MainActivitySharedPreferences

package com.rohim.otrust.appsharedpref;

import android.content.Context;
import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private EditText textName, textPhone, textEmail;
    private TextView textOut;
    private Button saveBtn;

    public static final String MyPREFERENCES = "MyPrefs" ;
    public static final String Name = "nameKey";
    public static final String Phone = "phoneKey";
    public static final String Email = "emailKey";

    SharedPreferences sharedPreferences;

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

        textName    = (EditText) findViewById(R.id.et_name);
        textPhone   = (EditText) findViewById(R.id.et_phonet);
        textEmail   = (EditText) findViewById(R.id.et_emailt);
        saveBtn     = (Button)   findViewById(R.id.btn_save);
        textOut     = (TextView) findViewById(R.id.tv_output);

        sharedPreferences   = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);

        saveBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String show     = "";

                String strName  = textName.getText().toString();
                String strPhone = textPhone.getText().toString();
                String strEmail = textEmail.getText().toString();

                SharedPreferences.Editor editor = sharedPreferences.edit();

                editor.putString(Name, strName);
                editor.putString(Phone, strPhone);
                editor.putString(Email, strEmail);

                show    = "Your Data : \n";
                show    += strName + "\n" + strPhone + "\n" + strEmail;

                Toast.makeText(MainActivity.this, "Successfully Saved", Toast.LENGTH_LONG).show();
                textOut.setText(show);

            }
        });
    }
}