This is the Part 9 of "Build a Social Media App on Android Studio" tutorial, and we are going to cover the following functionalities in this article:
- We are going to Search For a user on the Users Page.
- If there are few people registered in our app then it is easy to search for a person.
- But what happens when we have 1000 users registered in our app then searching for a particular user became a very complicated and time taking task.
- That's why we are implementing this feature to search for a user using the name or email provided.
Step By Step Implementation
Step 1: Working with the main_menu.xml file
Add the Search icon in the main_menu.xml file.
<item
android:id="@+id/search"
android:icon="@drawable/ic_search"
android:title="Search"
app:actionViewClass="android.widget.SearchView"
app:showAsAction="always">
</item>
Step 2: Working with the UsersFragment.java file
Add the searchusers() in this file.
private void searchusers(final String s) {
final FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Users");
reference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
usersList.clear();
for (DataSnapshot dataSnapshot1 : dataSnapshot.getChildren()) {
ModelUsers modelUsers = dataSnapshot1.getValue(ModelUsers.class);
if (!modelUsers.getUid().equals(firebaseUser.getUid())) {
if (modelUsers.getName().toLowerCase().contains(s.toLowerCase()) ||
modelUsers.getEmail().toLowerCase().contains(s.toLowerCase())) {
usersList.add(modelUsers);
}
}
adapterUsers = new AdapterUsers(getActivity(), usersList);
adapterUsers.notifyDataSetChanged();
recyclerView.setAdapter(adapterUsers);
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
Below is the updated code for the UsersFragment.java file.
package com.example.socialmediaapp;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.SearchView;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.view.MenuItemCompat;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import java.util.ArrayList;
import java.util.List;
/**
* A simple {@link Fragment} subclass.
*/
public class UsersFragment extends Fragment {
RecyclerView recyclerView;
AdapterUsers adapterUsers;
List<ModelUsers> usersList;
FirebaseAuth firebaseAuth;
public UsersFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_users, container, false);
recyclerView = view.findViewById(R.id.recyclep);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
usersList = new ArrayList<>();
firebaseAuth = FirebaseAuth.getInstance();
getAllUsers();
return view;
}
private void getAllUsers() {
final FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Users");
reference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
usersList.clear();
for (DataSnapshot dataSnapshot1 : dataSnapshot.getChildren()) {
ModelUsers modelUsers = dataSnapshot1.getValue(ModelUsers.class);
if (modelUsers.getUid() != null && !modelUsers.getUid().equals(firebaseUser.getUid())) {
usersList.add(modelUsers);
}
adapterUsers = new AdapterUsers(getActivity(), usersList);
recyclerView.setAdapter(adapterUsers);
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
private void searchusers(final String s) {
final FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Users");
reference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
usersList.clear();
for (DataSnapshot dataSnapshot1 : dataSnapshot.getChildren()) {
ModelUsers modelUsers = dataSnapshot1.getValue(ModelUsers.class);
if (modelUsers.getUid() != null && !modelUsers.getUid().equals(firebaseUser.getUid())) {
if (modelUsers.getName().toLowerCase().contains(s.toLowerCase()) ||
modelUsers.getEmail().toLowerCase().contains(s.toLowerCase())) {
usersList.add(modelUsers);
}
}
adapterUsers = new AdapterUsers(getActivity(), usersList);
adapterUsers.notifyDataSetChanged();
recyclerView.setAdapter(adapterUsers);
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
setHasOptionsMenu(true);
super.onCreate(savedInstanceState);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.main_menu, menu);
menu.findItem(R.id.logout).setVisible(false);
MenuItem item = menu.findItem(R.id.search);
SearchView searchView = (SearchView) MenuItemCompat.getActionView(item);
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
if (!TextUtils.isEmpty(query.trim())) {
searchusers(query);
} else {
getAllUsers();
}
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
if (!TextUtils.isEmpty(newText.trim())) {
searchusers(newText);
} else {
getAllUsers();
}
return false;
}
});
super.onCreateOptionsMenu(menu, inflater);
}
}
Output:
Note: Please Add drawable items before running the Application
Below is the file structure after performing these operations:
