Register

package com.example.petrus.loginregister;

import android.database.Cursor;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class RegisterActivity extends AppCompatActivity {

    DataHelper dbHelper;
    Button btnA;
    EditText editA;
    EditText editB;
    EditText editC;
    View view1;
    TextView txtA;
    TextView txtB;
    TextView txtC;
    String username;
    String password;
    String confir_pass;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.register);
        dbHelper = new DataHelper(this);
       btnA = findViewById(R.id.btn_register);
       editA = findViewById(R.id.txt_username);
       editB = findViewById(R.id.txt_password);
       editC = findViewById(R.id.txt_confirm_password);
       view1 = findViewById(R.id.View1);
       txtA = findViewById(R.id.txtView);
       txtB = findViewById(R.id.txtView1);
       txtC = findViewById(R.id.txtView2);

       btnA.setOnClickListener(new View.OnClickListener() {
           @Override
           public void onClick(View view) {
               username = editA.getText().toString();
               password = editB.getText().toString();
               confir_pass = editC.getText().toString();
               if (!username.trim().isEmpty() && !password.trim().isEmpty() && !confir_pass.trim().isEmpty()) {
                   if (password.equals(confir_pass)) {
                       SQLiteDatabase db = dbHelper.getWritableDatabase();
                       db.execSQL("insert into daftar(username , password) values('"+
                               editA.getText().toString()+"','"+
                               editB.getText().toString()+"')");
                       Intent x = new Intent(getApplication(), LoginActivity.class);
                       x.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
                       startActivity(x);
                       finish();
                   } else {
                       Toast.makeText(getApplicationContext(), "Password tidak Sama", Toast.LENGTH_LONG).show();
                   }
               } else {
                   Toast.makeText(getApplicationContext(), "Tidak boleh kosong", Toast.LENGTH_LONG).show();
               }
                   }
               });

           }
       }