我正在使用DownloadManager
下载我的App文件。
如果我第二次将一个网址放入DownloadManager
,它会下载该文件并在结尾处放置一个-1 filename-1.file
。有没有办法让DownloadManager
再次下载它?或者我必须自己检查一下?
代码:
private void downloadImages(final List<SomeClass> data) {
RuntimeExceptionDao<SomeClass, Integer> someDao = DatabaseAdapter.getInstance().getSomeDao();
DownloadManager downloadmanager = (DownloadManager) mContext.getSystemService(Context.DOWNLOAD_SERVICE);
for(SomeClass someClass : data){
DownloadManager.Request request = getRequest(someClass);
someClass.mDownloadId = downloadmanager.enqueue(request);
someDao.createOrUpdate(someClass);
}
}
private DownloadManager.Request getRequest(SomeClass someClass) {
Uri uri = Uri.parse(someClass.mImage);
DownloadManager.Request request = new DownloadManager.Request(uri);
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_HIDDEN);
request.setVisibleInDownloadsUi(false);
request.setDestinationInExternalFilesDir(mContext, Environment.DIRECTORY_DOWNLOADS, car.getFileName());
return request;
}
答案 0 :(得分:2)
这就是我解决它的方法,您必须向下载管理器查询并验证是否已经下载了相同的标题。如果没有任何巧合,那么我创建一个文件并使用exists函数来验证它是否已经在下载目录中。如果它不存在我开始下载。
downloadManager = (DownloadManager) getActivity().getSystemService(Context.DOWNLOAD_SERVICE);
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
//Crear objeto file con la ruta
File ExistingFile = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DOWNLOADS) + "/" + Archivos.get(position).getNombre());
//Checar el downloadManager
Cursor cursor = downloadManager.query( new Query() );
boolean IsInDownloadManager;
IsInDownloadManager = false;
for (int i = 0; i < cursor.getCount() ; i++)
{
cursor.moveToPosition(i);
Log.i("Click Grid", "Objetos en download manager [" + String.valueOf(i) + "] " + cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_TITLE)));
if (Archivos.get(position).getNombre().equals(cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_TITLE)))){
IsInDownloadManager = true;
Log.i("Click Grid", "Objeto está en download Manager " + Archivos.get(position).getNombre());
break;
}
}
if (IsInDownloadManager){
//cursor esta aputando a la fila donde se quedó en el ciclo for
int Status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
Log.i("Click Grid", cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS)));
if (Status == DownloadManager.STATUS_SUCCESSFUL){
Toast.makeText(getActivity() ,"Abriendo " + Archivos.get(position).getNombre(), Toast.LENGTH_SHORT).show();
try { openFile(getActivity(),ExistingFile ); } catch (IOException e) {e.printStackTrace();}
}else{
Toast.makeText(getActivity() ,Archivos.get(position).getNombre() + " ya se está descargando", Toast.LENGTH_SHORT).show();
}
}else{
if( ExistingFile.exists() ){
Toast.makeText(getActivity() ,"Abriendo " + Archivos.get(position).getNombre(), Toast.LENGTH_SHORT).show();
try { openFile(getActivity(),ExistingFile ); } catch (IOException e) {e.printStackTrace();}
}else{
DescargarArchivo( Archivos.get(position) );
}
}
}});