Part 8: Saving news in onSavedInstanceState

juanchosaravia · Apr 29, 2016 · f6c837a · f6c837a
1 parent d4dabc4
commit f6c837a
Showing 1 changed file with 24 additions and 6 deletions.
diff --git a/app/src/main/java/com/droidcba/kedditbysteps/features/news/NewsFragment.kt b/app/src/main/java/com/droidcba/kedditbysteps/features/news/NewsFragment.kt
@@ -18,6 +18,10 @@ import rx.schedulers.Schedulers
 
 class NewsFragment : RxBaseFragment() {
 
+    companion object {
+        private val KEY_REDDIT_NEWS = "redditNews"
+    }
+
     private var redditNews: RedditNews? = null
     private val newsManager by lazy { NewsManager() }
 
@@ -28,18 +32,32 @@ class NewsFragment : RxBaseFragment() {
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
 
-        news_list.setHasFixedSize(true)
-        val linearLayout = LinearLayoutManager(context)
-        news_list.layoutManager = linearLayout
-        news_list.clearOnScrollListeners()
-        news_list.addOnScrollListener(InfiniteScrollListener({ requestNews() }, linearLayout))
+        news_list.apply {
+            setHasFixedSize(true)
+            val linearLayout = LinearLayoutManager(context)
+            layoutManager = linearLayout
+            clearOnScrollListeners()
+            addOnScrollListener(InfiniteScrollListener({ requestNews() }, linearLayout))
+        }
+
         initAdapter()
 
-        if (savedInstanceState == null) {
+        if (savedInstanceState != null && savedInstanceState.containsKey(KEY_REDDIT_NEWS)) {
+            redditNews = savedInstanceState.get(KEY_REDDIT_NEWS) as RedditNews
+            (news_list.adapter as NewsAdapter).clearAndAddNews(redditNews!!.news)
+        } else {
             requestNews()
         }
     }
 
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+        val news = (news_list.adapter as NewsAdapter).getNews()
+        if (redditNews != null && news.size > 0) {
+            outState.putParcelable(KEY_REDDIT_NEWS, redditNews?.copy(news = news))
+        }
+    }
+
     private fun requestNews() {
         /**
          * first time will send empty string for after parameter.