我在回收者视图中需要一个searchview。回收者视图应该是不可见的,并且一旦我们搜索,结果应该是可见的。但是我无法做到这一点,请帮助我。我正在使用Android 7并使用Firebase作为服务器。我将活动粘贴。 (ChatsFragment和联系人)。我已经搜索了这个问题。但是他们使用适配器作为单独的类。但是在我的代码适配器中却是同一活动。我是Android的新手。所以我不知道我正在使用互联网上提供的代码构建聊天应用程序。预先感谢。
public class ChatsFragment extends Fragment
{
private View PrivateChatsView;
private RecyclerView chatsList;
private DatabaseReference ChatsRef, UsersRef;
private FirebaseAuth mAuth;
private String currentUserID="";
public ChatsFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
PrivateChatsView = inflater.inflate(R.layout.fragment_chats, container, false);
mAuth = FirebaseAuth.getInstance();
currentUserID = mAuth.getCurrentUser().getUid();
ChatsRef = FirebaseDatabase.getInstance().getReference().child("Contacts").child(currentUserID);
UsersRef = FirebaseDatabase.getInstance().getReference().child("Users");
chatsList = (RecyclerView) PrivateChatsView.findViewById(R.id.chats_list);
chatsList.setLayoutManager(new LinearLayoutManager(getContext()));
return PrivateChatsView;
}
@Override
public void onStart()
{
super.onStart();
FirebaseRecyclerOptions<Contacts> options =
new FirebaseRecyclerOptions.Builder<Contacts>()
.setQuery(ChatsRef, Contacts.class)
.build();
FirebaseRecyclerAdapter<Contacts, ChatsViewHolder> adapter =
new FirebaseRecyclerAdapter<Contacts, ChatsViewHolder>(options) {
@Override
protected void onBindViewHolder(@NonNull final ChatsViewHolder holder, int position, @NonNull Contacts model)
{
final String usersIDs = getRef(position).getKey();
final String[] retImage = {"default_image"};
UsersRef.child(usersIDs).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot)
{
if (dataSnapshot.exists())
{
if (dataSnapshot.hasChild("image"))
{
retImage[0] = dataSnapshot.child("image").getValue().toString();
Picasso.get().load(retImage[0]).into(holder.profileImage);
}
final String retName = dataSnapshot.child("name").getValue().toString();
final String retStatus = dataSnapshot.child("status").getValue().toString();
holder.userName.setText(retName);
if (dataSnapshot.child("userState").hasChild("state"))
{
String state = dataSnapshot.child("userState").child("state").getValue().toString();
String date = dataSnapshot.child("userState").child("date").getValue().toString();
String time = dataSnapshot.child("userState").child("time").getValue().toString();
if (state.equals("online"))
{
holder.userStatus.setText("online");
}
else if (state.equals("offline"))
{
holder.userStatus.setText("Last Seen: " + date + " " + time);
}
}
else
{
holder.userStatus.setText("offline");
}
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view)
{
Intent chatIntent = new Intent(getContext(), ChatActivity.class);
chatIntent.putExtra("visit_user_id", usersIDs);
chatIntent.putExtra("visit_user_name", retName);
chatIntent.putExtra("visit_image", retImage[0]);
startActivity(chatIntent);
}
});
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
@NonNull
@Override
public ChatsViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i)
{
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.users_display_layout, viewGroup, false);
return new ChatsViewHolder(view);
}
};
chatsList.setAdapter(adapter);
adapter.startListening();
}
public static class ChatsViewHolder extends RecyclerView.ViewHolder
{
CircleImageView profileImage;
TextView userStatus, userName;
public ChatsViewHolder(@NonNull View itemView)
{
super(itemView);
profileImage = itemView.findViewById(R.id.users_profile_image);
userStatus = itemView.findViewById(R.id.user_status);
userName = itemView.findViewById(R.id.user_profile_name);
}
}
}```
This is Contacts.java
```public class Contacts {
public String name, status, image;
public Contacts()
{
}
public Contacts(String name, String status, String image) {
this.name = name;
this.status = status;
this.image = image;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
}```
![enter image description here](https://i.stack.imgur.com/XhKSc.jpg)![enter image description here](https://i.stack.imgur.com/DqgUi.jpg)![enter image description here](https://i.stack.imgur.com/nUaNK.jpg)![enter image description here](https://i.stack.imgur.com/o1nnQ.jpg)![enter image description here](https://i.stack.imgur.com/5Qfed.jpg)
您可以在文本更改侦听器上使用editText`
etSearchWord.addTextChangedListener(object : TextWatcher {
override fun afterTextChanged(s: Editable?) {
}
override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
//here you can hide the recycleView
}
override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
if (s.toString().isNotEmpty()) {
rvAutoCompResult.visible()
autoCompleteItems(s.toString())
} else
rvAutoCompResult.gone()
}
})
`在适配器中,您可以使用Filterable过滤数据