I am developing a chat app using Firebase Realtime Database. I have been able to send and receive messages properly. Now, I want to implement notification whenever new message is received.i.e whenever any user sends a message a push notification triggers at other user device who have that app just like whatsapp. My main concern is how to do that part in my given below code?
OnlineActivity.java
import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.text.format.DateFormat;
import android.widget.Toast;
import com.firebase.ui.auth.AuthUI;
import com.firebase.ui.database.FirebaseListAdapter;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import hani.momanii.supernova_emoji_library.Actions.EmojIconActions;
import hani.momanii.supernova_emoji_library.Helper.EmojiconEditText;
import hani.momanii.supernova_emoji_library.Helper.EmojiconTextView;
import static com.yef.youthempower.youth.R.layout.activity_online;
public class OnlineActivity extends AppCompatActivity {
private static int SIGN_IN_REQUEST_CODE = 1;
private FirebaseListAdapter<ChatMessage> adapter;
RelativeLayout activity_online;
//Add Emojicon
EmojiconEditText emojiconEditText;
ImageView emojiButton,submitButton;
EmojIconActions emojIconActions;
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent
data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == SIGN_IN_REQUEST_CODE)
{
if(resultCode == RESULT_OK)
{
Snackbar.make(activity_online, "Successfully signed
in.Welcome!", Snackbar.LENGTH_SHORT).show();
displayChatMessage();
}
else{
Snackbar.make(activity_online,"We couldn't sign you in.Please
try again later", Snackbar.LENGTH_SHORT).show();
finish();
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_online);
activity_online=(RelativeLayout)findViewById(R.id.activity_online);
if (getSupportActionBar() != null) {
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
}
emojiButton = (ImageView)findViewById(R.id.emoji_button);
submitButton = (ImageView)findViewById(R.id.submit_button);
emojiconEditText =
(EmojiconEditText)findViewById(R.id.emojicon_edit_text);
emojIconActions = new
EmojIconActions(getApplicationContext(),
activity_online,emojiButton,emojiconEditText);
emojIconActions.ShowEmojicon();
submitButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
FirebaseDatabase.getInstance().getReference().push().setValue(new ChatMessage(emojiconEditText.getText().toString(),
FirebaseAuth.getInstance().getCurrentUser().getEmail()));
emojiconEditText.setText("");
emojiconEditText.requestFocus();
}
});
//Check if not sign-in then navigate Signin page
if(FirebaseAuth.getInstance().getCurrentUser() == null)
{
startActivityForResult(AuthUI.getInstance().createSignInIntentBuilder().build(),SIGN_IN_REQUEST_CODE);
}
else
{
Snackbar.make(activity_online,"Welcome "+FirebaseAuth.getInstance().getCurrentUser().getEmail(),Snackbar.LENGTH_SHORT).show();
//Load content
displayChatMessage();
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home)
finish();
return super.onOptionsItemSelected(item);
}
private void displayChatMessage() {
ListView listOfMessage = (ListView)findViewById(R.id.list_of_message);
adapter = new FirebaseListAdapter<ChatMessage>(this,ChatMessage.class,R.layout.list_items,FirebaseDatabase.getInstance().getReference())
{
@Override
protected void populateView(View v, ChatMessage model, int position) {
//Get references to the views of list_items.xml
TextView messageText, messageUser, messageTime;
messageText = (EmojiconTextView) v.findViewById(R.id.message_text);
messageUser = (TextView) v.findViewById(R.id.message_user);
messageTime = (TextView) v.findViewById(R.id.message_time);
messageText.setText(model.getMessageText());
messageUser.setText(model.getMessageUser());
messageTime.setText(DateFormat.format("dd-MM-yyyy (HH:mm:ss)", model.getMessageTime()));
}
};
listOfMessage.setAdapter(adapter);
}
}
