up

app/src/main/java/io/legado/app/base/adapter/CommonRecyclerAdapter.kt

@@ -167,10 +167,14 @@ abstract class CommonRecyclerAdapter<ITEM>(protected val context: Context) : Rec
         synchronized(lock) {
             val oldSize = getActualItemCount()
             if (this.items.addAll(newItems)) {
+                if (oldSize == 0 && getHeaderCount() == 0) {
+                    notifyDataSetChanged()
+                } else {
                     notifyItemRangeInserted(oldSize + getHeaderCount(), newItems.size)
                 }
             }
         }
+    }
 
     fun removeItem(position: Int) {
         synchronized(lock) {

app/src/main/java/io/legado/app/ui/explore/ExploreShowActivity.kt

@@ -24,6 +24,7 @@ class ExploreShowActivity : VMBaseActivity<ExploreShowViewModel>(R.layout.activi
     private lateinit var adapter: ExploreShowAdapter
     private lateinit var loadMoreView: View
     private var hasMore = true
+    private var isLoading = true
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         title_bar.title = intent.getStringExtra("exploreName")
@@ -41,9 +42,26 @@ class ExploreShowActivity : VMBaseActivity<ExploreShowViewModel>(R.layout.activi
             LayoutInflater.from(this).inflate(R.layout.view_load_more, recycler_view, false)
         adapter.addFooterView(loadMoreView)
         loadMoreView.rotate_loading.show()
+        recycler_view.addOnScrollListener(object : RecyclerView.OnScrollListener() {
+            override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
+                super.onScrolled(recyclerView, dx, dy)
+                if (!recyclerView.canScrollVertically(1)) {
+                    scrollToBottom()
+                }
+            }
+        })
+    }
+
+    private fun scrollToBottom() {
+        adapter.let {
+            if (hasMore && !isLoading) {
+                viewModel.explore()
+            }
+        }
     }
 
     private fun upData(books: List<SearchBook>) {
+        isLoading = false
         if (books.isEmpty() && adapter.isEmpty()) {
             hasMore = false
             loadMoreView.rotate_loading.hide(View.INVISIBLE)

app/src/main/java/io/legado/app/ui/explore/ExploreShowViewModel.kt

@@ -29,8 +29,9 @@ class ExploreShowViewModel(application: Application) : BaseViewModel(application
     }
 
     fun explore() {
-        bookSource?.let { source ->
-            exploreUrl?.let { url ->
+        val source = bookSource
+        val url = exploreUrl
+        if (source != null && url != null) {
             WebBook(source).exploreBook(url, page, this)
                 .timeout(30000L)
                 .onSuccess(IO) { searchBooks ->
@@ -42,6 +43,5 @@ class ExploreShowViewModel(application: Application) : BaseViewModel(application
                 }
         }
     }
-    }
 
 }