Android 使用Intent

    public void  sendEmail(View view){
        Intent intent = new Intent(Intent.ACTION_SENDTO);
        intent.setData(Uri.parse("mailto:")); // only email apps should handle this
        //intent.putExtra(Intent.EXTRA_EMAIL, addresses);
        intent.putExtra(Intent.EXTRA_SUBJECT, "订单汇总");
        if (intent.resolveActivity(getPackageManager()) != null) {
            startActivity(intent);
        }
    }