Android 检查版本更新 Server后台下载

问题来了，平时开发应用也许你会遇到这种场景：应用启动检查服务器版本，若大于当前版本，则要从网络上下载APK文件，并在Activity上展示进度条。

版本更新，无非是下载apk文件，安装apk。

这里写图片描述

//其中用到 Xutils

ublic class CheckVersionUtils {private static CheckVersionUtils mCheckVersionUtils;private CheckVersionUtils() {}public static CheckVersionUtils getInstance() {if (mCheckVersionUtils == null) {mCheckVersionUtils = new CheckVersionUtils();}return mCheckVersionUtils;}/*** 访问网络检查版本号码** @param isToastNoVersion 是否弹出"当前版本已为最新版本"的Toast* @param activity         弹窗需要的依赖的Activity*/public void checkVersionToServer(final boolean isToastNoVersion, final Activity activity) {x.http().get(new RequestParams(ConstantValue.CHECK_VERSION_JSON_URL), new Callback.CommonCallback<String>() {@Overridepublic void onSuccess(String result) {Log.e("CheckVersionActivity", "CheckVersionActivity onSuccess()" + result);processData(result, activity, isToastNoVersion);}@Overridepublic void onError(Throwable ex, boolean isOnCallback) {}@Overridepublic void onCancelled(CancelledException cex) {}@Overridepublic void onFinished() {}});}/*** 返回版本号*/private int getVersionCode() {return BuildConfig.VERSION_CODE;}/*** 解析JSON** @param json* @param isToastNoVersion*/private void processData(String json, Activity activity, boolean isToastNoVersion) {Gson gson = new Gson();CheckVersionBean checkVersionBean = gson.fromJson(json, CheckVersionBean.class);/*** 保存在手机的位置*/String saveSDPath = EXB_SD_PATH_APK + checkVersionBean.getFileName();//判断是否需要更新if (getVersionCode() < checkVersionBean.getVersionCode()) {showUpdateDialog(checkVersionBean, saveSDPath, activity);} else {if (isToastNoVersion) {//不更新Toast.makeText(activity, "当前版本已为最新版本", Toast.LENGTH_SHORT).show();}}}/*** 显示更新对话框** @param checkVersionBean*/private void showUpdateDialog(final CheckVersionBean checkVersionBean, final String saveSDPath, final Activity activity) {//创建文件,判断是否存在AlertDialog.Builder builder = new AlertDialog.Builder(activity);AlertDialog alertDialog = builder.create();//更新描述信息String updateLog = checkVersionBean.getUpdateLog();if (TextUtils.isEmpty(updateLog)) {updateLog = "新版本，欢迎更新";}//版本名称String versionName = checkVersionBean.getVersionName();if (TextUtils.isEmpty(versionName)) {versionName = "1.1";}alertDialog.setTitle("新版本" + versionName);alertDialog.setMessage(updateLog);//判断是否要强制更新if (checkVersionBean.getIsForceUpdate() == 1) {//强制更新//设置外部点了没有效果alertDialog.setCanceledOnTouchOutside(false);//禁用返回键alertDialog.setCancelable(false);alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, "更新", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {//更新downloadApk(checkVersionBean.getDownloadUrl(), saveSDPath, activity);}});} else {alertDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {}});alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, "更新", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {//更新downloadApk(checkVersionBean.getDownloadUrl(), saveSDPath, activity);}});}alertDialog.show();}/*** 下载apk** @param downurl*/private void downloadApk(String downurl, String path, final Activity activity) {final ProgressDialog progressDialog = new ProgressDialog(activity);RequestParams requestParams = new RequestParams(downurl);requestParams.setSaveFilePath(path);x.http().get(requestParams, new Callback.ProgressCallback<File>() {@Overridepublic void onWaiting() {}@Overridepublic void onStarted() {}@Overridepublic void onLoading(long total, long current, boolean isDownloading) {progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);progressDialog.setMessage("拼命下载中...");progressDialog.show();progressDialog.setMax(100);double fcurrent = current;progressDialog.setProgress((int) ((fcurrent / total) * 100));}@Overridepublic void onSuccess(File result) {Toast.makeText(NiceyooApplication.getNiceyooApp(), "下载完成", Toast.LENGTH_SHORT).show();progressDialog.dismiss();installApk(activity, result);}@Overridepublic void onError(Throwable ex, boolean isOnCallback) {ex.printStackTrace();Toast.makeText(NiceyooApplication.getNiceyooApp(), "下载失败，请检查网络和SD卡", Toast.LENGTH_SHORT).show();progressDialog.dismiss();}@Overridepublic void onCancelled(CancelledException cex) {}@Overridepublic void onFinished() {}});}/*** 安装对应apk** @param activity* @param file     安装文件*/private void installApk(Activity activity, File file) {//系统应用界面,源码,安装apk入口Intent intent = new Intent("android.intent.action.VIEW");intent.addCategory("android.intent.category.DEFAULT");//设置安装的类型intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");activity.startActivityForResult(intent, ConstantValue.INSTALL_NEW_VERSION_SUCCESS);}
}

