public static final String USER_TABLE = "users";
public static final String COLUMN_ID = "_id";
public static final String COLUMN_EMAIL = "email";
public static final String COLUMN_PASS = "password";

public static final String CREATE_TABLE_USERS = "CREATE TABLE " + USER_TABLE + "("
        + COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT,"
        + COLUMN_EMAIL + " TEXT,"
        + COLUMN_PASS + " TEXT);";

public DbHelper(Context context) {
    super(context, DB_NAME, null, DB_VERSION);
}

@Override
public void onCreate(SQLiteDatabase db) {
    db.execSQL(CREATE_TABLE_USERS);
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    db.execSQL("DROP TABLE IF EXISTS " + USER_TABLE);
    onCreate(db);
}

/**
 * Storing user details in database
 * */
public void addUser(String email, String password) {
    SQLiteDatabase db = this.getWritableDatabase();

    ContentValues values = new ContentValues();
    values.put(COLUMN_EMAIL, email);
    values.put(COLUMN_PASS, password);

    long id = db.insert(USER_TABLE, null, values);
    db.close();

    Log.d(TAG, "user inserted" + id);
}

public boolean getUser(String email, String pass){
    //HashMap<String, String> user = new HashMap<String, String>();
    String selectQuery = "select * from  " + USER_TABLE + " where " +
            COLUMN_EMAIL + " = " + "'"+email+"'" + " and " + COLUMN_PASS + " = " + "'"+pass+"'";

    SQLiteDatabase db = this.getReadableDatabase();
    Cursor cursor = db.rawQuery(selectQuery, null);
    // Move to first row
    cursor.moveToFirst();
    if (cursor.getCount() > 0) {

        return true;
    }
    cursor.close();
    db.close();

    return false;
}