Android App在線更新的代碼

import java.io.File;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.net.URL;

import java.net.URLConnection;

import android.app.Activity;

import android.app.AlertDialog;

import android.app.ProgressDialog;

import android.content.Context;

import android.content.DialogInterface;

import android.content.Intent;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager.NameNotFoundException;

import android.net.ConnectivityManager;

import android.net.NetworkInfo;

import android.net.Uri;

import android.util.Log;

import android.webkit.URLUtil;

import com.hiyo.game.pdk.activity.R;

/**


Android AutoUpdate.  

lazybone/2010.08.20  

1.Set apkUrl.  

2.check().  

3.add delFile() method in resume()\onPause().

*/

public class MyAutoUpdate {

 public Activity activity = null;

 public int versionCode = 0;

 public String versionName = "";

 private static final String TAG = "AutoUpdate";

 private String currentFilePath = "";

 private String currentTempFilePath = "";

 private String fileEx = "";

 private String fileNa = "";

 private String strURL = "http://127.0.0.1:81/ApiDemos.apk";

 private ProgressDialog dialog;

 public MyAutoUpdate(Activity activity) {   
 this.activity = activity;   
 getCurrentVersion();   

 }

 public void check() {   
 if (isNetworkAvailable(this.activity) == false) {   
     return;   
 }   
 if (true) {// Check version.   
     showUpdateDialog();   
 }   

 }

 public static boolean isNetworkAvailable(Context ctx) {   
 try {   
     ConnectivityManager cm = (ConnectivityManager) ctx   
             .getSystemService(Context.CONNECTIVITY_SERVICE);   
     NetworkInfo info = cm.getActiveNetworkInfo();   
     return (info != null && info.isConnected());   
 } catch (Exception e) {   
     e.printStackTrace();   
     return false;   
 }   

 }

 public void showUpdateDialog() {   
 @SuppressWarnings("unused")   
 AlertDialog alert = new AlertDialog.Builder(this.activity)   
         .setTitle("Title")   
         .setIcon(R.drawable.icon)   
         .setMessage("Update or not?")   
         .setPositiveButton("Update",   
                 new DialogInterface.OnClickListener() {   
                     public void onClick(DialogInterface dialog,   
                             int which) {   
                         downloadTheFile(strURL);   
                         showWaitDialog();   
                     }   
                 })   
         .setNegativeButton("Cancel",   
                 new DialogInterface.OnClickListener() {   
                     public void onClick(DialogInterface dialog,   
                             int which) {   
                         dialog.cancel();   
                     }   
                 }).show();   

 }

 public void showWaitDialog() {   
 dialog = new ProgressDialog(activity);   
 dialog.setMessage("Waitting for update...");   
 dialog.setIndeterminate(true);   
 dialog.setCancelable(true);   
 dialog.show();   

 }

 public void getCurrentVersion() {   
 try {   
     PackageInfo info = activity.getPackageManager().getPackageInfo(   
             activity.getPackageName(), 0);   
     this.versionCode = info.versionCode;   
     this.versionName = info.versionName;   
 } catch (NameNotFoundException e) {   
     e.printStackTrace();   
 }   

 }

 private void downloadTheFile(final String strPath) {   
 fileEx = strURL.substring(strURL.lastIndexOf(".") + 1, strURL.length())   
         .toLowerCase();   
 fileNa = strURL.substring(strURL.lastIndexOf("/") + 1,   
         strURL.lastIndexOf("."));   
 try {   
     if (strPath.equals(currentFilePath)) {   
         doDownloadTheFile(strPath);   
     }   
     currentFilePath = strPath;   
     Runnable r = new Runnable() {   
         public void run() {   
             try {   
                 doDownloadTheFile(strPath);   
             } catch (Exception e) {   
                 Log.e(TAG, e.getMessage(), e);   
             }   
         }   
     };   
     new Thread(r).start();   
 } catch (Exception e) {   
     e.printStackTrace();   
 }   

 }

 private void doDownloadTheFile(String strPath) throws Exception {   
 Log.i(TAG, "getDataSource()");   
 if (!URLUtil.isNetworkUrl(strPath)) {   
     Log.i(TAG, "getDataSource() It's a wrong URL!");   
 } else {   
     URL myURL = new URL(strPath);   
     URLConnection conn = myURL.openConnection();   
     conn.connect();   
     InputStream is = conn.getInputStream();   
     if (is == null) {   
         throw new RuntimeException("stream is null");   
     }   
     File myTempFile = File.createTempFile(fileNa, "." + fileEx);   
     currentTempFilePath = myTempFile.getAbsolutePath();   
     FileOutputStream fos = new FileOutputStream(myTempFile);   
     byte buf[] = new byte[128];   
     do {   
         int numread = is.read(buf);   
         if (numread <= 0) {   
             break;   
         }   
         fos.write(buf, 0, numread);   
     } while (true);   
     Log.i(TAG, "getDataSource() Download  ok...");   
     dialog.cancel();   
     dialog.dismiss();   
     openFile(myTempFile);   
     try {   
         is.close();   
     } catch (Exception ex) {   
         Log.e(TAG, "getDataSource() error: " + ex.getMessage(), ex);   
     }   
 }   

 }

 private void openFile(File f) {   
 Intent intent = new Intent();   
 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);   
 intent.setAction(android.content.Intent.ACTION_VIEW);   
 String type = getMIMEType(f);   
 intent.setDataAndType(Uri.fromFile(f), type);   
 activity.startActivity(intent);   

 }

 public void delFile() {   
 Log.i(TAG, "The TempFile(" + currentTempFilePath + ") was deleted.");   
 File myFile = new File(currentTempFilePath);   
 if (myFile.exists()) {   
     myFile.delete();   
 }   

 }

 private String getMIMEType(File f) {   
 String type = "";   
 String fName = f.getName();   
 String end = fName   
         .substring(fName.lastIndexOf(".") + 1, fName.length())   
         .toLowerCase();   
 if (end.equals("m4a") || end.equals("mp3") || end.equals("mid")   
         || end.equals("xmf") || end.equals("ogg") || end.equals("wav")) {   
     type = "audio";   
 } else if (end.equals("3gp") || end.equals("mp4")) {   
     type = "video";   
 } else if (end.equals("jpg") || end.equals("gif") || end.equals("png")   
         || end.equals("jpeg") || end.equals("bmp")) {   
     type = "image";   
 } else if (end.equals("apk")) {   
     type = "application/vnd.android.package-archive";   
 } else {   
     type = "*";   
 }   
 if (end.equals("apk")) {   
 } else {   
     type += "/*";   
 }   
 return type;   

 }

}  </pre>