diff --git a/entry/build.gradle b/entry/build.gradle
index c9862d851cf39fcbcc63b425d8f5721b381ab40b..722c409dae0915490bf0558cf7583beabead4ef8 100644
--- a/entry/build.gradle
+++ b/entry/build.gradle
@@ -19,12 +19,15 @@ dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar', '*.har'])
     testImplementation 'junit:junit:4.13'
     ohosTestImplementation 'com.huawei.ohos.testkit:runner:1.0.0.200'
+
 //    implementation project(':library')
 //    implementation project(':glide_loader')
-    implementation('com.gitee.chinasoft_ohos:ScrollGalleryView-library:0.0.2-SNAPSHOT')
-    implementation('com.gitee.chinasoft_ohos:ScrollGalleryView-glide:0.0.2-SNAPSHOT')
-//    implementation('com.gitee.chinasoft_ohos:ScrollGalleryView-fresco:0.0.1-SNAPSHOT')
-//    implementation('com.gitee.chinasoft_ohos:ScrollGalleryView-picasso:0.0.1-SNAPSHOT')
+//    implementation project(':fresco_loader')
+//    implementation project(':picasso_loader')
+      implementation('com.gitee.chinasoft_ohos:ScrollGalleryView-library:0.0.2-SNAPSHOT')
+      implementation('com.gitee.chinasoft_ohos:ScrollGalleryView-glide:0.0.2-SNAPSHOT')
+//    implementation('com.gitee.chinasoft_ohos:ScrollGalleryView-fresco:0.0.2-SNAPSHOT')
+//    implementation('com.gitee.chinasoft_ohos:ScrollGalleryView-picasso:0.0.2-SNAPSHOT')
 }
 decc {
     supportType = ['html', 'xml']
diff --git a/entry/src/main/java/com/veinhorn/scrollgalleryview/example/builder/MainAbility.java b/entry/src/main/java/com/veinhorn/scrollgalleryview/example/builder/MainAbility.java
index a1ddf3490d1a4a15f2282b8d018662d623759da2..c683a64d9fa48d64bd4bdf8e0226e3204fcd4314 100644
--- a/entry/src/main/java/com/veinhorn/scrollgalleryview/example/builder/MainAbility.java
+++ b/entry/src/main/java/com/veinhorn/scrollgalleryview/example/builder/MainAbility.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/entry/src/main/java/com/veinhorn/scrollgalleryview/example/builder/MyApplication.java b/entry/src/main/java/com/veinhorn/scrollgalleryview/example/builder/MyApplication.java
index 35b193fa128d194391a5c254baa9283b674eff3a..2e9381800df82c46e5ac99376ff9fe9354c145e4 100644
--- a/entry/src/main/java/com/veinhorn/scrollgalleryview/example/builder/MyApplication.java
+++ b/entry/src/main/java/com/veinhorn/scrollgalleryview/example/builder/MyApplication.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/entry/src/ohosTest/java/com/veinhorn/scrollgalleryview/example/builder/ExampleOhosTest.java b/entry/src/ohosTest/java/com/veinhorn/scrollgalleryview/example/builder/ExampleOhosTest.java
index 640bd556bbca64681a4101d8c8cc65e030c47095..b0b6a7828841b868d7c6ac492a54aa3fd8424799 100644
--- a/entry/src/ohosTest/java/com/veinhorn/scrollgalleryview/example/builder/ExampleOhosTest.java
+++ b/entry/src/ohosTest/java/com/veinhorn/scrollgalleryview/example/builder/ExampleOhosTest.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/entry/src/test/java/com/veinhorn/scrollgalleryview/example/builder/ExampleTest.java b/entry/src/test/java/com/veinhorn/scrollgalleryview/example/builder/ExampleTest.java
index d8f20ef4ed7a92cb27e7a496755bfd907e271fee..3b3f2c4b630c0a5df373c3f5bcdf2f490ff27970 100644
--- a/entry/src/test/java/com/veinhorn/scrollgalleryview/example/builder/ExampleTest.java
+++ b/entry/src/test/java/com/veinhorn/scrollgalleryview/example/builder/ExampleTest.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/fresco_loader/src/test/java/com/ayokunlepaul/frescoloader/ExampleTest.java b/fresco_loader/src/test/java/com/ayokunlepaul/frescoloader/ExampleTest.java
index 8e57255f419494e07ba6ad7fd632efd7630efdbc..0d8dcd4df2c28385e098b3b79c79e81760b5be3c 100644
--- a/fresco_loader/src/test/java/com/ayokunlepaul/frescoloader/ExampleTest.java
