// This method implements deleteAllBooks method of retrofit Interface.
public void deleteAllBooks() {
progressBar.setVisibility(ProgressBar.VISIBLE);
RestAdapter adapter = new RestAdapter.Builder().setEndpoint(ENDPOINT).build();
retrofitInterface retro = adapter.create(retrofitInterface.class);
retro.deleteAllBooks(
new Callback<Book>() {
@Override
public void success(Book book, Response response) {
bookList.clear();
updateDisplay();
Toast.makeText(getActivity(), R.string.delete_success, Toast.LENGTH_LONG).show();
progressBar.setVisibility(ProgressBar.GONE);
}
@Override
public void failure(RetrofitError retrofitError) {
progressBar.setVisibility(ProgressBar.GONE);
Toast.makeText(getActivity(), R.string.delete_failed, Toast.LENGTH_LONG).show();
}
});
}
// This method uses RestAdapter and retrofit Interface to fetch and parse the JSON file.
// Progress bar becomes visible in the beginning of the method and is gone once the is done.
public void requestData() {
progressBar.setVisibility(ProgressBar.VISIBLE);
RestAdapter adapter = new RestAdapter.Builder().setEndpoint(ENDPOINT).build();
retrofitInterface retrofit = adapter.create(retrofitInterface.class);
retrofit.getData(
new Callback<List<Book>>() {
@Override
public void success(List<Book> books, Response response) {
bookList = books;
progressBar.setVisibility(ProgressBar.GONE);
updateDisplay();
}
@Override
public void failure(RetrofitError retrofitError) {
progressBar.setVisibility(ProgressBar.GONE);
Toast.makeText(getActivity(), R.string.unable_to_fetch, Toast.LENGTH_LONG).show();
}
});
}