My Life with Android
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Android ProgressBar

  • We can display the android progress bar dialog box to display the status of work being done e.g. downloading file, analyzing status of work etc.
  • In this example, we are displaying the progress dialog for dummy file download operation.
  • Here we are using android.app.ProgressDialog class to show the progress bar.
  • Android ProgressDialog is the subclass of AlertDialog class.
  • The ProgressDialog class provides methods to work on progress bar like setProgress(), setMessage(), setProgressStyle(), setMax(), show() etc. The progress range of Progress Dialog is 0 to 10000.

Android Progress Bar Example by ProgressDialog

1. activity_main.xml

File: activity_main.xml

<RelativeLayout xmlns:androclass="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" >  
  
    <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="116dp"  
        android:text="download file" />  
  
</RelativeLayout>

2. Activity class

It displays the popup menu on button click.
File: MainActivity.java

import android.app.Activity;  
import android.app.ProgressDialog;  
import android.os.Bundle;  
import android.os.Handler;  
import android.widget.Button;  
import android.view.Menu;  
import android.view.View;  
import android.view.View.OnClickListener;  
public class MainActivity extends Activity {  
    Button btnStartProgress;  
    ProgressDialog progressBar;  
    private int progressBarStatus = 0;  
    private Handler progressBarHandler = new Handler();  
        private long fileSize = 0;  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
        addListenerOnButtonClick();  
    }  
    public void addListenerOnButtonClick() {  
        btnStartProgress = (Button) findViewById(R.id.button1);  
        btnStartProgress.setOnClickListener(new OnClickListener(){  
   
           @Override  
           public void onClick(View v) {  
            // creating progress bar dialog  
            progressBar = new ProgressDialog(v.getContext());  
            progressBar.setCancelable(true);  
            progressBar.setMessage("File downloading ...");  
            progressBar.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);  
            progressBar.setProgress(0);  
            progressBar.setMax(100);  
            progressBar.show();  
            //reset progress bar and filesize status  
            progressBarStatus = 0;  
            fileSize = 0;  
   
            new Thread(new Runnable() {  
              public void run() {  
                while (progressBarStatus < 100) {  
                  // performing operation  
                  progressBarStatus = doOperation();  
                  try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}  
                  // Updating the progress bar  
                  progressBarHandler.post(new Runnable() {  
                    public void run() {  
                      progressBar.setProgress(progressBarStatus);  
                    }  
                  });  
                }  
                // performing operation if file is downloaded,  
                if (progressBarStatus >= 100) {  
                    // sleeping for 1 second after operation completed  
                    try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}  
                    // close the progress bar dialog  
                    progressBar.dismiss();  
                }  
              }  
             }).start();  
            }//end of onClick method  
          });  
         }  
    // checking how much file is downloaded and updating the filesize   
    public int doOperation() {  
        //The range of ProgressDialog starts from 0 to 10000  
        while (fileSize <= 10000) {  
            fileSize++;  
            if (fileSize == 1000) {  
                return 10;  
            } else if (fileSize == 2000) {  
                return 20;  
            } else if (fileSize == 3000) {  
                return 30;  
            } else if (fileSize == 4000) {  
            return 40;//you can add more else if  
            } else{  
                return 100;  
            }  
        }//end of while  
        return 100;  
    }//end of doOperation  
  
    @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;  
    }  
}  

OUTPUT :