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    <p>Have a try with this code. </p> <pre><code>package com.example.stack; import java.io.BufferedInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import java.net.URL; import java.net.URLConnection; import android.app.Activity; import android.app.ProgressDialog; import android.content.Intent; import android.os.AsyncTask; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.RelativeLayout; public class MainActivity extends Activity { ProgressDialog mProgressDialog; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); overridePendingTransition(R.anim.enter, R.anim.enter); setContentView(R.layout.activity_main); // declare the dialog as a member field of your activity // instantiate it within the onCreate method mProgressDialog = new ProgressDialog(MainActivity.this); mProgressDialog.setMessage("A message"); mProgressDialog.setIndeterminate(false); mProgressDialog.setMax(100); mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); // execute this when the downloader must be fired DownloadFile downloadFile = new DownloadFile(); downloadFile.execute("http://java.net/downloads/jfjug/SCJP%20Sun%20Certified%20Programmer%20for%20Java%206-0071591060.pdf"); } //The AsyncTask will look like this: // usually, subclasses of AsyncTask are declared inside the activity class. // that way, you can easily modify the UI thread from here private class DownloadFile extends AsyncTask&lt;String, Integer, String&gt; { @Override protected String doInBackground(String... sUrl) { try { URL url = new URL(sUrl[0]); URLConnection connection = url.openConnection(); connection.connect(); // this will be useful so that you can show a typical 0-100% progress bar int fileLength = connection.getContentLength(); // download the file InputStream input = new BufferedInputStream(url.openStream()); OutputStream output = new FileOutputStream("/sdcard/output.pdf"); byte data[] = new byte[1024]; long total = 0; int count; while ((count = input.read(data)) != -1) { total += count; // publishing the progress.... publishProgress((int) (total * 100 / fileLength)); output.write(data, 0, count); } output.flush(); output.close(); input.close(); } catch (Exception e) { } return null; } //The method above (doInBackground) runs always on a background thread. You shouldn't do any UI tasks there. On the other hand, the onProgressUpdate and onPreExecute run on the UI thread, so there you can change the progress bar: @Override protected void onPreExecute() { super.onPreExecute(); mProgressDialog.show(); } @Override protected void onProgressUpdate(Integer... progress) { super.onProgressUpdate(progress); mProgressDialog.setProgress(progress[0]); } } } </code></pre> <p>Add the following permission in you manifest file .</p> <pre><code> &lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/&gt; &lt;uses-permission android:name="android.permission.INTERNET"/&gt; </code></pre> <p>i have tested in mobile too. its worked. </p>
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    1. POdownloading file in sdcard showing size 0
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    1. USitsrajesh4uguys
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    1. COdownloadFile.execute("http://java.net/downloads/jfjug/SCJP%20Sun%20Certified%20Programmer%20for%20Java%206-0071591060.pdf"); where this method is defined?
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    2. COthat is not a method. that's AsyncTask. with the argument String (thats is your pdf url). .execute is the way of calling AsyncTask
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    3. COyes now it works fine ... thank you...
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