Android automatically updates the software version

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 android. app. AlertDialog;

Import android. app. AlertDialog. Builder;

Import android. app. Dialog;

Import android. content. Context;

Import android. content. DialogInterface;

Import android. content. DialogInterface. OnClickListener;

Import android. content. Intent;

Import android.net. Uri;

Import android. OS. Handler;

Import android. OS. Message;

Import android. util. Log;

Import android. view. LayoutInflater;

Import android. view. View;

Import android. widget. ProgressBar;

Public class UpdateManager {

Private Context mContext;

Private final String updateMsg = ", there is a new version. Do you want to update it! "; // Download message prompt

Private Dialog noticeDialog; // download prompt Dialog box

Private Dialog downloadDialog; // download progress Dialog box

Private ProgressBar mProgressBar; // progress bar

Private Boolean interceptFlag = false; // indicates whether the user cancels the download.

Private Thread downloadApkThread = null; // download Thread

Private final String apkUrl = "http://www.xxx/xxx.apk"; // URL of the apk

Private final String savePath = "/sdcard/UpdateDemo/"; // path of the downloaded apk

Private final String saveFileName = savePath + "xxx.apk"; // The downloaded apk file.

Private int progress = 0; // download progress

Private final int DOWNLOAD_ING = 1; // The flag is being downloaded.

Private final int DOWNLOAD_OVER = 2; // indicates that the download is complete.

Private final String TAG = "version Update ";

// Log printing label

Private Handler mhandler = new Handler () {// update the UI handler

@ Override

Public void handleMessage (Message msg ){

Super. handleMessage (msg );

Switch (msg. what ){

Case DOWNLOAD_ING:

// Update the progress bar

MProgressBar. setProgress (progress );

Break;

Case DOWNLOAD_OVER:

DownloadDialog. dismiss ();

InstallApk ();

// Install

Break;

Default:

Break;

}

}

};

/*

* Constructor

*/

Public UpdateManager (Context context ){

This. mContext = context;

}

/*

* Check whether updates are required. Compare the specific xml version.

*/

Public void checkUpdate (){

// Go to the server to check whether the software has a new version

// If yes

ShowNoticeDialog ();

}

/*

* The version update dialog box is displayed.

*/

Private void showNoticeDialog (){

AlertDialog. Builder builder = new Builder (mContext );

Builder. setTitle ("version Update ");

Builder. setMessage (updateMsg );

Builder. setPositiveButton ("Update", new OnClickListener (){

Public void onClick (DialogInterface dialog, int which ){

NoticeDialog. dismiss ();

ShowDownloadDialog ();

}

});

Builder. setNegativeButton ("later", new OnClickListener (){

Public void onClick (DialogInterface dialog, int which ){

NoticeDialog. dismiss ();

}

});

NoticeDialog = builder. create ();

NoticeDialog. show ();

}

/*

* The download progress dialog box is displayed.

*/

Private void showDownloadDialog (){

AlertDialog. Builder builder = new Builder (mContext );

Builder. setTitle ("Software Update ");

Final LayoutInflater inflater = LayoutInflater. from (mContext );

View v = inflater. inflate (R. layout. progress, null );

MProgressBar = (ProgressBar) v. findViewById (R. id. updateProgress );

Builder. setView (v );

Builder. setNegativeButton ("cancel", new OnClickListener (){

Public void onClick (DialogInterface dialog, int which ){

DownloadDialog. dismiss ();

InterceptFlag = true;

}

});

DownloadDialog = builder. create ();

DownloadDialog. show ();

DownloadLatestVersionApk ();

}

/*

* Download the latest apk File

*/

Private void downloadLatestVersionApk (){

DownloadApkThread = new Thread (downloadApkRunnable );

DownloadApkThread. start ();

}

// Anonymous internal class, apk File Download thread

Private Runnable downloadApkRunnable = new Runnable (){

Public void run (){

Try {

URL url = new URL (apkUrl );

HttpURLConnection conn = (HttpURLConnection) url

. OpenConnection ();

Conn. setConnectTimeout (5*1000 );

Conn. connect ();

Int length = conn. getContentLength ();

Log. e (TAG, "Total Bytes:" + length );

InputStream is = conn. getInputStream ();

File file = new File (savePath );

If (! File. exists ()){

File. mkdir ();

}

File apkFile = new File (saveFileName );

FileOutputStream out = new FileOutputStream (apkFile );

Int count = 0;

Int readnum = 0;

Byte [] buffer = new byte [1024];

Do {

Readnum = is. read (buffer );

Count + = readnum;

Progress = (int) (float) count/length) * 100 );

Log. e (TAG, "download progress" + progress );

Mhandler. sendEmptyMessage (DOWNLOAD_ING );

If (readnum <= 0 ){

// Download ends

Mhandler. sendEmptyMessage (DOWNLOAD_OVER );

Break;

}

Out. write (buffer, 0, readnum );

} While (! InterceptFlag );

Is. close ();

Out. close ();

} Catch (MalformedURLException e ){

E. printStackTrace ();

} Catch (IOException e ){

E. printStackTrace ();

}

}

};

/*

* Install the downloaded apk File

*/

Private void installApk (){

File file = new File (saveFileName );

If (! File. exists ()){

Return;

}

Intent intent = new Intent (Intent. ACTION_VIEW );

Intent. setDataAndType (Uri. parse ("file: //" + file. toString (), "application/vnd. android. package-archive ");

MContext. startActivity (intent );

}

}