Firebase Social Media App Complete Android Tutorials

Firebase Social Media App using Android Studio and Firebase

✓Registration using Email/Password

✓Login using Email/Password, Google, Phone 

✓Recover password in case you forgot 

✓Profile [Name, Email, Profile Pic, Phone, etc] 

✓Update 

✓Add Posts [Publisher name, email; Title, Image Description, Date & Time etc] 

✓All Posts, User Specific Posts 

✓Like Post 

✓Comment Post 

✓Delete, Edit your post

Firebase Social Media App Complete Android Tutorials

Complete Videos Playlist

When presses like button, refreshes whole list - Fixed

package com.blogspot.atifsoftwares.firebaseapp.fragments;


import android.content.Intent;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.core.view.MenuItemCompat;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.appcompat.widget.SearchView;
import android.text.TextUtils;
import android.util.Log;
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.Toast;

import com.blogspot.atifsoftwares.firebaseapp.AddPostActivity;
import com.blogspot.atifsoftwares.firebaseapp.MainActivity;
import com.blogspot.atifsoftwares.firebaseapp.R;
import com.blogspot.atifsoftwares.firebaseapp.SettingsActivity;
import com.blogspot.atifsoftwares.firebaseapp.adapters.AdapterPosts;
import com.blogspot.atifsoftwares.firebaseapp.models.ModelPost;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.ChildEventListener;
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 HomeFragment extends Fragment {

    //firebase auth
    FirebaseAuth firebaseAuth;

    RecyclerView recyclerView;
    List<ModelPost> postList;
    AdapterPosts adapterPosts;

    public HomeFragment() {
        // 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_home, container, false);

        //init
        firebaseAuth = FirebaseAuth.getInstance();

        //recycler view and its properties
        recyclerView = view.findViewById(R.id.postsRecyclerview);
        LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
        //show newest post first, for this load from last
        layoutManager.setStackFromEnd(true);
        layoutManager.setReverseLayout(true);
        //set layout to recyclerview
        recyclerView.setLayoutManager(layoutManager);

        //init post list
        postList = new ArrayList<>();

        loadPosts();

        return view;
    }

    private void loadPosts() {
        postList = new ArrayList<>();
        postList.clear();

        adapterPosts = new AdapterPosts(getActivity(), postList);
        recyclerView.setAdapter(adapterPosts);

        //path of all posts
        DatabaseReference ref = FirebaseDatabase.getInstance().getReference("Posts");
        //get all data from this ref
        ref.addChildEventListener(new ChildEventListener() {
            @Override
            public void onChildAdded(@NonNull DataSnapshot dataSnapshot, @Nullable String previousChildName) {
                ModelPost modelPost = dataSnapshot.getValue(ModelPost.class);
                postList.add(modelPost);
                adapterPosts.notifyItemInserted(postList.size() - 1);
            }

            @Override
            public void onChildChanged(@NonNull DataSnapshot dataSnapshot, @Nullable String previousChildName) {
                Log.i("mytag", "child changed");
                ModelPost modelPost = dataSnapshot.getValue(ModelPost.class);
                for (int i = 0; i < postList.size(); i++) {
                    if (postList.get(i).getUid().equals(modelPost.getUid())) {
                        postList.set(i, modelPost);
                        Log.i("mytag", "changed child found at position: " + i);
                        adapterPosts.notifyItemChanged(i);
                        break;
                    }
                }
            }

            @Override
            public void onChildRemoved(@NonNull DataSnapshot dataSnapshot) {
                Log.i("mytag", "child removed");
                ModelPost modelPost = dataSnapshot.getValue(ModelPost.class);
                for (int i = 0; i < postList.size(); i++) {
                    if (postList.get(i).getUid().equals(modelPost.getUid())) {
                        postList.remove(i);
                        Log.i("mytag", "removed child found at position: " + i);
                        adapterPosts.notifyItemRemoved(i);
                        break;
                    }
                }
            }

            @Override
            public void onChildMoved(@NonNull DataSnapshot snapshot, @Nullable String previousChildName) {

            }

            @Override
            public void onCancelled(@NonNull DatabaseError error) {

            }
        });
    }

    private void searchPosts(final String searchQuery){
        postList = new ArrayList<>();
        postList.clear();

        adapterPosts = new AdapterPosts(getActivity(), postList);
        recyclerView.setAdapter(adapterPosts);

