btnSignin.setOnClickListener(new View.OnClickListener(){

        @Override
        public void onClick(View v) {

            dbhelper = new DatabaseHelper(MainActivity.this);
            dbhelper = dbhelper.open();

            String emailId = edtEmailid.getText().toString();
            String Password = edtPassword.getText().toString();

            String StoredPass = dbhelper.getSinlgeEntry(emailId);
            //Log.d("MSG",StoredPass);
            String name = dbhelper.getSinlgeEntryName(emailId);

            if (Password.equals(StoredPass)) {

                sharedPrefs = getApplicationContext().getSharedPreferences(
                        PRIVATE_PREF, Context.MODE_PRIVATE);
                editor = sharedPrefs.edit();
                editor.putString("Uname", edtEmailid.getText().toString());
                // editor.putString("Name", name);
                editor.commit();
                Toast.makeText(getApplication(), "Sign In Successfully",  Toast.LENGTH_SHORT).show();
                Log.d("Email", name);
                Log.d("Email", Password);

            } else {
Toast.makeText(MainActivity.this, "Email Id or Password does not match", Toast.LENGTH_SHORT).show(); }

public class DatabaseHelper extends SQLiteOpenHelper{

private static final String DATABASE_NAME = "Register.db";

private  static final int DATABASE_VERSION = 1;
public static final int NAME_COLUMN = 1;
SQLiteDatabase db;

public DatabaseHelper(Context context) {
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase _db) {
    _db.execSQL( "create table LOGIN " +
"(id integer primary key, USERNAME text,EMAILID text,PASSWORD text)" );

}

@Override
public void onUpgrade(SQLiteDatabase _db, int oldVersion, int newVersion) {

    _db.execSQL("DROP TABLE IF EXIST LOGIN");
    onCreate(_db);
}

public DatabaseHelper open()  {
    db = this.getWritableDatabase();
    return this;
}

public void close() {
    db.close();
}

public SQLiteDatabase getDatabaseInstance() {
    return db;
}

public void insertEntry(String UserName,String emailId,String Password){

   SQLiteDatabase  db = this.getWritableDatabase();

    ContentValues values = new ContentValues();
    values.put("USERNAME",UserName);
    values.put("EMAILID",emailId);
    values.put("PASSWORD",Password);

    db.insert("LOGIN",null,values);
    db.close();

}
public String getSinlgeEntry(String emailId) {

   // SQLiteDatabase db = this.getReadableDatabase();

    Cursor cursor = db.query("LOGIN",null, "USERNAME=?",new String[]{emailId},null,null,null);

    if (cursor.getCount() < 1) // UserName Not Exist
    {
        cursor.close();
        return "NOT EXIST";
    }
    cursor.moveToFirst();
    String Password = cursor.getString(cursor.getColumnIndex("PASSWORD"));
    cursor.close();
    return Password;
}

public  String getSinlgeEntryName(String emailId) {
   Cursor c = db.query("LOGIN",null, "USERNAME=?",new String[]    {emailId},null,null,null);

    if (c.getCount() < 1) // UserName Not Exist
    {
        c.close();
      return "NOT EXIST";
    }
    c.moveToFirst();
    String UserName = c.getString(c.getColumnIndex("USERNAME"));
    c.close();
    return UserName;
}