在Android开发中，使用流的时候务必需要在使用完毕的时候关闭流，不然可能会造成一些其他问题。
但是写关闭流的时候会发现代码不是很简单的一行，所以总结一个关闭流的工具类。
代码比较简单，直接列举出来：

public class IOUtil {
    public static void close(Closeable closeable) {
        if (closeable != null) {
            try {
                closeable.close();
            } catch (Throwable ignored) {}
        }
    }
}

虽然代码看起来很简单，但是这样简单的封装之后。以后每一次做处理的时候就不需要再多写几行代码了，而只用一行代码搞定。

那哪些接口实现的时候，需要注意关闭释放掉呢？

所有已知子接口：

ByteChannel, Channel, GatheringByteChannel, InterruptibleChannel, JavaFileManager, JMXConnector, ReadableByteChannel, RMIConnection, ScatteringByteChannel, StandardJavaFileManager, WritableByteChannel

所有已知实现类：

AbstractInterruptibleChannel, AbstractSelectableChannel, AudioInputStream, BufferedInputStream, BufferedOutputStream, BufferedReader, BufferedWriter, ByteArrayInputStream, ByteArrayOutputStream, CharArrayReader, CharArrayWriter, CheckedInputStream, CheckedOutputStream, CipherInputStream, CipherOutputStream, DatagramChannel, DataInputStream, DataOutputStream, DeflaterInputStream, DeflaterOutputStream, DigestInputStream, DigestOutputStream, FileChannel, FileInputStream, FileOutputStream, FileReader, FileWriter, FilterInputStream, FilterOutputStream, FilterReader, FilterWriter, Formatter, ForwardingJavaFileManager, GZIPInputStream, GZIPOutputStream, InflaterInputStream, InflaterOutputStream, InputStream, InputStreamReader, JarInputStream, JarOutputStream, LineNumberInputStream, LineNumberReader, LogStream, ObjectInputStream, ObjectOutputStream, OutputStream, OutputStream, OutputStreamWriter, Pipe.SinkChannel, Pipe.SourceChannel, PipedInputStream, PipedOutputStream, PipedReader, PipedWriter, PrintStream, PrintWriter, ProgressMonitorInputStream, PushbackInputStream, PushbackReader, RandomAccessFile, Reader, RMIConnectionImpl, RMIConnectionImpl_Stub, RMIConnector, RMIIIOPServerImpl, RMIJRMPServerImpl, RMIServerImpl, SelectableChannel, SequenceInputStream, ServerSocketChannel, SocketChannel, StringBufferInputStream, StringReader, StringWriter, Writer, ZipInputStream, ZipOutputStream