ProgressBar in Android

Introduction

This article explains how to use a Progress Bar.

Progress Bar

A Progress Bar is a graphical user interface that shows the progress of a task. Initially, the Progress Bar does not show the progress in the form of a percentage. But now a Progress Bar shows progress in the form of a percentage. There are two types of Progress Bars.

ProgressDialogue Style Spinner

ProgressDialogue Style Horizontal

ProgressDialogue Style_Spinner

ProgressDialogue Style_Horizontal

In this, you will use a button to start the progress bar in a click event. Inside the click event you will write this:

progress = new ProgressDialog(v.getContext());
progress.setMessage("Show Progress ...");
progress.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progress.setProgress(0);
progress.setMax(100);
progress.show();
progressStatus = 0;
fileSize = 0;
new Thread(new Runnable()
{
public void run() {
while (progressStatus < 100) {
progressStatus = doSomeTasks();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
progressBarHandler.post(new Runnable() {
public void run() {
progress.setProgress(progressStatus);
}
});
}
if (progressStatus >= 100) {
try {
Thread.sleep(2000);
} catch (InterruptedException e)
{
e.printStackTrace();
}
progress.dismiss();
}
}
}).start();

Step 1

Create an XML file and write this:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="@+id/btnStartProgress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="StartProgress" />
</LinearLayout>

Step 2

Create a Java file and write this:

package com.progress;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.os.Handler;
import android.widget.Button;
import android.view.View;
import android.view.View.OnClickListener;
public class MainActivity extends Activity {
Button btnshowprogress;
ProgressDialog progress;
private int progressStatus = 0;
private Handler progressBarHandler = new Handler();
private long fileSize = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnshowprogress = (Button) findViewById(R.id.btnStartProgress);
btnshowprogress.setOnClickListener(
new OnClickListener() {
@Override
public void onClick(View v) {
// prepare for a progress bar dialog
progress = new ProgressDialog(v.getContext());
progress.setMessage("Show Progress ...");
progress.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progress.setProgress(0);
progress.setMax(100);
progress.show();
//reset progress bar status
progressStatus = 0;
//reset filesize
fileSize = 0;
new Thread(new Runnable() {
public void run() {
while (progressStatus < 100) {
// process some tasks
progressStatus = doSomeTasks();
// your computer is too fast, sleep 1 second
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
// Update the progress bar
progressBarHandler.post(new Runnable() {
public void run() {
progress.setProgress(progressStatus);
}
});
}
// ok, file is downloaded,
if (progressStatus >= 100) {
// sleep 2 seconds, so that you can see the 100%
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
// close the progress bar dialog
progress.dismiss();
}
}
}).start();
}
});
}
// file download simulator... a really simple
public int doSomeTasks() {
while (fileSize <= 1000000) {
fileSize++;
if (fileSize == 100000) {
return 10;
} else if (fileSize == 200000) {
return 20;
} else if (fileSize == 300000) {
return 30;
}
// ...add your own
}
return 100;
}
}

Step 3

Step 4

When you will click on a button: