Android(安卓)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。

//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() {            @Override            public void onSuccess(String result) {                Log.e("CheckVersionActivity", "CheckVersionActivity onSuccess()" + result);                processData(result, activity, isToastNoVersion);            }            @Override            public void onError(Throwable ex, boolean isOnCallback) {            }            @Override            public void onCancelled(CancelledException cex) {            }            @Override            public 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() {                @Override                public void onClick(DialogInterface dialog, int which) {                    //更新                    downloadApk(checkVersionBean.getDownloadUrl(), saveSDPath, activity);                }            });        } else {            alertDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "取消", new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface dialog, int which) {                }            });            alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, "更新", new DialogInterface.OnClickListener() {                @Override                public 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() {            @Override            public void onWaiting() {            }            @Override            public void onStarted() {            }            @Override            public 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));            }            @Override            public void onSuccess(File result) {                Toast.makeText(NiceyooApplication.getNiceyooApp(), "下载完成", Toast.LENGTH_SHORT).show();                progressDialog.dismiss();                installApk(activity, result);            }            @Override            public 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();            }            @Override            public void onCancelled(CancelledException cex) {            }            @Override            public 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…

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));    }    @Override    public int onStartCommand(Intent intent, int flags, int startId) {        // 调用下载        initDownManager();        return super.onStartCommand(intent, flags, startId);    }    @Override    public IBinder onBind(Intent intent) {        return null;    }    @Override    public void onDestroy() {        // 注销下载广播        if (receiver != null)            unregisterReceiver(receiver);        super.onDestroy();    }    // 接受下载完成后的intent    class DownloadCompleteReceiver extends BroadcastReceiver {        @Override        public 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id                long downId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);                //自动安装apk                if (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apk        protected 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);        }    }}

参考：http://blog.csdn.net/rodulf/article/details/51706788#comments

上边代码不是server下载

下载demo

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