        //path of all posts
        DatabaseReference ref = FirebaseDatabase.getInstance().getReference("Posts");
        //get all data from this ref
        ref.addChildEventListener(new ChildEventListener() {
            @Override
            public void onChildAdded(@NonNull DataSnapshot dataSnapshot, @Nullable String previousChildName) {
                ModelPost modelPost = dataSnapshot.getValue(ModelPost.class);

                if (modelPost.getpTitle().toLowerCase().contains(searchQuery.toLowerCase()) ||
                        modelPost.getpDescr().toLowerCase().contains(searchQuery.toLowerCase())){
                    postList.add(modelPost);
                    adapterPosts.notifyItemInserted(postList.size() - 1);
                }
            }

            @Override
            public void onChildChanged(@NonNull DataSnapshot dataSnapshot, @Nullable String previousChildName) {
                Log.i("mytag", "child changed");
                ModelPost modelPost = dataSnapshot.getValue(ModelPost.class);
                for (int i = 0; i < postList.size(); i++) {
                    if (postList.get(i).getUid().equals(modelPost.getUid())) {
                        postList.set(i, modelPost);
                        Log.i("mytag", "changed child found at position: " + i);
                        adapterPosts.notifyItemChanged(i);
                        break;
                    }
                }
            }

            @Override
            public void onChildRemoved(@NonNull DataSnapshot dataSnapshot) {
                Log.i("mytag", "child removed");
                ModelPost modelPost = dataSnapshot.getValue(ModelPost.class);
                for (int i = 0; i < postList.size(); i++) {
                    if (postList.get(i).getUid().equals(modelPost.getUid())) {
                        postList.remove(i);
                        Log.i("mytag", "removed child found at position: " + i);
                        adapterPosts.notifyItemRemoved(i);
                        break;
                    }
                }
            }

            @Override
            public void onChildMoved(@NonNull DataSnapshot snapshot, @Nullable String previousChildName) {

            }

            @Override
            public void onCancelled(@NonNull DatabaseError error) {

            }
        });


    }


    private void checkUserStatus(){
        //get current user
        FirebaseUser user = firebaseAuth.getCurrentUser();
        if (user != null){
            //user is signed in stay here
            //set email of logged in user
            //mProfileTv.setText(user.getEmail());
        }
        else {
            //user not signed in, go to main acitivity
            startActivity(new Intent(getActivity(), MainActivity.class));
            getActivity().finish();
        }
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        setHasOptionsMenu(true);//to show menu option in fragment
        super.onCreate(savedInstanceState);
    }

    /*inflate options menu*/
    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        //inflating menu
        inflater.inflate(R.menu.menu_main, menu);

        //hide some options
        menu.findItem(R.id.action_create_group).setVisible(false);
        menu.findItem(R.id.action_add_participant).setVisible(false);
        menu.findItem(R.id.action_groupinfo).setVisible(false);

        //searchview to search posts by post title/description
        MenuItem item = menu.findItem(R.id.action_search);
        SearchView searchView = (SearchView)MenuItemCompat.getActionView(item);

        //search listener
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String s) {
                //called when user press search button
                if (!TextUtils.isEmpty(s)){
                    searchPosts(s);
                }
                else {
                    loadPosts();
                }
                return false;
            }

            @Override
            public boolean onQueryTextChange(String s) {
                //called as and when user press any letter
                if (!TextUtils.isEmpty(s)){
                    searchPosts(s);
                }
                else {
                    loadPosts();
                }
                return false;
            }
        });

        super.onCreateOptionsMenu(menu, inflater);
    }

    /*handle menu item clicks*/
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        //get item id
        int id = item.getItemId();
        if (id == R.id.action_logout){
            firebaseAuth.signOut();
            checkUserStatus();
        }
        else if (id == R.id.action_add_post){
            startActivity(new Intent(getActivity(), AddPostActivity.class));
        }
        else if (id==R.id.action_settings){
            //go to settings activity
            startActivity(new Intent(getActivity(), SettingsActivity.class));
        }

        return super.onOptionsItemSelected(item);
    }

}