diff --git a/app/build.gradle b/app/build.gradle
index 8bd44a700..d99118fc5 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -160,8 +160,6 @@ dependencies {
     //MarkDown
     implementation 'ru.noties.markwon:core:3.0.2'
 
-    //高斯模糊
-    implementation 'jp.wasabeef:glide-transformations:4.1.0'
 }
 
 apply plugin: 'com.google.gms.google-services'
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt b/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
index 9ed5ffb6d..2c1c28a79 100644
--- a/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
@@ -2,11 +2,13 @@ package io.legado.app.ui.book.info
 
 import android.app.Activity
 import android.content.Intent
+import android.graphics.drawable.Drawable
 import android.os.Bundle
 import android.view.Menu
 import android.view.MenuItem
 import androidx.lifecycle.Observer
 import com.bumptech.glide.Glide
+import com.bumptech.glide.RequestBuilder
 import com.bumptech.glide.load.resource.drawable.DrawableTransitionOptions
 import com.bumptech.glide.request.RequestOptions.bitmapTransform
 import io.legado.app.R
@@ -15,6 +17,7 @@ import io.legado.app.constant.BookType
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
 import io.legado.app.data.entities.BookGroup
+import io.legado.app.help.BlurTransformation
 import io.legado.app.help.ImageLoader
 import io.legado.app.help.IntentDataHelp
 import io.legado.app.ui.audio.AudioPlayActivity
@@ -26,7 +29,6 @@ import io.legado.app.ui.chapterlist.ChapterListActivity
 import io.legado.app.utils.getViewModel
 import io.legado.app.utils.gone
 import io.legado.app.utils.visible
-import jp.wasabeef.glide.transformations.BlurTransformation
 import kotlinx.android.synthetic.main.activity_book_info.*
 import kotlinx.android.synthetic.main.view_title_bar.*
 import org.jetbrains.anko.sdk27.listeners.onClick
@@ -44,7 +46,7 @@ class BookInfoActivity : VMBaseActivity<BookInfoViewModel>(R.layout.activity_boo
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         setSupportActionBar(toolbar)
-        title_bar.getBackground().setAlpha(0)
+        title_bar.background.alpha = 0
         viewModel.bookData.observe(this, Observer { showBook(it) })
         viewModel.isLoadingData.observe(this, Observer { upLoading(it) })
         viewModel.chapterListData.observe(this, Observer { showChapter(it) })
@@ -96,6 +98,11 @@ class BookInfoActivity : VMBaseActivity<BookInfoViewModel>(R.layout.activity_boo
         return super.onMenuOpened(featureId, menu)
     }
 
+    private fun defaultCover(): RequestBuilder<Drawable> {
+        return ImageLoader.load(this, R.drawable.image_cover_default)
+            .apply(bitmapTransform(BlurTransformation(this, 25)))
+    }
+
     private fun showBook(book: Book) {
         tv_name.text = book.name
         tv_author.text = getString(R.string.author_show, book.author)
@@ -110,9 +117,9 @@ class BookInfoActivity : VMBaseActivity<BookInfoViewModel>(R.layout.activity_boo
                 .into(iv_cover)
             Glide.with(this).load(it)
                 .transition(DrawableTransitionOptions.withCrossFade(1500))
-                .error(R.drawable.image_cover_default)
+                .thumbnail(defaultCover())
                 .centerCrop()
-                .apply(bitmapTransform(BlurTransformation(125, 6)))
+                .apply(bitmapTransform(BlurTransformation(this, 25)))
                 .into(bg_book)  //模糊、渐变、缩小效果
         }
         val kinds = book.getKindList()