在我的应用程序，我想保存某个文件具有不同名称的副本（这是我从用户获得）

In my app I want to save a copy of a certain file with a different name (which I get from user)

我真的需要打开该文件的内容，并将其写入到另一个文件？

Do I really need to open the contents of the file and write it to another file?

什么是这样做的最佳方法是什么？

What is the best way to do so?

推荐答案

要复制的文件并将其保存到你的目的地的路径，你可以使用下面的方法。

To copy a file and save it to your destination path you can use the method below.

public void copy(File src, File dst) throws IOException {
    InputStream in = new FileInputStream(src);
    OutputStream out = new FileOutputStream(dst);

    // Transfer bytes from in to out
    byte[] buf = new byte[1024];
    int len;
    while ((len = in.read(buf)) > 0) {
        out.write(buf, 0, len);
    }
    in.close();
    out.close();
}