How can I launch android's email activity with an attachment attached in the email?

In my android, how can I launch android's compose email activity with an at开发者_Go百科tachment attached?

Just launch an intent with the following structure:

Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/html");
intent.putExtra(Intent.EXTRA_EMAIL, new String[]{"to@example.com"});
intent.putExtra(Intent.EXTRA_SUBJECT, "the subject");
intent.putExtra(Intent.EXTRA_TEXT, Html.fromHtml("the content"));
intent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file:///sdcard/file.ext"));
startActivity(intent);

Notice that I'm using the complete path to the file: "file:///sdcard/file.ext". Also, take into account that you can share files that you have saved into the SDCard only (otherwise, the email client will ignore the file).