Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts("mailto", "testemail@gmail.com", null)); startActivity(intent);

/* Create the Intent */
final Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);

/* Fill it with Data */
emailIntent.setType("plain/text");
emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{"to@email.com"});
emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Subject");
emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, "Text");

/* Send it off to the Activity-Chooser */
context.startActivity(Intent.createChooser(emailIntent, "Send mail..."));

Intent intent = new Intent(
    Intent.ACTION_SENDTO,
    Uri.parse("mailto:testemail@gmail.com")
);
startActivity(intent);

ComponentName emailApp = intent.resolveActivity(getPackageManager());
ComponentName unsupportedAction = ComponentName.unflattenFromString("com.android.fallback/.Fallback");
boolean hasEmailApp = emailApp != null && !emailApp.equals(unsupportedAction);