progress dialog android code

package com.example.saigopinarimeti.helloworld;

import android.app.ProgressDialog;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    String TAG = "MainActivity";

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

        progressDialog = new ProgressDialog(this);

        progressDialog.setTitle("Data is loading .. title");
        progressDialog.setMessage("please wait .... message");
        progressDialog.setIcon(R.drawable.ic_launcher_foreground);
        progressDialog.setCanceledOnTouchOutside(false);


        findViewById(R.id.showProgress).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                progressDialog.show();
            }
        });

        findViewById(R.id.stopProgress).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                    progressDialog.dismiss();
            }
        });


    }


}