我想把来自firebase数据库的数据放在一个列表中,但是我得到了错误:"java.lang.IndexOutOfBoundsException: Invalid index 0,size is 0",我甚至试着在注释中所示的valueEventListener中手动添加到列表中,但仍然是空的 这是我的代码: public class Playing extends AppCompatActivity= FirebaseDatabase.getInstance().getReference().child("q
ValueEventListener eventListener = new ValueEventListener() { public//create new user
database.addListenerForSingleValueEvent(new ValueEventListenerValueEventListener eventListener = new ValueEven
com.google.firebase.database.DatabaseReference;import com.google.firebase.database.ValueEventListenerFirebaseDatabase.getInstance().getReference("uploads");
mDatabaseRef.addValueEventListener( new ValueEventListe