use android download manager instead of own download task

mobile/src/com/cradle/iitc_mobile/async/DownloadIitcUpdate.java

@@ -1,99 +0,0 @@
-package com.cradle.iitc_mobile.async;
-
-import android.app.ProgressDialog;
-import android.content.Intent;
-import android.net.Uri;
-import android.os.AsyncTask;
-import android.os.Environment;
-import android.util.Log;
-
-import com.cradle.iitc_mobile.IITC_Mobile;
-
-import java.io.BufferedInputStream;
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.net.URL;
-import java.net.URLConnection;
-
-/**
- * Background Async Task to download file
- * */
-public class DownloadIitcUpdate extends AsyncTask<String, Integer, String> {
-
-    private final IITC_Mobile mIitc;
-    private final ProgressDialog mProgressDialog;
-
-    public DownloadIitcUpdate(IITC_Mobile iitcm) {
-        mIitc = iitcm;
-        mProgressDialog = iitcm.getProgressDialog();
-    }
-
-    @Override
-    protected void onPreExecute() {
-        super.onPreExecute();
-        mProgressDialog.show();
-    }
-
-    @Override
-    protected String doInBackground(String... fileUrl) {
-        int count;
-        try {
-            URL url = new URL(fileUrl[0]);
-            URLConnection connection = url.openConnection();
-            connection.connect();
-            int lengthOfFile = connection.getContentLength();
-
-            // input stream to read file - with 8k buffer
-            InputStream input = new BufferedInputStream(url.openStream(), 8192);
-
-            // Output stream to write file
-            OutputStream output = new FileOutputStream(Environment.getExternalStorageDirectory().toString()
-                    + "/iitc_update.apk");
-
-            byte data[] = new byte[8192];
-
-            long total = 0;
-
-            while ((count = input.read(data)) != -1) {
-                total += count;
-                // publishing the progress....
-                publishProgress((int)(total*100)/lengthOfFile);
-
-                // writing data to file
-                output.write(data, 0, count);
-            }
-
-            output.flush();
-
-            // closing streams
-            output.close();
-            input.close();
-
-        } catch (Exception e) {
-            Log.e("iitcm:", e.getMessage());
-        }
-
-        return null;
-    }
-
-    protected void onProgressUpdate(Integer... progress) {
-        super.onProgressUpdate(progress);
-        // if we get here, length is known, now set indeterminate to false
-        mProgressDialog.setIndeterminate(false);
-        mProgressDialog.setMax(100);
-        mProgressDialog.setProgress(progress[0]);
-   }
-
-    @Override
-    protected void onPostExecute(String fileUrl) {
-        // dismiss the dialog after the file was downloaded
-        mProgressDialog.dismiss();
-
-        String iitcPath = Environment.getExternalStorageDirectory().toString() + "/iitc_update.apk";
-        Intent intent = new Intent(Intent.ACTION_VIEW);
-        intent.setDataAndType(Uri.fromFile(new File(iitcPath)), "application/vnd.android.package-archive");
-        mIitc.startActivityForResult(intent, mIitc.REQUEST_UPDATE_FINISHED);
-    }
-}