private void showError() {
   ViewDirector.of(this).using(R.id.animator).show(R.id.error);
 }
 private void showChart() {
   ViewDirector.of(this).using(R.id.animator).show(R.id.content);
 }
 private void showMessage() {
   ViewDirector.of(this).using(R.id.animator).show(R.id.message);
 }
 private void showProgress() {
   ViewDirector.of(this).using(R.id.animator).show(R.id.progress);
 }