1) User.java :
Model Class
package com.example.login_registration_demo;
public class User {
private int id;
private String name;
private String email;
private String password;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
2) DatabaseHelper .java
Database Helper class
package com.example.login_registration_demo;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import java.util.ArrayList;
import java.util.List;
public class DatabaseHelper extends SQLiteOpenHelper {
// Database Version
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "UserManager.db";
// User table name
private static final String TABLE_USER = "user";
// User Table Columns names
private static final String COLUMN_USER_ID = "user_id";
private static final String COLUMN_USER_NAME = "user_name";
private static final String COLUMN_USER_EMAIL = "user_email";
private static final String COLUMN_USER_PASSWORD = "user_password";
// create table sql query
private String CREATE_USER_TABLE = "CREATE TABLE " + TABLE_USER + "("
+ COLUMN_USER_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + COLUMN_USER_NAME + " TEXT,"
+ COLUMN_USER_EMAIL + " TEXT," + COLUMN_USER_PASSWORD + " TEXT" + ")";
// drop table sql query
private String DROP_USER_TABLE = "DROP TABLE IF EXISTS " + TABLE_USER;
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(CREATE_USER_TABLE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
//Drop User Table if exist
db.execSQL(DROP_USER_TABLE);
// Create tables again
onCreate(db);
}
public void addUser(User user) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(COLUMN_USER_NAME, user.getName());
values.put(COLUMN_USER_EMAIL, user.getEmail());
values.put(COLUMN_USER_PASSWORD, user.getPassword());
// Inserting Row
db.insert(TABLE_USER, null, values);
db.close();
}
public boolean checkUser(String email) {
// array of columns to fetch
String[] columns = {
COLUMN_USER_ID
};
SQLiteDatabase db = this.getReadableDatabase();
// selection criteria
String selection = COLUMN_USER_EMAIL + " = ?";
// selection argument
String[] selectionArgs = {email};
Cursor cursor = db.query(TABLE_USER, //Table to query
columns, //columns to return
selection, //columns for the WHERE clause
selectionArgs, //The values for the WHERE clause
null, //group the rows
null, //filter by row groups
null); //The sort order
int cursorCount = cursor.getCount();
cursor.close();
db.close();
if (cursorCount > 0) {
return true;
}
return false;
}
public boolean checkUser(String email, String password) {
// array of columns to fetch
String[] columns = {COLUMN_USER_ID};
SQLiteDatabase db = this.getReadableDatabase();
String selection = COLUMN_USER_EMAIL + " = ?" + " AND " + COLUMN_USER_PASSWORD + " = ?";
String[] selectionArgs = {email, password};
Cursor cursor = db.query(TABLE_USER, //Table to query
columns, //columns to return
selection, //columns for the WHERE clause
selectionArgs, //The values for the WHERE clause
null, //group the rows
null, //filter by row groups
null); //The sort order
int cursorCount = cursor.getCount();
cursor.close();
db.close();
if (cursorCount > 0) {
return true;
}
return false;
}
}
4) activity_login.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/nestedScrollView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorBackground"
android:paddingLeft="20dp"
android:paddingTop="20dp"
android:paddingRight="20dp"
android:paddingBottom="20dp">
<androidx.appcompat.widget.LinearLayoutCompat
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/lay_Email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="40dp">
<EditText
android:id="@+id/et_Email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/hint_email"
android:inputType="text"
android:maxLines="1"
android:textColor="@android:color/white" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/lay_Password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp">
<EditText
android:id="@+id/et_Password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/hint_password"
android:inputType="textPassword"
android:maxLines="1"
android:textColor="@android:color/white" />
</com.google.android.material.textfield.TextInputLayout>
<androidx.appcompat.widget.AppCompatButton
android:id="@+id/appCompatButtonLogin"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
android:background="@color/colorTextHint"
android:text="@string/text_login" />
<androidx.appcompat.widget.AppCompatTextView
