android关于版本更新问题

          在Android中，检测版本更新是每个app很常见的功能，我们也尝试简单实现一下吧~

布局代码这里就不需要写了，一个按钮即可检测更新，这里我是以一个gson文件作为示例请求比对版本...

第一步解析数据：

//请求网络服务器上的版本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  通过构造方法将数据传到UpdateManager类

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类------------

获取版本号  下载地址和名称

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 {/* 下载中 */private static final int DOWNLOAD = 1;/* 下载结束 */private static final int DOWNLOAD_FINISH = 2;/* 下载保存路径 */private String mSavePath;/* 记录进度条数量 */private int progress;/* 是否取消更新 */private boolean cancelUpdate = false;private Context mContext;/* 更新进度条 */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){// 正在下载case DOWNLOAD:// 设置进度条位置mProgress.setProgress(progress);break;case DOWNLOAD_FINISH:// 安装文件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;}/** * 检测软件更新 */public void checkUpdate(){if (isUpdate()){showNoticeDialog();// 显示提示对话框} else{Toast.makeText(mContext, R.string.soft_update_no, Toast.LENGTH_LONG).show();}}/** * 检查软件是否有更新版本 *  * @return */private boolean isUpdate(){// 获取当前软件版本int versionCode = getVersionCode(mContext);Log.d("versionCode", versionCode+"");if (null != name){int serviceCode = Integer.valueOf(version);// 版本判断if (serviceCode > versionCode){return true;}}return false;}private void request_serverban() {// TODO Auto-generated method stubToast.makeText(mContext, "执行到了", 0).show();}/** * 获取软件版本号 *  * @param context * @return */private int getVersionCode(Context context){int versionCode = 0;try{// 获取软件版本号，对应AndroidManifest.xml下android:versionCodeversionCode = context.getPackageManager().getPackageInfo("com.hao.happyshoppingapp", 0).versionCode;} catch (NameNotFoundException e){e.printStackTrace();}return versionCode;}/** * 显示软件更新对话框 */private void showNoticeDialog(){// 构造对话框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();// 显示下载对话框showDownloadDialog();}});// 稍后更新builder.setNegativeButton(R.string.soft_update_later, new OnClickListener(){@Overridepublic void onClick(DialogInterface dialog, int which){dialog.dismiss();}});Dialog noticeDialog = builder.create();noticeDialog.show();}/** * 显示软件下载对话框 */private void showDownloadDialog(){// 构造软件下载对话框AlertDialog.Builder builder = new Builder(mContext);builder.setTitle(R.string.soft_updating);// 给下载对话框增加进度条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();// 设置取消状态cancelUpdate = true;}});mDownloadDialog = builder.create();mDownloadDialog.show();// 现在文件downloadApk();}/** * 下载apk文件 */private void downloadApk(){// 启动新线程下载软件new downloadApkThread().start();}/** * 下载文件线程 *  * @author coolszy *@date 2012-4-26 *@blog http://blog.92coding.com */private class downloadApkThread extends Thread{@Overridepublic void run(){try{// 判断SD卡是否存在，并且是否具有读写权限if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){// 获得存储卡的路径String sdpath = Environment.getExternalStorageDirectory() + "/";mSavePath = sdpath + "download";URL url = new URL(url1);// 创建连接HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.connect();// 获取文件大小int length = conn.getContentLength();// 创建输入流InputStream is = conn.getInputStream();File file = new File(mSavePath);// 判断文件目录是否存在if (!file.exists()){file.mkdir();}File apkFile = new File(mSavePath, name);FileOutputStream fos = new FileOutputStream(apkFile);int count = 0;// 缓存byte buf[] = new byte[1024];// 写入到文件中do{int numread = is.read(buf);count += numread;// 计算进度条位置progress = (int) (((float) count / length) * 100);// 更新进度mHandler.sendEmptyMessage(DOWNLOAD);if (numread <= 0){// 下载完成mHandler.sendEmptyMessage(DOWNLOAD_FINISH);break;}// 写入文件fos.write(buf, 0, numread);} while (!cancelUpdate);// 点击取消就停止下载.fos.close();is.close();}} catch (MalformedURLException e){e.printStackTrace();} catch (IOException e){e.printStackTrace();}// 取消下载对话框显示mDownloadDialog.dismiss();}};/** * 安装APK文件 */private void installApk(){File apkfile = new File(mSavePath, name);if (!apkfile.exists()){return;}// 通过Intent安装APK文件Intent i = new Intent(Intent.ACTION_VIEW);i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");mContext.startActivity(i);}}

重要方法在上面那个类都有注释到  可以看一看 都是有用的一些方法~~

//资源分享

string.xml

    <string name="soft_update_no">已经是最新版本</string>    <string name="soft_update_title">软件更新</string>    <string name="soft_update_info">检测到新版本，立即更新吗</string>    <string name="soft_update_updatebtn">更新</string>    <string name="soft_update_later">稍后更新</string>    <string name="soft_updating">正在更新</string>    <string name="soft_update_cancel">取消</string>

//进度条布局

-----------softupdate_progress.xml--------------

<?xml version="1.0" encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="wrap_content"><ProgressBarandroid:id="@+id/update_progress"android:layout_width="fill_parent"android:layout_height="wrap_content"style="?android:attr/progressBarStyleHorizontal" /></LinearLayout>

最后给大家展示一下服务器上的gson文件,我是用tomcat服务器作为测试的，当然也可以随你的意愿了

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

哦！！！忘记添加权限了~

     <uses-permission android:name="android.permission.INTERNET" />    <!-- 写入扩展存储，向扩展卡写入数据，用于写入 -->    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" >    </uses-permission>    <!-- SD卡读取权限，用户写入离线定位数据 -->    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" >    </uses-permission>