android關於版本更新問題

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          在Android中，檢測版本更新是每個app很常見的功能，我們也嘗試簡單實現一下吧~
布局代碼這裡就不需要寫了，一個按鈕即可檢測更新，這裡我是以一個gson檔案作為樣本請求比對版本...
第一步解析資料：

//請求網路伺服器上的版本final String url="http://192.168.253.2:8080/gson/banbenwenjian.json"; HttpUtils utils=new HttpUtils();utils.configTimeout(5000);utils.send(HttpMethod.GET, url, new RequestCallBack<String>() {@Overridepublic void onFailure(HttpException arg0, String arg1) {// TODO Auto-generated method stub}@Overridepublic void onSuccess(ResponseInfo<String> arg0) {// TODO Auto-generated method stubmNetData = arg0.result;Gson gson=new Gson();banben = gson.fromJson(mNetData, Banben.class);mUrl1 = banben.getUrl();mName = banben.getName();mVersion = banben.getVersion();handler.sendEmptyMessage(0);}});

handler接受  通過構造方法將資料傳到UpdateManager類

private Handler handler=new Handler(){public void handleMessage(android.os.Message msg) {Log.d("u", mUrl1+mName+mVersion);UpdateManager manager = new UpdateManager(getActivity(),mUrl1,mName,mVersion);manager.checkUpdate();};};

-------------------------解析bean類------------擷取版本號碼  和名稱

public class Banben implements Serializable{private String version;private String name;private String url;public String getVersion() {return version;}public void setVersion(String version) {this.version = version;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getUrl() {return url;}public void setUrl(String url) {this.url = url;}@Overridepublic String toString() {return "Banben [version=" + version + ", name=" + name + ", url=" + url+ "]";}}

