什么办法能把文件传递给AsyncTask?

有没有什么方法能把文件传递给AsyncTask，比如：

public class UploadImagesTask extends AsyncTask<String, String, File> {
    @Override
    protected File doInBackground(String... params) {

还有能不能这样获取文件：

params[2]

public class DoThing extends AsyncTask<Object, String, File> {
    @Override
    protected File doInBackground(Object... params) {
        String stringy = (String) params[0];
        File file = (File) params[1];

        return file;
    }
}

由于你的参数继承于Object，调用的时候：

String aString = stringGettingMethod();
File aFile = fileGettingMethod();
new DoThing().execute(aString, aFile);