复制XML文件从RES / XML文件夹来存储设备 [英] Copying Xml File From Res/Xml Folder to Device Storage

问题描述

我试图从RES / XML文件夹中复制一个xml文件到设备存储，但我真的很挣扎在如何做到这一点。

I'm trying to copy an xml file from the res/xml folder to the device storage but I'm really struggling on how to do this.

我知道的出发点是让一个的InputStream 读取XML文件。这是通过使用此实现的：

I know that the starting point is to get an InputStream to read the xml file. This is achieved by using this:

InputStream is = getResources().openRawResource(R.xml.xmlfile);

最终输出流将是：

Eventually the output stream will be:

file = new File("xmlfile.xml");
FileOutputStream fileOutputStream = new FileOutputStream(file);

但我真的很挣扎在如何阅读和从最初的XML文件正确，准确地复制所有信息。

But I'm really struggling on how to read and copy all the information from the initial xml file correctly and accurately.

到目前为止，我一直利用各种的InputStream 和的OutputStream 读写（<$ C $尝试C> DataInputStream以， DataOutputStream类， OutputStreamWriter 等），但我还是没设法正确地得到它。还有一些未知字符（编码问题？）在产生XML文件。任何人都可以帮助我在这？谢谢！

So far, I've tried using various InputStream and OutputStream to read and write (DataInputStream, DataOutputStream, OutputStreamWriter, etc.) but I still didn't managed to get it correctly. There are some unknown characters (encoding issue?) in the produced xml file. Can anyone help me on this? Thanks!

推荐答案

从 RES / XML 你不能，你必须把所有的文件在你的资产文件夹，然后使用下面code

From res/xml you can't you have to put all files in your assets folder then use below code

Resources r = getResources();
AssetManager assetManager = r.getAssets();

File f = new File(Environment.getExternalStorageDirectory(), "dummy.xml");
InputStream is = = assetManager.open("fileinAssestFolder.xml");
OutputStream os = new FileOutputStream(f, true);

final int buffer_size = 1024 * 1024;
try
{
    byte[] bytes = new byte[buffer_size];
    for (;;)
    {
        int count = is.read(bytes, 0, buffer_size);
        if (count == -1)
            break;
        os.write(bytes, 0, count);
    }
    is.close();
    os.close();
}
catch (Exception ex)
{
    ex.printStackTrace();
}

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