How to send emails from my Android application?

The best (and easiest) way is to use an Intent:

Intent i = new Intent(Intent.ACTION_SEND);i.setType("message/rfc822");i.putExtra(Intent.EXTRA_EMAIL  , new String[]{"recipient@example.com"});i.putExtra(Intent.EXTRA_SUBJECT, "subject of email");i.putExtra(Intent.EXTRA_TEXT   , "body of email");try {    startActivity(Intent.createChooser(i, "Send mail..."));} catch (android.content.ActivityNotFoundException ex) {    Toast.makeText(MyActivity.this, "There are no email clients installed.", Toast.LENGTH_SHORT).show();}

Otherwise you'll have to write your own client.

Use .setType("message/rfc822") or the chooser will show you all of the (many) applications that support the send intent.

I've been using this since long time ago and it seems good, no non-email apps showing up. Just another way to send a send email intent:

Intent intent = new Intent(Intent.ACTION_SENDTO); // it's not ACTION_SENDintent.putExtra(Intent.EXTRA_SUBJECT, "Subject of email");intent.putExtra(Intent.EXTRA_TEXT, "Body of email");intent.setData(Uri.parse("mailto:default@recipient.com")); // or just "mailto:" for blankintent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); // this will make such that when user returns to your app, your app is displayed, instead of the email app.startActivity(intent);