diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 28822e4..c4a50de 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -80,7 +80,9 @@
         <activity android:name=".ui.DisplayMapActivity" />
         <activity android:name=".ui.CaseOnMapActivity" />
         <activity android:name=".ui.PublicToiletActivity" />
-        <activity android:name=".ui.BigImageActivity" />
+        <activity
+            android:name=".ui.BigImageActivity"
+            android:theme="@style/Theme.BigImageActivity" />
         <activity
             android:name=".ui.CaseUploadActivity"
             android:configChanges="orientation|screenSize|keyboardHidden"

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 28822e4..c4a50de 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -80,7 +80,9 @@
         <activity android:name=".ui.DisplayMapActivity" />
         <activity android:name=".ui.CaseOnMapActivity" />
         <activity android:name=".ui.PublicToiletActivity" />
-        <activity android:name=".ui.BigImageActivity" />
+        <activity
+            android:name=".ui.BigImageActivity"
+            android:theme="@style/Theme.BigImageActivity" />
         <activity
             android:name=".ui.CaseUploadActivity"
             android:configChanges="orientation|screenSize|keyboardHidden"
diff --git a/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java b/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
index f37457c..3d6ad31 100644
--- a/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
+++ b/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
@@ -2,7 +2,6 @@
 
 import android.annotation.SuppressLint;
 import android.content.Context;
-import android.graphics.Color;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -31,6 +30,8 @@
 
     @BindView(R.id.imagePagerView)
     ViewPager imagePagerView;
+    @BindView(R.id.leftBackView)
+    ImageView leftBackView;
     @BindView(R.id.pageNumberView)
     TextView pageNumberView;
 
@@ -41,6 +42,7 @@
         ButterKnife.bind(this);
 
         initEvent();
+        leftBackView.setOnClickListener(v -> finish());
     }
 
     @SuppressLint("SetTextI18n")
@@ -51,7 +53,6 @@
             return;
         }
         pageNumberView.setText("(" + (index + 1) + "/" + urls.size() + ")");
-        pageNumberView.setTextColor(Color.RED);
         imagePagerView.setAdapter(new BigImageAdapter(this, urls));
         imagePagerView.setCurrentItem(index);
         imagePagerView.setOffscreenPageLimit(2);//设置预加载数量
@@ -65,7 +66,6 @@
             @Override
             public void onPageSelected(int position) {
                 pageNumberView.setText("(" + (position + 1) + "/" + urls.size() + ")");
-                pageNumberView.setTextColor(Color.RED);
             }
 
             @Override

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 28822e4..c4a50de 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -80,7 +80,9 @@
         <activity android:name=".ui.DisplayMapActivity" />
         <activity android:name=".ui.CaseOnMapActivity" />
         <activity android:name=".ui.PublicToiletActivity" />
-        <activity android:name=".ui.BigImageActivity" />
+        <activity
+            android:name=".ui.BigImageActivity"
+            android:theme="@style/Theme.BigImageActivity" />
         <activity
             android:name=".ui.CaseUploadActivity"
             android:configChanges="orientation|screenSize|keyboardHidden"
diff --git a/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java b/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
index f37457c..3d6ad31 100644
--- a/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
+++ b/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
@@ -2,7 +2,6 @@
 
 import android.annotation.SuppressLint;
 import android.content.Context;
-import android.graphics.Color;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -31,6 +30,8 @@
 
     @BindView(R.id.imagePagerView)
     ViewPager imagePagerView;
+    @BindView(R.id.leftBackView)
+    ImageView leftBackView;
     @BindView(R.id.pageNumberView)
     TextView pageNumberView;
 
