Progress bar example ProgressDialog in Android

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

In Android there is a class called ProgressDialog that allows you to create a progress bar. To do this, you need to instantiate an object of this class. Its syntax is as follows:

 ProgressDialog progress = new ProgressDialog( this );

Now, you can set some properties of this dialog box. For example, its style, text, etc.

 progress.setMessage( "Downloading Music :) " );
 progress.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
 progress.setIndeterminate( true );

In addition to these methods, the ProgressDialog class also provides other methods:

Example

This example illustrates the use of dialog horizontal progress, which is actually a progress bar. It displays the progress bar when a button is pressed.

To test this example, you need to follow the steps below to develop the application and run it on an actual device.

The following is the content of the modified main activity file src/com.yiibai.progressdialog/MainActivity.java.

 package com.example.progressdialog; 
 
 import com.example.progressdialog.R; 
 
 import android.os.Bundle;
 import android.app.Activity;
 import android.app.ProgressDialog;
 import android.view.Menu;
 import android.view.View; 
 
 public   class MainActivity extends Activity { 
 
 private ProgressDialog progress;
 @Override  
 protected   void onCreate(Bundle savedInstanceState) {
 super .onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      progress = new ProgressDialog( this );
 } 
 
 
 public   void open(View view){
      progress.setMessage( "Downloading Music :) " );
      progress.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
 //progress.setIndeterminate(true);  
 progress.show(); 
 
 final   int totalProgressTime = 100 ; 
 
 final Thread t = new Thread(){ 
 
 @Override  
 public   void run(){ 
  
 int jumpTime = 0 ;
 while (jumpTime < totalProgressTime){
 try {
 sleep( 200 );
 jumpTime += 5 ;
            progress.setProgress(jumpTime);
         } catch (InterruptedException e) {
 // TODO Auto-generated catch block  
           e.printStackTrace();
 } 
 
 } 
 
 }
 };
 t.start(); 
 
 }
 @Override  
 public   boolean onCreateOptionsMenu(Menu menu) {
 // Inflate the menu; this adds items to the action bar if it is present.  
      getMenuInflater().inflate(R.menu.main, menu);
 return   true ;
 }
 }

Modify the content of res/layout/activity_main.xml as follows

 <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"  
   android:paddingBottom= "@dimen/activity_vertical_margin"  
   android:paddingLeft= "@dimen/activity_horizontal_margin"  
   android:paddingRight= "@dimen/activity_horizontal_margin"  
   android:paddingTop= "@dimen/activity_vertical_margin"  
   tools:context= ".MainActivity" > 
 
 <Button
      android:id= "@+id/button1"  
      android:layout_width= "wrap_content"  
      android:layout_height= "wrap_content"   
      android:layout_alignParentTop= "true"  
      android:layout_centerHorizontal= "true"  
      android:layout_marginTop= "150dp"  
 android:onClick= "open"  
      android:text= "@string/download_button" /> 
 
 <TextView
      android:id= "@+id/textView1"  
      android:layout_width= "wrap_content"  
      android:layout_height= "wrap_content"  
      android:layout_alignParentRight= "true"  
      android:layout_alignParentTop= "true"  
      android:layout_marginTop= "19dp"  
      android:text= "@string/download_text"  
      android:textAppearance= "?android:attr/textAppearanceLarge" /> 
 
 </RelativeLayout>

Modify res/values/string.xml to the following content

 <? xml   version = "1.0"   encoding = "utf-8" ?>  
 < resources >  
 < string   name = "app_name" > ProgressDialog </ string >  
 < string   name = "action_settings" > Settings </ string >  
 < string   name = "hello_world" > Hello world! </ string >  
 < string   name = "download_button" > Download </ string >  
 < string   name = "download_text" > Press the button to download music </ string >  
 </ resources >  

This is the default AndroidManifest.xml file

 <? xml   version = "1.0"   encoding = "utf-8" ?>  
 < manifest   xmlns:android = "http://schemas.android.com/apk/res/android"  
 package = "com.yiibai.progressdialog"  
 android:versionCode = "1"  
 android:versionName = "1.0"   >   
 
 < uses-sdk  
 android:minSdkVersion = "8"  
 android:targetSdkVersion = "17"   />   
 
 < application  
 android:allowBackup = "true"  
 android:icon = "@drawable/ic_launcher"  
 android:label = "@string/app_name"  
 android:theme = "@style/AppTheme"   >  
 < activity  
 android:name = "com.yiibai.progressdialog.MainActivity"  
 android:label = "@string/app_name"   >  
 <intent-filter>​​  
 < action   android:name = "android.intent.action.MAIN"   />   
 
 < category   android:name = "android.intent.category.LAUNCHER"   />  
 </intent-filter>​​  
 </ activity >  
 </ application >   
 
 </ manifest >  

Let's try running the ProgressDialogDemo application. Assuming you have connected an actual Android mobile device to your computer. Before launching the application, the following window will be displayed with the option to select the Android application to run.

Select Mobile Device as an option and then view the Mobile Device display as follows:

Just press the button to start the progress bar. After pressing it, the following screen will be displayed:

It will continue to update itself, and after a few seconds, the following image will appear: