CODEWITHSUNDEEP
androidasynchronousprogress-barandroid-asynctaskandroid-progressbar
Niki
Niki

Reputation: 1181

How to give a progressbar for the download?

In my application i'm downloading a video file. I want to show the progress bar for the download.

How is it possible through AsyncTask Concept?

Thanks,

Niki

Upvotes: 3

Views: 2705

Answers (2)

Eric Nordvik
Eric Nordvik

Reputation: 14746

Use the onProgressUpdate method of AsyncTask.

If you know the size of the file you can set the max value in onPreExecute:

protected void onPreExecute() {
  ProgressDialog myDialog = new ProgressDialog(context);
  myDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
  myDialog.setMax(maxValue);
  myDialog.show();
}

EDIT: added myDialog.show();

There are several methods to update the progress, either by incrementing by an amount or by setting the progress to a specific value:

@Override
protected void onProgressUpdate(Integer... progress) {
  myDialog.incrementProgressBy(progress[0]);

  // or
  // myDialog.setProgress(progress[0]);

}

Then in the onDoInBackground():

@Override
protected void doInBackGround() {
  // your code
  publishProgress(1);
}

EDIT example with progressbar in layout:

In your layout file, add a progressbar like this

<ProgressBar
    android:id="@+id/progressbar"
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    style="?android:attr/progressBarStyleHorizontal"
    android:visibility="gone"
    />

And in your asynctask:

protected void onPreExecute() {
  ProgressBar myProgress = findViewById(R.id.progressbar);
  myProgress.setMax(maxValue);
  myProgress.setVisibility(View.VISIBLE);
}

protected void onProgressUpdate(Integer... progress) {
  myProgress.setProgress(progress[0]);
}

Upvotes: 6

RAAAAM
RAAAAM

Reputation: 3380

First you have to calculate downloading timi, and then implement progress bar as per time limit. here i enclosed the sample program of progress bar 

new Thread(new Runnable() {
         public void run() {
             while (mProgressStatus < 100) {
                 mProgressStatus = doWork();

                 // Update the progress bar
                 mHandler.post(new Runnable() {
                     public void run() {
                         mProgress.setProgress(mProgressStatus);
                     }
                 });

And this is the code for calculating the Time length for downloading file

//once the connection has been opened

List values = urlConnection.getHeaderFields().get("content-Length")
if (values != null && !values.isEmpty()) {

// getHeaderFields() returns a Map with key=(String) header 
// name, value = List of String values for that header field. 
// just use the first value here.
String sLength = (String) values.get(0);

if (sLength != null) {
   //parse the length into an integer...
   }

Upvotes: 0

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