Install the latest apk without opening other programs.

Original Problem description: I checked the application version every 24 hours on the web server background. If the update is available, the system prompts you to download the new apk. [Java] Uri uri = Uri. parse (downloadURL); Intent intent = new Intent (Intent. ACTION_VIEW, uri); startActivity (intent); the above Code opens the user's browser and starts downloading. I don't want to open the browser, but I need to download the apk file. Or directly install the latest apk without opening other programs. How to implement it? Solution: First, you need to download the apk file String extStorageDirectory = Environment. getExternalStorageDirectory (). toString (); File folder = new File (extStorageDirectory, "APPS"); folder. mkdir (); File file = new File (folder, "AnyName. "+" apk "); try {file. createNewFile ();} catch (IOException e1) {e1.printStackTrace ();}/*** APKURL is your apk file url (server url) */DownloadFile ("APKURL ", file); The DownloadFile function is [java public void DownloadFile (String fileURL, File directory) {try {FileOutputStream f = new FileOutputStream (directory); URL u = new URL (fileURL ); httpURLConnection c = (HttpURLConnection) u. openConnection (); c. setRequestMethod ("GET"); // c. setDoOutput (true); c. connect (); InputStream in = c. getInputStream (); byte [] buffer = new byte [1024]; int len1 = 0; while (len1 = in. read (buffer)> 0) {f. write (buffer, 0, len1);} f. close ();} catch (Exception e) {System. out. println ("exception in DownloadFile: --------" + e. toString (); e. printStackTrace ();} after downloading the apk file, add the following code [java] Intent intent = new Intent (Intent. ACTION_VIEW); intent. setDataAndType (Uri. fromFile (new File (Environment. getExternalStorageDirectory () + "/APPS/" + "AnyName.apk"), "application/vnd. android. package-archive "); startActivity (intent); Add the permission to the manifest file [java] <uses-permission android: name =" android. permission. INTERNET "/> <uses-permission android: name =" android. permission. WRITE_EXTERNAL_STORAGE "/>