up

app/src/main/java/io/legado/app/data/dao/BookGroupDao.kt

@@ -1,6 +1,6 @@
 package io.legado.app.data.dao
 
-import androidx.paging.DataSource
+import androidx.lifecycle.LiveData
 import androidx.room.Dao
 import androidx.room.Insert
 import androidx.room.OnConflictStrategy
@@ -11,7 +11,7 @@ import io.legado.app.data.entities.BookGroup
 interface BookGroupDao {
 
     @Query("SELECT * FROM book_groups ORDER BY `order`")
-    fun observeAll(): DataSource.Factory<Int, BookGroup>
+    fun liveDataAll(): LiveData<List<BookGroup>>
 
     @get:Query("SELECT MAX(groupId) FROM book_groups")
     val maxId: Int

app/src/main/java/io/legado/app/ui/main/bookshelf/BookGroupAdapter.kt

@@ -1,65 +1,19 @@
 package io.legado.app.ui.main.bookshelf
 
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
-import androidx.paging.PagedListAdapter
-import androidx.recyclerview.widget.DiffUtil
-import androidx.recyclerview.widget.RecyclerView
+import android.content.Context
 import io.legado.app.R
+import io.legado.app.base.adapter.ItemViewHolder
+import io.legado.app.base.adapter.SimpleRecyclerAdapter
 import io.legado.app.data.entities.BookGroup
-import io.legado.app.help.AdapterDataObserverProxy
 import kotlinx.android.synthetic.main.item_book_group.view.*
 
-class BookGroupAdapter : PagedListAdapter<BookGroup, BookGroupAdapter.MyViewHolder>(DIFF_CALLBACK) {
+class BookGroupAdapter(context: Context, val callBack: CallBack) :
+    SimpleRecyclerAdapter<BookGroup>(context, R.layout.item_book_group) {
 
-    companion object {
-        @JvmField
-        val DIFF_CALLBACK = object : DiffUtil.ItemCallback<BookGroup>() {
-            override fun areItemsTheSame(oldItem: BookGroup, newItem: BookGroup): Boolean =
-                    oldItem.groupId == newItem.groupId
-
-            override fun areContentsTheSame(oldItem: BookGroup, newItem: BookGroup): Boolean =
-                    oldItem.groupId == newItem.groupId
-                            && oldItem.groupName == newItem.groupName
-                            && oldItem.order == newItem.order
-        }
-    }
-
-    var callBack: CallBack? = null
-    private val defaultGroups = arrayOf(BookGroup(-1, "全部"),
-            BookGroup(-2, "本地"),
-            BookGroup(-3, "音频"))
-
-    private val addBookGroup = BookGroup(-10, "+")
-
-    override fun getItemCount(): Int {
-        return super.getItemCount() + defaultGroups.size + 1
-    }
-
-    override fun registerAdapterDataObserver(observer: RecyclerView.AdapterDataObserver) {
-        super.registerAdapterDataObserver(AdapterDataObserverProxy(observer, defaultGroups.size))
-    }
-
-    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
-        return MyViewHolder(LayoutInflater.from(parent.context).inflate(R.layout.item_book_group, parent, false))
-    }
-
-    override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
-        when {
-            position < defaultGroups.size -> holder.bind(defaultGroups[position], callBack)
-            position == itemCount - 1 -> holder.bind(addBookGroup, callBack)
-            else -> currentList?.get(position - defaultGroups.size)?.let {
-                holder.bind(it, callBack)
-            }
-        }
-    }
-
-    class MyViewHolder(view: View) : RecyclerView.ViewHolder(view) {
-
-        fun bind(bookGroup: BookGroup, callBack: CallBack?) = with(itemView) {
-            tv_group.text = bookGroup.groupName
-            tv_group.setOnClickListener { callBack?.open(bookGroup) }
+    override fun convert(holder: ItemViewHolder, item: BookGroup, payloads: MutableList<Any>) {
+        with(holder.itemView) {
+            tv_group.text = item.groupName
+            tv_group.setOnClickListener { callBack.open(item) }
         }
     }
 

app/src/main/java/io/legado/app/ui/main/bookshelf/BooksFragment.kt

@@ -42,10 +42,14 @@ class BooksFragment : VMBaseFragment<BooksViewModel>(R.layout.fragment_books),
     private lateinit var activityViewModel: MainViewModel
     private lateinit var booksAdapter: BooksAdapter
     private var bookshelfLiveData: LiveData<PagedList<Book>>? = null
-    private val groupId = -1
+    private var groupId = -1
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         activityViewModel = getViewModelOfActivity(MainViewModel::class.java)
+        arguments?.let {
+            val position = it.getInt("position", 0)
+
+        }
         initRecyclerView()
         upRecyclerData()
     }

app/src/main/java/io/legado/app/ui/main/bookshelf/BookshelfFragment.kt

@@ -9,8 +9,6 @@ import android.widget.EditText
 import androidx.appcompat.widget.SearchView
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.Observer
-import androidx.paging.LivePagedListBuilder
-import androidx.paging.PagedList
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.viewpager2.widget.ViewPager2
 import io.legado.app.App
@@ -36,7 +34,7 @@ class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_b
 
     private lateinit var booksAdapter: BooksAdapter
     private lateinit var bookGroupAdapter: BookGroupAdapter
-    private var bookGroupLiveData: LiveData<PagedList<BookGroup>>? = null
+    private var bookGroupLiveData: LiveData<List<BookGroup>>? = null
     private var position = -1
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -61,9 +59,8 @@ class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_b
         ATH.applyEdgeEffectColor(view_pager_bookshelf)
         rv_book_group.layoutManager =
             LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false)
-        bookGroupAdapter = BookGroupAdapter()
+        bookGroupAdapter = BookGroupAdapter(requireContext(), this)
         rv_book_group.adapter = bookGroupAdapter
-        bookGroupAdapter.callBack = this
         view_pager_bookshelf.adapter = BookshelfAdapter(this)
         view_pager_bookshelf.registerOnPageChangeCallback(object :
             ViewPager2.OnPageChangeCallback() {
@@ -77,8 +74,18 @@ class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_b
 
     private fun initBookGroupData() {
         bookGroupLiveData?.removeObservers(viewLifecycleOwner)
-        bookGroupLiveData = LivePagedListBuilder(App.db.bookGroupDao().observeAll(), 10).build()
-        bookGroupLiveData?.observe(viewLifecycleOwner, Observer { bookGroupAdapter.submitList(it) })
+        bookGroupLiveData = App.db.bookGroupDao().liveDataAll()
+        bookGroupLiveData?.observe(viewLifecycleOwner, Observer {
+            mutableListOf(
+                BookGroup(-1, "全部"),
+                BookGroup(-2, "本地"),
+                BookGroup(-3, "音频")
+            ).apply {
+                addAll(it)
+            }.let {
+                bookGroupAdapter.setItems(it)
+            }
+        })
     }
 
     override fun open(bookGroup: BookGroup) {