Tost in Android

Tost in Android 

package com.example.viraj.tosthe;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
private Button b1;
    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        b1=(Button)findViewById(R.id.id_button);
        b1.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View view) {
                Toast.makeText(getApplicationContext(),"its working",Toast.LENGTH_LONG).show();
            }
        });
    }
}