Close FD in WriteableArchive::close().

import android.net.Uri;

import android.os.CancellationSignal;

import android.os.OperationCanceledException;

import android.os.ParcelFileDescriptor.AutoCloseOutputStream;

import android.os.ParcelFileDescriptor;

import android.provider.DocumentsContract.Document;

import android.support.annotation.Nullable;

    private final ExecutorService mExecutor = Executors.newSingleThreadExecutor();

    @GuardedBy("mEntries")

    private final ZipOutputStream mZipOutputStream;

    private final AutoCloseOutputStream mOutputStream;

    /**

     * Takes ownership of the passed file descriptor.

     */

    private WriteableArchive(

            Context context,

            FileDescriptor fd,

            ParcelFileDescriptor fd,

            Uri archiveUri,

            int accessMode,

            @Nullable Uri notificationUri)

        }

        addEntry(null /* no parent */, new ZipEntry("/"));  // Root entry.

        mZipOutputStream = new ZipOutputStream(new FileOutputStream(fd));

        mOutputStream = new AutoCloseOutputStream(fd);

        mZipOutputStream = new ZipOutputStream(mOutputStream);

    }

    private void addEntry(@Nullable ZipEntry parentEntry, ZipEntry entry) {

            Context context, ParcelFileDescriptor descriptor, Uri archiveUri, int accessMode,

            @Nullable Uri notificationUri)

            throws IOException {

        FileDescriptor fd = null;

        try {

            fd = new FileDescriptor();

            fd.setInt$(descriptor.detachFd());

            return new WriteableArchive(context, fd, archiveUri, accessMode, notificationUri);

            return new WriteableArchive(context, descriptor, archiveUri, accessMode,

                    notificationUri);

        } catch (Exception e) {

            // Since the method takes ownership of the passed descriptor, close it

            // on exception.

            IoUtils.closeQuietly(descriptor);

            IoUtils.closeQuietly(fd);

            throw e;

        }

    }

                Log.e(TAG, "Failed while closing the ZIP file.", e);

            }

        }

        IoUtils.closeQuietly(mOutputStream);

    }

};