从资源路径创建文件对象到jar文件中的图像

Question

我需要在创建jar文件后,从文件路径创建一个File对象,该文件路径包含在jar文件中.如果尝试使用:

URL url = getClass().getResource("/resources/images/image.jpg");
File imageFile = new File(url.toURI());

但它不起作用.有谁知道另一种方法吗？

Answer 1

要从资源或原始文件在Android上创建文件,我执行以下操作:

try{
  InputStream inputStream = getResources().openRawResource(R.raw.some_file);
  File tempFile = File.createTempFile("pre", "suf");
  copyFile(inputStream, new FileOutputStream(tempFile));

  // Now some_file is tempFile .. do what you like
} catch (IOException e) {
  throw new RuntimeException("Can't create temp file ", e);
}

private void copyFile(InputStream in, OutputStream out) throws IOException {
    byte[] buffer = new byte[1024];
    int read;
    while((read = in.read(buffer)) != -1){
      out.write(buffer, 0, read);
    }
}

• 别忘了关闭你的溪流等