Java FileChannel copy文件

public static void copyFileWithCallback1(final String sourcefile, final String targetFile, ICommonProgressCallback callback) {
        FileInputStream fileInputStream = null;
        BufferedInputStream inbuff = null;
        FileOutputStream fileOutputStream = null;
        BufferedOutputStream outbuff = null;
        FileChannel fileChannelOutput = null;
        FileChannel fileChannelInput = null;
        try {
            fileInputStream = new FileInputStream(sourcefile);
            inbuff = new BufferedInputStream(fileInputStream);
            fileOutputStream = new FileOutputStream(targetFile); // 新建文件输出流并对它进行缓冲
            outbuff = new BufferedOutputStream(fileOutputStream);
            fileChannelOutput = fileOutputStream.getChannel();
            fileChannelInput = fileInputStream.getChannel();

            long total = fileInputStream.available();
            ByteBuffer buffer = ByteBuffer.allocate(4096);
            long transferSize = 0;
            int tempP = 0;
            int progress = 0;
            while (fileChannelInput.read(buffer) != -1) {
                buffer.flip();
                transferSize += fileChannelOutput.write(buffer);
                progress = (int) ((transferSize * 100) / total);
                if (progress > tempP) {
                    tempP = progress;
                    if (callback != null) {
                        callback.onProgress(progress);
                    }
                }
                buffer.clear();
            }
        } catch (FileNotFoundException e) {
            Log.e("CopyPasteUtil", "CopyPasteUtil copyFile error:" + e.getMessage());
        } catch (IOException e) {
            Log.e("CopyPasteUtil", "CopyPasteUtil copyFile error:" + e.getMessage());
        } finally {
            try {
                outbuff.flush();
                inbuff.close();
                outbuff.close();
                fileOutputStream.close();
                fileInputStream.close();
                fileChannelOutput.close();
                fileChannelInput.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }