Textchat

---

Android lightweight chating application with Maching learning ML-KIT

---

Using Tech:

• Java
• Xml
• Firebase,
• Firebase Push Notification
• Retrofit,
• Text Recognition with ML-KIT

---

Watch Demo : https://youtu.be/S2gbnVanKDA

---

Features

• User can register with phone number
• User can add personal info such name, profile image
• User can see userlist who are using TextChat from his/her mobile contact
• User can see who is online
• User can send text message each other
• User can chat by group
• User can see notification if someone message
• User can send message to retrieve text from image using Gallery or Camera

---

Screensorts with description

After open the application you will find the welcome screen that stay in 2.5 seconds. after you can see login screen that you can login with your name and phone number. After login with this you will get a verification code in the given phone number after input the code you can login

This is the welcome Screen | This is login screen | This is verification code :-------------------------:|:-------------------------:|:-------------------------: | |

---

After login you can see the main features of the application. At first you can see Chatlist where your chatlist will be available. you can see who is online or offline. you can also see the userlist that who used this application from your contact. You can also add your profile image from profile section.

Here is the chatlist | Here is userlist | Here is the profile :-------------------------:|:-------------------------:|:-------------------------: | |

---

Then you can chat anyone from the list and enter the chatbox. You can send text from capture any image using camera and featching text from that image

Chatbox | Find text from camera | Chatbox text from image :-------------------------:|:-------------------------:|:-------------------------: | |

---

In your phone gallery if any image have text then you can send it as text message by featching the text from the gallery image. there is also have logout option

Gallery image | Find text from gallery | This is logout option :-------------------------:|:-------------------------:|:-------------------------: | |

---

If you send message to anyone who is not online p but they have net connection with the phone then they will get your message notification

Sending message | Message notification :-------------------------:|:-------------------------: |

---

Feature Work

I will be added voice recognization function and also smart reply option by analyzing previous messages

---

Important code

• Userlist(Firebase) with comparing phone contact:

Cursor=getActivity().getApplicationContext().getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);

        while (cursor.moveToNext()) {
            String name = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
            phone = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
            if (phone.length() <= 10) {
                continue;
            }
            if (!String.valueOf(phone.charAt(0)).equals("+")) {
                phone = "+88" + phone;
            }
            phone = phone.replace(" ", "");
            phone = phone.replace("-", "");
            phone = phone.replace("(", "");
            phone = phone.replace(")", "");
            final UserObject mContact = new UserObject("", name, phone);
            contactList.add(mContact);

            final FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
            final DatabaseReference mUserDB = FirebaseDatabase.getInstance().getReference().child("Users");

            Query query = mUserDB.orderByChild("phone").equalTo(mContact.getPhone());
            query.addListenerForSingleValueEvent(new ValueEventListener() {

                @Override
                public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                   // mUsers.clear();
                   if (dataSnapshot.exists()) {

                            for (DataSnapshot childSnapshot : dataSnapshot.getChildren()) {
                                    User user = childSnapshot.getValue( User.class );
                                    if (!user.getId().equals( firebaseUser.getUid() )) {
                                        mUsers.add(user);
                                    }
                                }

                                userAdapter = new UserAdapter( getContext(), mUsers, false );
                                recyclerView.setAdapter( userAdapter );
                            }
                        }

                @Override
                public void onCancelled(@NonNull DatabaseError databaseError) {
                }
            });
        }
        cursor.close();

}

• Sending Message:

private void sendMessage(String sender, final String receiver, String message){
        DatabaseReference reference = FirebaseDatabase.getInstance().getReference();
        HashMap<String, Object> hashMap = new HashMap<>();
        hashMap.put("sender", sender);
        hashMap.put("receiver", receiver);
        hashMap.put("message", message);
        hashMap.put("isseen", false);
        reference.child("Chats").push().setValue(hashMap);
        final DatabaseReference chatRef = FirebaseDatabase.getInstance().getReference("Chatlist")
                .child(fuser.getUid())
                .child(userid);
        chatRef.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                if (!dataSnapshot.exists()){
                    chatRef.child("id").setValue(userid);
                }
            }
            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {
            }
        });   
        final DatabaseReference chatRefReceiver = FirebaseDatabase.getInstance().getReference("Chatlist")
                .child(userid)
                .child(fuser.getUid());
        chatRefReceiver.child("id").setValue(fuser.getUid());
        final String msg = message;
        reference = FirebaseDatabase.getInstance().getReference("Users").child(fuser.getUid());
        reference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                User user = dataSnapshot.getValue(User.class);
                if (notify) {
                    sendNotifiaction(receiver, user.getUsername(), msg);
                }
                notify = false;
            }
            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });
    }

• Receiving/Reading Message:

private void readMesagges(final String myid, final String userid, final String imageurl){
        mchat = new ArrayList<>();
        reference = FirebaseDatabase.getInstance().getReference("Chats");
        reference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                mchat.clear();
                for (DataSnapshot snapshot : dataSnapshot.getChildren()){
                    Chat chat = snapshot.getValue(Chat.class);
                    if (chat.getReceiver().equals(myid) && chat.getSender().equals(userid) ||
                            chat.getReceiver().equals(userid) && chat.getSender().equals(myid)){
                        mchat.add(chat);
                    }
                    messageAdapter = new MessageAdapter(MessageActivity.this, mchat, imageurl);
                    recyclerView.setAdapter(messageAdapter);
                }
            }
            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        }

• Message Notification:

private void sendNotifiaction(String receiver, final String username, final String message){
        DatabaseReference tokens = FirebaseDa