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: