Java tutorial
/* * OpenKarotz-Android * http://github.com/hobbe/OpenKarotz-Android * * Copyright (c) 2014 Olivier Bagot (http://github.com/hobbe) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * http://opensource.org/licenses/MIT * */ package com.github.hobbe.android.openkarotz.fragment; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.app.ActionBar; import android.app.Activity; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.view.ViewPager; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import com.github.hobbe.android.openkarotz.R; import com.github.hobbe.android.openkarotz.activity.MainActivity; import com.github.hobbe.android.openkarotz.adapter.RadioTabsPagerAdapter; import com.github.hobbe.android.openkarotz.model.RadioGroupModel; import com.github.hobbe.android.openkarotz.model.RadioModel; import com.github.hobbe.android.openkarotz.util.AssetUtils; /** * Radio fragment. */ public class RadioFragment extends Fragment { /** * Initialize a new radio fragment. */ public RadioFragment() { // Nothing to initialize } /** * Get the pager adapter. * @return the pager adapter */ public RadioTabsPagerAdapter getPagerAdapter() { return pagerAdapter; } @Override public void onActivityCreated(Bundle savedInstanceState) { Log.v(LOG_TAG, "onActivityCreated"); super.onActivityCreated(savedInstanceState); } @Override public void onAttach(Activity activity) { Log.v(LOG_TAG, "onAttach"); super.onAttach(activity); } @Override public void onCreate(Bundle savedInstanceState) { Log.v(LOG_TAG, "onCreate"); radioGroups = loadRadios(); super.onCreate(savedInstanceState); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { Log.v(LOG_TAG, "onCreateView"); // Fetch the selected page number int index = getArguments().getInt(MainActivity.ARG_PAGE_NUMBER); // List of pages String[] pages = getResources().getStringArray(R.array.pages); // Page title String pageTitle = pages[index]; getActivity().setTitle(pageTitle); // Action bar tab navigation actionBar = getActivity().getActionBar(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); View view = inflater.inflate(R.layout.page_radio, container, false); initializeView(view); Log.v(LOG_TAG, "onCreateView ... done"); return view; } @Override public void onDestroy() { Log.v(LOG_TAG, "onDestroy"); super.onDestroy(); } @Override public void onDestroyView() { Log.v(LOG_TAG, "onDestroyView"); super.onDestroyView(); } @Override public void onDetach() { Log.v(LOG_TAG, "onDetach"); super.onDetach(); } @Override public void onPause() { Log.v(LOG_TAG, "onPause"); super.onPause(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD); } @Override public void onResume() { Log.v(LOG_TAG, "onResume"); super.onResume(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); } private void initializeView(View view) { Log.v(LOG_TAG, "Initializing radio fragment view"); // View pager Log.v(LOG_TAG, "Initializing view pager"); viewPager = (ViewPager) view.findViewById(R.id.pagerRadio); // Pager adapter Log.v(LOG_TAG, "Initializing pager adapter"); // pagerAdapter = new RadioTabsPagerAdapter(getActivity().getSupportFragmentManager(), radioGroups); pagerAdapter = new RadioTabsPagerAdapter(getActivity(), viewPager, radioGroups); } private RadioGroupModel[] loadRadios() { Log.d(LOG_TAG, "Loading radio list"); RadioGroupModel[] radios = null; try { JSONObject json = AssetUtils.loadJsonFromAsset(getActivity(), "radios.json"); JSONArray list = json.getJSONArray("radios"); int count = list.length(); radios = new RadioGroupModel[count]; for (int i = 0; i < count; i++) { JSONObject element = list.getJSONObject(i); RadioGroupModel group = loadRadioGroup(element); if (group != null) { Log.v(LOG_TAG, "Loaded radio group: " + group.getName()); radios[i] = group; } } Log.i(LOG_TAG, "Using radio list from asset radios.json"); } catch (JSONException e) { Log.e(LOG_TAG, "Could not parse JSON content: " + e.getMessage(), e); } return radios; } /** * Load a radio group. * @param json the JSON object containing the radio group definition * @return the radio group */ private static RadioGroupModel loadRadioGroup(JSONObject json) { RadioGroupModel group = null; try { String groupId = json.getString("id"); String groupName = json.getString("name"); Log.d(LOG_TAG, "Loading radio group: " + groupName); group = new RadioGroupModel(groupId, groupName); JSONArray list = json.getJSONArray("radios"); int count = list.length(); for (int i = 0; i < count; i++) { JSONObject element = list.getJSONObject(i); String id = element.getString("id"); String name = element.getString("name"); String url = element.getString("url"); // Log.v(LOG_TAG, "Adding radio " + name + " to group " + group.getName()); group.addRadio(new RadioModel(id, name, url)); } } catch (JSONException e) { Log.e(LOG_TAG, "Could not parse JSON content: " + e.getMessage(), e); } return group; } private ViewPager viewPager = null; private RadioTabsPagerAdapter pagerAdapter = null; private ActionBar actionBar = null; private RadioGroupModel[] radioGroups = null; private static final String LOG_TAG = RadioFragment.class.getSimpleName(); }