这是我的第一个功能：
private void loadUserList() {
Query query = FirebaseDatabase.getInstance().getReference().child(Commonx.USER_INFORMATION);
FirebaseRecyclerOptions<User> options = new FirebaseRecyclerOptions.Builder<User>()
.setQuery(query,User.class)
.build();
adapter = new FirebaseRecyclerAdapter<User, UserViewHolder>(options) {
@Override
protected void onBindViewHolder(@NonNull UserViewHolder userViewHolder, int i, @NonNull final User user) {
if(user.getEmail().equals(Commonx.loggedUser.getEmail())){
userViewHolder.txt_user_email.setText(new StringBuilder(user.getEmail()).append(" (me)"));
userViewHolder.itemView.setClickable(false);
userViewHolder.txt_user_email.setTypeface(userViewHolder.txt_user_email.getTypeface(), Typeface.ITALIC);
if(user.getImage()!=null){
Picasso.get().load(Commonx.loggedUser.getImage()).into(userViewHolder.recycler_profile_image);}
}
else {
if(user.getImage()!=null){
Picasso.get().load(user.getImage()).into(userViewHolder.recycler_profile_image);}
userViewHolder.txt_user_email.setText(new StringBuilder(user.getEmail()));
}
userViewHolder.setiRecycItemListerner(new IRecycItemListerner() {
@Override
public void onItemClickListener(View view, int position) {
showDialogRequest(user);
}
});
}
@NonNull
@Override
public UserViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.layout_user,parent,false);
return new UserViewHolder(itemView);
}
};
adapter.startListening();
recycler_all_user.setAdapter(adapter);
}
这是我的第二个功能：
private void loadFriendList() {
Query query = FirebaseDatabase.getInstance()
.getReference(Commonx.USER_INFORMATION)
.child(Commonx.loggedUser.getUid())
.child(Commonx.ACCEPT_LIST);
FirebaseRecyclerOptions<User> options = new FirebaseRecyclerOptions.Builder<User>()
.setQuery(query, User.class)
.build();
adapter = new FirebaseRecyclerAdapter<User, UserViewHolder>(options) {
@Override
protected void onBindViewHolder(@NonNull final UserViewHolder userViewHolder, int i, @NonNull final User user) {
userViewHolder.txt_user_email.setText(new StringBuilder(user.getEmail()));
DatabaseReference lmao;
//Picasso.get().load(Commonx.loggedUser.getImage()).into(userViewHolder.recycler_profile_image);
userViewHolder.setiRecycItemListerner(new IRecycItemListerner() {
@Override
public void onItemClickListener(View view, int position) {
//show tracking information
Commonx.trackingUser = user;
startActivity(new Intent(HomeActivity.this, TrackingActivity.class));
}
});
}
@NonNull
@Override
public UserViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.layout_user, parent, false);
return new UserViewHolder(itemView);
}
};
adapter.startListening();
recycler_friend_list.setAdapter(adapter);
}
在第一个功能中，我显示了所有用户，在第二个功能中，显示了用户的朋友。但是，我想运行第一个函数查询并通过第二个函数查询对其进行过滤。因为在我的Firebase数据库结构中，USER_INFORMATION包含图像，但朋友列表不包含图像。 最重要的是，我想同时运行两个查询，在第一个函数执行完之后，我想按第二个查询将其过滤掉。