从Uri读取inputStream并通过outputStream android发送的问题

此外,我不知道我是否正确使用URI来获取要发送的文件的实际路径.

请大家多多感激之情,因为我已经被困在这里一段时间了.谢谢.

我的代码：

public void sendFile() {
    Log.d(TAG,"sending data");
    InputStream inputStream = null;
    String filePath = Environment.getExternalStorageDirectory()
          .toString() + "/" + files.get(0);
    Log.d(TAG,"filepath is" + filePath);

    Uri uri = Uri.parse(filePath);

    Log.d(TAG,"obtained input stream here in Activity");
    Log.d(TAG,"Uri here is" + uri);  // nothing happens after here,Basically stuck!!
    try {
        inputStream = getContentResolver().openInputStream(uri);
        ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();
        Log.d(TAG,"obtained input stream here in Activity");

        int buffersize = 1024;
        byte[] buffer = new byte[buffersize];

        int len = 0;
        while ((len = inputStream.read(buffer)) != -1) {
            byteBuffer.write(buffer,len);
        }

        AppServices.write(byteBuffer.toByteArray());

    } catch (IOException e) {
        e.printStackTrace();
    }
    finally {
        if (inputStream != null) {
            try {
                inputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}