android:id="@+id/textViewLinkRegister"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:gravity="center"
android:text="@string/text_not_member"
android:textSize="16dp" />
</androidx.appcompat.widget.LinearLayoutCompat>
</androidx.core.widget.NestedScrollView>
5) activity_registration.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/nestedScrollView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorBackground"
android:paddingLeft="20dp"
android:paddingTop="20dp"
android:paddingRight="20dp"
android:paddingBottom="20dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/lay_Name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="40dp">
<EditText
android:id="@+id/et_Name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/hint_name"
android:inputType="text"
android:maxLines="1"
android:textColor="@android:color/white" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/lay_Email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp">
<EditText
android:id="@+id/et_Email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/hint_email"
android:inputType="text"
android:maxLines="1"
android:textColor="@android:color/white" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/lay_Password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp">
<EditText
android:id="@+id/et_Password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/hint_password"
android:inputType="textPassword"
android:maxLines="1"
android:textColor="@android:color/white" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/lay_ConfPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp">
<EditText
android:id="@+id/et_ConfPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/hint_confirm_password"
android:inputType="textPassword"
android:maxLines="1"
android:textColor="@android:color/white" />
</com.google.android.material.textfield.TextInputLayout>
<androidx.appcompat.widget.AppCompatButton
android:id="@+id/appCompatButtonRegister"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
android:background="@color/colorTextHint"
android:text="@string/text_register" />
<androidx.appcompat.widget.AppCompatTextView
android:id="@+id/appCompatTextViewLoginLink"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:gravity="center"
android:text="Already a member? Login"
android:textSize="16dp" />
</LinearLayout>
</androidx.core.widget.NestedScrollView>
6) activity_user_list.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorBackground"
tools:context=".UserListActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@id/textview"
android:layout_centerInParent="true"
android:layout_margin="20dp"
android:text="Successfully login"
android:textColor="@color/colorText"
android:textSize="16dp" />
<TextView
android:id="@+id/textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Email ID"
android:textColor="@color/colorText"
android:textSize="16dp" />
</RelativeLayout>
7) InputValidation .java
package com.example.login_registration_demo;
import android.app.Activity;
import android.content.Context;
import android.view.View;
import android.view.WindowManager;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import com.google.android.material.textfield.TextInputLayout;
public class InputValidation {
private Context context;
InputValidation(Context context) {
this.context = context;
}
boolean isInputEditTextFilled(EditText editText, TextInputLayout textInputLayout, String message) {
String value = editText.getText().toString().trim();
if (value.isEmpty()) {
textInputLayout.setError(message);
hideKeyboardFrom(editText);
return false;
} else {
textInputLayout.setErrorEnabled(false);
}
return true;
}
boolean isInputEditTextEmail(EditText editText, TextInputLayout textInputLayout, String message) {
String value = editText.getText().toString().trim();
if (value.isEmpty() || !android.util.Patterns.EMAIL_ADDRESS.matcher(value).matches()) {
textInputLayout.setError(message);
hideKeyboardFrom(editText);
return false;
} else {
textInputLayout.setErrorEnabled(false);
}
return true;
}
boolean isInputEditTextMatches(EditText editText1, EditText editText2, TextInputLayout textInputLayout, String message) {
String value1 = editText1.getText().toString().trim();
String value2 = editText2.getText().toString().trim();
if (!value1.contentEquals(value2)) {
textInputLayout.setError(message);
hideKeyboardFrom(editText2);
return false;
} else {
textInputLayout.setErrorEnabled(false);
}
return true;
}
private void hideKeyboardFrom(View view) {
