Progress Bar in Android

Progress bars are used to show progress of a task. For example, when you are uploading or downloading something from the internet, it is better to show the progress of download/upload to the user.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <ProgressBar
        android:id="@+id/progressBar1"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="23dp"
        android:layout_marginTop="20dp"
        android:indeterminate="false"
        android:max="100"
        android:minHeight="50dp"
        android:minWidth="200dp"
        android:progress="1" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/progressBar1"
        android:layout_below="@+id/progressBar1"/>

</RelativeLayout>

MainActivity.Java

package com.androidian.progressbar;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.os.Handler;
import android.widget.ProgressBar;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {


        private ProgressBar progressBar;
        private int progressStatus = 0;
        private TextView textView;
        private Handler handler = new Handler();

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            progressBar = (ProgressBar) findViewById(R.id.progressBar1);
            textView = (TextView) findViewById(R.id.textView1);
            // Start long running operation in a background thread
            new Thread(new Runnable() {
                public void run() {
                    while (progressStatus < 100) {
                        progressStatus += 1;
                        // Update the progress bar and display the
                        //current value in the text view
                        handler.post(new Runnable() {
                            public void run() {
                                progressBar.setProgress(progressStatus);
                                textView.setText(progressStatus+"/"+progressBar.getMax());
                            }
                        });
                        try {
                            // Sleep for 200 milliseconds.
                            //Just to display the progress slowly
                            Thread.sleep(200);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }).start();
        }
    }