Answers for "add firebase to android"

add firebase angular

npm install firebase @angular/fire

how to connect with firebase in android studio manually

FIRE BASE AUTOMATICALLY SETUP
1. ANDROID STUDIO -> TOOLS -> FIRE BASE 
2. FIRE BASE ASSISTANT OPEN 
3. FROM ASSISTANT GO TO ANY FIRE BASE PRODUCT AND OPEN IT
4. CLICK CONNECT TO FIREBASE
5. CLICK ADD DEPENDENCIES

how to connect with firebase in android studio manually

FIRE BASE MANUALL SETUP
1. GO TO FIREBASE CONSOLE
2. CREATE NEW PROJECT 
3. ADD ANDROID PACAKAGE NAME 
4. ADD SHA-1
5. ADD NICKNAME 
6. DOWNLOAD JSON FILE ADD COPY/PASTE TO YOUR PROJECT 
7. DOWNLOAD DEPENDENCIES

firebase connecten

package com.example.phonechat;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.Executor;

public class RegistrationActivity extends AppCompatActivity {


    private Button mRegistration;
    private EditText mEmail, mPassowrd, mName;

    private FirebaseAuth mAuth;
    private FirebaseAuth.AuthStateListener firebaseAuthStateListener;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);

        firebaseAuthStateListener = new FirebaseAuth.AuthStateListener() {
            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
                if (user!=null) {
                    Intent intent = new Intent(getApplication(), MainActivity.class);
                    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                    startActivity(intent);
                    finish();
                    return;
                }

            }
        };
        mAuth = FirebaseAuth.getInstance();

        mRegistration = findViewById(R.id.registration);
        mEmail = findViewById(R.id.gmail);
        mName = findViewById(R.id.name);
        mPassowrd = findViewById(R.id.password);


        mRegistration.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final String name = mName.getText().toString();
                final String email = mEmail.getText().toString();
                final String password = mPassowrd.getText().toString();
                mAuth.createUserWithEmailAndPassword(email, password).addOnCompleteListener(activity: getApplication(), new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (!task.isSuccessful()) {
                            Toast.makeText(getApplicationContext(), "Sign in ERROR", Toast.LENGTH_SHORT).show();

                        }else{
                            String userId = mAuth.getCurrentUser().getUid();
                            DatabaseRefere currentUSerDb = FirebaseDatabase.getInstace().getRefernce().child("users").child(userId);

                            Map userinfo = new HashMap<>();
                            userInfo.put( k: "email", email);
                            userInfo.put( k: "name", name);
                            userInfo.put( k: "profileImageErl", v: "default");

                            currentUSerDb.updateChilderen(userInfo);

                        }
                    }
                });
            }
        });

    }
    @Override
    protected void  onStart() {
        super.onStart();
        mAuth.addAuthStateListener(firebaseAuthStateListener);


    }
    @Override
    protected void onStop() {
        super.onStop();
        mAuth.removeAuthStateListener(firebaseAuthStateListener);

    }
}