Ok, so the UriImage code IS expecting a Cursor that contains two columns, _data and mime_type. Silly question maybe, but how do I create a Cursor containing these columns from a static PNG file without storing the corresponding data in a database? I am now handling the Uri for the image (content://package.name/#/png) in my ContentProvider.query(), and can fudge the values from the database if needed (SELECT name AS '_data', etc), but I am not, and can't really store mime type... as it is possible for the static file to be in any number of formats (png, svg, etc).
Any pointers appreciated on how to handle this. 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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