Android how to get an SD card to specify a folder picture Uri Uri problem

============ Problem Description ============

String a= "file://" +environment.getexternalstoragedirectory (). GetPath () + "/dcim/camera/";
File Basefile = new file (A + "/dcim/camera/15.jpg");

Uri uri = uri.fromfile (basefile);
Uri uri = Uri.parse (a);
Read all images from SD card
Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
string[] projection = {mediastore.images.media._id,
MediaStore.Images.Media.DISPLAY_NAME,
MediaStore.Images.Media.DATA, MediaStore.Images.Media.SIZE};
String selection = MediaStore.Images.Media.MIME_TYPE + "=?";
String[] Selectionarg = {"Image/jpeg"};
Cursor mcursor = this.managedquery (URI, projection, selection,
Selectionarg, MediaStore.Images.Media.DATE_MODIFIED + "desc");
Imagelist.clear ();
if (mcursor! = null) {
Mcursor.movetofirst ();
while (mcursor.getposition ()! = Mcursor.getcount ()) {
ImageMap = new hashmap<string, string> ();
Imagemap.put (ImageID, mcursor.getstring (mcursor
. Getcolumnindex (mediastore.images.media._id)));
Imagemap.put (ImageName, mcursor.getstring (mcursor
. Getcolumnindex (MediaStore.Images.Media.DISPLAY_NAME)));
Imagemap.put (
Imageinfo,
" "
+ (Mcursor.getlong (mcursor
. Getcolumnindex (MediaStore.Images.Media.SIZE))/1024)
+ "KB");
Imagelist.add (IMAGEMAP);
Filenames.add (Mcursor.getstring (mcursor
. Getcolumnindex (MediaStore.Images.Media.DATA)));
Mcursor.movetonext ();
}
Mcursor.close ();
}


Read all images from SD card
Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;

This way to get all the pictures OK, but I changed to the designated SD Card folder path but not

String a= "file://" +environment.getexternalstoragedirectory (). GetPath () + "/dcim/camera/";
File Basefile = new file (A + "/dcim/camera/15.jpg");

Uri uri = uri.fromfile (basefile);
Uri uri = Uri.parse (a);
Have tried all not, do not know for Isaac, please danale hint under

============ Solution 1============

If it is a folder File.delete () will delete all files in its directory but the folder still exists ~ If it is not a folder directly deleted!

How Android obtains a picture Uri URI problem for a specified folder in an SD card