabaseReference class instead of the Firebase class.