MainActivity.java

package com.example.programmingknowledge.mysqldemo;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

    EditText UsernameEt, PasswordEt;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        UsernameEt = (EditText) findViewById(R.id.etUserName);
        PasswordEt = (EditText) findViewById(R.id.etPassword);
    }


    public void OnLogin(View view) {
        String username = UsernameEt.getText().toString();
        String password = PasswordEt.getText().toString();
        String type = "login";

        BackgroundWorker backgroundWorker = new BackgroundWorker(this);
        backgroundWorker.execute(type, username, password);
    }

    public void OpenReg(View view) {
        startActivity(new Intent(this,Register.class));
    }

}