+++ b/fresco_loader/src/test/java/com/ayokunlepaul/frescoloader/ExampleTest.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/glide_loader/src/main/java/ogbe/ozioma/com/glideimageloader/GlideImageLoader.java b/glide_loader/src/main/java/ogbe/ozioma/com/glideimageloader/GlideImageLoader.java
index 45058171d40733a4af0fda3ea420b64785278807..ffbed39a9e86f10bd30f2ac3ba69fe1cc7551d7d 100644
--- a/glide_loader/src/main/java/ogbe/ozioma/com/glideimageloader/GlideImageLoader.java
+++ b/glide_loader/src/main/java/ogbe/ozioma/com/glideimageloader/GlideImageLoader.java
@@ -22,8 +22,8 @@ import org.jetbrains.annotations.Nullable;
  */
 public class GlideImageLoader implements MediaLoader {
     private String mUrl;
-    private int mWidth;
-    private int mHeight;
+//    private int mWidth;
+//    private int mHeight;
 
     /**
      * GlideImageLoader
@@ -43,8 +43,8 @@ public class GlideImageLoader implements MediaLoader {
      */
     public GlideImageLoader(String url, int width, int height) {
         this.mUrl = url;
-        this.mWidth = width;
-        this.mHeight = height;
+//        this.mWidth = width;
+//        this.mHeight = height;
     }
 
     /**
diff --git a/glide_loader/src/test/java/ogbe/ozioma/com/glideimageloader/ExampleTest.java b/glide_loader/src/test/java/ogbe/ozioma/com/glideimageloader/ExampleTest.java
index f1e919da0dceb55624f8cc5659ddf67ed12f83e1..46d35e10991f6c8871775798438f56453ccc4992 100644
--- a/glide_loader/src/test/java/ogbe/ozioma/com/glideimageloader/ExampleTest.java
+++ b/glide_loader/src/test/java/ogbe/ozioma/com/glideimageloader/ExampleTest.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/library/src/main/java/com/veinhorn/scrollgalleryview/ScreenSlidePagerAdapter.java b/library/src/main/java/com/veinhorn/scrollgalleryview/ScreenSlidePagerAdapter.java
index 51f6264e214499b31aa1a7ba60f0542795ceb595..23ca8851230009ac2f2ac61325cd4f8bacf00a70 100644
--- a/library/src/main/java/com/veinhorn/scrollgalleryview/ScreenSlidePagerAdapter.java
+++ b/library/src/main/java/com/veinhorn/scrollgalleryview/ScreenSlidePagerAdapter.java
@@ -39,7 +39,7 @@ public class ScreenSlidePagerAdapter extends PageSliderProvider {
         this.mOnImageClickListener = onImageClickListener;
         this.mContext = context;
         this.mOnImageLongClickListener = onImageLongClickListener;
-        imageFragmentList = new ArrayList<>();
+//        imageFragmentList = new ArrayList<>();
         imageFragmentList = getImageComponent();
     }
 
diff --git a/library/src/main/java/com/veinhorn/scrollgalleryview/ScrollGalleryView.java b/library/src/main/java/com/veinhorn/scrollgalleryview/ScrollGalleryView.java
index a89f9fcd7288c80527b9bd5079f750d24662f16d..e38904e63fde7ba21acaeaf184e8def8903f2512 100644
--- a/library/src/main/java/com/veinhorn/scrollgalleryview/ScrollGalleryView.java
+++ b/library/src/main/java/com/veinhorn/scrollgalleryview/ScrollGalleryView.java
@@ -54,8 +54,8 @@ public class ScrollGalleryView extends DirectionalLayout {
     private HackyViewPager viewPager;
 
     // Transitions
-    private Transition mThumbnailsTransition;
-    private boolean isUseDefaultThumbnailsTransition;
+//    private Transition mThumbnailsTransition;
+//    private boolean isUseDefaultThumbnailsTransition;
 
     // Listeners
     private final PageSlider.PageChangedListener viewPagerChangeListener = new PageSlider.PageChangedListener() {
@@ -321,7 +321,7 @@ public class ScrollGalleryView extends DirectionalLayout {
         if (!mIsThumbnailsHidden) {
             this.mIsHideThumbnailsOnClick = isHideThumbnailsOnClick;
             if (isHideThumbnailsOnClick) {
-                this.isUseDefaultThumbnailsTransition = true;
+//                this.isUseDefaultThumbnailsTransition = true;
             }
         }
         return this;
@@ -337,7 +337,7 @@ public class ScrollGalleryView extends DirectionalLayout {
