Android implements app version update case

Androidmainfest.xml. Configure related permissions

<?XML version= "1.0" encoding= "Utf-8"?><Manifestxmlns:android= "Http://schemas.android.com/apk/res/android" Package= "Com.mytest.versionupdate"Android:versioncode= "1"Android:versionname= "1.0" >    <USES-SDKandroid:minsdkversion= "+"android:targetsdkversion= "+" />    <uses-permissionAndroid:name= "Android.permission.INTERNET"/>    <uses-permissionAndroid:name= "Android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>    <uses-permissionAndroid:name= "Android.permission.WRITE_EXTERNAL_STORAGE"/>    <ApplicationAndroid:allowbackup= "true"Android:icon= "@drawable/ic_launcher"Android:label= "@string/app_name"Android:theme= "@style/apptheme" >        <ActivityAndroid:name=". Mainactivity "Android:label= "@string/app_name" >            <Intent-filter>                <ActionAndroid:name= "Android.intent.action.MAIN" />                <categoryAndroid:name= "Android.intent.category.LAUNCHER" />            </Intent-filter>        </Activity>    </Application></Manifest>

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Main.xml,

<Relativelayoutxmlns: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"Tools:context= "Com.mytest.autoupdate.MainActivity" >    <TextViewAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:text= "@string/hello_world" /></Relativelayout>

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Downloadapk_progress.xml, customizing Download Progress view

<LinearLayoutxmlns: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"Tools:context= "Com.mytest.autoupdate.MainActivity" >    <ProgressBarAndroid:id= "@+id/download_progressbar"Android:layout_width= "Fill_parent"Android:layout_height= "Wrap_content"style= "? Android:attr/progressbarstylehorizontal"         /></LinearLayout>

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Call Automatic Updates in Mainactivity.java

Package Com.mytest.autoupdate;import Android.app.activity;import Android.os.bundle;import android.view.Menu;import Android.view.menuitem;public class Mainactivity extends Activity {    @Override    protected void OnCreate (Bundle Savedinstancestate) {        super.oncreate (savedinstancestate);        Setcontentview (r.layout.activity_main);                New Autoupdatemanager (this). Checkisneedupdate ();    }}

