diff --git a/android/app/src/main/ic_launcher-playstore.png b/android/app/src/main/ic_launcher-playstore.png
new file mode 100644
index 00000000..f1b97b5b
Binary files /dev/null and b/android/app/src/main/ic_launcher-playstore.png differ
diff --git a/android/app/src/main/kotlin/com/example/toolbox/MainActivity.kt b/android/app/src/main/kotlin/tech/lolli/toolbox/MainActivity.kt
similarity index 77%
rename from android/app/src/main/kotlin/com/example/toolbox/MainActivity.kt
rename to android/app/src/main/kotlin/tech/lolli/toolbox/MainActivity.kt
index c33a370f..1e2849e1 100644
--- a/android/app/src/main/kotlin/com/example/toolbox/MainActivity.kt
+++ b/android/app/src/main/kotlin/tech/lolli/toolbox/MainActivity.kt
@@ -1,4 +1,4 @@
-package com.example.toolbox
+package tech.lolli.toolbox
 
 import io.flutter.embedding.android.FlutterActivity
 
diff --git a/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml b/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
new file mode 100644
index 00000000..036d09bc
--- /dev/null
+++ b/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/ic_launcher_background"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>
\ No newline at end of file
diff --git a/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml b/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
new file mode 100644
index 00000000..036d09bc
--- /dev/null
+++ b/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/ic_launcher_background"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>
\ No newline at end of file
diff --git a/android/app/src/main/res/mipmap-hdpi/ic_launcher.png b/android/app/src/main/res/mipmap-hdpi/ic_launcher.png
deleted file mode 100644
index db77bb4b..00000000
Binary files a/android/app/src/main/res/mipmap-hdpi/ic_launcher.png and /dev/null differ
diff --git a/android/app/src/main/res/mipmap-hdpi/ic_launcher_foreground.png b/android/app/src/main/res/mipmap-hdpi/ic_launcher_foreground.png
new file mode 100644
index 00000000..9732e467
Binary files /dev/null and b/android/app/src/main/res/mipmap-hdpi/ic_launcher_foreground.png differ
diff --git a/android/app/src/main/res/mipmap-hdpi/ic_launcher_round.png b/android/app/src/main/res/mipmap-hdpi/ic_launcher_round.png
new file mode 100644
index 00000000..1f7f222a
Binary files /dev/null and b/android/app/src/main/res/mipmap-hdpi/ic_launcher_round.png differ
diff --git a/android/app/src/main/res/mipmap-mdpi/ic_launcher.png b/android/app/src/main/res/mipmap-mdpi/ic_launcher.png
deleted file mode 100644
index 17987b79..00000000
Binary files a/android/app/src/main/res/mipmap-mdpi/ic_launcher.png and /dev/null differ
diff --git a/android/app/src/main/res/mipmap-mdpi/ic_launcher_foreground.png b/android/app/src/main/res/mipmap-mdpi/ic_launcher_foreground.png
new file mode 100644
index 00000000..b508a0f0
Binary files /dev/null and b/android/app/src/main/res/mipmap-mdpi/ic_launcher_foreground.png differ
diff --git a/android/app/src/main/res/mipmap-mdpi/ic_launcher_round.png b/android/app/src/main/res/mipmap-mdpi/ic_launcher_round.png
new file mode 100644
index 00000000..3ca71469
Binary files /dev/null and b/android/app/src/main/res/mipmap-mdpi/ic_launcher_round.png differ
diff --git a/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png
deleted file mode 100644
index 09d43914..00000000
Binary files a/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png and /dev/null differ
diff --git a/android/app/src/main/res/mipmap-xhdpi/ic_launcher_foreground.png b/android/app/src/main/res/mipmap-xhdpi/ic_launcher_foreground.png
new file mode 100644
index 00000000..8810217f
Binary files /dev/null and b/android/app/src/main/res/mipmap-xhdpi/ic_launcher_foreground.png differ
diff --git a/android/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png b/android/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
new file mode 100644
index 00000000..9af29816
Binary files /dev/null and b/android/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png differ
diff --git a/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
deleted file mode 100644
index d5f1c8d3..00000000
Binary files a/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png and /dev/null differ
diff --git a/android/app/src/main/res/mipmap-xxhdpi/ic_launcher_foreground.png b/android/app/src/main/res/mipmap-xxhdpi/ic_launcher_foreground.png
new file mode 100644
index 00000000..90e10994
