Activity1 targil2

package com.example.stas.targil2;



import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.Button ;


public class Activity1 extends AppCompatActivity {


    private  EditText enterText;
    private TextView print;
    public static String SELECTED_ITEM;
    private Button Back ;
    private Button Next ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_1);

        enterText= findViewById(R.id.userName1);
        print = findViewById(R.id.print1);

        if (SELECTED_ITEM != null) {
            print.setText(SELECTED_ITEM);
        }

        //--

        Next= findViewById(R.id.button1);
        Back = findViewById(R.id.button2);

        View.OnClickListener onClicker = new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                // doing something
                switch(v.getId()){
                    case R.id.button2 :goBeck(v);
                        break;
                    case R.id.button1 :goNext(v);
                        break;
                }

            }

        } ;//

        Back.setOnClickListener(onClicker);
        Next.setOnClickListener(onClicker);

        //--

    }



    public void goNext(View v) {

        Activity2.SELECTED_ITEM =enterText.getText().toString();
        Intent intent = new Intent(this,Activity2.class);
        startActivity(intent);
        finish();

    }


    public void goBeck(View v) {

         Main.SELECTED_ITEM =enterText.getText().toString();
        Intent intent = new Intent(this, Main.class);
        startActivity(intent);
        finish();

    }





}