Android 8.0版本更新下载

  关于8.0的一个一个apk的下载更新，由于做的软件是内部用的，所以之前8.0的还是很少，一直也不知道会出现问题。但是后来领导突然提出来了，所以就更新了一下。

  其实8.0和7.0相比其实就一个权限的添加。

<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />

  下面完整下载代码

    在res下的xml创建名字为provider_paths的文件

<?xml version="1.0" encoding="utf-8"?>
<paths 
    <external-path

        path="." name="files_path" />
</paths>

    在application下创建provider

    

<provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="${applicationId}.provider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_paths" />
        </provider>

    java代码

    拿取当前版本和服务器返回的版本想对比，如果低于服务器就开始下载

    以下是在fragment中做的下载动作。

    

//动态申请权限
private void quanxian(){
        RxPermissions.getInstance(getActivity())
                // 申请权限
                .request(Manifest.permission.WRITE_EXTERNAL_STORAGE)
                .subscribe(new Action1<Boolean>() {
                    @Override
                    public void call(Boolean granted) {
                        if(granted){
                            //请求成功
                            showNoticeDialog();

                        }else{
                            // 请求失败回收当前服务


                        }
                    }
                });

    }

//更新当前app版本
    private void showNoticeDialog() {
        // 更新
        AlertDialog.Builder dialog = new AlertDialog.Builder(getActivity());

        dialog.setTitle("检测到新版本，立即更新吗")
                .setMessage("检测到新版本，立即更新吗").setMessage("更新内容:\n")//更新内容根据拿取版本时候服务器返回的进行书写
                .setPositiveButton("更新", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                        Toast.makeText(getActivity(), "正在通知栏下载中", Toast.LENGTH_SHORT).show();

                        // 显示下载对话框
                        showDownloadDialog();
                    }
                });
       
            dialog.setNegativeButton("下次再说", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                }
            });
        



        dialog.setCancelable(false);
        dialog.show();
    }


 /**
     * 显示软件下载对话框
     */
    private void showDownloadDialog() {

        String downPath = http://xiaz.apk;//下载路径 根据服务器返回的apk存放路径
        //使用系统下载类
        mDownloadManager = (DownloadManager) getActivity().getSystemService(DOWNLOAD_SERVICE);
        Uri uri = Uri.parse(downPath);
        DownloadManager.Request request = new DownloadManager.Request(uri);
        request.setAllowedOverRoaming(false);

        //创建目录下载
        request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "下载.apk");
        // 把id保存好，在接收者里面要用
        downloadId = mDownloadManager.enqueue(request);
        //设置允许使用的网络类型，这里是移动网络和wifi都可以
        request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_MOBILE | DownloadManager.Request.NETWORK_WIFI);
        //机型适配
        request.setMimeType("application/vnd.android.package-archive");
        //通知栏显示
        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
        request.setTitle("下载");
        request.setDescription("正在下载中...");
        request.setVisibleInDownloadsUi(true);
        getActivity().registerReceiver(mReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
    }



private BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            checkStatus();
        }
    };


/**
     * 检查下载状态
     */
    private void checkStatus() {
        DownloadManager.Query query = new DownloadManager.Query();
        query.setFilterById(downloadId);
        Cursor cursor = mDownloadManager.query(query);
        if (cursor.moveToFirst()) {
            int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
            switch (status) {
                //下载暂停
                case DownloadManager.STATUS_PAUSED:
                    break;
                //下载延迟
                case DownloadManager.STATUS_PENDING:
                    break;
                //正在下载
                case DownloadManager.STATUS_RUNNING:
                    break;
                //下载完成
                case DownloadManager.STATUS_SUCCESSFUL:
                    installAPK();
                    break;
                //下载失败
                case DownloadManager.STATUS_FAILED:
                    Toast.makeText(getActivity(), "下载失败", Toast.LENGTH_SHORT).show();
                    break;
            }
        }
        cursor.close();
    }

    /**
     * 7.0兼容
     */
    private void installAPK() {
        File apkFile =
                new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), "下载.apk");
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            Uri apkUri = FileProvider.getUriForFile(getActivity(), getActivity().getPackageName() + ".provider", apkFile);
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            intent.setDataAndType(apkUri, "application/vnd.android.package-archive");
        } else {
            intent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive");
        }
        getActivity().startActivity(intent);
    }