     public ScrollGalleryView hideThumbnailsOnClick(boolean isHideThumbnailsOnClick, Transition thumbnailsTransition) {
         if (!mIsThumbnailsHidden) {
             this.mIsHideThumbnailsOnClick = isHideThumbnailsOnClick;
-            this.mThumbnailsTransition = thumbnailsTransition;
+//            this.mThumbnailsTransition = thumbnailsTransition;
         }
         return this;
     }
diff --git a/library/src/main/java/com/veinhorn/scrollgalleryview/util/FactoryUtil.java b/library/src/main/java/com/veinhorn/scrollgalleryview/util/FactoryUtil.java
index 7beef851e0eb807ff6f3b2b19d12cc08e71b8866..4f56dc29969024aa4609ddcc57a60ea9b230f5d0 100644
--- a/library/src/main/java/com/veinhorn/scrollgalleryview/util/FactoryUtil.java
+++ b/library/src/main/java/com/veinhorn/scrollgalleryview/util/FactoryUtil.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/library/src/main/java/com/veinhorn/scrollgalleryview/util/LogUtil.java b/library/src/main/java/com/veinhorn/scrollgalleryview/util/LogUtil.java
index e9b254b673a88d1bcccda309a04c2073fe40b53c..76bc00260b22cb3d798e19955cf9df4db7f789f7 100644
--- a/library/src/main/java/com/veinhorn/scrollgalleryview/util/LogUtil.java
+++ b/library/src/main/java/com/veinhorn/scrollgalleryview/util/LogUtil.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/library/src/test/java/com/veinhorn/scrollgalleryview/ExampleTest.java b/library/src/test/java/com/veinhorn/scrollgalleryview/ExampleTest.java
index 5f5a20952d94f8a3f81873e3fdf1bce4a2e85812..e7d380b6760f24dc005ee1dee13aedc2d7d67a53 100644
--- a/library/src/test/java/com/veinhorn/scrollgalleryview/ExampleTest.java
+++ b/library/src/test/java/com/veinhorn/scrollgalleryview/ExampleTest.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/picasso_loader/src/test/java/com/veinhorn/scrollgalleryview/loader/picasso/ExampleTest.java b/picasso_loader/src/test/java/com/veinhorn/scrollgalleryview/loader/picasso/ExampleTest.java
index b2ca2794e114b8a6bf8aedcb1a005db27f6fda9c..c9cebb5ac0429455b5f0f6230db8d460c1dc1cee 100644
--- a/picasso_loader/src/test/java/com/veinhorn/scrollgalleryview/loader/picasso/ExampleTest.java
+++ b/picasso_loader/src/test/java/com/veinhorn/scrollgalleryview/loader/picasso/ExampleTest.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/HmPlayer.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/HmPlayer.java
index 12035d137af59bfa0f024d65aec3d4354cc7785d..7d1eab4a9c9395732ad58d7a58b0af40b28cc8bd 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/HmPlayer.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/HmPlayer.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ImplLifecycle.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ImplLifecycle.java
index 5184b8300b4930c9f095ca0a6d1bf3ac94d6246f..99c430ba79d732822d506a88d317646ddef7aa6e 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ImplLifecycle.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ImplLifecycle.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ImplPlayModule.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ImplPlayModule.java
index 7160a45fdd6a78c25be6ab2cc38c0385bfbd5ea1..996199fff727d9e15a59ae6a12e627dd44af29f5 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ImplPlayModule.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ImplPlayModule.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ImplPlayer.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ImplPlayer.java
index 9047573cb9b6e7d8e0e6b9474a0a51cceb3a2796..8501a74bdebccec0a8c5213962825ac4bd8f4cc6 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ImplPlayer.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ImplPlayer.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ScreenChangeListener.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ScreenChangeListener.java
