ProgressBar Example in Android

ProgressBarActivity.xml

   <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:tools="http://schemas.android.com/tools"
              android:id="@+id/activity_progress_bar"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:paddingBottom="@dimen/activity_vertical_margin"
              android:paddingLeft="@dimen/activity_horizontal_margin"
              android:paddingRight="@dimen/activity_horizontal_margin"
              android:paddingTop="@dimen/activity_vertical_margin"
              android:orientation="vertical"
              tools:context="com.bhaumik.programmingstudy.ProgressBarActivity">

    <ProgressBar
            android:id="@+id/progress"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            style="@style/Widget.AppCompat.ProgressBar.Horizontal"/>

    <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Click Progress"
            android:textAllCaps="false"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="50dp"
            android:textSize="16dp"
            android:id="@+id/btn_progress"/>
</LinearLayout>

ProgressBarActivity.java

package com.bhaumik.programmingstudy;

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

public class ProgressBarActivity extends AppCompatActivity {

    ProgressBar progressBar;
    Thread thread;
    Button btn;

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

        progressBar = (ProgressBar) findViewById(R.id.progress);
        btn = (Button) findViewById(R.id.btn_progress);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                thread = new Thread(){

                    @Override
                    public void run() {
                        super.run();
                        for (int i=0;i<=100;)
                        {
                            try {
                                sleep(500);
                            } catch (InterruptedException e) {
                                e.printStackTrace();
                            }
                            progressBar.setProgress(i);
                            i=i+10;
                        }

                    }
                };
                thread.start();
            }
        });
    }
}