Android prompt version update operation flow

Android Prompt version update operation flow

May 8, 2014:

Andorid app will have version update operation, today's idle time spent a bit of thought, the main technical aspects of the use of Asynctask asynchronous loading, HTTP protocol, JSON parsing, get version number, etc...

Let's introduce the approximate process, first of all:

Activity_main.xml:

    <button         android:id= "@+id/chek_newest_version"        android:layout_width= "fill_parent"        android:layout _height= "Wrap_content"        android:layout_margin= "5dip"        android:text= "detect latest Version"/>

I just used a button here!

Next mainactivity code:

Asynchronous loading is started to handle, if the old version is less than the new version number, start the download operation, otherwise it will not be updated!

Take a step-by-step look!

public class Mainactivity extends Activity {Button m_btnchecknewestversion;long m_newvercode;//version number of the latest version string m_ Newvername; The version name of the latest edition is String m_appnamestr; Download to local name handler M_mainhandler to give this app a life; ProgressDialog M_progressdlg; @Overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate ( Savedinstancestate); Setcontentview (r.layout.activity_main);//Initialize related variable initvariable (); m_ Btnchecknewestversion.setonclicklistener (Btnclicklistener);} private void Initvariable () {m_btnchecknewestversion = (Button) Findviewbyid (r.id.chek_newest_version); M_mainhandler = new Handler (); M_progressdlg = new ProgressDialog (this); M_progressdlg.setprogressstyle (Progressdialog.style_ horizontal);    Sets whether the ProgressDialog progress bar is not explicitly false is not set to ambiguous m_progressdlg.setindeterminate (false); M_appnamestr = "haha.apk";} Onclicklistener Btnclicklistener = new View.onclicklistener () {@Overridepublic void OnClick (View v) {//TODO Auto-generat Ed method Stubnew Checknewestversionasynctask (). Execute ();}; Class ChecknewestVersionasynctask extends Asynctask<void, void, boolean>{@Overrideprotected Boolean doinbackground (void ... params) {//TODO auto-generated method Stubif (Postchecknewestversioncommand2server ()) {int vercode = Common.getvercode ( Getapplicationcontext ());         Use the method written in the first section above if (M_newvercode > Vercode) {return true;         } else {return false; }}return false;} @Overrideprotected void OnPostExecute (Boolean result) {//TODO auto-generated method stubif (Result) {// If you have the latest version donewversionupdate (); Update new version}else {notnewversiondlgshow ();//Prompt is currently the latest version}super.onpostexecute (result);} @Overrideprotected void OnPreExecute () {//TODO auto-generated method Stubsuper.onpreexecute ();}} /** * Gets the current latest version number from the server, if successful return ture, if failed, returns false * @return */private Boolean postchecknewestversioncommand2server () { StringBuilder builder = new StringBuilder (); Jsonarray Jsonarray = null;try {//Construct Post method {Name:value} parameter to list<namevaluepair> VPS = new Arraylist<namevaluePair> ();//pass parameters into the Post method Vps.add (new Basicnamevaluepair ("Action", "Checknewestversion"); builder = Common.post_to_ Server (VPS); LOG.E ("msg", Builder.tostring ()), Jsonarray = new Jsonarray (builder.tostring ()), if (Jsonarray.length () >0) {if ( Jsonarray.getjsonobject (0). GETINT ("id") = = 1) {m_newvername = Jsonarray.getjsonobject (0). getString ("Vername"); m_ Newvercode = Jsonarray.getjsonobject (0). Getlong ("Vercode"); return true;}} return false;} catch (Exception e) {log.e ("msg", E.getmessage ()); M_newvername= ""; M_newvercode=-1;return false;}}      /** * Hint update new version */private void Donewversionupdate () {int vercode = Common.getvercode (Getapplicationcontext ());          String vername = Common.getvername (Getapplicationcontext ()); String str= "Current version:" +vername+ "code:" +vercode+ ", found the new version:" +m_newvername+ "Code:" +m_newvercode+ ", is it updated?      "; Dialog Dialog = new Alertdialog.builder (this). Settitle ("Software Update"). Setmessage (str)//setup content. setposit Ivebutton ("Update",//Set OK button nEW Dialoginterface.onclicklistener () {@Override public void OnClick (Dia Loginterface dialog, int which) {M_progressdlg.settitle ("under                              ");                              M_progressdlg.setmessage ("Please wait ...");  Downfile (common.updatesoftaddress); Start download}). Setnegativebutton ("Not updated", New D                                  Ialoginterface.onclicklistener () {public void OnClick (Dialoginterface dialog,                          int Whichbutton) {//click "Cancel" button to exit the program after finish ();  }). Create ();//Creates a dialog box Dialog.show ();      }/** * Hint is currently the latest version */private void Notnewversiondlgshow () {int vercode = Common.getvercode (this);     String Vername = Common.getvername (this); StringStr= "Current version:" +vername+ "Code:" +vercode+ ",/n is the latest version, no need to update!"; Dialog Dialog = new Alertdialog.builder (this). Settitle ("Software Update"). Setmessage (str)//set content. setposit                          Ivebutton ("OK",//Set OK button new Dialoginterface.onclicklistener () {@Override                              public void OnClick (Dialoginterface dialog, int which) {                          Finish ();  }). Create ();//Creates a dialog box Dialog.show ();      }private void Downfile (final String URL) {m_progressdlg.show ();              New Thread () {public void run () {HttpClient client = new Defaulthttpclient ();              HttpGet get = new HttpGet (URL);              HttpResponse response;                  try {response = Client.execute (get);                  httpentity entity = response.getentity ();         Long length = Entity.getcontentlength ();                         M_progressdlg.setmax (int) length);//Set the maximum value of the progress bar inputstream is = ent                  Ity.getcontent ();                  FileOutputStream fileoutputstream = null; if (is = null) {File File = new file (Environment.getexternalstoragedi                      Rectory (), M_APPNAMESTR);                      FileOutputStream = new FileOutputStream (file);                      byte[] buf = new byte[1024];                      int ch =-1;                      int count = 0;                          while (ch = is.read (BUF))! =-1) {fileoutputstream.write (buf, 0, ch);                          Count + = ch;                        if (length > 0) {m_progressdlg.setprogress (count);                  }}} Fileoutputstream.flush (); if (FileOutputStream! = null){Fileoutputstream.close ();  } down ();              Tell hander that the download is complete and that you can install the} catch (Clientprotocolexception e) {e.printstacktrace ();              } catch (IOException e) {e.printstacktrace ();  }}}.start (); }/** * Tell hander that the download is complete, you can install the */private void Down () {M_mainhandler.post (new Runnable () {public void run                () {m_progressdlg.cancel ();            Update (); }        });}        /** * Setup program */void Update () {Intent Intent = new Intent (Intent.action_view);                Intent.setdataandtype (Uri.fromfile (New File (Environment. getExternalStorageDirectory (), m_appnamestr)),        "Application/vnd.android.package-archive");    StartActivity (Intent); }}

