Android ProgressBar Example

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ProgresBar

ProgressBar is used to show the progress of an operation.
ProgressBar is a Visual indicator of progress in some operation. Displays a bar to the user representing how far the operation has progressed; the application can change the amount of progress (modifying the length of the bar) as it moves forward. There is also a secondary progress displayable on a progress bar which is useful for displaying intermediate progress, such as the buffer level during a streaming playback progress bar.

Progress Bar Example

In this example I have shown the progress while downloading a file.

We can also customize a progress bar to make it more beautiful

 .Read How To Customize Progress Bar

 

Android Custom Alert Dialog Example

Some More Good  Android Topics
Customizing Toast In Android 
 Showing Toast for Longer Time
Customizing Checkboxes In Android  
Customizing Progress Bar
To learn Basic of Android Animation  go to  Android Animation Basics

 

main..xml

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    xmlns:android="http://schemas.android.com/apk/res/android">

   <TextView
        android:id="@+id/textView2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="40dp"
        android:gravity="center_horizontal"
        android:textSize="25dp"
        android:text="Progress Bar Example" />

    <Button
        android:id="@+id/button1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        android:onClick="startProgressDialog"
        android:text="Start Downloading File" />

</LinearLayout>

Note: To add a progress bar to a layout file, you can use the <ProgressBar> element. By default, the progress bar is a spinning wheel (an indeterminate indicator). To change to a horizontal progress bar, apply the Widget.ProgressBar.Horizontal style, like so:

ProgressBarActivity.java

public class ProgressBarActivity extends Activity
{
  

    Button btnStartProgress;
    ProgressDialog progressBar;
    private int progressBarStatus = 0;
    private Handler progressBarHandler = new Handler();

    private long fileSize = 0;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
    }

    public void startProgressDialog(View V)
    {
       

                    // prepare for a progress bar dialog
                    progressBar = new ProgressDialog(V.getContext());
                    progressBar.setCancelable(true);
                    progressBar.setMessage("Downloading File...");
                    progressBar.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                    progressBar.setProgress(0);
                    progressBar.setMax(100);
                    progressBar.show();

                    //reset progress bar status
                    progressBarStatus = 0;

                    //reset filesize
                    fileSize = 0;

                    new Thread(new Runnable() {
                        public void run() {
                            while (progressBarStatus < 100) {

                                    // process some tasks
                                progressBarStatus = fileDownloadStatus();

                                //  sleep 1 second to show the progress
                                try {
                                        Thread.sleep(1000);
                                    }
                                catch (InterruptedException e) {
                                        e.printStackTrace();
                                    }

                                // Update the progress bar
                                progressBarHandler.post(new Runnable() {
                                    public void run() {
                                        progressBar.setProgress(progressBarStatus);
                                    }
                                });
                            }

                            // when, file is downloaded 100%,
                            if (progressBarStatus >= 100) {

                                // sleep 2 seconds, so that you can see the 100% of file download
                                try {
                                    Thread.sleep(2000);
                                } catch (InterruptedException e) {
                                    e.printStackTrace();
                                }

                                // close the progress bar dialog
                                progressBar.dismiss();
                            }
                        }
                    }).start();

      }


      


  //method returns the % of file downloaded
    public int fileDownloadStatus()
    {

        while (fileSize <= 1000000) {

                      fileSize++;

                       if (fileSize == 100000) {
                            return 10;
                       } else if (fileSize == 200000) {
                           return 20;
                       } else if (fileSize == 300000) {
                          return 30;
                       } else if (fileSize == 400000) {
                          return 40;
                       } else if (fileSize == 500000) {
                          return 50;
                      } else if (fileSize == 600000) {
                         return 60;
                      }
            // write your code here

        }

        return 100;

    }

We can also customize a progress bar to make it more beautiful

 .Read How To Customize Progress Bar

 

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