-----------------------------UpdateManager-------------------

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 java.util.ArrayList;import com.hao.happyshoppingapp.R;import com.seven.bean.Banben;import android.app.AlertDialog;import android.app.Dialog;import android.app.AlertDialog.Builder;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.DialogInterface.OnClickListener;import android.content.pm.PackageManager.NameNotFoundException;import android.net.Uri;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.widget.ProgressBar;import android.widget.Toast;public class UpdateManager {/* 下載中 */private static final int DOWNLOAD = 1;/* 下載結束 */private static final int DOWNLOAD_FINISH = 2;/* 下載儲存路徑 */private String mSavePath;/* 記錄進度條數量 */private int progress;/* 是否取消更新 */private boolean cancelUpdate = false;private Context mContext;/* 更新進度條 */private ProgressBar mProgress;private Banben banben;private Dialog mDownloadDialog;private String url1;private String name;private String version;private Handler mHandler = new Handler(){public void handleMessage(Message msg){switch (msg.what){// 正在下載case DOWNLOAD:// 設定進度條位置mProgress.setProgress(progress);break;case DOWNLOAD_FINISH:// 安裝檔案installApk();break;default:break;}};};public UpdateManager(Context mContext, String url1, String name,String version) {super();this.mContext = mContext;this.url1 = url1;this.name = name;this.version = version;}/** * 檢測軟體更新 */public void checkUpdate(){if (isUpdate()){showNoticeDialog();// 顯示提示對話方塊} else{Toast.makeText(mContext, R.string.soft_update_no, Toast.LENGTH_LONG).show();}}/** * 檢查軟體是否有更新版本 *  * @return */private boolean isUpdate(){// 擷取當前軟體版本int versionCode = getVersionCode(mContext);Log.d("versionCode", versionCode+"");if (null != name){int serviceCode = Integer.valueOf(version);// 版本判斷if (serviceCode > versionCode){return true;}}return false;}private void request_serverban() {// TODO Auto-generated method stubToast.makeText(mContext, "執行到了", 0).show();}/** * 擷取軟體版本號碼 *  * @param context * @return */private int getVersionCode(Context context){int versionCode = 0;try{// 擷取軟體版本號碼，對應AndroidManifest.xml下android:versionCodeversionCode = context.getPackageManager().getPackageInfo("com.hao.happyshoppingapp", 0).versionCode;} catch (NameNotFoundException e){e.printStackTrace();}return versionCode;}/** * 顯示軟體更新對話方塊 */private void showNoticeDialog(){// 構造對話方塊AlertDialog.Builder builder = new Builder(mContext);builder.setTitle(R.string.soft_update_title);builder.setMessage(R.string.soft_update_info);// 更新builder.setPositiveButton(R.string.soft_update_updatebtn, new OnClickListener(){@Overridepublic void onClick(DialogInterface dialog, int which){dialog.dismiss();// 顯示下載對話方塊showDownloadDialog();}});// 稍後更新builder.setNegativeButton(R.string.soft_update_later, new OnClickListener(){@Overridepublic void onClick(DialogInterface dialog, int which){dialog.dismiss();}});Dialog noticeDialog = builder.create();noticeDialog.show();}/** * 顯示軟體下載對話方塊 */private void showDownloadDialog(){// 構造軟體下載對話方塊AlertDialog.Builder builder = new Builder(mContext);builder.setTitle(R.string.soft_updating);// 給下載對話方塊增加進度條final LayoutInflater inflater = LayoutInflater.from(mContext);View v = inflater.inflate(R.layout.softupdate_progress, null);mProgress = (ProgressBar) v.findViewById(R.id.update_progress);builder.setView(v);// 取消更新builder.setNegativeButton(R.string.soft_update_cancel, new OnClickListener(){@Overridepublic void onClick(DialogInterface dialog, int which){dialog.dismiss();// 設定取消狀態cancelUpdate = true;}});mDownloadDialog = builder.create();mDownloadDialog.show();// 現在檔案downloadApk();}/** * 下載apk檔案 */private void downloadApk(){// 啟動新線程下載軟體new downloadApkThread().start();}/** * 下載檔案線程 *  * @author coolszy *@date 2012-4-26 *@blog http://blog.92coding.com */private class downloadApkThread extends Thread{@Overridepublic void run(){try{// 判斷SD卡是否存在，並且是否具有讀寫權限if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){// 獲得儲存卡的路徑String sdpath = Environment.getExternalStorageDirectory() + "/";mSavePath = sdpath + "download";URL url = new URL(url1);// 建立串連HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.connect();// 擷取檔案大小int length = conn.getContentLength();// 建立輸入資料流InputStream is = conn.getInputStream();File file = new File(mSavePath);// 判斷檔案目錄是否存在if (!file.exists()){file.mkdir();}File apkFile = new File(mSavePath, name);FileOutputStream fos = new FileOutputStream(apkFile);int count = 0;// 緩衝byte buf[] = new byte[1024];// 寫入到檔案中do{int numread = is.read(buf);count += numread;// 計算進度條位置progress = (int) (((float) count / length) * 100);// 更新進度mHandler.sendEmptyMessage(DOWNLOAD);if (numread <= 0){// 下載完成mHandler.sendEmptyMessage(DOWNLOAD_FINISH);break;}// 寫入檔案fos.write(buf, 0, numread);} while (!cancelUpdate);// 點擊取消就停止下載.fos.close();is.close();}} catch (MalformedURLException e){e.printStackTrace();} catch (IOException e){e.printStackTrace();}// 取消下載對話方塊顯示mDownloadDialog.dismiss();}};/** * 安裝APK檔案 */private void installApk(){File apkfile = new File(mSavePath, name);if (!apkfile.exists()){return;}// 通過Intent安裝APK檔案Intent i = new Intent(Intent.ACTION_VIEW);i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");mContext.startActivity(i);}}

重要方法在上面那個類都有注釋到  可以看一看 都是有用的一些方法~~

最後給大家展示一下伺服器上的gson檔案,我是用tomcat伺服器作為測試的，當然也可以隨你的意願了

{    "name": "HappyShopping",    "url": "http://192.168.253.2:8080/anzhuangbao/HappyShoppingApp.apk",    "version": 2}

android關於版本更新問題