上边代码不是server下载

为什么要用server下载呢？因为有可能你需要更新的这个Activity要求是可以转屏的。那么在转屏时Actvitiy会重启，如何保证下载的进度条能正确展示进度呢？当然是用server下载了…

这里写图片描述

public class UpdateService extends Service {public UpdateService() {}/*** 安卓系统下载类**/DownloadManager manager;/*** 接收下载完的广播**/DownloadCompleteReceiver receiver;/*** 初始化下载器**/private void initDownManager() {manager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);receiver = new DownloadCompleteReceiver();//设置下载地址DownloadManager.Request down = new DownloadManager.Request(//     百度音乐Uri.parse("http://gdown.baidu.com/data/wisegame/fd84b7f6746f0b18/baiduyinyue_4802.apk"));//    乐视体育// Uri.parse("http://122.228.237.132/apk.r1.market.hiapk.com/data/upload/apkres/2016/6_12/16/com.lesports.glivesports_040405.apk"));// 设置允许使用的网络类型，这里是移动网络和wifi都可以down.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_MOBILE | DownloadManager.Request.NETWORK_WIFI);// 下载时，通知栏显示途中if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {down.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE);}// 显示下载界面down.setVisibleInDownloadsUi(true);// 设置下载后文件存放的位置down.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, "leshi.apk");// 将下载请求放入队列manager.enqueue(down);//注册下载广播registerReceiver(receiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));}@Overridepublic int onStartCommand(Intent intent, int flags, int startId) {// 调用下载initDownManager();return super.onStartCommand(intent, flags, startId);}@Overridepublic IBinder onBind(Intent intent) {return null;}@Overridepublic void onDestroy() {// 注销下载广播if (receiver != null)unregisterReceiver(receiver);super.onDestroy();}// 接受下载完成后的intentclass DownloadCompleteReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {//判断是否下载完成的广播if (intent.getAction().equals(DownloadManager.ACTION_DOWNLOAD_COMPLETE)) {//获取下载的文件idlong downId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);//自动安装apkif (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {Uri uriForDownloadedFile = manager.getUriForDownloadedFile(downId);Log.d("kodulf", "uri=" + uriForDownloadedFile);installApkNew(uriForDownloadedFile);}//停止服务并关闭广播UpdateService.this.stopSelf();}}//安装apkprotected void installApkNew(Uri uri) {Intent intent = new Intent();//执行动作intent.setAction(Intent.ACTION_VIEW);//执行的数据类型intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);intent.setDataAndType(uri, "application/vnd.android.package-archive");//不加下面这句话是可以的，查考的里面说如果不加上这句的话在apk安装完成之后点击单开会崩溃// android.os.Process.killProcess(android.os.Process.myPid());startActivity(intent);}}
}