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我试图从firebase数据库检索一些数据并将其填充到recyclerview。查询背后的逻辑是显示异性用户作为当前用户,但同一个大厅。例如,如果当前用户是“男孩”并且在“Legon”大厅中,则从数据库填充legon大厅中的“女性”的回收站视图。如何使多个查询在Firebase中填充recyclerview?
用户数据库:
这就是我想要做的,但不工作
@Override
protected void onStart() {
super.onStart();
final String user_id = firebaseAuth.getCurrentUser().getUid();
final User user = new User();
final String halls = user.getHalls();
databaseReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot)
{
if(dataSnapshot.child("Male").hasChild(user_id)){
query = databaseReference.child("Female").orderByChild("halls").equalTo(halls);
}
else{
query = databaseReference.child("Male").orderByChild("halls").equalTo(halls);
}
}
@Override
public void onCancelled(DatabaseError databaseError){
}
});
FirebaseRecyclerAdapter<User, UserViewholder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<User, UserViewholder>(
User.class,
R.layout.users_row,
UserViewholder.class,
query
) {
@Override
protected void populateViewHolder(UserViewholder viewHolder, User model, int position) {
viewHolder.setUsername(model.getUsername());
viewHolder.setLevels(model.getLevels());
viewHolder.setDownloadUrl(getApplicationContext(), model.getDownloadUrl());
}
};
users2.setAdapter(firebaseRecyclerAdapter);
}
请“用户”只是我创建的类包含一些信息没有..它不是“firebaseUser”@Phan Van Linh –