Saturday, March 21, 2020

Bluetooth Tutorial - Android Studio

1. AndroidManifest.xml



<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.bluthoothexample">

    <uses-permission android:name="android.permission.BLUETOOTH"/>
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>


2. activity_main.xml


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:gravity="center_horizontal"
    android:orientation="vertical"
    tools:context=".MainActivity">
    <!--Display wheatere bluetooth is available or not-->
    <TextView
        android:id="@+id/statusBluetoothTv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text=""
        android:textAlignment="center"
        android:textColor="#000"
        android:textSize="25dp"
        tools:ignore="RtlCompat" />

    <!--Bluetooth icon (on/off)-->
    <ImageView
        android:id="@+id/bluetoothIv"
        android:layout_width="100dp"
        android:layout_height="100dp" />

    <!--On Button-->
    <Button
        android:id="@+id/onButn"
        style="@style/Widget.AppCompat.Button.Colored"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:minWidth="200dp"
        android:text="Turn On" />

    <!--Off Button-->
    <Button
        android:id="@+id/offButn"
        style="@style/Widget.AppCompat.Button.Colored"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:minWidth="200dp"
        android:text="Turn Off" />

    <Button
        android:id="@+id/discoverableBtn"
        style="@style/Widget.AppCompat.Button.Colored"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:minWidth="200dp"
        android:text="Discoverable" />

    <!--Get list of paired device button-->
    <Button
        android:id="@+id/PairedBtn"
        style="@style/Widget.AppCompat.Button.Colored"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:minWidth="200dp"
        android:text="Get Paired Device" />

    <!--Show Paired Device here-->
    <TextView
        android:id="@+id/pairTv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:minWidth="200dp"
        android:text=""
        android:textColor="#000" />
</LinearLayout>


3.MainActivity.java


package com.example.bluthoothexample;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

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

import java.util.Set;

public class MainActivity extends AppCompatActivity {

    private static final int REQUEST_ENABLE_BT = 0;
    private static final int REQUEST_DISCOVER_BT = 1;

    private TextView mStatusBleTv, mPairedTv;
    ImageView mBlueIV;
    Button mOnBtn, mOffBtn, mDiscoverBtn, mPairedBtn;
    BluetoothAdapter bluetoothAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mStatusBleTv = findViewById(R.id.statusBluetoothTv);
        mPairedTv = findViewById(R.id.pairTv);
        mBlueIV = findViewById(R.id.bluetoothIv);
        mOnBtn = findViewById(R.id.onButn);
        mOffBtn = findViewById(R.id.offButn);
        mDiscoverBtn = findViewById(R.id.discoverableBtn);
        mPairedBtn = findViewById(R.id.PairedBtn);

        bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

        if (bluetoothAdapter == null) {
            mStatusBleTv.setText("Bluetooth is not available");
        } else {
            mStatusBleTv.setText("Bluetooth is  available");


            if (bluetoothAdapter.isEnabled()) {
                mBlueIV.setImageResource(R.drawable.bluetooth_on);
            } else {
                mBlueIV.setImageResource(R.drawable.bluetooth_off);

            }

            mOnBtn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (!bluetoothAdapter.isEnabled()) {
                        showToast("Turning on Bluetooth..");
                        Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                        startActivityForResult(intent, REQUEST_ENABLE_BT);
                    } else {
                        showToast("Bluetooth is already on");

                    }
                }
            });

            mDiscoverBtn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (!bluetoothAdapter.isDiscovering()) {
                        showToast("Making Your Device Discoverable");
                        Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
                        startActivityForResult(intent, REQUEST_DISCOVER_BT);
                    }
                }
            });
            mOffBtn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (bluetoothAdapter.isEnabled()) {
                        bluetoothAdapter.disable();
                        showToast("Turning  Bluetooth off");
                        mBlueIV.setImageResource(R.drawable.bluetooth_off);
                    } else {
                        showToast("Bluetooth is already off");

                    }
                }
            });

            mPairedBtn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (bluetoothAdapter.isEnabled()) {
                        mPairedTv.setText("Paired Devices");
                        Set<BluetoothDevice> devices = bluetoothAdapter.getBondedDevices();

                        for (BluetoothDevice device : devices) {
                            mPairedTv.append("\n Device : " + device.getName() + " , " + device);
                        }
                    } else {
                        showToast("Turn On bluetooth to get paired devices");
                    }
                }
            });
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {

        switch (requestCode) {
            case REQUEST_ENABLE_BT:
                if (resultCode == RESULT_OK) {
                    mBlueIV.setImageResource(R.drawable.bluetooth_on);
                    showToast("Bluetooth is On");
                } else {
                    showToast("Bluetooth is Off");

                }
                break;
        }
        super.onActivityResult(requestCode, resultCode, data);

    }

    private void showToast(String msg) {
        Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_SHORT).show();
    }
}

on 5 comments:

Monday, March 16, 2020

Login Registration with SQlite Database in Android

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>

on 3 comments:

Thursday, March 12, 2020

How To Multiple Permissions In Android Studio


1) AndroidMenifest.xml

<?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" 
 package="com.example.multiplepermissiontest">     
 <uses-permission android:name="android.permission.CAMERA"/> 
 <uses-permission android:name="android.permission.READ_CONTACTS"/> 
 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> 
 <application 
      android:allowBackup="true"  
      android:icon="@mipmap/ic_launcher" 
      android:label="@string/app_name" 
      android:roundIcon="@mipmap/ic_launcher_round" 
      android:supportsRtl="true" 
      android:theme="@style/AppTheme"> 
 <activity android:name=".MainActivity"> 
 <intent-filter> 
 <action android:name="android.intent.action.MAIN" /> 
 <category android:name="android.intent.category.LAUNCHER" /> 
 </intent-filter> 
 </activity> 
 </application>
</manifest>

2). activity_main.xml

Layout xml file 

 
<?xml version="1.0" encoding="utf-8"?>
 <LinearLayout 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:gravity="center"
     android:orientation="horizontal" 
     android:padding="10dp"
     tools:context=".MainActivity">
    <Button 
         android:id="@+id/btn_request" 
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Request Permission"
         android:layout_weight="1"/> 
    <Button         
         android:id="@+id/btn_check"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content" 
         android:text="Check Permission" 
         android:layout_weight="1"/> 
</LinearLayout>

3). MainActivity.java

 In this class we have implement CHECK and REQUEST an CAMERA, READ_CONTACT and READ_EXTERNAL_STORAGE

 

package com.example.multiplepermissiontest;
import android.app.AlertDialog; 
import android.content.DialogInterface;
import android.content.Intent; 
import android.net.Uri; 
import android.os.Bundle;
import android.provider.Settings;
import android.view.View;
import android.widget.Button; 
import android.widget.Toast;
import androidx.annotation.NonNull; 
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
public class MainActivity extends AppCompatActivity {

    static final int REQUEST_CODE = 123;  
// value must you choose any value 123, 100, 111 etc 
 Button btn_request; 
 Button btn_check;
    @Override 
 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState); 
       setContentView(R.layout.activity_main);
        btn_request = findViewById(R.id.btn_request); 
        btn_check = findViewById(R.id.btn_check);
        btn_request.setOnClickListener(new View.OnClickListener() {
       @Override 
       public void onClick(View v) {
                if (ContextCompat.checkSelfPermission(MainActivity.this, "android.permission.CAMERA") +
                        ContextCompat.checkSelfPermission(MainActivity.this, "android.permission.READ_CONTACTS") +
                        ContextCompat.checkSelfPermission(MainActivity.this, "android.permission.READ_EXTERNAL_STORAGE") == 0) {
                    Toast.makeText(MainActivity.this, "Permission already granted..", Toast.LENGTH_SHORT).show(); 
 } else if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, "android.permission.CAMERA") ||
                        ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, "android.permission.READ_CONTACTS") ||
                        ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, "android.permission.READ_EXTERNAL_STORAGE")) 
{
                     
 final AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this); 
 builder.setTitle("Grant those Permission"); 
 builder.setMessage("Camera, Read Contact and Read Storage"); 
 builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
 @Override 
 public void onClick(DialogInterface dialog, int which) {
 ActivityCompat.requestPermissions(MainActivity.this,
 new String[]{"android.permission.CAMERA", "android.permission.READ_CONTACTS",
 "android.permission.READ_EXTERNAL_STORAGE"}, MainActivity.REQUEST_CODE); 
 }
 }); 
 builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                        @Override 
                       public void onClick(DialogInterface dialog, int which) {
                            // no code 
                     }
                    });
                     builder.create().show(); 
  } else {
                    ActivityCompat.requestPermissions(MainActivity.this,
                    new String[]{"android.permission.CAMERA", "android.permission.READ_CONTACTS",
 "android.permission.READ_EXTERNAL_STORAGE"}, MainActivity.REQUEST_CODE);                }
            }
        });        btn_check.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View v) {

                Intent intent = new Intent();
                intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS); 
 intent.setData(Uri.fromParts("package", MainActivity.this.getPackageName(), null)); 
                startActivity(intent); 
 }
        }); 
     }

    @Override 
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults); 
 if (requestCode != REQUEST_CODE) {
            return; 
 }
        // if permissions more then 3 then increment upto permissions 
        if (grantResults.length <= 0 || grantResults[0] + grantResults[1] + grantResults[2] != 0)
       {
       Toast.makeText(MainActivity.this, "Permissions Denied..", Toast.LENGTH_SHORT).show(); 
 } else {
            Toast.makeText(MainActivity.this, "Permissions Granted..", Toast.LENGTH_SHORT).show(); 
 }
    }
}
on 1 comment:
Subscribe to: Comments (Atom)