diff --git a/app/src/main/java/io/legado/app/utils/BitmapUtils.kt b/app/src/main/java/io/legado/app/utils/BitmapUtils.kt
index c5da5c98b..a1d88d771 100644
--- a/app/src/main/java/io/legado/app/utils/BitmapUtils.kt
+++ b/app/src/main/java/io/legado/app/utils/BitmapUtils.kt
@@ -28,7 +28,6 @@ object BitmapUtils {
      */
     fun decodeBitmap(path: String, width: Int, height: Int): Bitmap? {
         val op = BitmapFactory.Options()
-        op.inPreferredConfig = Config.RGB_565
         val ips = FileInputStream(path)
         // inJustDecodeBounds如果设置为true,仅仅返回图片实际的宽和高,宽和高是赋值给opts.outWidth,opts.outHeight;
         op.inJustDecodeBounds = true
@@ -56,7 +55,6 @@ object BitmapUtils {
     fun decodeBitmap(path: String): Bitmap? {
 
         val opts = BitmapFactory.Options()
-        opts.inPreferredConfig = Config.RGB_565
         val ips = FileInputStream(path)
         opts.inJustDecodeBounds = true
         BitmapFactory.decodeFileDescriptor(ips.fd,null,opts)
diff --git a/epublib/src/androidTest/java/me/ag2s/epublib/ExampleInstrumentedTest.java b/epublib/src/androidTest/java/me/ag2s/epublib/ExampleInstrumentedTest.java
deleted file mode 100644
index 05c81a804..000000000
--- a/epublib/src/androidTest/java/me/ag2s/epublib/ExampleInstrumentedTest.java
+++ /dev/null
@@ -1,26 +0,0 @@
-package me.ag2s.epublib;
-
-import android.content.Context;
-
-import androidx.test.platform.app.InstrumentationRegistry;
-import androidx.test.ext.junit.runners.AndroidJUnit4;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import static org.junit.Assert.*;
-
-/**
- * Instrumented test, which will execute on an Android device.
- *
- * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
- */
-@RunWith(AndroidJUnit4.class)
-public class ExampleInstrumentedTest {
-    @Test
-    public void useAppContext() {
-        // Context of the app under test.
-        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
-        assertEquals("me.ag2s.epublib.test", appContext.getPackageName());
-    }
-}
\ No newline at end of file
diff --git a/epublib/src/test/java/me/ag2s/epublib/ExampleUnitTest.java b/epublib/src/test/java/me/ag2s/epublib/ExampleUnitTest.java
deleted file mode 100644
index a9ef021cc..000000000
--- a/epublib/src/test/java/me/ag2s/epublib/ExampleUnitTest.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package me.ag2s.epublib;
-
-import org.junit.Test;
-
-import static org.junit.Assert.*;
-
-/**
- * Example local unit test, which will execute on the development machine (host).
- *
- * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
- */
-public class ExampleUnitTest {
-    @Test
-    public void addition_isCorrect() {
-        assertEquals(4, 2 + 2);
-    }
-}
\ No newline at end of file