InputMethodManager imm = (InputMethodManager) context.getSystemService(Activity.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(view.getWindowToken(), WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
}
}
8) RegistrationActivity.java
package com.example.login_registration_demo;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.AppCompatButton;
import androidx.appcompat.widget.AppCompatTextView;
import androidx.core.widget.NestedScrollView;
import com.google.android.material.snackbar.Snackbar;
import com.google.android.material.textfield.TextInputLayout;
public class RegisterActivity extends AppCompatActivity implements View.OnClickListener {
private final AppCompatActivity activity = RegisterActivity.this;
private NestedScrollView nestedScrollView;
private TextInputLayout lay_Name;
private TextInputLayout lay_Email;
private TextInputLayout lay_Password;
private TextInputLayout lay_ConfPassword;
private EditText et_Name;
private EditText et_Email;
private EditText et_Password;
private EditText et_ConfPassword;
private AppCompatButton appCompatButtonRegister;
private AppCompatTextView appCompatTextViewLoginLink;
private InputValidation inputValidation;
private DatabaseHelper databaseHelper;
private User user;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
getSupportActionBar().hide();
initViews();
initListeners();
initObjects();
}
private void initViews() {
nestedScrollView = findViewById(R.id.nestedScrollView);
lay_Name = findViewById(R.id.lay_Name);
lay_Email = findViewById(R.id.lay_Email);
lay_Password = findViewById(R.id.lay_Password);
lay_ConfPassword = findViewById(R.id.lay_ConfPassword);
et_Name = findViewById(R.id.et_Name);
et_Email = findViewById(R.id.et_Email);
et_Password = findViewById(R.id.et_Password);
et_ConfPassword = findViewById(R.id.et_ConfPassword);
appCompatButtonRegister = findViewById(R.id.appCompatButtonRegister);
appCompatTextViewLoginLink = findViewById(R.id.appCompatTextViewLoginLink);
}
private void initListeners() {
appCompatButtonRegister.setOnClickListener(this);
appCompatTextViewLoginLink.setOnClickListener(this);
}
private void initObjects() {
inputValidation = new InputValidation(activity);
databaseHelper = new DatabaseHelper(activity);
user = new User();
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.appCompatButtonRegister:
postDataToSQLite();
break;
case R.id.appCompatTextViewLoginLink:
finish();
break;
}
}
private void postDataToSQLite() {
if (!inputValidation.isInputEditTextFilled(et_Name, lay_Name, getString(R.string.error_message_name))) {
return;
}
if (!inputValidation.isInputEditTextFilled(et_Email, lay_Email, getString(R.string.error_message_email))) {
return;
}
if (!inputValidation.isInputEditTextEmail(et_Email, lay_Email, getString(R.string.error_message_email))) {
return;
}
if (!inputValidation.isInputEditTextFilled(et_Password, lay_Password, getString(R.string.error_message_password))) {
return;
}
if (!inputValidation.isInputEditTextMatches(et_Password, et_ConfPassword,
lay_ConfPassword, getString(R.string.error_password_match))) {
return;
}
if (!databaseHelper.checkUser(et_Email.getText().toString().trim())) {
user.setName(et_Name.getText().toString().trim());
user.setEmail(et_Email.getText().toString().trim());
user.setPassword(et_Password.getText().toString().trim());
databaseHelper.addUser(user);
// Snack Bar to show success message that record saved successfully
Snackbar.make(nestedScrollView, getString(R.string.success_message), Snackbar.LENGTH_LONG).show();
emptyInputEditText();
} else {
// Snack Bar to show error message that record already exists
Snackbar.make(nestedScrollView, getString(R.string.error_email_exists), Snackbar.LENGTH_LONG).show();
}
}
/**
* This method is to empty all input edit text
*/
private void emptyInputEditText() {
et_Name.setText(null);
et_Email.setText(null);
et_Password.setText(null);
et_ConfPassword.setText(null);
}
}
9) LoginActivity.java
package com.example.login_registration_demo;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.AppCompatButton;
import androidx.appcompat.widget.AppCompatTextView;
import androidx.core.widget.NestedScrollView;
import com.google.android.material.snackbar.Snackbar;
import com.google.android.material.textfield.TextInputLayout;
public class LoginActivity extends AppCompatActivity implements View.OnClickListener {
private final AppCompatActivity activity = LoginActivity.this;
private NestedScrollView nestedScrollView;
