优化

app/src/main/java/io/legado/app/base/BaseFragment.kt

@@ -6,9 +6,11 @@ import android.view.MenuItem
 import androidx.appcompat.view.SupportMenuInflater
 import androidx.appcompat.widget.Toolbar
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.LifecycleRegistry
 import io.legado.app.utils.setIconColor
 
-abstract class BaseFragment(contentLayoutId: Int = 0) : Fragment(contentLayoutId) {
+abstract class BaseFragment(contentLayoutId: Int = 0) : Fragment(contentLayoutId){
 
     var supportToolbar: Toolbar? = null
         private set

app/src/main/java/io/legado/app/ui/main/booksource/BookSourceAdapter.kt

@@ -1,5 +1,6 @@
 package io.legado.app.ui.main.booksource
 
+import android.content.Context
 import android.view.View
 import android.view.ViewGroup
 import androidx.paging.PagedListAdapter
@@ -7,7 +8,7 @@ import androidx.recyclerview.widget.DiffUtil
 import androidx.recyclerview.widget.RecyclerView
 import io.legado.app.data.entities.Source
 
-class BookSourceAdapter : PagedListAdapter<Source, BookSourceAdapter.MyViewHolder>(DIFF_CALLBACK) {
+class BookSourceAdapter(context : Context) : PagedListAdapter<Source, BookSourceAdapter.MyViewHolder>(DIFF_CALLBACK) {
 
     companion object {
 

app/src/main/java/io/legado/app/ui/main/booksource/BookSourceFragment.kt

@@ -4,14 +4,23 @@ import android.os.Bundle
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
+import androidx.lifecycle.LiveData
+import androidx.paging.PagedList
+import androidx.recyclerview.widget.LinearLayoutManager
 import io.legado.app.R
 import io.legado.app.base.BaseFragment
+import io.legado.app.data.entities.Source
+import kotlinx.android.synthetic.main.fragment_book_source.*
 import kotlinx.android.synthetic.main.view_titlebar.*
 
 class BookSourceFragment : BaseFragment(R.layout.fragment_book_source) {
 
+    private lateinit var adapter : BookSourceAdapter
+    private var sourceLiveDate : LiveData<PagedList<Source>>? = null
+
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         setSupportToolbar(toolbar)
+        initRecyclerView()
     }
 
     override fun onCompatCreateOptionsMenu(menu: Menu) {
@@ -22,5 +31,16 @@ class BookSourceFragment : BaseFragment(R.layout.fragment_book_source) {
 
     }
 
+    private fun initRecyclerView() {
+        recycler_view.layoutManager = LinearLayoutManager(context)
+        context?.let {
+            adapter = BookSourceAdapter(it)
+            recycler_view.adapter = adapter
+        }
+
+    }
 
+    private fun initDataObservers() {
+
+    }
 }

app/src/main/res/layout/fragment_book_source.xml

@@ -14,4 +14,9 @@
             app:layout_constraintTop_toTopOf="parent"
             app:title="@string/book_source"/>
 
+    <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/recycler_view"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"/>
+
 </androidx.constraintlayout.widget.ConstraintLayout>