@@ -41,6 +42,7 @@
         ButterKnife.bind(this);
 
         initEvent();
+        leftBackView.setOnClickListener(v -> finish());
     }
 
     @SuppressLint("SetTextI18n")
@@ -51,7 +53,6 @@
             return;
         }
         pageNumberView.setText("(" + (index + 1) + "/" + urls.size() + ")");
-        pageNumberView.setTextColor(Color.RED);
         imagePagerView.setAdapter(new BigImageAdapter(this, urls));
         imagePagerView.setCurrentItem(index);
         imagePagerView.setOffscreenPageLimit(2);//设置预加载数量
@@ -65,7 +66,6 @@
             @Override
             public void onPageSelected(int position) {
                 pageNumberView.setText("(" + (position + 1) + "/" + urls.size() + ")");
-                pageNumberView.setTextColor(Color.RED);
             }
 
             @Override
diff --git a/app/src/main/res/anim/activity_in.xml b/app/src/main/res/anim/activity_in.xml
new file mode 100644
index 0000000..f2696ba
--- /dev/null
+++ b/app/src/main/res/anim/activity_in.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <alpha
+        android:duration="500"
+        android:fromAlpha="0.0"
+        android:toAlpha="1.0" />
+</set>
\ No newline at end of file

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 28822e4..c4a50de 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -80,7 +80,9 @@
         <activity android:name=".ui.DisplayMapActivity" />
         <activity android:name=".ui.CaseOnMapActivity" />
         <activity android:name=".ui.PublicToiletActivity" />
-        <activity android:name=".ui.BigImageActivity" />
+        <activity
+            android:name=".ui.BigImageActivity"
+            android:theme="@style/Theme.BigImageActivity" />
         <activity
             android:name=".ui.CaseUploadActivity"
             android:configChanges="orientation|screenSize|keyboardHidden"
diff --git a/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java b/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
index f37457c..3d6ad31 100644
--- a/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
+++ b/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
@@ -2,7 +2,6 @@
 
 import android.annotation.SuppressLint;
 import android.content.Context;
-import android.graphics.Color;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -31,6 +30,8 @@
 
     @BindView(R.id.imagePagerView)
     ViewPager imagePagerView;
+    @BindView(R.id.leftBackView)
+    ImageView leftBackView;
     @BindView(R.id.pageNumberView)
     TextView pageNumberView;
 
@@ -41,6 +42,7 @@
         ButterKnife.bind(this);
 
         initEvent();
+        leftBackView.setOnClickListener(v -> finish());
     }
 
     @SuppressLint("SetTextI18n")
@@ -51,7 +53,6 @@
             return;
         }
         pageNumberView.setText("(" + (index + 1) + "/" + urls.size() + ")");
-        pageNumberView.setTextColor(Color.RED);
         imagePagerView.setAdapter(new BigImageAdapter(this, urls));
         imagePagerView.setCurrentItem(index);
         imagePagerView.setOffscreenPageLimit(2);//设置预加载数量
@@ -65,7 +66,6 @@
             @Override
             public void onPageSelected(int position) {
                 pageNumberView.setText("(" + (position + 1) + "/" + urls.size() + ")");
-                pageNumberView.setTextColor(Color.RED);
             }
 
             @Override
diff --git a/app/src/main/res/anim/activity_in.xml b/app/src/main/res/anim/activity_in.xml
new file mode 100644
index 0000000..f2696ba
--- /dev/null
+++ b/app/src/main/res/anim/activity_in.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <alpha
+        android:duration="500"
+        android:fromAlpha="0.0"
+        android:toAlpha="1.0" />
+</set>
\ No newline at end of file
diff --git a/app/src/main/res/anim/activity_out.xml b/app/src/main/res/anim/activity_out.xml
new file mode 100644
index 0000000..1e424a5
--- /dev/null
+++ b/app/src/main/res/anim/activity_out.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <alpha
+        android:duration="500"
+        android:fromAlpha="1.0"
+        android:toAlpha="0.0" />
+</set>
\ No newline at end of file

