Android updates the notification bar with a progress bar and android progress bar

Android updates the notification bar with a progress bar and android progress bar

After checking the information on the Internet, the Android version update notification bar contains a progress bar, which is drunk and basically copied. Some codes are incomplete, even the source code is not downloaded, and points are required for downloading, it's so dark !! I have also written a Notification in the Custom Notification bar before. I want to write it myself.

Because you need to access the network to download an update in the notification bar, a service is written and an update is downloaded in the service.

First look at the MainActivity code:

Package com. wsj. wsjdemo; import android. OS. bundle; import android. app. activity; import android. app. alertDialog; import android. content. dialogInterface; import android. content. intent; import android. view. menu; public class MainActivity extends Activity {@ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); initGlobal (); checkVersion () ;}/ *** initialize the global variable * in actual work, serverVersion is obtained from the server, it is best to execute */public void initGlobal () {try {Global. localVersion = getPackageManager (). getPackageInfo (getPackageName (), 0 ). versionCode; // set the local version Global. serverVersion = 2; // assume that the server version is 2 and the local version is 1} catch (Exception ex) {ex. printStackTrace () ;}}/*** check the updated version */public void checkVersion () {if (Global. localVersion <Global. serverVersion) {// when a new version is found, the user is prompted to update AlertDialog. builder alert = new AlertDialog. builder (this); alert. setTitle ("software upgrade "). setMessage ("A new version is found. We recommend that you update it now. "). setPositiveButton ("Update", new DialogInterface. onClickListener () {public void onClick (DialogInterface Diener, int which) {// enable the update Service UpdateService // to better modularize update, you can upload updateService dependent values // such as layout ID, resource ID, and dynamically obtained title. Here we use app_name as an example: Intent updateIntent = new Intent (MainActivity. this, UpdateService. class); updateIntent. putExtra ("app_name", R. string. app_name); updateIntent. putExtra ("downurl", "http://www.subangloan.com/Contract/App/Android/caijia_unsign_signed.apk"); startService (updateIntent );}}). setNegativeButton ("cancel", new DialogInterface. onClickListener () {public void onClick (DialogInterface diich, int which) {dialog. dismiss () ;}}); alert. create (). show ();} else {// cleanup, skip // cheanUpdateFile (), and I will attach the code later }}}

Activity_main.xml file: nothing is a simple interface

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/hello_world" /></LinearLayout>

Global. java used in Main

Package com. wsj. wsjdemo; public class Global {// version information public static int localVersion = 0; public static int serverVersion = 0; public static String downloadDir = "app/download /";}

