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POTrying to download a PDF file from my app,but it's not working
 

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    <p>I am beginner in android development,I am working on a project and for that i need to download the PDF file from a URL to my phone using <strong>async task</strong>,also i need to show the <strong>progress dialog</strong> while the file is being downloaded.</p> <p><strong>Here's how my MainActivity.java goes..</strong></p> <pre><code>public class MainActivity extends Activity { String[] listItem; String[] listItemURLs; ProgressDialog mProgressDialog; ListView lv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.diff_view1); // instantiate it within the onCreate method mProgressDialog = new ProgressDialog(MainActivity.this); mProgressDialog.setMessage("Downloading file..please wait."); mProgressDialog.setIndeterminate(false); mProgressDialog.setMax(100); mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); listItem = new String[] { "File 1", "File 2", "File 3", "File 4", "File 5", "File 6", "File 7" }; listItemURLs = new String[] { "http://www.ztsinc.com/MBTLA2_ds.pdf", "http://www.ztsinc.com/MBT1_ds.pdf", "http://www.ztsinc.com/MINIMBT_ds.pdf", "http://www.ztsinc.com/MINI9R_ds.pdf", "http://www.ztsinc.com/MBTLA2_OI.pdf", "http://www.ztsinc.com/MBT1_OI.pdf", "http://www.ztsinc.com/MINIMBT_MINI9R_OI.pdf" }; lv = (ListView) findViewById(R.id.listview1); lv.setAdapter(new ArrayAdapter&lt;String&gt;(MainActivity.this, android.R.layout.simple_list_item_1, listItem)); lv.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView&lt;?&gt; parent, final View view, final int position, long id) { AlertDialog.Builder da = new AlertDialog.Builder( MainActivity.this); da.setMessage("Do you want to download this file?"); da.setPositiveButton("YES", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { downloadPDF downloadpdf = new downloadPDF(view, position); downloadpdf.execute(listItemURLs[position]); } }); da.setNegativeButton("No", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }); da.show(); } }); } public class downloadPDF extends AsyncTask&lt;String, Integer, String&gt; { private View mView; private int mPosition; public downloadPDF(View view, int position) { mView = view; mPosition = position; } @Override public void onPreExecute() { super.onPreExecute(); mProgressDialog.show(); } String fileName = listItem[mPosition]; String fileExtension=".pdf"; @Override protected String doInBackground(String... sUrl) { try { URL url = new URL(sUrl[mPosition]); HttpURLConnection connection =(HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); connection.setDoOutput(true); connection.connect(); String PATH = Environment.getExternalStorageDirectory() + "/download/"; File file = new File(PATH); file.mkdirs(); File outputFile = new File(file,fileName + fileExtension); FileOutputStream fos = new FileOutputStream(outputFile); InputStream is = connection.getInputStream(); // this will be useful so that you can show a typical 0-100% // progress bar int fileLength = connection.getContentLength(); // download the file byte buffer[] = new byte[1024]; long total = 0; int len1 = 0; while ((len1 = is.read(buffer)) != -1) { total += len1; // publishing the progress.... publishProgress((int) (total * 100 / fileLength)); fos.write(buffer, 0, len1); } fos.flush(); fos.close(); is.close(); } catch (Exception e) { } return null; } public void onPostExecute(Integer... progress) { super.onProgressUpdate(progress); mProgressDialog.setProgress(progress[0]); Toast.makeText(MainActivity.this, "Download Complete", Toast.LENGTH_SHORT).show(); mProgressDialog.dismiss(); } } } </code></pre> <p><strong>My diff_view1.xml goes like this...</strong></p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:weightSum="1" &gt; &lt;ListView android:id="@+id/listview1" android:layout_width="fill_parent" android:layout_height="400dp" &gt; &lt;/ListView&gt; &lt;Button android:id="@+id/btnDownload" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Download" android:layout_marginTop="30dp"/&gt; &lt;/LinearLayout&gt; </code></pre> <p><strong>I have also added permissions in my manifest for internet,sdcard write,etc..</strong></p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.testProject.imageCheck" android:versionCode="1" android:versionName="1.0" &gt; &lt;uses-sdk android:minSdkVersion="8" /&gt; &lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /&gt; &lt;uses-permission android:name="android.permission.INTERNET" /&gt; &lt;uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /&gt; &lt;uses-permission android:name="android.permission.READ_PHONE_STATE" /&gt; &lt;application android:icon="@drawable/ic_launcher" android:label="@string/app_name" &gt; &lt;activity android:name=".MainActivity" android:label="Titles/Styled (via theme)" android:theme="@style/StyledIndicators" &gt; &lt;intent-filter&gt; &lt;action android:name="android.intent.action.MAIN" /&gt; &lt;category android:name="android.intent.category.LAUNCHER" /&gt; &lt;/intent-filter&gt; &lt;/activity&gt; &lt;/application&gt; &lt;/manifest&gt; </code></pre> <p>I have a listview filled up with an array adapter with elements like "File 1","File 2",etc. I am initiating object of the async task with "URLs" (those stored in array) as arguement,but when i run the and click on any of the listview item,the progress bar just gets stuck at 0% and then nothing happens. Can anyone help me? been doing this for hours but no success:(</p> <p>Thank you.</p>
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