MainActivity.Java

package com.example.demoapp;

import android.content.Context;
import android.content.Intent;
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.Toast;

import com.example.demoapp.dbhelper.DBHandler;

import java.util.ArrayList;
import java.util.HashMap;

public class MainActivity extends AppCompatActivity {
    Button btnSub;
    Button btnEdit;
    EditText et1,et2,et3,et4;
    String q1,q2,q3,q4;
    DBHandler db;
    SharedPreferences sharedpreferences;
    String student = "student";
    ArrayList<HashMap<String,String>> arrProductAndDeficiencyEdit=new ArrayList<HashMap<String,String>>();


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

        et1 =(EditText)findViewById(R.id.et1);
        et2 =(EditText)findViewById(R.id.et2);
        et3 =(EditText)findViewById(R.id.et3);
        et4 =(EditText)findViewById(R.id.et4);



        btnSub = (Button) findViewById(R.id.btnSub);
        btnEdit = (Button) findViewById(R.id.btnEdit);


        sharedpreferences = getSharedPreferences("checklist-101", Context.MODE_PRIVATE);


        q1 =  sharedpreferences.getString("q1", null);
        q2 =  sharedpreferences.getString("q2", null);
        q3 =  sharedpreferences.getString("q3", null);

        q4 =  sharedpreferences.getString("q4", null);


        q1.setText(qt1);
        q2.setText(qt30);
        q3.setText(qt31);
        q4.setText(qt32);









        btnSub.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {


                et1  = q1.getText().toString();
                et2  = q2.getText().toString();
                et3  = q3.getText().toString();
                et4  = q4.getText().toString();



            SharedPreferences.Editor editor = sharedpreferences.edit();



            editor.putString("q1", q1);
            editor.putString("q2", q2);
            editor.putString("q3", q3);
            editor.putString("q4", q4);

            editor.commit();

                HashMap<String,String> map1= new HashMap<String,String>();


                map1.put("q1", et1+"");
                map1.put("q2", et2+"");
                map1.put("q3", et3+"");
                map1.put("q4", et4+"");


                db.InsertTable(map1, "student");

                //Log.e(qt27,"db insert >"+qt27);


                Intent i = new Intent(MainActivity.this, MainActivity.class);
                startActivity(i);
                Toast.makeText(getApplicationContext(),
                        "All Data Successfully Save ",
                        Toast.LENGTH_LONG).show();

                finish();

            }
        });




    }

}