[android-developers] Re: MemoryFile - ParcelFileDescriptor
Why not use reflection to get the PFD? There is a method for that in the
MemoryFile class.
Op woensdag 4 juli 2012 09:55:32 UTC+2 schreef rtindru het volgende:
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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[android-developers] Re: MemoryFile - ParcelFileDescriptor
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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[android-developers] Re: MemoryFile - ParcelFileDescriptor
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 process to the consumer process and
the consumer can read the file.
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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