index dd601fa26de475424acf35f6450a1ca1aee02f67..8210c68be05f982765203048e4804d712ac96b74 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ScreenChangeListener.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/ScreenChangeListener.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/StatuChangeListener.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/StatuChangeListener.java
index 72f5d871da138c2dc4f9a9594facc5825fdeb190..bff5741892bb169f23436dd05c1dcc8b4e1939f2 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/StatuChangeListener.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/api/StatuChangeListener.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/constant/Constants.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/constant/Constants.java
index 304f63544d674956f75e3de3a51073e3a31fea36..753e21360902f6e686ab8fb0453e9cf3cceb9ff2 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/constant/Constants.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/constant/Constants.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/constant/GestureConst.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/constant/GestureConst.java
index cb55077e8abe8c2f2cb5f44ad15bc129712fc390..79f8040caf5af10679fa8fe18fdec545dda42ba6 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/constant/GestureConst.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/constant/GestureConst.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/constant/PlayerStatu.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/constant/PlayerStatu.java
index a82573b8e101e7c8e012141c372c398332aff2bf..e82d6aa549d39bef029a6d43d324c5c0b204e162 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/constant/PlayerStatu.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/constant/PlayerStatu.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/factory/SourceFactory.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/factory/SourceFactory.java
index 7d1f423bc87692564b1c4702e44fc7207633486b..430008c72cb189c5ebf25cd2df4dd6f16bcf44b6 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/factory/SourceFactory.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/factory/SourceFactory.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/manager/GestureDetector.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/manager/GestureDetector.java
index 4c389e5a95a49e3429fbe50c3b5c151b0120ff52..e7b6b480731dca99f3600374fbc895720860b59b 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/manager/GestureDetector.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/manager/GestureDetector.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
@@ -17,6 +17,7 @@ package com.veinhorn.playerviewlibrary.player.manager;
 
 import com.veinhorn.playerviewlibrary.player.constant.Constants;
 import com.veinhorn.playerviewlibrary.player.constant.GestureConst;
+import com.veinhorn.playerviewlibrary.util.NumberUtil;
 import ohos.agp.components.VelocityDetector;
 import ohos.multimodalinput.event.TouchEvent;
 
@@ -83,18 +84,18 @@ public class GestureDetector {
                     mLastFocusX = focusX;
                     mLastFocusY = focusY;
                 }
-                final int deltaX = (int) (focusX - mDownFocusX);
-                final int deltaY = (int) (focusY - mDownFocusY);
+                final int deltaX = (int) NumberUtil.sub(focusX , mDownFocusX);
+                final int deltaY = (int) NumberUtil.sub(focusY , mDownFocusY);
                 int distanceX = Math.abs(deltaX);
                 int distanceY = Math.abs(deltaY);
                 if (GestureConst.getScaledTouchSlop() > distanceX || GestureConst.getScaledTouchSlop() > distanceY) {
                     if (distanceX >= distanceY) {
                         currentMoveType = MOVING_HORIZONTAL;
-                        float scrollX = mLastFocusX - focusX;
