String url = "http://api.fir.im/apps/latest/58c2060c959d690ca80000ab";OkHttpUtils.get().url(url).addParams("api_token", "76781495449213ac787a0fd3b9923a2b").build().execute(new StringCallback(){@Overridepublic void onError(Call call, Exception e, int id) {Log.d("err===========",e + "");}@Overridepublic void onResponse(String response, int id) {Log.d("ok===========",response);Gson gson = new Gson();CheckBean bean = gson.fromJson(response,CheckBean.class);if (getVersionCode(mContext) < bean.getVersion()){showSimpleDialog(bean.getChangelog(),bean.getInstall_url());}else {Toast.makeText(mContext,"暂无更新",Toast.LENGTH_SHORT).show();}}});

 public static int getVersionCode(Context mContext) {if (mContext != null) {try {return mContext.getPackageManager().getPackageInfo(mContext.getPackageName(), 0).versionCode;} catch (PackageManager.NameNotFoundException ignored) {}}return 0;}

OkHttpUtils//
                .get()//
                .url(url)//
                .build()//
                .execute(new FileCallBack(Environment.getExternalStorageDirectory().getAbsolutePath(), "shzs.apk") {@Overridepublic void onError(Call call, Exception e, int id) {Log.d("err=======",e + "");}@Overridepublic void onResponse(File response, int id) {Log.d("ok==========",response.toString());installAPK(response);}@Overridepublic void inProgress(float progress, long total, int id) {Log.d("pro==========",progress + "");super.inProgress(progress, total, id);}});

private void installAPK(File file) {if (!file.exists()) return;Intent intent = new Intent(Intent.ACTION_VIEW);Uri uri = Uri.parse("file://" + file.toString());intent.setDataAndType(uri, "application/vnd.android.package-archive");//在服务中开启activity必须设置flag,
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);mContext.startActivity(intent);}