Question

how to connect to email while clicking on button in android

Answer 1

If you want to send something by email your best bet is to use ACTION_SEND. Then it can be picked-up by email app, Twitter app, Facebook app – depending on what apps user may have on his device

private void sendBy(final String title, final String text) {
    Intent i = new Intent(android.content.Intent.ACTION_SEND);
    i.setType("text/plain");
    i.putExtra(Intent.EXTRA_SUBJECT, title);
    i.putExtra(Intent.EXTRA_TEXT, text);
    startActivity(Intent.createChooser(i, "Send this job by"));
}