SignUp.java

package com.example.app_login;

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

public class SignUp extends AppCompatActivity {

    private TextView button;

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

      /*  button = (TextView) findViewById(R.id.SignUp_btn);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                openNextActivity();
            }
        });*/
    }
    public void openNextActivity(){
        Intent intent = new Intent(this, MainActivity.class);
        startActivity(intent);
    }
}