MainActivity.java

package com.example.venkat.and;

import android.app.Dialog;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Parcelable;
import android.support.annotation.NonNull;
import android.support.design.widget.NavigationView;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.TaskStackBuilder;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RatingBar;
import android.widget.RemoteViews;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener  {


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

//
//        NotificationCompat.Builder builder=new NotificationCompat.Builder(MainActivity.this);
//        builder.setContentTitle("welcome");
//        builder.setContentText("safcsaf");
//        Intent i=new Intent(this,not.class);
//        TaskStackBuilder stackBuilder=TaskStackBuilder.create(this);
//        stackBuilder.addParentStack(not.class);
//        stackBuilder.addNextIntent(i);
//        PendingIntent pendingIntent=stackBuilder.getPendingIntent(001,PendingIntent.FLAG_UPDATE_CURRENT);
//        builder.setContentIntent(pendingIntent);
//        NotificationManager nm=(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
//        nm.notify(001,builder.build());


        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar2);
        setSupportActionBar(toolbar);

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle( this, drawer, toolbar, R.string.open, R.string.close);
        drawer.setDrawerListener(toggle);
        toggle.syncState();
        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);

    }
    public void clk(View view)
    {
        Intent i=new Intent(this,Generate.class);
        startActivity(i);
    }
    public void Samp(View view)
    {