Java tutorial
/* * Copyright 2015 Sergio Martin Pueyo * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package ar.com.martineo14.spotifystreamer; import android.content.Intent; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ListView; import android.widget.SearchView; import android.widget.Toast; import java.util.List; import ar.com.martineo14.spotifystreamer.adapters.ArtistListAdapter; import kaaes.spotify.webapi.android.SpotifyApi; import kaaes.spotify.webapi.android.SpotifyService; import kaaes.spotify.webapi.android.models.Artist; import kaaes.spotify.webapi.android.models.ArtistsPager; import retrofit.Callback; import retrofit.RetrofitError; import retrofit.client.Response; /** * A placeholder fragment containing a simple view. */ public class SearchArtistFragment extends Fragment { public static final String ARTIST_NAME = "artist_name"; public static final String ARTIST_ID = "artist_id"; List<Artist> artistResult; private String artistNameSearch; private ArtistListAdapter artistAdapter; private ListView listView; private SearchView searchView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setRetainInstance(true); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.fragment_main, container, false); } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); listView = (ListView) view.findViewById(R.id.list_artist); searchView = (SearchView) view.findViewById(R.id.search_artist); if (savedInstanceState != null) { artistNameSearch = savedInstanceState.getString(ARTIST_NAME); searchView.setQuery(artistNameSearch, false); updateArtistList(); } searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() { @Override public boolean onQueryTextSubmit(String query) { artistNameSearch = query; updateArtistList(); return false; } @Override public boolean onQueryTextChange(String newText) { return false; } }); listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) { Artist artist = artistAdapter.getItem(position); Intent intent = new Intent(getActivity(), ArtistDetailActivity.class); intent.putExtra(ARTIST_ID, artist.id); intent.putExtra(ARTIST_NAME, artist.name); startActivity(intent); } }); } private void updateArtistList() { SpotifyApi api = new SpotifyApi(); SpotifyService spotify = api.getService(); // I used this post of the forum to the call of the API. // https://discussions.udacity.com/t/spotify-api-examples/21933 spotify.searchArtists(artistNameSearch, new Callback<ArtistsPager>() { @Override public void success(ArtistsPager artistsPager, Response response) { if (artistsPager.artists.items.size() == 0) { if (artistAdapter != null) { artistAdapter.clear(); } Toast.makeText(getActivity(), getString(R.string.msg_no_artist_found), Toast.LENGTH_LONG) .show(); } else { artistResult = artistsPager.artists.items; artistAdapter = new ArtistListAdapter(getActivity(), artistResult); listView.setAdapter(artistAdapter); } } @Override public void failure(RetrofitError error) { if (artistAdapter != null) { artistAdapter.clear(); } Toast.makeText(getActivity(), getString(R.string.msg_error_default), Toast.LENGTH_LONG).show(); } }); } @Override public void onSaveInstanceState(Bundle outState) { outState.putString(ARTIST_NAME, artistNameSearch); super.onSaveInstanceState(outState); } }