Notify Android Java

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity
{
 Button notify;
 EditText e;
 @Override
 protected void onCreate(Bundle savedInstanceState)
 {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 notify= (Button) findViewById(R.id.button);
 e= (EditText) findViewById(R.id.editText);
 notify.setOnClickListener(new View.OnClickListener()
{
 @Override
 public void onClick(View v)
 {
 Intent intent = new Intent(MainActivity.this, SecondActivity.class);
 PendingIntent pending = PendingIntent.getActivity(MainActivity.this, 0, intent,
0);
 Notification noti = new
Notification.Builder(MainActivity.this).setContentTitle("New
Message").setContentText(e.getText().toString())
.setSmallIcon(R.mipmap.ic_launcher).setContentIntent(pending).build();
 NotificationManager manager = (NotificationManager)
getSystemService(NOTIFICATION_SERVICE);
 noti.flags |= Notification.FLAG_AUTO_CANCEL;
 manager.notify(0, noti);
 }
 });
 }
}