修改弃用方法

app/src/main/java/io/legado/app/ui/book/toc/ChapterListActivity.kt

@@ -6,16 +6,15 @@ import androidx.activity.viewModels
 import androidx.appcompat.widget.SearchView
 import androidx.core.view.isGone
 import androidx.fragment.app.Fragment
-import androidx.fragment.app.FragmentManager
-import androidx.fragment.app.FragmentPagerAdapter
+import androidx.viewpager2.adapter.FragmentStateAdapter
 import com.google.android.material.tabs.TabLayout
+import com.google.android.material.tabs.TabLayoutMediator
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.databinding.ActivityChapterListBinding
 import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.accentColor
 import io.legado.app.lib.theme.primaryTextColor
-
 import io.legado.app.utils.gone
 import io.legado.app.utils.visible
 
@@ -37,8 +36,13 @@ class ChapterListActivity : VMBaseActivity<ActivityChapterListBinding, ChapterLi
         tabLayout.setSelectedTabIndicatorColor(accentColor)
         intent.getStringExtra("bookUrl")?.let {
             viewModel.initBook(it) {
-                binding.viewPager.adapter = TabFragmentPageAdapter(supportFragmentManager)
-                tabLayout.setupWithViewPager(binding.viewPager)
+                binding.viewPager.adapter = TabFragmentPageAdapter()
+                TabLayoutMediator(tabLayout, binding.viewPager) { tab, position ->
+                    when (position) {
+                        0 -> tab.setText(R.string.chapter_list)
+                        else -> tab.setText(R.string.bookmark)
+                    }
+                }
             }
         }
     }
@@ -72,23 +76,16 @@ class ChapterListActivity : VMBaseActivity<ActivityChapterListBinding, ChapterLi
         return super.onCompatCreateOptionsMenu(menu)
     }
 
-    private inner class TabFragmentPageAdapter(fm: FragmentManager) :
-        FragmentPagerAdapter(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT) {
-        override fun getItem(position: Int): Fragment {
-            return when (position) {
-                1 -> BookmarkFragment()
-                else -> ChapterListFragment()
-            }
-        }
+    private inner class TabFragmentPageAdapter : FragmentStateAdapter(this) {
 
-        override fun getCount(): Int {
+        override fun getItemCount(): Int {
             return 2
         }
 
-        override fun getPageTitle(position: Int): CharSequence {
+        override fun createFragment(position: Int): Fragment {
             return when (position) {
-                1 -> getString(R.string.bookmark)
-                else -> getString(R.string.chapter_list)
+                0 -> ChapterListFragment()
+                else -> BookmarkFragment()
             }
         }
 

app/src/main/java/io/legado/app/ui/filepicker/FilePickerActivity.kt

@@ -116,12 +116,10 @@ class FilePickerActivity :
                     "*" -> types.add("*/*")
                     "txt", "xml" -> types.add("text/*")
                     else -> {
-                        val mime = MimeTypeMap.getSingleton().getMimeTypeFromExtension("json")
-                        if (mime == null) {
-                            types.add("application/octet-stream")
-                        } else {
-                            types.add(mime)
-                        }
+                        val mime = MimeTypeMap.getSingleton()
+                            .getMimeTypeFromExtension("json")
+                            ?: "application/octet-stream"
+                        types.add(mime)
                     }
                 }
             }

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

@@ -12,7 +12,7 @@
         app:contentInsetStartWithNavigation="0dp"
         app:contentLayout="@layout/view_tab_layout" />
 
-    <androidx.viewpager.widget.ViewPager
+    <androidx.viewpager2.widget.ViewPager2
         android:id="@+id/view_pager"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />