diff --git a/app/src/main/java/com/dazuoye/filemanager/BaseActivity.kt b/app/src/main/java/com/dazuoye/filemanager/BaseActivity.kt
new file mode 100644
index 0000000..d38ec39
--- /dev/null
+++ b/app/src/main/java/com/dazuoye/filemanager/BaseActivity.kt
@@ -0,0 +1,18 @@
+package com.dazuoye.filemanager
+
+import androidx.appcompat.app.AppCompatActivity
+import com.dazuoye.filemanager.fileSystem.DeleteHelper.Companion.delete
+import java.io.File
+
+open class BaseActivity: AppCompatActivity() {
+
+
+  override fun onDestroy() {
+    super.onDestroy()
+    val clipFile = File(this.cacheDir,"clipboard")
+    if (clipFile.exists()){
+      delete(clipFile.path)
+    }
+    System.gc()
+  }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/dazuoye/filemanager/document_page.kt b/app/src/main/java/com/dazuoye/filemanager/document_page.kt
index 2ace693..de260d0 100644
--- a/app/src/main/java/com/dazuoye/filemanager/document_page.kt
+++ b/app/src/main/java/com/dazuoye/filemanager/document_page.kt
@@ -34,7 +34,7 @@ import kotlinx.coroutines.launch
 import org.apache.commons.io.IOUtils
 import java.io.File
 
-class document_page : AppCompatActivity() {
+class document_page : BaseActivity() {
   private var documentList = listOf<String>()
   private val pasteDir = "${Environment.getExternalStorageDirectory().path}/Documents/pasted"
   private var listOrderType = 0
diff --git a/app/src/main/java/com/dazuoye/filemanager/music_page.kt b/app/src/main/java/com/dazuoye/filemanager/music_page.kt
index 15eabab..0f0ee06 100644
--- a/app/src/main/java/com/dazuoye/filemanager/music_page.kt
+++ b/app/src/main/java/com/dazuoye/filemanager/music_page.kt
@@ -35,7 +35,7 @@ import kotlinx.coroutines.launch
 import org.apache.commons.io.IOUtils
 import java.io.File
 
-class music_page : AppCompatActivity() {
+class music_page : BaseActivity() {
   private var musicList = listOf<String>()
   private val pasteDir = "${Environment.getExternalStorageDirectory().path}/Music/pasted"
   private var listOrderType = 0
diff --git a/app/src/main/java/com/dazuoye/filemanager/picture_page.kt b/app/src/main/java/com/dazuoye/filemanager/picture_page.kt
index 01d8ddc..199335b 100644
--- a/app/src/main/java/com/dazuoye/filemanager/picture_page.kt
+++ b/app/src/main/java/com/dazuoye/filemanager/picture_page.kt
@@ -34,7 +34,7 @@ import kotlinx.coroutines.launch
 import org.apache.commons.io.IOUtils
 import java.io.File
 
-class picture_page : AppCompatActivity() {
+class picture_page : BaseActivity() {
   private var imageList = listOf<String>()
   private val pasteDir = "${Environment.getExternalStorageDirectory().path}/Pictures/pasted"
   private var imageListOrderType = 0
@@ -292,9 +292,4 @@ class picture_page : AppCompatActivity() {
       loadingText(loadingTextView, defaultText, next)
     }
   }
-
-  override fun onDestroy() {
-    super.onDestroy()
-    System.gc()
-  }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/dazuoye/filemanager/video_page.kt b/app/src/main/java/com/dazuoye/filemanager/video_page.kt
index cc0f22a..d256625 100644
--- a/app/src/main/java/com/dazuoye/filemanager/video_page.kt
+++ b/app/src/main/java/com/dazuoye/filemanager/video_page.kt
@@ -34,7 +34,7 @@ import kotlinx.coroutines.launch
 import org.apache.commons.io.IOUtils
 import java.io.File
 
-class video_page : AppCompatActivity() {
+class video_page : BaseActivity() {
   private var videoList = listOf<String>()
   private val pasteDir = "${Environment.getExternalStorageDirectory().path}/Movies/pasted"
   private var videoListOrderType = 0