UpdateService. java

Package com. wsj. wsjdemo; import java. io. file; import java. io. IOException; import java. text. decimalFormat; import com. lidroid. xutils. httpUtils; import com. lidroid. xutils. exception. httpException; import com. lidroid. xutils. http. responseInfo; import com. lidroid. xutils. http. callback. requestCallBack; import android. app. notification; import android. app. icationicationmanager; import android. app. pendingIntent; import Droid. app. service; import android. content. context; import android. content. intent; import android.net. uri; import android. OS. handler; import android. OS. IBinder; import android. OS. message; import android. widget. remoteViews; public class UpdateService extends Service {private static String down_url; // = "http: // 192.168.1.112: 8080/360. apk "; private static final int DOWN_ OK = 1; // private static final int downloaded DOWN_ERROR = 0; private String app_name; private icationicationmanager icationmanager; private Notification notification; private Intent updateIntent; private PendingIntent pendingIntent; private String updateFile; private int icationication_id = 0; long totalSize = 0; // total file size/*** update UI */final Handler handler = new Handler () {@ SuppressWarnings ("deprecation") @ Overridepublic void handleMessage (Message m Sg) {switch (msg. what) {case DOWN_ OK: // download complete. Click to install Intent installApkIntent = getFileIntent (new File (updateFile); pendingIntent = PendingIntent. getActivity (UpdateService. this, 0, installApkIntent, 0); notification. contentIntent = pendingIntent; notification. flags | = Notification. FLAG_AUTO_CANCEL; notification. setLatestEventInfo (UpdateService. this, app_name, "Download succeeded, click to install", pendingIntent); icationicationmanage R. Y (ication_id _id, notification); stopService (updateIntent); break; case DOWN_ERROR: notification. setLatestEventInfo (UpdateService. this, app_name, "Download failed", pendingIntent); break; default: stopService (updateIntent); break ;}};@ Overridepublic IBinder onBind (Intent arg0) {return null ;} @ Overridepublic int onStartCommand (Intent intent, int flags, int startId) {if (intent! = Null) {try {app_name = intent. getStringExtra ("app_name"); down_url = intent. getStringExtra ("downurl"); // create the File updateFile = FileUtils. getDiskCacheDir (getApplicationContext (), "xxxx.apk"); if (! UpdateFile. exists () {try {updateFile. createNewFile ();} catch (IOException e) {e. printStackTrace () ;}/// create notification createNotification (); // start downloadUpdateFile (down_url, updateFile. getAbsolutePath ();} catch (Exception e) {e. printStackTrace () ;}} return super. onStartCommand (intent, flags, startId);}/***** create a notification bar */RemoteViews contentView; @ SuppressWarnings ("deprecation") public void createNotification () {icationicationmanager = (icationicationmanager) getSystemService (Context. NOTIFICATION_SERVICE); notification = new Notification (); notification. icon = R. drawable. ic_launcher; // this parameter is the value that indicates the flash of the notification. notification. tickerText = "Start download"; // pendingIntent = PendingIntent. getActivity (this, 0, updateIntent, 0); // The following parameters are the notification content displayed in the view bar. setLatestEventInfo (this, app_name, "downloaded: 0%", pendingIntent); // icationicationmanager. Y (ication_id _id, notification);/*** here we use a custom view to display Notification */contentView = new RemoteViews (getPackageName (), R. layout. notification_item); contentView. setTextViewText (R. id. notificationTitle, "downloading"); contentView. setTextViewText (R. id. icationicationpercent, "0%"); contentView. setProgressBar (R. id. icationicationss, 100, 0, false); notification. contentView = contentView; updateIntent = new Intent (this, MainActivity. class); updateIntent. addFlags (Intent. FLAG_ACTIVITY_SINGLE_TOP); pendingIntent = PendingIntent. getActivity (this, 0, updateIntent, 0); notification. contentIntent = pendingIntent; icationicationmanager. Y (ication_id _id, notification);}/***** download file */public void downloadUpdateFile (String down_url, String file) throws Exception {updateFile = file; httpUtils = new HttpUtils (); HttpUtils. download (down_url, file, new RequestCallBack <File> () {@ Overridepublic void onSuccess (ResponseInfo <File> responseInfo) {// Message message = handler. obtainMessage (); message. what = DOWN_ OK; handler. sendMessage (message); installApk (new File (updateFile), UpdateService. this) ;}@ Overridepublic void onFailure (HttpException error, String msg) {Message message = handler. obtainMessage (); message. what = DOWN_ERROR; handler. sendMessage (message) ;}@ Overridepublic void onLoading (long total, long current, boolean isUploading) {super. onLoading (total, current, isUploading); double x_double = current * 1.0; double tempresult = x_double/total; DecimalFormat df1 = new DecimalFormat ("0.00 ");//##. 00% // percent format, followed by less than two digits with 0 fill String result = df1.format (tempresult); contentView. setTextViewText (R. id. icationicationpercent, (int) (Float. parseFloat (result) * 100) + "%"); contentView. setProgressBar (R. id. icationicationss, 100, (int) (Float. parseFloat (result) * 100), false); icationicationmanager. Y (ication_id _id, notification) ;}}) ;}// after the download is complete, open the apk installation page public static void installApk (File file, Context context) {// L. I ("msg", "Path of the installation package for obtaining the SD card through version update =" + file. getAbsolutePath (); Intent openFile = getFileIntent (file); context. startActivity (openFile);} public static Intent getFileIntent (File file) {Uri uri = Uri. fromFile (file); String type = getMIMEType (file); Intent intent = new Intent ("android. intent. action. VIEW "); intent. addCategory ("android. intent. category. DEFAULT "); intent. addFlags (Intent. FLAG_ACTIVITY_NEW_TASK); intent. setDataAndType (uri, type); return intent;} public static String getMIMEType (File f) {String type = ""; String fName = f. getName (); // get the extension String end = fName. substring (fName. lastIndexOf (". ") + 1, fName. length (); if (end. equals ("apk") {type = "application/vnd. android. package-archive ";} else {// * If you cannot open the package directly, you can jump out of the Software List and select */type =" */* ";} return type ;}}

Basically, annotations are clearly written, which uses the Xutils open-source framework to download files.

If you think it is difficult to see it, click Download demo without points. If you think it is good, I hope to give a comment at the bottom of the article. This is also my option. Thank you.

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