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 28822e4..c4a50de 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -80,7 +80,9 @@
         <activity android:name=".ui.DisplayMapActivity" />
         <activity android:name=".ui.CaseOnMapActivity" />
         <activity android:name=".ui.PublicToiletActivity" />
-        <activity android:name=".ui.BigImageActivity" />
+        <activity
+            android:name=".ui.BigImageActivity"
+            android:theme="@style/Theme.BigImageActivity" />
         <activity
             android:name=".ui.CaseUploadActivity"
             android:configChanges="orientation|screenSize|keyboardHidden"
diff --git a/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java b/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
index f37457c..3d6ad31 100644
--- a/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
+++ b/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
@@ -2,7 +2,6 @@
 
 import android.annotation.SuppressLint;
 import android.content.Context;
-import android.graphics.Color;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -31,6 +30,8 @@
 
     @BindView(R.id.imagePagerView)
     ViewPager imagePagerView;
+    @BindView(R.id.leftBackView)
+    ImageView leftBackView;
     @BindView(R.id.pageNumberView)
     TextView pageNumberView;
 
@@ -41,6 +42,7 @@
         ButterKnife.bind(this);
 
         initEvent();
+        leftBackView.setOnClickListener(v -> finish());
     }
 
     @SuppressLint("SetTextI18n")
@@ -51,7 +53,6 @@
             return;
         }
         pageNumberView.setText("(" + (index + 1) + "/" + urls.size() + ")");
-        pageNumberView.setTextColor(Color.RED);
         imagePagerView.setAdapter(new BigImageAdapter(this, urls));
         imagePagerView.setCurrentItem(index);
         imagePagerView.setOffscreenPageLimit(2);//设置预加载数量
@@ -65,7 +66,6 @@
             @Override
             public void onPageSelected(int position) {
                 pageNumberView.setText("(" + (position + 1) + "/" + urls.size() + ")");
-                pageNumberView.setTextColor(Color.RED);
             }
 
             @Override
diff --git a/app/src/main/res/anim/activity_in.xml b/app/src/main/res/anim/activity_in.xml
new file mode 100644
index 0000000..f2696ba
--- /dev/null
+++ b/app/src/main/res/anim/activity_in.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <alpha
+        android:duration="500"
+        android:fromAlpha="0.0"
+        android:toAlpha="1.0" />
+</set>
\ No newline at end of file
diff --git a/app/src/main/res/anim/activity_out.xml b/app/src/main/res/anim/activity_out.xml
new file mode 100644
index 0000000..1e424a5
--- /dev/null
+++ b/app/src/main/res/anim/activity_out.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <alpha
+        android:duration="500"
+        android:fromAlpha="1.0"
+        android:toAlpha="0.0" />
+</set>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_big_image.xml b/app/src/main/res/layout/activity_big_image.xml
index 5bfb6f3..e042128 100644
--- a/app/src/main/res/layout/activity_big_image.xml
+++ b/app/src/main/res/layout/activity_big_image.xml
@@ -14,12 +14,21 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent" />
 
+        <ImageView
+            android:id="@+id/leftBackView"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="@dimen/margin_10dp"
+            android:layout_marginTop="@dimen/margin_10dp"
+            android:src="@drawable/ic_left_white" />
+
         <TextView
             android:id="@+id/pageNumberView"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_gravity="bottom|center_horizontal"
-            android:layout_marginBottom="@dimen/margin_10dp"
-            android:textSize="@dimen/textFontSize" />
+            android:layout_gravity="top|center_horizontal"
+            android:layout_marginTop="@dimen/margin_10dp"
+            android:textColor="@color/white"
+            android:textSize="20sp" />
     </FrameLayout>
 </LinearLayout>
\ No newline at end of file

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 28822e4..c4a50de 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -80,7 +80,9 @@
         <activity android:name=".ui.DisplayMapActivity" />
         <activity android:name=".ui.CaseOnMapActivity" />
         <activity android:name=".ui.PublicToiletActivity" />
-        <activity android:name=".ui.BigImageActivity" />
+        <activity
+            android:name=".ui.BigImageActivity"
+            android:theme="@style/Theme.BigImageActivity" />
         <activity
             android:name=".ui.CaseUploadActivity"
             android:configChanges="orientation|screenSize|keyboardHidden"
diff --git a/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java b/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
index f37457c..3d6ad31 100644
--- a/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
+++ b/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
@@ -2,7 +2,6 @@
 
 import android.annotation.SuppressLint;
 import android.content.Context;
-import android.graphics.Color;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -31,6 +30,8 @@
 
