从Firebase检索值；类型未知

Question

我的firebase结构如下所示。

Firebase pic

我有两种类型的用户。获取快照时，如何根据Firebase中存储的类型实例化对象。我的代码在下面

if(task.isSuccessful()){
   DatabaseReference databaseReference;
   FirebaseUser firebaseUser = firebaseAuth.getCurrentUser();

     if(firebaseUser != null){
        databaseReference = firebaseDatabase.getReference("User").child(firebaseUser.getUid());
        databaseReference.addValueEventListener(new ValueEventListener() {
           @Override
           public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
              //HOW CAN I FIX THIS TO BE THE CORRECT USER TYPE
              User user = dataSnapshot.getValue(User.class);
              Intent intent = null;
              if(user != null){
                 //IF USER IS TYPE 1, CREATE USER OF TYPE 1 AND ADD STUFF TO MY INTENT
                 //IF USER IS TYPE 2, CREATE USER OF TYPE 2 AND ADD STUFF TO MY INTENT
                 finish();
                 startActivity (intent);
              }
        }
     }
  }

Answer 1

为此，您只需从数据库中检查节点userTypeId的值，然后执行所需的操作即可。

我的意思在代码中看起来像这样：

databaseReference.addListenerForSingleValueEvent(new ValueEventListener() {

            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                if(user != null){

                 if(dataSnapshot.child("userTypeId").getValue(String.class).equals(0))
                        // user type 1
                 else 
                       // user type 2

                finish();
                startActivity (intent);
               }
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {
                Log.d(TAG, "onCancelled", databaseError.toException());
            }


        });