Thanks Kostya. My app actually DOES use a SQLite DB as well for other functionality that makes use of the content provider, but like you mention, with a custom Uri I can match against a known set and handle the file requests as needed. I am assuming that once I handle this query() issue, then openFile() will be called at some subsequent stage where I can then set the permissions as needed to give the send/share functionality access to the private file as needed. Will post back here once I have this implemented.
Thanks, Paul On Apr 26, 4:13 pm, Kostya Vasilyev <[email protected]> wrote: > 26.04.2011 19:53, Paul пишет: > > > Right, but in my case I am dealing with a physical file, not data > > stored in a database. I have physical .png files located in the > > applications /files directory that I want to be able to send/share. > > A ContentProvider doesn't have to be backed by a database. > > Since yours is not, you can use MatrixCursor to build one row of data in > memory in your query(). > > http://developer.android.com/reference/android/database/MatrixCursor.... > > > As I was originally copying the file over to the cache directory and > > making them world readable via .exec(), I asked about spaces in > > filenames. I was told not to use this method, but to use the content > > provider, but that only gets called if I move away from the file: uri > > to the content: uri... but using a content provider, the share/send > > seems to be expecting some kind of database implementation. > > There is no expectation of a database. > > Even though ContentProviders are often backed up by SQL databases, the > abstraction is flexible enough to allow for non-database data (as is the > case for your application). > > > Should I be looking for the file-specific uri in query() (those that > > end with .png), and if that hits, then create and return a cursor that > > contains the needed columns, fn, _data? > > Remember that these URIs originate from your own code, and are opaque to > all other applications. > > There is really no need to be cryptic (e.g. > content://paulsapp/item/2349), you can make them more convenient for > yourself, for example: > > content://paulsapp/cache/RealFileName.png > > Writing query() should be really simple then. > > Just for reference, Open Intents File Manager does something pretty > close with its content URIs, so you are heading down a well trodden path. > > -- Kostya > > > > > Thanks, > > > Paul > > > On Apr 26, 11:42 am, Kostya Vasilyev<[email protected]> wrote: > >> > Right. > > >> > Any sane application dealing with a content:// URI will want to know the > >> > data item's title and size (at least). > > >> > It would do that by querying the URI for columns, defined here: > > >> > http://developer.android.com/reference/android/provider/MediaStore.Me... > > >> > using ContentResolver, which will direct the query back to your > >> > ContentProvider's query method. > > >> > Looks like the MMS application also wants to get the actual filename > >> > (the _data column). > > >> > -- Kostya > > >> > 26.04.2011 19:29, Paul пишет: > > >>> > > That did it when it comes to my own call to: > > >>> > > getContentResolver().openFileDescriptor(validUri, "r"); > > >>> > > It is now calling openAssetFile() in my content provider. However, > >>> > in > >>> > > the usage of the send functionality with the content://... uri: > > >>> > > Intent share = new Intent(Intent.ACTION_SEND); > >>> > > share.setType(StylePad.DEFAULT_MIME_PNG); > >>> > > share.putExtra(Intent.EXTRA_STREAM, validUri); > >>> > > startActivity(Intent.createChooser(share, > >>> > > getString(R.string.activity_title_share))); > > >>> > > I am now getting a IllegalArgumentException thrown, and my openFile/ > >>> > > openAssetFile never gets called (the Exception is hitting before it > >>> > > would get there I guess). Here is the Exception: > > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): > >>> > > java.lang.IllegalArgumentException: column '_data' does not exist > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > > >>> > android.database.AbstractCursor.getColumnIndexOrThrow(AbstractCursor.java: > >>> > > 314) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > > >>> > android.database.CursorWrapper.getColumnIndexOrThrow(CursorWrapper.java: > >>> > > 99) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > com.android.mms.ui.UriImage.initFromContentUri(UriImage.java:160) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > com.android.mms.ui.UriImage.<init>(UriImage.java:90) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > com.android.mms.ui.MMSMessage.addImage(MMSMessage.java:1076) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > com.android.mms.ui.ConversationList.addMedia(ConversationList.java: > >>> > > 7095) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > > >>> > com.android.mms.ui.ConversationList.addAttachment(ConversationList.java: > >>> > > 8370) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > > >>> > com.android.mms.ui.ConversationList.handleIntent(ConversationList.java: > >>> > > 1860) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > > >>> > com.android.mms.ui.ConversationList.access$2800(ConversationList.java: > >>> > > 180) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > com.android.mms.ui.ConversationList > >>> > > $ThreadListQueryHandler.onQueryComplete(ConversationList.java:2999) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > > >>> > android.content.AsyncQueryHandler.handleMessage(AsyncQueryHandler.java: > >>> > > 344) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > android.os.Handler.dispatchMessage(Handler.java:99) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > android.os.Looper.loop(Looper.java:123) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > android.app.ActivityThread.main(ActivityThread.java:4627) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > java.lang.reflect.Method.invokeNative(Native Method) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > java.lang.reflect.Method.invoke(Method.java:521) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > com.android.internal.os.ZygoteInit > >>> > > $MethodAndArgsCaller.run(ZygoteInit.java:871) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629) > >>> > > 04-26 11:12:54.322: ERROR/AndroidRuntime(12440): at > >>> > > dalvik.system.NativeStart.main(Native Method) > > >>> > > Looking at the source: > >>> > >http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.... > > >>> > > So the Send functionality is querying my Provider's query() method, > >>> > > which I can see, but it is looking for two columns that I simply > >>> > don't > >>> > > have, Part.FILENAME (column fn) and then if not found, column > >>> > > Part._DATA (column _data). > > >>> > > Any ideas how to respond to this? > > -- > Kostya Vasilyev --http://kmansoft.wordpress.com -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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