     @BindView(R.id.imagePagerView)
     ViewPager imagePagerView;
+    @BindView(R.id.leftBackView)
+    ImageView leftBackView;
     @BindView(R.id.pageNumberView)
     TextView pageNumberView;
 
@@ -41,6 +42,7 @@
         ButterKnife.bind(this);
 
         initEvent();
+        leftBackView.setOnClickListener(v -> finish());
     }
 
     @SuppressLint("SetTextI18n")
@@ -51,7 +53,6 @@
             return;
         }
         pageNumberView.setText("(" + (index + 1) + "/" + urls.size() + ")");
-        pageNumberView.setTextColor(Color.RED);
         imagePagerView.setAdapter(new BigImageAdapter(this, urls));
         imagePagerView.setCurrentItem(index);
         imagePagerView.setOffscreenPageLimit(2);//设置预加载数量
@@ -65,7 +66,6 @@
             @Override
             public void onPageSelected(int position) {
                 pageNumberView.setText("(" + (position + 1) + "/" + urls.size() + ")");
-                pageNumberView.setTextColor(Color.RED);
             }
 
             @Override
diff --git a/app/src/main/res/anim/activity_in.xml b/app/src/main/res/anim/activity_in.xml
new file mode 100644
index 0000000..f2696ba
--- /dev/null
+++ b/app/src/main/res/anim/activity_in.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <alpha
+        android:duration="500"
+        android:fromAlpha="0.0"
+        android:toAlpha="1.0" />
+</set>
\ No newline at end of file
diff --git a/app/src/main/res/anim/activity_out.xml b/app/src/main/res/anim/activity_out.xml
new file mode 100644
index 0000000..1e424a5
--- /dev/null
+++ b/app/src/main/res/anim/activity_out.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <alpha
+        android:duration="500"
+        android:fromAlpha="1.0"
+        android:toAlpha="0.0" />
+</set>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_big_image.xml b/app/src/main/res/layout/activity_big_image.xml
index 5bfb6f3..e042128 100644
--- a/app/src/main/res/layout/activity_big_image.xml
+++ b/app/src/main/res/layout/activity_big_image.xml
@@ -14,12 +14,21 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent" />
 
+        <ImageView
+            android:id="@+id/leftBackView"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="@dimen/margin_10dp"
+            android:layout_marginTop="@dimen/margin_10dp"
+            android:src="@drawable/ic_left_white" />
+
         <TextView
             android:id="@+id/pageNumberView"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_gravity="bottom|center_horizontal"
-            android:layout_marginBottom="@dimen/margin_10dp"
-            android:textSize="@dimen/textFontSize" />
+            android:layout_gravity="top|center_horizontal"
+            android:layout_marginTop="@dimen/margin_10dp"
+            android:textColor="@color/white"
+            android:textSize="20sp" />
     </FrameLayout>
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index dee8e2e..662a156 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -29,31 +29,20 @@
         <item name="android:layout_centerVertical">true</item>
     </style>
 
