GDK发送带附件的电子邮件

Question

我正在尝试发送带附件的电子邮件，但似乎错误了：

 private void sendEmail(File pictureFile){
    Uri uri = Uri.fromFile(pictureFile);
    Date dt = new Date();

    Intent i = new Intent(Intent.ACTION_SEND);
    i.setType("text/plain");
    i.putExtra(Intent.EXTRA_EMAIL  , new String[]{"a@gmail.com", "b@gmail.com"});
    i.putExtra(Intent.EXTRA_SUBJECT, "Google Glass Capture");
    i.putExtra(Intent.EXTRA_TEXT   , "Taken "+ dt.toString());
    i.putExtra(Intent.EXTRA_STREAM, uri);
    try {
            Log.d("Msg","Trying to send mail");
            startActivity(Intent.createChooser(i,"pick"));
    } catch (android.content.ActivityNotFoundException ex) {
            Log.e("ERR","Error " + ex.toString());
            Toast.makeText(MainActivity.this, 
                           "There are no email clients installed.", 
                           Toast.LENGTH_SHORT).show();
    }
}

有没有不同的方式用谷歌玻璃发送邮件，然后用android发送邮件？