Android Mediaprovider--file management: must be present, File Manager in a few new folders, after bulk deletion, connected to the computer to see still some folders are not deleted

<span id="Label3"></p><p><p>Problem Description:</p></p><p><p>"test steps": 1, go to the file manager, create a few new folders, and then select the whole batch of these folders-delete;<br>2, the mobile phone connected to the computer, on the computer side view the file display.<br>"test results": the computer side view still has some folders not Deleted. Plug and unplug the USB cable several times, Re-view on the computer side, still Displayed.<br>Expected result: deleted folders should not be displayed on the computer Side.<br>"recurrence probability": 100% (if The first is not reproduced, step 1, 2 re-operation can be reproduced)<br>"notes": Click "search" in the file management, also can search out these Folders.<br>Follow these steps to make it easier to reproduce<br>1. Add a local folder, delete the newly added folder<br>2. Create another Folder. (the folder in the file system has been created and this record has been added to the media library, but the folder that was deleted in action 1 appears again in the media library)</p></p><p><p>This problem is caused by Mediaprovider added thread pool scan, Android native does not have this problem,</p></p><p><p><br></p></p><p><p>Workaround: Modify the internal class of the Packages/providers/mediaprovider/src/com/android/providers/media/mediascannerthreadpool.java file:</p></p><p><p></p></p><pre code_snippet_id="660966" snippet_file_name="blog_20150507_1_9581857" name="code" class="java">Private class Insertfoldertask extends Task {private contentresolver mcontentresolver;//<2015.05.06> Modify For Startprivate boolean isexistinfilesystem (String folderpath) {return new File (folderpath). exists ();}//<2015.0 5.06> Modify for end public Insertfoldertask () {super (priority_max + less_prior, 0); Mcontentresolver = Mcontext.getcontentresolver (); } @Override public void run () {long start = System.currenttimemillis (); int size = Mfoldermap.size (); list<contentvalues> folderlist = new Arraylist<contentvalues> (size); iterator<entry<string, folderstructure>> Iterator = mfoldermap.entryset (). Iterator (); While (iterator.hasnext ()) {entry<string, folderstructure> Entry = Iterator.next (); String FolderPath = Entry.getkey (); Folderstructure folderstructure = Entry.getvalue ();//<2015.05.06> Modify for Start///If folder has been deleted right now, remove from map and do next Check.if (!isexistin FileSystem (folderpath)) { iterator.remove ();  continue; }//<2015.05.06> Modify for End//Root folder path (store in each Directory) ha ve been insert while begin scanning if (!isexistindatabase (folderpath)) {contentvalues values = new Contentvalues (); Values.put (MediaStore.Files.FileColumns.TITLE, Mediafile.getfiletitle (folderpath)); Values.put (MediaStore.Files.FileColumns.FORMAT, mtpconstants.format_association); Values.put (MediaStore.Files.FileColumns.DATA, folderpath); Values.put (MediaStore.Files.FileColumns.DATE_MODIFIED, folderstructure.mlastmodified); Values.put (MediaStore.Files.FileColumns.SIZE, 0); Values.put (MediaStore.Files.FileColumns.IS_DRM, 0);Folderlist.add (values); If (folderlist.size () >=) {sortbypath (folderlist); Flush (mediascannerinserter.file_uri, folderlist); Folderlist.clear (); }}} if (!folderlist.isempty ()) {sortbypath (folderlist); Flush (mediascannerinserter.file_uri, folderlist); }///Insert task finish, Execute single type scan Task. Executesingletypescantask (); Long end = System.currenttimemillis (); MTKLOG.V (TAG, "Insert All folder entries Finsih in" + thread.currentthread (). getName () + ": folder size =" + mfoldermap.size () + ", Insert num =" + folderlist.size () + ", cost =" + (end-start) + "ms"); private void Sortbypath (list<contentvalues> list) {collections.sort (list, New Comparator<con Tentvalues> () { public int Compare (contentvalues old, contentvalues latest) {String oldpath = old.getasstring (Me diaStore.Files.FileColumns.DATA); String Latestpath = latest.getasstring (MediaStore.Files.FileColumns.DATA); If (latestpath! = null && oldpath! = Null) {return oldpath.compareto (latestpath); } return 0; }; }); Private Boolean isexistindatabase (String folderpath) {cursor cursor = null; Try {cursor = mcontentresolver.query (mediascannerinserter.file_uri, null, M EdiaStore.Files.FileColumns.DATA + "=?", New string[] {folderpath}, null, null); return cursor! = null && cursor.movetofirst (); } catch (Exception e) {mtklog.e (TAG, "Check isexistindatabase with Exception for" + folderpath, e); RetUrn true; } finally {if (cursor! = Null) {cursor.close (); }}} private void Flush (Uri tableuri, list<contentvalues> List) {long start = System.currenttimemillis (); int size = List.size (); contentvalues[] Valuesarray = new contentvalues[size]; Valuesarray = List.toarray (valuesarray); Try {mcontentresolver.bulkinsert (tableuri, valuesarray); } catch (Exception E) {mtklog.e (TAG, "bulkinsert with Exception for" + tableuri, e); } Long end = System.currenttimemillis (); MTKLOG.D (TAG, "flush" + Tableuri + "with size" + size + "which cost" + (end-start) + "ms"); } }</pre>Add//<2015.05.06> Modify for Start<br><2015.05.06> Modify for End<p><p></p></p><p><p>The modification<br><br></p></p><p><p>Android Mediaprovider--file management: must be present, File Manager in a few new folders, after bulk deletion, connected to the computer to see still some folders are not deleted</p></p></span>