@Override
 public void onClick(View v) {
   if (etChangeDomain.getText().length() != 0) {
     DomainDataStore.saveDomainUrl(
         DomainDevOptionActivity.this, etChangeDomain.getText().toString());
     finish();
   } else {
     Toast.makeText(
             DomainDevOptionActivity.this, "Domain can not be empty!!!", Toast.LENGTH_LONG)
         .show();
   }
 }
 private String getCurrentDomain() {
   return DomainDataStore.getDomainUrl(this, defaultDomain);
 }