Method of Android Parsing XML File and Upgrading APK

Installing APK

public class DownLoadApk {
 public static SharedPreferences sharedPrederences = null;
 // Start the installation interface 
 public static void DownId(Context context, long downId){
  DownloadManager mDownloadManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
  Uri downloadUri = mDownloadManager.getUriForDownloadedFile(downId);
  startInstall(context, downloadUri);
 }
 /**
  *  Jump to the installation interface 
  * @param context  Scope 
  * @param uri  Package name 
  */
 private static void startInstall(Context context, Uri uri) {
  Intent install = new Intent(Intent.ACTION_VIEW);
  install.setDataAndType(uri, "application/vnd.android.package-archive");
  install.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
  context.startActivity(install);
 }
 // Delete a file 
 public static boolean fileDelete(String filePath) {
  File file = new File(filePath);
  if (file.exists() == false) {
   return false;
  }
  return file.delete();
 }

Send a request to get the input stream

Thread thread = new Thread() {
 @Override
 public void run() {
  super.run();
  //XML Store in ftp The address of the server 
  String path = FileUtils.getDevice_address()+"News.XML";
  try {
   URL url = new URL(path);
   HttpURLConnection conn = (HttpURLConnection) url
     .openConnection();
   conn.setRequestMethod("GET");
   conn.setConnectTimeout(5000);
   conn.setReadTimeout(5000);
   // Send http GET Request and obtain the corresponding code 
   if (conn.getResponseCode() == 200) {
    InputStream is = conn.getInputStream();
    // Use pull Parser, start parsing this stream 
    parseNewsXml(is);
   }
  } catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }
};
thread.start(); 

Parsing XML file

private void parseNewsXml(InputStream is) {
 XmlPullParser xp = Xml.newPullParser();
 try {
  xp.setInput(is, "utf-8");
  // By judging the event type of the node, we can know what the current node is 
  int type = xp.getEventType();
  News news = null;
  while (type != XmlPullParser.END_DOCUMENT) {
   switch (type) {
    case XmlPullParser.START_TAG:
     if ("newslist".equals(xp.getName())) {
      newsList = new ArrayList<>();
      break;
     } else if ("news".equals(xp.getName())) {
      news = new News();
      break;
     } else if ("name".equals(xp.getName())) {
      String name = xp.nextText();
      news.setName(name);
      break;
     } else if ("code".equals(xp.getName())) {
      String code = xp.nextText();
      news.setCode(code);
      break;
     }
    case XmlPullParser.END_TAG:
     if ("news".equals(xp.getName())) {
      newsList.add(news);
     }
     break;
     default:
     break;
   }
   // After parsing the current node, move the pointer to 1 Nodes until the node is finished and returns its event type 
   type = xp.next();
  }
  //  Send a message 
  handler.sendEmptyMessage(1);
 } catch (Exception e) {
  e.printStackTrace();
 }
}

You can start downloading

// Get Download Manager 
DownloadManager manager =(DownloadManager)mContext.getSystemService(mContext.DOWNLOAD_SERVICE);
handler = new Handler() {
 @Override
 public void handleMessage(Message msg) {
  super.handleMessage(msg);
  News news = newsList.get(0);
  Log.i("aii", "XML: "+news.getCode()+" , apk:"+getPackageInfo(mContext));
  if(Integer.valueOf(news.getCode())>Integer.valueOf(getPackageInfo(mContext))){
   if(dowmCliek) {
    // Open progress bar thread 
    isRun = true;
    dowmCliek = false;
    // Update APK Delete the original installation package before 
    DownLoadApk.fileDelete(path + "/" + mAPK);
    // Create a download request 
    DownloadManager.Request down = new DownloadManager.Request(
      Uri.parse(mWebsite));
    // Set the types of networks allowed, in this case mobile networks and wifi All right 
    down.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_MOBILE | DownloadManager.Request.NETWORK_WIFI);
    // It is forbidden to send notifications, which are downloaded in the background 
    down.setShowRunningNotification(true);
    // Do not display the download interface 
    down.setVisibleInDownloadsUi(true);
    // Title 
    down.setDestinationInExternalFilesDir(mContext, null, "XXX Upgrading ...");
    // Queue the download request and return to download id
    downId = manager.enqueue(down);
   }else{
    Toast.makeText(mContext," Upgrading ...",Toast.LENGTH_SHORT).show();
   }
  }else{
    Toast.makeText(mContext," It is the latest version and does not need to be upgraded ...",Toast.LENGTH_SHORT).show();
  }
 }
};

Track Download Progress

// Timing task 
ScheduledExecutorService scheduledExecutorService = Executors.newScheduledThreadPool(1);
scheduledExecutorService.scheduleAtFixedRate(new Runnable() {
   @Override
   public void run() {
    if(isRun) {
     Message msg = mHandler.obtainMessage();
     msg.what = 1;
     mHandler.sendMessage(msg);
    }
   }
  }, 0, 100, TimeUnit.MILLISECONDS);// Delay 0 , interval 100 In milliseconds 
private Handler mHandler = new Handler(new Handler.Callback() {
 @Override
 public boolean handleMessage(Message msg) {
  switch (msg.what) {
   case 1:
    //android Download Manager 
    DownloadManager.Query query = new DownloadManager.Query().setFilterById(downId);
    Cursor cursor = manager.query(query);
    if (cursor != null && cursor.moveToFirst()) {
     // Query the file size directly here 
     long downSize = cursor.getLong(cursor.getColumnIndex(
       DownloadManager.COLUMN_TOTAL_SIZE_BYTES));
     // Get the total file download size 
     fileTotalSize =cursor.getLong(cursor.getColumnIndex(
       DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR));
     cursor.close();

     Log.w(" Print ", " Total size " + downSize);
     Log.w(" Print ", " Download progress  " + fileTotalSize);
     if (fileTotalSize>0) {
      NumberFormat numberFormat = NumberFormat.getInstance();
      numberFormat.setMaximumFractionDigits(2);
      String result = numberFormat.format((float)fileTotalSize/(float)downSize*100);
      Log.w(" Print ", "downloaded size: " + result+"%");
      downBtn.setText(result+"%");
     }
     // Download finished 
     if(fileTotalSize==downSize) {
      isRun = false;
      downBtn.setText(" Click Upgrade ");
     }
    }
  }
  return true;
 }
});

Start the installation after downloading

DownloadCompleteReceiver receiver = new DownloadCompleteReceiver();
// Broadcast after downloading 
class DownloadCompleteReceiver extends BroadcastReceiver {
 @Override
 public void onReceive(Context context, Intent intent) {
  if(intent.getAction().equals(DownloadManager.ACTION_DOWNLOAD_COMPLETE)){
   long downId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
   if(downId!=-1) {
    // Start the installation 
    DownLoadApk.DownId(context,downId);
    dowmCliek=true;
   }
  }else{
   Toast.makeText(context, intent.getAction()+" Download failed ", Toast.LENGTH_SHORT).show();
  }
 }
}
// Start the download and complete the broadcast 
mContext.registerReceiver(receiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));

Get the project package name

private static String getPackageInfo(Context context) {
 PackageInfo pi = null;
 try {
  PackageManager pm = context.getPackageManager();
  pi = pm.getPackageInfo(context.getPackageName(),
    PackageManager.GET_CONFIGURATIONS);
  return pi.versionCode+"";
 } catch (Exception e) {
  e.printStackTrace();
 }
 return null;
}

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