diff --git a/app/build.gradle b/app/build.gradle
index 18d4ac8ed..356d95bb4 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -38,6 +38,14 @@ android {
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         project.ext.set("archivesBaseName", name + "_" + version)
         multiDexEnabled true
+        javaCompileOptions {
+            annotationProcessorOptions {
+                arguments = [
+                        "room.incremental"     : "true",
+                        "room.expandProjection": "true"
+                ]
+            }
+        }
     }
     buildTypes {
         release {
diff --git a/app/src/main/java/io/legado/app/ui/main/MainActivity.kt b/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
index 571b32139..ddb8b3f10 100644
--- a/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
@@ -16,6 +16,7 @@ import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.Bus
 import io.legado.app.constant.PreferKey
+import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.help.storage.Backup
 import io.legado.app.lib.theme.ATH
 import io.legado.app.service.BaseReadAloudService
@@ -27,7 +28,6 @@ import io.legado.app.ui.main.my.MyFragment
 import io.legado.app.ui.main.rss.RssFragment
 import io.legado.app.utils.*
 import kotlinx.android.synthetic.main.activity_main.*
-import kotlinx.coroutines.launch
 
 class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
     BottomNavigationView.OnNavigationItemSelectedListener,
@@ -116,25 +116,23 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
 
     override fun finish() {
         if (!BuildConfig.DEBUG) {
-            launch {
-                backup()
-                super.finish()
-            }
-        } else {
-            super.finish()
+            backup()
         }
+        super.finish()
     }
 
-    private suspend fun backup() {
-        val backupPath = getPrefString(PreferKey.backupPath)
-        if (backupPath?.isNotEmpty() == true) {
-            val uri = Uri.parse(backupPath)
-            val doc = DocumentFile.fromTreeUri(this, uri)
-            if (doc?.canWrite() == true) {
-                Backup.backup(this@MainActivity, uri)
+    private fun backup() {
+        Coroutine.async {
+            val backupPath = getPrefString(PreferKey.backupPath)
+            if (backupPath?.isNotEmpty() == true) {
+                val uri = Uri.parse(backupPath)
+                val doc = DocumentFile.fromTreeUri(this@MainActivity, uri)
+                if (doc?.canWrite() == true) {
+                    Backup.backup(this@MainActivity, uri)
+                }
+            } else {
+                Backup.backup(this@MainActivity, null)
             }
-        } else {
-            Backup.backup(this@MainActivity, null)
         }
     }
 
diff --git a/app/src/main/java/io/legado/app/ui/widget/BadgeView.kt b/app/src/main/java/io/legado/app/ui/widget/BadgeView.kt
index a0764724e..b644ad5fb 100644
--- a/app/src/main/java/io/legado/app/ui/widget/BadgeView.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/BadgeView.kt
@@ -77,6 +77,7 @@ class BadgeView @JvmOverloads constructor(
         val typedArray = context.obtainStyledAttributes(attrs, R.styleable.BadgeView)
         val radios =
             typedArray.getDimensionPixelOffset(R.styleable.BadgeView_bv_radius, 8)
+        typedArray.recycle()
 
         if (layoutParams !is LayoutParams) {
             val layoutParams = LayoutParams(
@@ -107,17 +108,9 @@ class BadgeView @JvmOverloads constructor(
     }
 
     fun setBackground(dipRadius: Float, badgeColor: Int) {
-        val radius = dip2Px(dipRadius)
-        val radiusArray = floatArrayOf(
-            radius.toFloat(),
-            radius.toFloat(),
-            radius.toFloat(),
-            radius.toFloat(),
-            radius.toFloat(),
-            radius.toFloat(),
-            radius.toFloat(),
-            radius.toFloat()
-        )
+        val radius = dip2Px(dipRadius).toFloat()
+        val radiusArray =
+            floatArrayOf(radius, radius, radius, radius, radius, radius, radius, radius)
 
         val roundRect = RoundRectShape(radiusArray, null, null)
         val bgDrawable = ShapeDrawable(roundRect)
diff --git a/app/src/main/java/io/legado/app/ui/widget/font/FontSelectDialog.kt b/app/src/main/java/io/legado/app/ui/widget/font/FontSelectDialog.kt
index 1fba2ce2e..a0a4170d8 100644
--- a/app/src/main/java/io/legado/app/ui/widget/font/FontSelectDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/font/FontSelectDialog.kt
@@ -41,11 +41,11 @@ class FontSelectDialog : DialogFragment(),
     FontAdapter.CallBack {
     lateinit var job: Job
     private val fontFolderRequestCode = 35485
-    private lateinit var adapter: FontAdapter
     private val fontFolder =
         App.INSTANCE.filesDir.absolutePath + File.separator + "Fonts" + File.separator
     override val coroutineContext: CoroutineContext
         get() = job + Main
+    private var adapter: FontAdapter? = null
 
     override fun onStart() {
         super.onStart()
@@ -144,7 +144,7 @@ class FontSelectDialog : DialogFragment(),
                     pathName.name.toLowerCase().matches(".*\\.[ot]tf".toRegex())
                 }?.let {
                     withContext(Main) {
-                        adapter.setItems(it.toList())
+                        adapter?.setItems(it.toList())
                     }
                 }
             } catch (e: Exception) {
@@ -161,7 +161,7 @@ class FontSelectDialog : DialogFragment(),
             file.listFiles { pathName ->
                 pathName.name.toLowerCase().matches(".*\\.[ot]tf".toRegex())
             }?.let {
-                adapter.setItems(it.toList())
+                adapter?.setItems(it.toList())
             }
         } catch (e: Exception) {
             toast(e.localizedMessage ?: "")
diff --git a/app/src/main/res/layout/item_bookshelf_grid.xml b/app/src/main/res/layout/item_bookshelf_grid.xml
index c36b288c5..ca639edd4 100644
--- a/app/src/main/res/layout/item_bookshelf_grid.xml
+++ b/app/src/main/res/layout/item_bookshelf_grid.xml
@@ -44,29 +44,21 @@
             android:layout_height="26dp"
             android:layout_gravity="right"
             android:visibility="invisible"
-            app:loading_color="@color/colorAccent"
             app:loading_width="2dp"
             tools:ignore="RtlHardcoded" />
     </FrameLayout>
 
-    <FrameLayout
-        android:id="@+id/fl_author"
+    <io.legado.app.ui.widget.BadgeView
+        android:id="@+id/bv_author"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:includeFontPadding="false"
+        android:singleLine="true"
+        app:bv_radius="1dp"
         app:layout_constraintLeft_toLeftOf="@id/iv_cover"
-        app:layout_constraintBottom_toBottomOf="@id/iv_cover">
-
-        <io.legado.app.ui.widget.BadgeView
-            android:id="@+id/bv_author"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_gravity="center"
-            android:includeFontPadding="false"
-            android:singleLine="true"
-            app:bv_radius="0dp"
-            tools:ignore="RtlHardcoded" />
-
-    </FrameLayout>
+        app:layout_constraintBottom_toBottomOf="@id/iv_cover"
+        tools:ignore="RtlHardcoded" />
 
     <TextView
         android:id="@+id/tv_name"