+                        float scrollX = (float) NumberUtil.sub(mLastFocusX , focusX);
                         isHandled = mListener.onTouchMoving(MOVING_HORIZONTAL, focusX, focusY, scrollX);
                     } else {
                         currentMoveType = MOVING_VERTICAL;
-                        float scrollY = mLastFocusY - focusY;
+                        float scrollY = (float) NumberUtil.sub(mLastFocusY , focusY);//mLastFocusY - focusY
                         isHandled = mListener.onTouchMoving(MOVING_VERTICAL, focusX, focusY, scrollY);
                     }
                     mLastFocusX = focusX;
@@ -129,8 +130,8 @@ public class GestureDetector {
             if (skipIndex == index) {
                 continue;
             }
-            sumX += ev.getPointerPosition(index).getX();
-            sumY += ev.getPointerPosition(index).getY();
+            sumX = (float) NumberUtil.add(ev.getPointerPosition(index).getX(),sumX);
+            sumY = (float) NumberUtil.add(ev.getPointerPosition(index).getY(),sumY);
         }
         final int div = isPointerUp ? count - 1 : count;
         float focusX = sumX / div;
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/manager/HmPlayerLifecycle.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/manager/HmPlayerLifecycle.java
index 95d49950d189509e137e8dae7183aa2754c91281..5dc0b1168d5644dd17043acbf946ad50ab0188b6 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/manager/HmPlayerLifecycle.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/manager/HmPlayerLifecycle.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/util/CommonUtils.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/util/CommonUtils.java
index c5b7ae283618e1782df129cf4e019a3271249468..eceb7f4c6ae30abf1abf99aa822828e8b0cc0e6b 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/util/CommonUtils.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/util/CommonUtils.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/util/DateUtils.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/util/DateUtils.java
index cee8703f99ed7945d130c2914c6e30a7f0c1a397..18ff63210a9cb30c78bb5bc306f8bebc82f1b15c 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/util/DateUtils.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/util/DateUtils.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/PlayerGestureView.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/PlayerGestureView.java
index 3d7d3134b12ba7bdd87d7ebf79096d113e2f46fb..f2d0cf5c6ec4b5cd42b2434af2bebf829888383a 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/PlayerGestureView.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/PlayerGestureView.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
@@ -23,6 +23,7 @@ import com.veinhorn.playerviewlibrary.player.constant.PlayerStatu;
 import com.veinhorn.playerviewlibrary.player.manager.GestureDetector;
 import com.veinhorn.playerviewlibrary.player.util.CommonUtils;
 import com.veinhorn.playerviewlibrary.player.util.DateUtils;
+import com.veinhorn.playerviewlibrary.util.NumberUtil;
 import ohos.agp.colors.RgbColor;
 import ohos.agp.components.AttrSet;
 import ohos.agp.components.DirectionalLayout;
@@ -201,7 +202,8 @@ public class PlayerGestureView extends DirectionalLayout implements ImplPlayModu
                 if (getWidth() / Constants.NUMBER_FLOAT_2 <= focusX) {
                     show(PlayerGestureView.LIGHT_BRIGHT_TYPE, "100%");
                 } else {
-                    float volume = player.getVolume() + distance / interval;
+                    double mulValue = NumberUtil.div(distance , interval);
+                    float volume = (float) NumberUtil.add(player.getVolume(),mulValue);//player.getVolume() + distance / interval
