FileProvider的使用及应用更新时提示：解析包出错、失败等问题

private void initDownManager() {
        LogUtil.d(TAG, "initDownManager");
        manager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
        receiver = new DownloadCompleteReceiver();
        //设置下载地址
        DownloadManager.Request down = new DownloadManager.Request(Uri.parse(url));
        // 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);
        down.setAllowedOverRoaming(false);
        MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
        String mimeString = mimeTypeMap.getMimeTypeFromExtension(MimeTypeMap.getFileExtensionFromUrl(url));
        down.setMimeType(mimeString);
        // 下载时，通知栏显示途中
        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.setDestinationInExternalPublicDir(DOWNLOADPATH, "jingye.apk");
        down.setTitle("敬业升级");
        // 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));
    }

    public int onStartCommand(Intent intent, int flags, int startId) {
        LogUtil.d(TAG, "onStartCommand");
        url = intent.getStringExtra("downloadurl");
        String path = Environment.getExternalStorageDirectory().getAbsolutePath() + DOWNLOADPATH + "jingye.apk";
        File file = new File(path);
        if (file.exists()) {
            file.delete();
        }
        try {
            // 调用下载
            initDownManager();
            Toast.makeText(getApplicationContext(), "升级中，可以在通知栏查看进度", Toast.LENGTH_SHORT).show();
        } catch (Exception e) {
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), "下载失败", Toast.LENGTH_SHORT).show();
        }
        return Service.START_NOT_STICKY;
    }

  public void install(Context context) {
            File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) ,"jingye.apk");
            Intent intent = new Intent(Intent.ACTION_VIEW);
            //参数1 上下文, 参数2 Provider主机地址 和配置文件中保持一致   参数3  共享的文件
            Uri apkUri =
                    FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID+".fileprovider",file);

            intent.addCategory("android.intent.category.DEFAULT");
            // 由于没有在Activity环境下启动Activity,设置下面的标签
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            //添加这一句表示对目标应用临时授权该Uri所代表的文件
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            intent.setDataAndType(apkUri, "application/vnd.android.package-archive");

            LogUtil.d(TAG, "install -apkUri:"+apkUri);
            context.startActivity(intent);

        }