Android项目之APK升级管理

APK升级采用DownloadManager类，它是系统提供的下载方法，支持断点续传、通知栏显示。

downloadManager = (DownloadManager) application.getSystemService(Context.DOWNLOAD_SERVICE);

DownloadManager.Request 用来执行下载任务

DownloadManager.Request request = new DownloadManager.Request(Uri.parse(newVersionInfo.getDownloadUrl()));request.setMimeType("application/vnd.android.package-archive");//设置文件类型  此参数为apk类型request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, apkName);//外部存储路径，文件名//request.setTitle(“Title”);设置下载中通知栏提示的标题//request.setDescription(“Description”);设置下载中通知栏提示的介绍//request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI);表示下载允许的网络类型//request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, apkName);//设置下载路径为系统的下载目录//request.setAllowedOverRoaming(true);允许漫游 默认true//request.addRequestHeader(String header, String value);请求头//request.setDestinationInExternalFilesDir(this,path, name); 上下文，路径，文件名downloadId = downloadManager.enqueue(request);downloadManager.remove(REFERENCE_1, REFERENCE_2, REFERENCE_3);//移除下载

DownloadManager.Query 用来查询下载任务的信息

DownloadManager.Query  query = new Query();     query.setFilterById(reference);     Cursor myDownload = downloadManager.query(query);     if (myDownload.moveToFirst()) {       int fileNameIdx =          myDownload.getColumnIndex(DownloadManager.COLUMN_LOCAL_FILENAME); //文件名      int fileUriIdx =          myDownload.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI); //文件uri      int fileSizeIdx =          myDownload.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES);//文件大小       int bytesDLIdx =          myDownload.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR);//文件下载大小    }     myDownload.close(); 

下载成功后的广播 DownloadManager.ACTION_DOWNLOAD_COMPLETE

class CompleteReceiver extends BroadcastReceiver {    @Override    public void onReceive(Context context, Intent intent) {        // get complete download id        long completeDownloadId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);        // to do here    }};

点击正在下载的notification将会发出广播：DownloadManager.ACTION_NOTIFICATION_CLICKED

文件下载成功后启动安装：

private void installApk(long downloadApkId) {        Intent install = new Intent(Intent.ACTION_VIEW);        Uri downloadFileUri = downloadManager.getUriForDownloadedFile(downloadApkId);        if (downloadFileUri != null) {            install.setDataAndType(downloadFileUri, "application/vnd.android.package-archive");            install.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);            getApplication().startActivity(install);        } else {            Log.e("DownloadManager", "download error");        }    }