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Autoupdatemanager.java

Package Com.mytest.autoupdate;import Java.io.file;import Java.io.fileoutputstream;import java.io.IOException; Import Java.io.inputstream;import Java.net.httpurlconnection;import Java.net.malformedurlexception;import Java.net.url;import Org.json.jsonexception;import Org.json.jsonobject;import Org.json.jsontokener;import Android.app.alertdialog;import Android.app.alertdialog.builder;import Android.app.dialog;import Android.content.context;import Android.content.dialoginterface;import Android.content.intent;import Android.content.pm.packagemanager.namenotfoundexception;import Android.net.uri;import android.os.Environment; Import Android.os.handler;import Android.os.message;import Android.text.alteredcharsequence;import Android.util.log;import Android.view.layoutinflater;import Android.view.view;import Android.widget.ProgressBar;    Import Android.widget.toast;public class Autoupdatemanager {private final String Log_tag = "Autoupdatemanager";    Private context context; Public AutoupdatemAnager (Context context) {This.context = context;    }//Judge version update URL private final String Check_version__url = "Http://192.168.23.1:8080/testapp/version_json";            /** * Check if you need to update */public void Checkisneedupdate () {//Get version Information new Thread (new Runnable () { @Override public void Run () {//Get version information String Versionjson = GetVersionInfo ()                ; if (Versionjson! = NULL &&! "".                    Equals (Versionjson.trim ())) {Message msg = Versioninfohandler.obtainmessage ();                    Msg.obj = Versionjson;                Versioninfohandler.sendmessage (msg);        }}). Start (); Compare version if (!islastversion ()) {new Alertdialog.builder (context). Settitle ("hint"). Setmessage ("The software has an update, whether to download the update ？                        "). Setpositivebutton (" Update Now ", new Dialoginterface.onclicklistener () {@Override PublIC void OnClick (Dialoginterface dialog, int which) {//Show download progress bar Show                            Downloaddialog ();                            Download apk file Downloadapkfile (); Install APK//Todo}}). Setnegativebutton ("Next time", NULL)        . Create (). Show ();        } else {Toast.maketext (context, "Already the latest version", Toast.length_short). Show ();    }} private ProgressBar Download_progressbar;    Private Alertdialog Downloaddialog;    Private Boolean iscanceldownload = false;    Private final int download_state_fininsh = 1;    Private final int download_state_load = 0;    private int downloadcurprogress; Private Handler Downloadhandler = new Handler () {public void Handlemessage (Message msg) {switch (msg.a       RG1) {case DOWNLOAD_STATE_LOAD:download_progressbar.setProgress (downloadcurprogress);         Break                                Case DOWNLOAD_STATE_FININSH:downLoadDialog.dismiss ();                                INSTALLAPK ();            Break    }        }    };                private void Showdownloaddialog () {downloaddialog = new Alertdialog.builder (context). Settitle ("in Download") . Setnegativebutton ("Cancel", new Dialoginterface.onclicklistener () {@Override public                    void OnClick (Dialoginterface dialog, int which) {iscanceldownload = true;        }}). Create ();        View view = Layoutinflater.from (context). Inflate (r.layout.downloadapk_progress, NULL);        Downloaddialog.setview (view);        Download_progressbar = (ProgressBar) View.findviewbyid (R.id.download_progressbar);    Downloaddialog.show (); }/** * Download apk file */private void Downloadapkfile () {LOG.V (Log_tag, "downloadapkfile->" + Versiondo        Wnloadurl); New Thread (New Runnable () {@Override public void run () {try {if (E Nvironment.getexternalstoragestate (). Equals (environment.media_mounted)) {String Dirpath = environm                        Ent.getexternalstoragedirectory () + "/";                        Saveapkpath = Dirpath + "AutoUpdate";                        File File = new file (Saveapkpath);                        if (file.exists () = = False) {File.mkdir ();                        } saveapkfilename = "version" + Versioncode;                        File Apkfile = new file (saveapkpath,saveapkfilename);                        FileOutputStream fos = new FileOutputStream (apkfile);                        HttpURLConnection conn = (httpurlconnection) new URL (Versiondownloadurl). OpenConnection ();                        int fileSize = Conn.getcontentlength ();                 InputStream is = Conn.getinputstream ();       int len = 0;                        int count = 0;                        byte[] buff = new byte[1024];                            while (!iscanceldownload) {len = Is.read (buff); Calculate current Progress Count + = len;//log.v (log_tag, "downloadcurprogress->" +                            "Count:" +count+ ", FileSize:" +filesize); downloadcurprogress = (int) ((float) count/filesize);//LOG.V (Log_tag, "Downloadcurpro                            Gress-> "+downloadcurprogress);                            Message msg = Downloadhandler.obtainmessage ();                            MSG.ARG1 = Download_state_load;                            Downloadhandler.sendmessage (msg);  if (len<0) {Message MSG2= Downloadhandler.obtainmessage (); Msg2.arg1= Download_state_fininsh; //Note A new Message object must be sent Downloadhandler.sendmessage (MSG2);                            Break                        } fos.write (Buff, 0, Len);                    } is.close (); }} catch (Exception e) {//TODO auto-generated catch block e.prints                Tacktrace ();        }}). Start ();  }/** * is the latest version * * @return */Private Boolean islastversion () {try {int curver = Context.getpackagemanager (). Getpackageinfo ("Com.mytest.autoupdate",0). Versioncode;            if (Curver < Versioncode) {return true;         }} catch (Namenotfoundexception e) {//TODO auto-generated catch block E.printstacktrace ();    } return false;    }//Version information.    private int versioncode;    Private String Versionname;    Private String Versiondesc;    Private String Versiondownloadurl;    Private String Saveapkfilename; Private String saveapkpath;//apk save path private Handler Versioninfohandler= newHandler () {public void Handlemessage (Message msg) {String Versionjson= (String)Msg.obj; try {Jsontokener JT= newJsontokener (Versionjson); Jsonobject obj= (jsonobject)Jt.nextvalue (); Demo Data//{"Versioncode": 3, "Versionname": "TestApp", "desc": "added xx function", "Versiondownloadurl": "http://192.168 .23.1:8080/testapp/versionupdate.apk "} versionname= obj.getstring ("Versionname"); Versiondesc= obj.getstring ("Versiondesc"); Versiondownloadurl= obj.getstring ("Versiondownloadurl"); Versioncode= Obj.getint ("Versioncode"); log.v (Log_tag, Versionname + "," + Versioncode);            } catch (Jsonexception e) {//TODO auto-generated catch block E.printstacktrace ();    }        };    }; /** * Get version information */private String GetVersionInfo () {StringBuffer Jsonrst= newStringBuffer (); try {HttpURLConnection conn= (httpurlconnection)new URL (Check_version__url). OpenConnection ();            Conn.setrequestmethod ("GET"); InputStream is= Conn.getinputstream (); int Len= 0; byte[] Buffer= newbyte[1024]; while (Len= is.read (buffer))!=-1){jsonrst.append (new String (buffer, 0, Len, "UTF-8"));        } is.close ();        } catch (Exception e) {e.printstacktrace ();    } return jsonrst.tostring (); }/** * Install APK */private void installapk () {File file= newFile (saveapkpath+ "/" +saveapkfilename); if (file.exists ()==false) {            return; } Intent Intent= newIntent (); Uri URI= Uri.parse ("file://" +file.tostring ()); Intent.setdataandtype (URI, "application/vnd.android.package-archive");    Context.startactivity (Intent);    }; }

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Key points of knowledge:
1, handler and the use of the message;
2, the Use of custom dialog (in the download progress);
3. Download the file to SD.
4. Install apk file.
5, JSON network acquisition and parsing.

Android implements app version update case