-    <style name="CustomDialogStyle">
-        <!-- alertDialog窗口背景色 -->
-        <item name="android:windowBackground">@android:color/transparent</item>
-        <!--dialog是否有边框-->
-        <item name="android:windowFrame">@null</item>
-        <!--dialog是否有标题-->
-        <item name="android:windowNoTitle">true</item>
-        <!--是否浮现在activity之上-->
-        <item name="android:windowIsFloating">true</item>
-        <!--是否半透明-->
-        <item name="android:windowIsTranslucent">true</item>
-        <!--是否有遮盖(eg.Activity的闪屏页)-->
-        <item name="android:windowContentOverlay">@null</item>
-        <!--进出动画-->
-        <item name="android:windowAnimationStyle">@android:style/Animation.Translucent</item>
-        <!--背景是否模糊显示-->
-        <item name="android:backgroundDimEnabled">true</item>
-        <!--显示软件盘-->
-        <item name="android:windowSoftInputMode">stateAlwaysHidden</item>
+    <style name="PopupAnimation">
+        <!-- 指定显示的动画xml -->
+        <item name="android:windowEnterAnimation">@anim/popup_show</item>
+        <!-- 指定消失的动画xml -->
+        <item name="android:windowExitAnimation">@anim/popup_hide</item>
     </style>
 
-    <style name="PopupAnimation">
-        <item name="android:windowEnterAnimation">@anim/popup_show</item>
-        <!-- 指定显示的动画xml -->
-        <item name="android:windowExitAnimation">@anim/popup_hide</item>
-        <!-- 指定消失的动画xml -->
+    <style name="ActivityInOutAnimation" parent="Base.Theme.NoActionBar">
+        <!--进入-->
+        <item name="android:activityOpenEnterAnimation">@anim/activity_in</item>
+        <item name="android:activityOpenExitAnimation">@anim/activity_out</item>
+
+        <!--退出-->
+        <item name="android:activityCloseEnterAnimation">@anim/activity_in</item>
+        <item name="android:activityCloseExitAnimation">@anim/activity_out</item>
     </style>
 </resources>

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 28822e4..c4a50de 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -80,7 +80,9 @@
         <activity android:name=".ui.DisplayMapActivity" />
         <activity android:name=".ui.CaseOnMapActivity" />
         <activity android:name=".ui.PublicToiletActivity" />
-        <activity android:name=".ui.BigImageActivity" />
+        <activity
+            android:name=".ui.BigImageActivity"
+            android:theme="@style/Theme.BigImageActivity" />
         <activity
             android:name=".ui.CaseUploadActivity"
             android:configChanges="orientation|screenSize|keyboardHidden"
diff --git a/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java b/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
index f37457c..3d6ad31 100644
--- a/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
+++ b/app/src/main/java/com/casic/dcms/ui/BigImageActivity.java
@@ -2,7 +2,6 @@
 
 import android.annotation.SuppressLint;
 import android.content.Context;
-import android.graphics.Color;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -31,6 +30,8 @@
 
     @BindView(R.id.imagePagerView)
     ViewPager imagePagerView;
+    @BindView(R.id.leftBackView)
+    ImageView leftBackView;
     @BindView(R.id.pageNumberView)
     TextView pageNumberView;
 
@@ -41,6 +42,7 @@
         ButterKnife.bind(this);
 
         initEvent();
+        leftBackView.setOnClickListener(v -> finish());
     }
 
     @SuppressLint("SetTextI18n")
@@ -51,7 +53,6 @@
             return;
         }
         pageNumberView.setText("(" + (index + 1) + "/" + urls.size() + ")");
-        pageNumberView.setTextColor(Color.RED);
         imagePagerView.setAdapter(new BigImageAdapter(this, urls));
         imagePagerView.setCurrentItem(index);
         imagePagerView.setOffscreenPageLimit(2);//设置预加载数量
@@ -65,7 +66,6 @@
             @Override
             public void onPageSelected(int position) {
                 pageNumberView.setText("(" + (position + 1) + "/" + urls.size() + ")");
-                pageNumberView.setTextColor(Color.RED);
             }
 
