Java tutorial
/** * Copyright unknown year Mark Murphy * 2014-2015 Jan Seeger * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.github.mjdev.libaums.storageprovider.util; import android.os.ParcelFileDescriptor; import android.util.Log; import org.apache.commons.io.IOUtils; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; /** * ParcelFileDescriptor Utility class. * Based on CommonsWare's ParcelFileDescriptorUtil. */ public class ParcelFileDescriptorUtil { public static ParcelFileDescriptor pipeFrom(InputStream inputStream) throws IOException { final ParcelFileDescriptor[] pipe = ParcelFileDescriptor.createPipe(); final OutputStream output = new ParcelFileDescriptor.AutoCloseOutputStream(pipe[1]); new TransferThread(inputStream, output).start(); return pipe[0]; } @SuppressWarnings("unused") public static ParcelFileDescriptor pipeTo(OutputStream outputStream) throws IOException { final ParcelFileDescriptor[] pipe = ParcelFileDescriptor.createPipe(); final InputStream input = new ParcelFileDescriptor.AutoCloseInputStream(pipe[0]); new TransferThread(input, outputStream).start(); return pipe[1]; } static class TransferThread extends Thread { final InputStream mIn; final OutputStream mOut; TransferThread(InputStream in, OutputStream out) { super("ParcelFileDescriptor Transfer Thread"); mIn = in; mOut = out; setDaemon(true); } @Override public void run() { try { IOUtils.copy(mIn, mOut); mOut.flush(); } catch (IOException e) { Log.e("TransferThread", "writing failed"); e.printStackTrace(); } finally { IOUtils.closeQuietly(mIn); IOUtils.closeQuietly(mOut); } } } }