Android使用HttpUtils框架首页检查更新

检查本地Aapplication版本信息

/** * 获取本地版本号和版本信息 */public static String getVersionName(Context context) {  String versionName = "";  try {       ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);       versionName=context.getPackageManager().getPackageInfo(context.getPackageName(),0).versionName;   } catch (PackageManager.NameNotFoundException e) {        e.printStackTrace();    }    return versionName;}public static int getVersionCode(Context context) {   int versionCode = 0;   try {       versionCode=context.getPackageManager().getPackageInfo(context.getPackageName(),0).versionCode;   } catch (PackageManager.NameNotFoundException e) {            e.printStackTrace();   }    return versionCode;}

导入HttpUtils的jar包

下载Xutils.jar

流程图：

HttpUtils请求服务器版本信息

 //检查版本号    public void checkVersion() {        if (httpUtils == null)            httpUtils = new HttpUtils(2000);        httpUtils.send(HttpRequest.HttpMethod.GET, Constants.HOST + "/update.txt", new RequestCallBack<String>() {            @Override            public void onSuccess(ResponseInfo<String> responseInfo) {                //String json = responseInfo.result;                //处理响应结果                handleResponse(responseInfo.result);            }            @Override            public void onFailure(HttpException e, String s) {                e.printStackTrace();                ToastUtils.showSafeToast(SplashActivity.this, "网络异常,请检查你的网络。。。");                turnToMain();            }        });    }    //处理请求结果    public void handleResponse(String json) {        UpdateInfo updateInfo = new UpdateInfo();        try {            //获取更新信息            JSONObject jsonObject = new JSONObject(json);            updateInfo.msg = jsonObject.getString("msg");            updateInfo.version = jsonObject.getInt("version");            updateInfo.versionName = jsonObject.getString("versionName");            updateInfo.downloadUrl = jsonObject.getString("downloadUrl");            int localVersion = PackageUtils.getVersionCode(SplashActivity.this);            if (localVersion < updateInfo.version) {                //旧版本，是否更新 对话框提示                showDialog(updateInfo.msg, Constants.HOST + updateInfo.downloadUrl);            } else {                //新版本 跳转到主页面                turnToMain();            }        } catch (Exception e) {            e.printStackTrace();            turnToMain();        }    }    //下载apk    private void downloadApk(String downloadUrl) {        if (httpUtils == null)            httpUtils = new HttpUtils(2000);        final ProgressDialog pd = new ProgressDialog(SplashActivity.this);        pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);        pd.setTitle("下载中...");        String target = Environment.getDataDirectory().getAbsolutePath() + "/new.apk";        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {            target = Environment.getExternalStorageDirectory().getAbsolutePath() + "/new.apk";        }        final String apkPath = target;        boolean autoResume = false;//true：断点续传 如果下载完成再次下载会进入onFailure方法        httpUtils.download(downloadUrl, target, autoResume, new RequestCallBack<File>() {            @Override            public void onSuccess(ResponseInfo<File> responseInfo) {                //下载完成 掉用系统安装界面                installApk(apkPath);                pd.dismiss();            }            @Override            public void onFailure(HttpException e, String s) {                //下载失败                ToastUtils.showSafeToast(SplashActivity.this, "下载失败");                pd.dismiss();                turnToMain();            }            @Override            public void onLoading(long total, long current, boolean isUploading) {                pd.setMax((int) total);                int percent = (int) (current * 100f / total);                pd.setProgress(percent);            }        });    }

调用系统安装器安装apk

 private void installApk(String path) {        Intent intent = new Intent();        intent.setAction(Intent.ACTION_INSTALL_PACKAGE);        intent.addCategory(Intent.CATEGORY_DEFAULT);        String type = "application/vnd.android.package-archive";        intent.setDataAndType(Uri.parse("file://" + path), type);        //如果用户安装不用处理 如果用户不安装 跳转到主页面        startActivityForResult(intent, 0);   }

注解:[^note]:第一次写，不好之处还请各位指正，欢迎各位大神一起讨论交流与。欢迎界面以后可改用ViewPager，至于网络请求框架很多，LZ这里就不多说了。