                     volume = (volume < 0) ? 0 : Math.min(volume, 1);
                     show(PlayerGestureView.VOLUME_TYPE, (int) (volume * Constants.NUMBER_100) + "%");
                     player.setVolume(volume);
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/PlayerLoading.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/PlayerLoading.java
index 2a4fdc9c66cfaab4db0daa16b8b255f80e913863..4eb1e9be9e190d4e64cc9ddf8ce93ef679a725ee 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/PlayerLoading.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/PlayerLoading.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/PlayerView.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/PlayerView.java
index dcf268dbb9c47fc01042d8ff7e763838742ef638..3f21e9e7b81f16b08c56dd1bcce4690458cf0681 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/PlayerView.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/PlayerView.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/SimplePlayerController.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/SimplePlayerController.java
index be33c137bbde2b8c340f76a2e2f766a85293fadf..b11e357f3ceab77b716b26631e6dba9107cba31d 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/SimplePlayerController.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/player/view/SimplePlayerController.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/util/LogUtil.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/util/LogUtil.java
index ae5a9a6e9376559711f881a78d0bd52e6940e26f..84157fc0feb508494e565c98a52a6a75d0ca1d8d 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/util/LogUtil.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/util/LogUtil.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/util/NumberUtil.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/util/NumberUtil.java
new file mode 100644
index 0000000000000000000000000000000000000000..56e08c10aea0d370ae333edf57007eac878be0f3
--- /dev/null
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/util/NumberUtil.java
@@ -0,0 +1,173 @@
+/*
+ * Copyright (C) 2021 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.veinhorn.playerviewlibrary.util;
+
+/**
+ * 算法工具类
+ *
+ * @since 2021-04-08
+ */
+public class NumberUtil {
+    /**
+     * 默认除法运算精度
+     */
+    private static final int DEF_DIV_SCALE = 16;
+
+    private NumberUtil() {
+    }
+
+    /**
+     * 提供精确的加法运算。
+     *
+     * @param v1 被加数
+     * @param v2 加数
+     * @return 两个参数的和
+     */
+    public static double add(double v1, double v2) {
+        java.math.BigDecimal b1 = new java.math.BigDecimal(Double.toString(v1));
+        java.math.BigDecimal b2 = new java.math.BigDecimal(Double.toString(v2));
+        return b1.add(b2).doubleValue();
+    }
+
+    /**
+     * 提供精确的加法运算。
+     *
+     * @param v1 被加数
+     * @param v2 加数
+     * @return 两个参数的和
+     */
+    public static double add(String v1, String v2) {
+        java.math.BigDecimal b1 = new java.math.BigDecimal(v1);
+        java.math.BigDecimal b2 = new java.math.BigDecimal(v2);
+        return b1.add(b2).doubleValue();
+    }
+
+    /**
+     * 提供精确的减法运算。
+     *
+     * @param v1 被减数
+     * @param v2 减数
+     * @return 两个参数的差
+     */
+    public static double sub(double v1, double v2) {
+        java.math.BigDecimal b1 = new java.math.BigDecimal(Double.toString(v1));
+        java.math.BigDecimal b2 = new java.math.BigDecimal(Double.toString(v2));
+        return b1.subtract(b2).doubleValue();
+    }
+
+    /**
+     * 提供精确的减法运算。
+     *
+     * @param v1 被减数
+     * @param v2 减数
+     * @return 两个参数的差
+     */
+    public static double sub(String v1, String v2) {
+        java.math.BigDecimal b1 = new java.math.BigDecimal(v1);
+        java.math.BigDecimal b2 = new java.math.BigDecimal(v2);
+        return b1.subtract(b2).doubleValue();
+    }
