Why are you using a MemoryFile? If you need to read the file into memory,
you could just use a byte[] and byte-arrays are parcelable.
Actually, I'd suggest not reading it into memory a all and just pass the
'Uri uri' from the parcelable producer to the consumer and the consumer can
read the file (as long as the consumer is not a task running on the main UI
thread).
On Wednesday, July 4, 2012 3:55:32 AM UTC-4, rtindru wrote:
>
> I have an application that needs to Base64 decode on the fly a bitmap
> image & render it on the ImageView.
> I am using a custom content provider to do this. When the openFile method
> is called - I in this case chose to use a normal non-encoded file for
> testing purpose.
> Now I create a MemoryFile from the imagefile (after decoding) & have to
> return a ParcelFileDescriptor of the MemoryFile.
>
> I tried reflection & got the FileDescriptor of the MemoryFile but am
> unable to get the ParcelFileDescriptor from the FileDescriptor
> I tried the dup, adoptFD methods but the ParcelFileDescriptor was invalid.
> Kindly help me out here.
> Cheers
> Indru
>
> public ParcelFileDescriptor openFile(Uri uri, String mode)
> throws FileNotFoundException {
> File openFile = new File(uri.toString());
> try {
> MemoryFile file = new MemoryFile(null, (int)
> openFile.length());
> ParcelFileDescriptor pfd = ParcelFileDescriptor.open(openFile,
> ParcelFileDescriptor.MODE_READ_ONLY);
> AutoCloseInputStream in = new AutoCloseInputStream(pfd);
> byte[] buffer = new byte[in.available()];
> //Should do decoding here - skipped to test the code
> in.read(buffer, 0, buffer.length);
> file.writeBytes(buffer, 0, 0, buffer.length);
> Method getFileDescriptorMethod = file.getClass().getMethod(
> "getFileDescriptor");
> FileDescriptor out = (FileDescriptor) getFileDescriptorMethod
> .invoke(file);
> // I have the FD, now how to return a PFD?? Any ideas? dup & adoptFD dont
> work - the PFD is invalid.
>
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