private TextInputLayout lay_Email;
private TextInputLayout lay_Password;
private EditText et_Email;
private EditText et_Password;
private AppCompatButton appCompatButtonLogin;
private AppCompatTextView textViewLinkRegister;
private InputValidation inputValidation;
private DatabaseHelper databaseHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
getSupportActionBar().hide();
initViews();
initListeners();
initObjects();
}
private void initViews() {
nestedScrollView = findViewById(R.id.nestedScrollView);
lay_Email = findViewById(R.id.lay_Email);
lay_Password = findViewById(R.id.lay_Password);
et_Email = findViewById(R.id.et_Email);
et_Password = findViewById(R.id.et_Password);
appCompatButtonLogin = findViewById(R.id.appCompatButtonLogin);
textViewLinkRegister = findViewById(R.id.textViewLinkRegister);
}
private void initListeners() {
appCompatButtonLogin.setOnClickListener(this);
textViewLinkRegister.setOnClickListener(this);
}
private void initObjects() {
databaseHelper = new DatabaseHelper(activity);
inputValidation = new InputValidation(activity);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.appCompatButtonLogin:
verifyFromSQLite();
break;
case R.id.textViewLinkRegister:
Intent intentRegister = new Intent(getApplicationContext(), RegisterActivity.class);
startActivity(intentRegister);
break;
}
}
private void verifyFromSQLite() {
if (!inputValidation.isInputEditTextFilled(et_Email, lay_Email, getString(R.string.error_message_email))) {
return;
}
if (!inputValidation.isInputEditTextEmail(et_Email, lay_Email, getString(R.string.error_message_email))) {
return;
}
if (!inputValidation.isInputEditTextFilled(et_Password, lay_Password, getString(R.string.error_message_email))) {
return;
}
if (databaseHelper.checkUser(et_Email.getText().toString().trim()
, et_Password.getText().toString().trim())) {
Intent accountsIntent = new Intent(activity, UserListActivity.class);
accountsIntent.putExtra("EMAIL", et_Email.getText().toString().trim());
emptyInputEditText();
startActivity(accountsIntent);
} else {
// Snack Bar to show success message that record is wrong
Snackbar.make(nestedScrollView, getString(R.string.error_valid_email_password), Snackbar.LENGTH_LONG).show();
}
}
private void emptyInputEditText() {
et_Email.setText(null);
et_Password.setText(null);
}
}
10) UserListctivity.java
package com.example.login_registration_demo;
import android.os.Bundle;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
public class UserListActivity extends AppCompatActivity {
TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_list);
textView = findViewById(R.id.textview);
String emailfromIntent = getIntent().getStringExtra("EMAIL");
textView.setText(emailfromIntent);
}
}
11) color.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="colorPrimary">#51d8c7</color>
<color name="colorPrimaryDark">#51d8c7</color>
<color name="colorAccent">#FFFFFF</color>
<color name="colorBackground">#413e4f</color>
<color name="colorText">#FFFFFF</color>
<color name="colorTextHint">#51d8c7</color>
</resources>
12) String.xml
<resources>
<string name="app_name">Login Register Kotlin</string>
<string name="text_accounts">All Accounts</string>
<string name="hint_name">Name</string>
<string name="hint_email">Email</string>
<string name="hint_password">Password</string>
<string name="hint_confirm_password">Confirm Password</string>
<string name="text_login">Login</string>
<string name="text_register">Register</string>
<string name="error_message_name">Enter Full Name</string>
<string name="error_message_email">Enter Valid Email</string>
<string name="error_message_age">Enter Age</string>
<string name="error_message_password">Enter Password</string>
<string name="success_message">Registration Successful</string>
<string name="text_not_member">No account yet? Create one</string>
<string name="text_already_member">Already a member? Login</string>
<string name="error_email_exists">Email Already Exists</string>
<string name="error_password_match">Password Does Not Matches</string>
<string name="error_valid_email_password">Wrong Email or Password</string>
<string name="action_settings">Settings</string>
<string name="text_hello">Hello,</string>
<string name="text_title">Android Tutorials Hub</string>
</resources>
Pls, post the android Manifest.
ReplyDeletewhen i click on login button my app crash, can some one help me pls?
ReplyDeleteDoes the code work properly ??
ReplyDelete