Finally, the Common.java class:

Similar to a tool class, a lot of methods are written in here, after the download is complete, start to perform the installation operation!

public class Common {public static final string server_ip= "http://192.168.1.105/";p ublic static final string Server_addre ss=server_ip+ "try_downloadfile_progress_server/index.php";//Software update package address public static final String updatesoftaddress= server_ip+ "try_downloadfile_progress_server/update_pakage/baidu.apk";//Software update package address/** * Send a query request to the server, Returns the StringBuilder type data found * * @param ArrayList * <NameValuePair> VPS Post incoming parameter pairs * @return StringBuilder Bui Lder return results found * @throws Exception */public static StringBuilder post_to_server (list<namevaluepair> VPS) { Defaulthttpclient httpclient = new defaulthttpclient (); try {httpresponse response = null;//Create Httpost. Accessing the local server URL HttpPost Httpost = new HttpPost (server_address); StringBuilder builder = new StringBuilder (); Httpost.setentity (New Urlencodedformentity (VPS, HTTP. utf_8)); response = Httpclient.execute (httpost); Executes if (response.getentity () = null) {//If the server-side JSON is not written to, this is an exception and is not performed bufferedreader reader = new BufferedReader (New in Putstreamreader(Response.getentity (). GetContent ())); String s = reader.readline (); for (; s! = null; s = Reader.readline ()) {builder.append (s);}} return builder;} catch (Exception e) {//Todo:handle EXCEPTIONLOG.E ("msg", E.getmessage ()); return null;} finally {try { Httpclient.getconnectionmanager (). Shutdown ()//close connection//both of the methods of releasing the connection can be} catch (Exception e) {//TODO auto-generated catch BLOCKLOG.E ("msg", E.getmessage ());}}}        /** * Get software version number * @param context * @return */public static int Getvercode (context context) {int vercode =-1; try {//Note: "Com.example.try_downloadfile_progress" corresponds to Androidmanifest.xml in package= "..." section Vercode = Cont        Ext.getpackagemanager (). Getpackageinfo ("Com.example.try_downloadfile_progress", 0). Versioncode;        } catch (Namenotfoundexception e) {log.e ("msg", E.getmessage ());    } return Vercode; }/** * Gets the version name * @param context * @return */public static String Getvername (context context) {St Ring vername = ""; try {vername = Context.getpackagemanager (). Getpackageinfo ("Com.example.try_downloadfile_pr        Ogress ", 0). Versionname;        } catch (Namenotfoundexception e) {log.e ("msg", E.getmessage ());   } return vername; }

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