/** Topic hierarchy parsing */
public static TopicNode parseTopics(String json) throws JSONException {
JSONObject jTopics = new JSONObject(json);
ArrayList<TopicNode> topics = parseTopicChildren(jTopics);
TopicNode root = new TopicNode();
root.setChildren(topics);
return root;
}
/** Reads through the given JSONObject and adds any topics to the given topic. */
private static ArrayList<TopicNode> parseTopicChildren(JSONObject jTopic) throws JSONException {
// Don't allocate any lists if it's empty.
if (jTopic.length() == 0) {
return null;
}
@SuppressWarnings("unchecked")
Iterator<String> iterator = jTopic.keys();
String topicName;
ArrayList<TopicNode> topics = new ArrayList<TopicNode>();
TopicNode currentTopic;
while (iterator.hasNext()) {
topicName = iterator.next();
currentTopic = new TopicNode(topicName);
currentTopic.setChildren(parseTopicChildren(jTopic.getJSONObject(topicName)));
topics.add(currentTopic);
}
return topics;
}
@Override
public void onCreate(Bundle savedState) {
super.onCreate(savedState);
setContentView(R.layout.topic_view);
showLoading(R.id.loading_container);
if (savedState == null) {
mTopicView = new TopicViewFragment();
Bundle extras = getIntent().getExtras();
if (extras != null) {
if (extras.containsKey(GuideViewActivity.TOPIC_NAME_KEY)) {
setTitle(extras.getString(GuideViewActivity.TOPIC_NAME_KEY));
}
mTopicView.setArguments(extras);
}
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.topic_view_fragment, mTopicView);
ft.commit();
} else {
mTopicView =
(TopicViewFragment)
getSupportFragmentManager().findFragmentById(R.id.topic_view_fragment);
}
mTopicNode = (TopicNode) getIntent().getSerializableExtra(TOPIC_KEY);
if (mTopicNode != null) {
setTitle(mTopicNode.getDisplayName());
App.sendScreenView("/category/" + mTopicNode.getName());
}
}