Binary files /dev/null and b/android/app/src/main/res/mipmap-xxhdpi/ic_launcher_foreground.png differ
diff --git a/android/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png b/android/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
new file mode 100644
index 00000000..b30668fe
Binary files /dev/null and b/android/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png differ
diff --git a/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
deleted file mode 100644
index 4d6372ee..00000000
Binary files a/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png and /dev/null differ
diff --git a/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_foreground.png b/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_foreground.png
new file mode 100644
index 00000000..42e9e2c0
Binary files /dev/null and b/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_foreground.png differ
diff --git a/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png b/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
new file mode 100644
index 00000000..ae44d42c
Binary files /dev/null and b/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png differ
diff --git a/android/app/src/main/res/values/ic_launcher_background.xml b/android/app/src/main/res/values/ic_launcher_background.xml
new file mode 100644
index 00000000..dc0d296f
--- /dev/null
+++ b/android/app/src/main/res/values/ic_launcher_background.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="ic_launcher_background">#083963</color>
+</resources>
\ No newline at end of file
diff --git a/ios/build/Pods.build/Release-iphonesimulator/Flutter.build/dgph b/ios/build/Pods.build/Release-iphonesimulator/Flutter.build/dgph
new file mode 100644
index 00000000..c64f034c
Binary files /dev/null and b/ios/build/Pods.build/Release-iphonesimulator/Flutter.build/dgph differ
diff --git a/ios/build/Pods.build/Release-iphonesimulator/Pods-Runner.build/dgph b/ios/build/Pods.build/Release-iphonesimulator/Pods-Runner.build/dgph
new file mode 100644
index 00000000..c64f034c
Binary files /dev/null and b/ios/build/Pods.build/Release-iphonesimulator/Pods-Runner.build/dgph differ
diff --git a/ios/build/Pods.build/Release-iphonesimulator/countly_flutter.build/dgph b/ios/build/Pods.build/Release-iphonesimulator/countly_flutter.build/dgph
new file mode 100644
index 00000000..c64f034c
Binary files /dev/null and b/ios/build/Pods.build/Release-iphonesimulator/countly_flutter.build/dgph differ
diff --git a/ios/build/Pods.build/Release-iphonesimulator/path_provider.build/dgph b/ios/build/Pods.build/Release-iphonesimulator/path_provider.build/dgph
new file mode 100644
index 00000000..c64f034c
Binary files /dev/null and b/ios/build/Pods.build/Release-iphonesimulator/path_provider.build/dgph differ
diff --git a/ios/build/Pods.build/Release-iphonesimulator/url_launcher.build/dgph b/ios/build/Pods.build/Release-iphonesimulator/url_launcher.build/dgph
new file mode 100644
index 00000000..c64f034c
Binary files /dev/null and b/ios/build/Pods.build/Release-iphonesimulator/url_launcher.build/dgph differ
diff --git a/lib/page/convert.dart b/lib/page/convert.dart
index fe0a8b5a..0af7a8a4 100644
--- a/lib/page/convert.dart
+++ b/lib/page/convert.dart
@@ -102,9 +102,33 @@ class _EncodePageState extends State<EncodePage>
   Widget _buildTypeOption() {
     return Card(
       child: ExpansionTile(
-        title: Text(
+        leading: TextButton(
+          child: SizedBox(
+            width: _media.size.width * 0.2,
+            child: Row(
+            children: const [
+              Icon(Icons.change_circle),
+              Text('上下交换')
+            ],
+          ),
+          ),
+          onPressed: () {
+            final temp = _textEditingController.text;
+            _textEditingController.text = _textEditingControllerResult.text;
+            _textEditingControllerResult.text = temp;
+          },
+        ),
+        title: SizedBox(
+          width: _media.size.width * 0.4,
+          child: Row(
+            children: [
+              const VerticalDivider(width: 2, thickness: 2, indent: 2, endIndent: 2,),
+              Text(
           _typeOption[_typeOptionIndex],
           style: const TextStyle(fontSize: 16.0, fontWeight: FontWeight.w500),
+        )
+            ],
+          ),
         ),
         children: _typeOption
             .map((e) => ListTile(