             @Override
diff --git a/app/src/main/res/anim/activity_in.xml b/app/src/main/res/anim/activity_in.xml
new file mode 100644
index 0000000..f2696ba
--- /dev/null
+++ b/app/src/main/res/anim/activity_in.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <alpha
+        android:duration="500"
+        android:fromAlpha="0.0"
+        android:toAlpha="1.0" />
+</set>
\ No newline at end of file
diff --git a/app/src/main/res/anim/activity_out.xml b/app/src/main/res/anim/activity_out.xml
new file mode 100644
index 0000000..1e424a5
--- /dev/null
+++ b/app/src/main/res/anim/activity_out.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <alpha
+        android:duration="500"
+        android:fromAlpha="1.0"
+        android:toAlpha="0.0" />
+</set>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_big_image.xml b/app/src/main/res/layout/activity_big_image.xml
index 5bfb6f3..e042128 100644
--- a/app/src/main/res/layout/activity_big_image.xml
+++ b/app/src/main/res/layout/activity_big_image.xml
@@ -14,12 +14,21 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent" />
 
+        <ImageView
+            android:id="@+id/leftBackView"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="@dimen/margin_10dp"
+            android:layout_marginTop="@dimen/margin_10dp"
+            android:src="@drawable/ic_left_white" />
+
         <TextView
             android:id="@+id/pageNumberView"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_gravity="bottom|center_horizontal"
-            android:layout_marginBottom="@dimen/margin_10dp"
-            android:textSize="@dimen/textFontSize" />
+            android:layout_gravity="top|center_horizontal"
+            android:layout_marginTop="@dimen/margin_10dp"
+            android:textColor="@color/white"
+            android:textSize="20sp" />
     </FrameLayout>
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index dee8e2e..662a156 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -29,31 +29,20 @@
         <item name="android:layout_centerVertical">true</item>
     </style>
 
-    <style name="CustomDialogStyle">
-        <!-- alertDialog窗口背景色 -->
-        <item name="android:windowBackground">@android:color/transparent</item>
-        <!--dialog是否有边框-->
-        <item name="android:windowFrame">@null</item>
-        <!--dialog是否有标题-->
-        <item name="android:windowNoTitle">true</item>
-        <!--是否浮现在activity之上-->
-        <item name="android:windowIsFloating">true</item>
-        <!--是否半透明-->
-        <item name="android:windowIsTranslucent">true</item>
-        <!--是否有遮盖(eg.Activity的闪屏页)-->
-        <item name="android:windowContentOverlay">@null</item>
-        <!--进出动画-->
-        <item name="android:windowAnimationStyle">@android:style/Animation.Translucent</item>
-        <!--背景是否模糊显示-->
-        <item name="android:backgroundDimEnabled">true</item>
-        <!--显示软件盘-->
-        <item name="android:windowSoftInputMode">stateAlwaysHidden</item>
+    <style name="PopupAnimation">
+        <!-- 指定显示的动画xml -->
+        <item name="android:windowEnterAnimation">@anim/popup_show</item>
+        <!-- 指定消失的动画xml -->
+        <item name="android:windowExitAnimation">@anim/popup_hide</item>
     </style>
 
-    <style name="PopupAnimation">
-        <item name="android:windowEnterAnimation">@anim/popup_show</item>
-        <!-- 指定显示的动画xml -->
-        <item name="android:windowExitAnimation">@anim/popup_hide</item>
-        <!-- 指定消失的动画xml -->
+    <style name="ActivityInOutAnimation" parent="Base.Theme.NoActionBar">
+        <!--进入-->
+        <item name="android:activityOpenEnterAnimation">@anim/activity_in</item>
+        <item name="android:activityOpenExitAnimation">@anim/activity_out</item>
+
+        <!--退出-->
+        <item name="android:activityCloseEnterAnimation">@anim/activity_in</item>
+        <item name="android:activityCloseExitAnimation">@anim/activity_out</item>
     </style>
 </resources>
diff --git a/app/src/main/res/values/themes.xml b/app/src/main/res/values/themes.xml
new file mode 100644
index 0000000..064f301
--- /dev/null
+++ b/app/src/main/res/values/themes.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="Theme.BigImageActivity" parent="Theme.AppCompat.Light.NoActionBar">
+        <item name="android:windowAnimationStyle">@style/ActivityInOutAnimation</item>
+    </style>
+</resources>
\ No newline at end of file