+
+    /**
+     * 提供精确的乘法运算。
+     *
+     * @param v1 被乘数
+     * @param v2 乘数
+     * @return 两个参数的积
+     */
+    public static double mul(double v1, double v2) {
+        java.math.BigDecimal b1 = new java.math.BigDecimal(Double.toString(v1));
+        java.math.BigDecimal b2 = new java.math.BigDecimal(Double.toString(v2));
+        return b1.multiply(b2).doubleValue();
+    }
+
+    /**
+     * 提供精确的乘法运算。
+     *
+     * @param v1 被乘数
+     * @param v2 乘数
+     * @return 两个参数的积
+     */
+    public static double mul(String v1, String v2) {
+        java.math.BigDecimal b1 = new java.math.BigDecimal(v1);
+        java.math.BigDecimal b2 = new java.math.BigDecimal(v2);
+        return b1.multiply(b2).doubleValue();
+    }
+
+    /**
+     * 提供（相对）精确的除法运算，当发生除不尽的情况时，精确到 小数点以后10位，以后的数字四舍五入。
+     *
+     * @param v1 被除数
+     * @param v2 除数
+     * @return 两个参数的商
+     */
+    public static double div(double v1, double v2) {
+        return div(v1, v2, DEF_DIV_SCALE);
+    }
+
+    /**
+     * 提供（相对）精确的除法运算，当发生除不尽的情况时，精确到 小数点以后10位，以后的数字四舍五入。
+     *
+     * @param v1 被除数
+     * @param v2 除数
+     * @return 两个参数的商
+     */
+    public static double div(String v1, String v2) {
+        java.math.BigDecimal b1 = new java.math.BigDecimal(v1);
+        java.math.BigDecimal b2 = new java.math.BigDecimal(v2);
+        return b1.divide(b2, DEF_DIV_SCALE, java.math.BigDecimal.ROUND_HALF_UP).doubleValue();
+    }
+
+    /**
+     * 提供（相对）精确的除法运算。当发生除不尽的情况时，由scale参数指 定精度，以后的数字四舍五入。
+     *
+     * @param v1 被除数
+     * @param v2 除数
+     * @param scale 表示表示需要精确到小数点以后几位。
+     * @return 两个参数的商
+     */
+    public static double div(double v1, double v2, int scale) {
+        java.math.BigDecimal b1 = new java.math.BigDecimal(Double.toString(v1));
+        java.math.BigDecimal b2 = new java.math.BigDecimal(Double.toString(v2));
+        return b1.divide(b2, scale, java.math.BigDecimal.ROUND_HALF_UP).doubleValue();
+    }
+
+    /**
+     * 提供精确的小数位四舍五入处理。
+     *
+     * @param value 需要四舍五入的数字
+     * @param scale 小数点后保留几位
+     * @return 四舍五入后的结果
+     */
+    public static double round(double value, int scale) {
+        java.math.BigDecimal bigDecimal = new java.math.BigDecimal(Double.toString(value));
+        java.math.BigDecimal one = new java.math.BigDecimal("1");
+        return bigDecimal.divide(one, scale, java.math.BigDecimal.ROUND_HALF_UP).doubleValue();
+    }
+
+    /**
+     * 提供精确的小数位四舍五入处理。
+     *
+     * @param value 需要四舍五入的数字
+     * @param scale 小数点后保留几位
+     * @return 四舍五入后的结果
+     */
+    public static double round(String value, int scale) {
+        java.math.BigDecimal bigDecimal = new java.math.BigDecimal(value);
+        java.math.BigDecimal one = new java.math.BigDecimal("1");
+        return bigDecimal.divide(one, scale, java.math.BigDecimal.ROUND_HALF_UP).doubleValue();
+    }
+}
diff --git a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/util/ScreenUtils.java b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/util/ScreenUtils.java
index 8749a1fabacc10fdf2c73aa5a23ba128edadf951..1e660090d9b00395a011fd77cf235c786870eac7 100644
--- a/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/util/ScreenUtils.java
+++ b/playerviewlibrary/src/main/java/com/veinhorn/playerviewlibrary/util/ScreenUtils.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/playerviewlibrary/src/test/java/com/veinhorn/playerviewlibrary/ExampleTest.java b/playerviewlibrary/src/test/java/com/veinhorn/playerviewlibrary/ExampleTest.java
index 513e9b79970b9a52dfa83ac46b12462e2d98600f..5531c68356749a6d60013b5c49750f48d60e9422 100644
--- a/playerviewlibrary/src/test/java/com/veinhorn/playerviewlibrary/ExampleTest.java
+++ b/playerviewlibrary/src/test/java/com/veinhorn/playerviewlibrary/ExampleTest.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *