Membuat Aplikasi Chatting Part 3 - Menyimpan Data Pengguna di Firestore

activity_login.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 
	xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".LoginActivity">

    <com.google.android.material.textfield.TextInputLayout
        android:id="@+id/tilPassword"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/edtPassword"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Password"
            android:inputType="textPassword" />
    </com.google.android.material.textfield.TextInputLayout>

    <com.google.android.material.textfield.TextInputLayout
        android:id="@+id/tilEmail"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        app:layout_constraintBottom_toTopOf="@+id/tilPassword"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/edtEmail"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Email"
            android:inputType="textEmailAddress" />
    </com.google.android.material.textfield.TextInputLayout>

    <Button
        android:id="@+id/btnLogin"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:background="@color/colorAccent"
        android:text="Login"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/tilPassword" />

    <Button
        android:id="@+id/btnRegister"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:background="@color/colorPrimaryDark"
        android:text="Register"
        android:textColor="@android:color/white"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/btnLogin" />
</androidx.constraintlayout.widget.ConstraintLayout>

activity_register.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".RegisterActivity">

    <com.google.android.material.textfield.TextInputLayout
        android:id="@+id/tilEmail"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="16dp"
        android:layout_marginEnd="8dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/edtEmail"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Email"
            android:inputType="textEmailAddress" />
    </com.google.android.material.textfield.TextInputLayout>

    <com.google.android.material.textfield.TextInputLayout
        android:id="@+id/tilPassword"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/tilEmail">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/edtPassword"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Password"
            android:inputType="textPassword" />
    </com.google.android.material.textfield.TextInputLayout>

    <com.google.android.material.textfield.TextInputLayout
        android:id="@+id/tilName"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/tilPassword">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/edtName"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Name"
            android:inputType="textPersonName" />
    </com.google.android.material.textfield.TextInputLayout>

    <Button
        android:id="@+id/btnRegister"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:background="@color/colorAccent"
        android:text="Register"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

activity_profile.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ProfileActivity">

    <TextView
        android:id="@+id/txtName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Name"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/txtId"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:text="ID"
        app:layout_constraintEnd_toEndOf="@+id/txtName"
        app:layout_constraintStart_toStartOf="@+id/txtName"
        app:layout_constraintTop_toBottomOf="@+id/txtName" />
</androidx.constraintlayout.widget.ConstraintLayout>

menu_main.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/action_logout"
        android:title="Logout"
        app:showAsAction="never"/>
 	<item
        android:id="@+id/action_profile"
        android:icon="@drawable/ic_baseline_account_circle_24"
        android:title="Profile"
        app:showAsAction="always" />
</menu>

RegisterActivity.java

public class RegisterActivity extends AppCompatActivity {

    private EditText edtEmail, edtPassword, edtName;
    private Button btnRegister;
    private FirebaseAuth mAuth;
    private FirebaseFirestore db;

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

        edtEmail = findViewById(R.id.edtEmail);
        edtPassword = findViewById(R.id.edtPassword);
        edtName = findViewById(R.id.edtName);
        btnRegister = findViewById(R.id.btnRegister);

        mAuth = FirebaseAuth.getInstance();
        db = FirebaseFirestore.getInstance();

        btnRegister.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String email = edtEmail.getText().toString().trim();
                String password = edtPassword.getText().toString().trim();
                final String name = edtName.getText().toString().trim();

                if (TextUtils.isEmpty(email)) {
                    edtEmail.setText("can't empty");
                } else if (TextUtils.isEmpty(password)) {
                    edtPassword.setText("can't empty");
                } else if (TextUtils.isEmpty(name)) {
                    edtName.setText("can't empty");
                } else {
                    mAuth.createUserWithEmailAndPassword(email,password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task) {
                            if (task.isSuccessful()) {
                                FirebaseUser currentUser = mAuth.getCurrentUser();
                                final String uid = currentUser.getUid();

                                HashMap<String,Object> dataUser = new HashMap<>();
                                dataUser.put("name",name);
                                dataUser.put("id",getRandomString(6));

                                db.collection("user").document(uid).set(dataUser).addOnCompleteListener(new OnCompleteListener<Void>() {
                                    @Override
                                    public void onComplete(@NonNull Task<Void> task) {
                                        Intent i = new Intent(RegisterActivity.this,MainActivity.class);
                                        i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
                                        startActivity(i);
                                        finish();
                                    }
                                });


                            } else {
                                Toast.makeText(RegisterActivity.this, "Register Failed", Toast.LENGTH_SHORT).show();
                            }
                        }
                    });
                }
            }
        });
    }

    private String getRandomString(int i) {
        String characters = "abcdefghijklmnopqrstuvwxyz1234567890";
        StringBuilder result = new StringBuilder();
        while(i>0) {
            Random rand = new Random();
            result.append(characters.charAt(rand.nextInt(characters.length())));
            i--;
        }
        return  result.toString();
    }
}

LoginActivity.java

public class LoginActivity extends AppCompatActivity {

    private EditText edtEmail, edtPassword;
    private Button btnLogin,btnRegister;
    private FirebaseAuth mAuth;

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

        edtEmail = findViewById(R.id.edtEmail);
        edtPassword = findViewById(R.id.edtPassword);
        btnLogin = findViewById(R.id.btnLogin);
        btnRegister = findViewById(R.id.btnRegister);

        mAuth = FirebaseAuth.getInstance();

        btnRegister.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent i = new Intent(LoginActivity.this,RegisterActivity.class);
                startActivity(i);
                finish();
            }
        });

        btnLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String email = edtEmail.getText().toString().trim();
                String password = edtPassword.getText().toString().trim();

                if (TextUtils.isEmpty(email)) {
                    edtEmail.setText("can't empty");
                } else if (TextUtils.isEmpty(password)) {
                    edtPassword.setText("can't empty");
                } else {
                    mAuth.signInWithEmailAndPassword(email,password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task) {
                            if (task.isSuccessful()) {
                                Intent i = new Intent(LoginActivity.this,MainActivity.class);
                                i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
                                startActivity(i);
                                finish();
                            } else {
                                Toast.makeText(LoginActivity.this, "Authentication Failed", Toast.LENGTH_SHORT).show();
                            }
                        }
                    });
                }
            }
        });
    }
}

MainActivity.java

public class MainActivity extends AppCompatActivity {

    private FirebaseAuth mAuth;
    private FirebaseAuth.AuthStateListener mAuthListener;

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

        mAuth = FirebaseAuth.getInstance();

        mAuthListener = new FirebaseAuth.AuthStateListener() {
            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                if (firebaseAuth.getCurrentUser() == null) {
                    Intent i = new Intent(MainActivity.this,LoginActivity.class);
                    i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
                    startActivity(i);
                    finish();
                } else {

                }
            }
        };
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
        int id = item.getItemId();

        if (id == R.id.action_logout) {
            FirebaseAuth.getInstance().signOut();
            Intent i = new Intent(MainActivity.this,LoginActivity.class);
            i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivity(i);
            finish();
        }
        return super.onOptionsItemSelected(item);
    }

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

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

ProfileActivity.java

public class ProfileActivity extends AppCompatActivity {

    private TextView txtName, txtId;
    private FirebaseAuth mAuth;
    private FirebaseFirestore db;

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

        txtName = findViewById(R.id.txtName);
        txtId = findViewById(R.id.txtId);

        mAuth = FirebaseAuth.getInstance();
        db = FirebaseFirestore.getInstance();
        FirebaseUser currentUser = mAuth.getCurrentUser();
        final String uid = currentUser.getUid();
        
        db.collection("user").document(uid).get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
            @Override
            public void onComplete(@NonNull Task<DocumentSnapshot> task) {
                if (task.isSuccessful()) {
                    DocumentSnapshot document = task.getResult();
                    if (document.exists()) {
                        String name = document.get("name",String.class);
                        String id = document.get("id",String.class);

                        txtName.setText(name);
                        txtId.setText(id);
                    }
                }
            }
        });

    }
}

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