Example usage for android.os Parcel readFileDescriptor

Introduction

In this page you can find the example usage for android.os Parcel readFileDescriptor.

Prototype

public final ParcelFileDescriptor readFileDescriptor() 

Source Link

Document

Read a FileDescriptor from the parcel at the current dataPosition().

Usage

From source file:edu.umich.flowfence.common.ParceledPayload.java

public static ParceledPayload fromParcel(Parcel p) {
    byte[] data = p.createByteArray();
    if (data == null) {
        // Null data = data's stored in an ashmem region.
        try (ParcelFileDescriptor pfd = p.readFileDescriptor()) {
            FileDescriptor fd = pfd.getFileDescriptor();
            int size = MemoryFile.getSize(fd);
            if (size == -1) {
                throw new ParcelFormatException("ParceledPayload blob is not ashmem");
            }//w  ww .j  a v a  2  s  . c  o  m
            data = new byte[size];
            FileInputStream fis = new FileInputStream(fd);
            FileChannel chan = fis.getChannel();
            MappedByteBuffer mapping = chan.map(FileChannel.MapMode.READ_ONLY, 0, size);
            mapping.get(data);
        } catch (IOException e) {
            Log.e(TAG, "Couldn't unparcel - not an ashmem region?", e);
            ParcelFormatException pfe = new ParcelFormatException("Exception reading blob for ParceledPayload");
            pfe.initCause(e);
            throw pfe;
        }
    }
    return new ParceledPayload(data);
}

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