Android Program version Update--Notification bar update download installation

Android app check version update, download in the notification bar, update download progress, download complete automatic installation, as follows:

• Check the current version number

The Versioncode in the Androidmanifest file is used to identify the version, where the server puts a new version of Apk,versioncode greater than the current version, and the following code is used to get the value of Versioncode

PackageInfo PackageInfo = Context.getpackagemanager (). Getpackageinfo (Context.getpackagename (), 0); int localVersion = Packageinfo.versioncode;

Compare with current Versioncode and server side, if less than, make version update

• Download APK file

/**   * Download apk   *    * @param apkuri   * *
private void downloadnewapk (String Apkuri, string version) {        manager = (notificationmanager) context                . Getsystemservice (context. Notification_service));        notify = new Notification ();        Notify.icon = R.drawable.ic_launcher;        The notification bar displays the layout file used        Notify.contentview = new Remoteviews (Context.getpackagename (),                R.layout.view_notify_item );        Manager.notify (notify);        Build the downloaded APK file      fileinstall = Fileoperate.mkdirsdcardfile ("DownLoad", Apk_name                + version + ". apk");        Downloadschedule (Apkuri, Completehandler, context,                fileinstall);    }

Fileoperate is a file tool class that you write yourself

The layout displayed by the notification bar, View_notify_item.xml

<?xml version= "1.0" encoding= "Utf-8"? ><relativelayout xmlns:android= "http://schemas.android.com/apk/res/ Android "Android:layout_width=" Match_parent "android:layout_height=" match_parent "android:layout_marginleft=" 10DP         "Android:background=" #00000000 "android:padding=" 5DP "> <imageview android:id=" @+id/notify_icon_iv "    Android:layout_width= "25DP" android:layout_height= "25DP" android:src= "@drawable/ic_launcher"/> <textview android:id= "@+id/notify_updata_values_tv" android:layout_width= "Wrap_content" Android:        layout_height= "Wrap_content" android:layout_centerhorizontal= "true" android:layout_marginbottom= "6DP" android:layout_marginleft= "15DP" android:layout_margintop= "5DP" android:layout_torightof= "@id/notify_icon_i V "android:gravity=" center_vertical "android:text=" 0% "android:textcolor=" @color/white "Androi D:textsize= "12SP"/> &LT;PROgressbar android:id= "@+id/notify_updata_progress" style= "@android: Style/widget.progressbar.horizontal" Android:layout_width= "Fill_parent" android:layout_height= "wrap_content" android:layout_below= "@id/notify_ Icon_iv "android:layout_margintop=" 4DP "android:max="/></relativelayout>

/** * Connect to the network, download a file, and return the progress * * @param URI * @param handler * @param context * @param file */
public static void Downloadschedule (Final String URI, final Handler Handler, context context, final file file)            {if (!file.exists ()) {handler.sendemptymessage (-1);        Return        }//Read the length of the file each time final int perlength = 4096;                New Thread () {@Override public void run () {super.run ();                    try {URL url = new URL (URI);                    HttpURLConnection conn = (httpurlconnection) URL. OpenConnection ();                    Conn.setdoinput (TRUE);                    Conn.connect ();                    InputStream in = Conn.getinputstream ();                    2865412 Long length = Conn.getcontentlength ();                    1k byte[per read] buffer = new Byte[perlength];                    int len =-1;                    FileOutputStream out = new FileOutputStream (file); int temp = 0;                        while (len = in.read (buffer))! =-1) {//write to file out.write (buffer, 0, Len);                        Current progress int schedule = (int) ((File.length () * +)/length); Notifies update progress (10,7,4 evenly divisible before notification, no need to update progress every time) if (temp! = Schedule &am                            p;& (Schedule% = = 0 | | Schedule% 4 = 0 | | Schedule% 7 = 0)) {//Ensure that the same data is only sent once                            temp = schedule;                        Handler.sendemptymessage (schedule);                    }} out.flush ();                    Out.close ();                In.close ();                } catch (IOException e) {e.printstacktrace ();    }}}.start (); }

Handler updates based on download progress

• Update Notification bar progress bar

/**  * UPDATE Notification bar * *  
Private Handler Completehandler = new Handler () {public        void Handlemessage (Android.os.Message msg) {            //update Notification bar 
   if (Msg.what <) {                Notify.contentView.setTextViewText (                        r.id.notify_updata_values_tv, Msg.what + "%");                Notify.contentView.setProgressBar (r.id.notify_updata_progress,                        msg.what, false);                Manager.notify (notify);            } else {                Notify.contentView.setTextViewText (                        r.id.notify_updata_values_tv, "Download Complete");                Notify.contentView.setProgressBar (r.id.notify_updata_progress,                        msg.what, false);//clear the notification bar                Manager.cancel (+);                INSTALLAPK (Fileinstall);};};    

The system installation is called after the download is complete.

• Install APK

/**  * Install apk  *   * @param file  * *
private void installapk (file file) {        Intent Intent = new Intent ();        Intent.addflags (intent.flag_activity_new_task);        Intent.setaction (Android.content.Intent.ACTION_VIEW);        Intent.setdataandtype (uri.fromfile (file),                "application/vnd.android.package-archive");        Context.startactivity (intent);    }

Installation done.