diff --git a/app/src/main/java/io/legado/app/constant/AppConst.kt b/app/src/main/java/io/legado/app/constant/AppConst.kt
index 158e1e4b4..6cda954e8 100644
--- a/app/src/main/java/io/legado/app/constant/AppConst.kt
+++ b/app/src/main/java/io/legado/app/constant/AppConst.kt
@@ -1,8 +1,6 @@
 package io.legado.app.constant
 
 import android.annotation.SuppressLint
-import com.google.gson.Gson
-import com.google.gson.GsonBuilder
 import io.legado.app.App
 import io.legado.app.R
 import java.text.SimpleDateFormat
@@ -29,11 +27,32 @@ object AppConst {
         SimpleDateFormat("HH:mm")
     }
 
-    val GSON_CONVERTER: Gson by lazy {
-        GsonBuilder()
-            .disableHtmlEscaping()
-            .setPrettyPrinting()
-            .setDateFormat("yyyy-MM-dd HH:mm:ssZ")
-            .create()
-    }
+    val keyboardToolChars = arrayListOf(
+        "@",
+        "&",
+        "|",
+        "%",
+        "/",
+        ":",
+        "[",
+        "]",
+        "{",
+        "}",
+        "<",
+        ">",
+        "\\",
+        "$",
+        "#",
+        "!",
+        ".",
+        "href",
+        "src",
+        "textNodes",
+        "xpath",
+        "json",
+        "css",
+        "id",
+        "class",
+        "tag"
+    )
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/book/source/edit/SourceEditActivity.kt b/app/src/main/java/io/legado/app/ui/book/source/edit/SourceEditActivity.kt
index b49db48bc..8a2db83d6 100644
--- a/app/src/main/java/io/legado/app/ui/book/source/edit/SourceEditActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/source/edit/SourceEditActivity.kt
@@ -17,6 +17,7 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import com.google.android.material.tabs.TabLayout
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
+import io.legado.app.constant.AppConst
 import io.legado.app.data.entities.BookSource
 import io.legado.app.data.entities.rule.*
 import io.legado.app.lib.theme.ATH
@@ -107,7 +108,7 @@ class SourceEditActivity :
 
     private fun initView() {
         ATH.applyEdgeEffectColor(recycler_view)
-        mSoftKeyboardTool = KeyboardToolPop(this, this)
+        mSoftKeyboardTool = KeyboardToolPop(this, AppConst.keyboardToolChars, this)
         window.decorView.viewTreeObserver.addOnGlobalLayoutListener(KeyboardOnGlobalChangeListener())
         recycler_view.layoutManager = LinearLayoutManager(this)
         recycler_view.adapter = adapter
diff --git a/app/src/main/java/io/legado/app/ui/rss/source/debug/RssSourceDebugActivity.kt b/app/src/main/java/io/legado/app/ui/rss/source/debug/RssSourceDebugActivity.kt
new file mode 100644
index 000000000..de8bf27dc
--- /dev/null
+++ b/app/src/main/java/io/legado/app/ui/rss/source/debug/RssSourceDebugActivity.kt
@@ -0,0 +1,2 @@
+package io.legado.app.ui.rss.source.debug
+
diff --git a/app/src/main/java/io/legado/app/ui/widget/KeyboardToolPop.kt b/app/src/main/java/io/legado/app/ui/widget/KeyboardToolPop.kt
index 076fac6b9..e31afbc0f 100644
--- a/app/src/main/java/io/legado/app/ui/widget/KeyboardToolPop.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/KeyboardToolPop.kt
@@ -4,34 +4,47 @@ import android.annotation.SuppressLint
 import android.content.Context
 import android.view.LayoutInflater
 import android.view.ViewGroup
-import android.widget.LinearLayout
 import android.widget.PopupWindow
-import android.widget.TextView
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
 import io.legado.app.R
+import io.legado.app.base.adapter.ItemViewHolder
+import io.legado.app.base.adapter.SimpleRecyclerAdapter
+import kotlinx.android.synthetic.main.item_text.view.*
+import kotlinx.android.synthetic.main.popup_keyboard_tool.view.*
+import org.jetbrains.anko.sdk27.listeners.onClick
 
 
-class KeyboardToolPop(context: Context, onClickListener: OnClickListener?) :
-    PopupWindow(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT) {
+class KeyboardToolPop(
+    context: Context,
+    private val chars: List<String>,
+    val onClickListener: OnClickListener?
+) : PopupWindow(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT) {
 
     init {
         @SuppressLint("InflateParams")
-        val view = LayoutInflater.from(context).inflate(R.layout.popup_keyboard_tool, null)
-        this.contentView = view
+        this.contentView = LayoutInflater.from(context).inflate(R.layout.popup_keyboard_tool, null)
 
         isTouchable = true
         isOutsideTouchable = false
         isFocusable = false
         inputMethodMode = INPUT_METHOD_NEEDED //解决遮盖输入法
+        initRecyclerView()
+    }
+
+    private fun initRecyclerView() = with(contentView) {
+        val adapter = Adapter(context)
+        recycler_view.layoutManager = LinearLayoutManager(context, RecyclerView.HORIZONTAL, false)
+        recycler_view.adapter = adapter
+        adapter.setItems(chars)
+    }
 
-        val linearLayout = contentView.findViewById<LinearLayout>(R.id.ll_content)
+    inner class Adapter(context: Context) :
+        SimpleRecyclerAdapter<String>(context, R.layout.item_text) {
 
-        for (i in 0 until linearLayout.childCount) {
-            val tv = linearLayout.getChildAt(i) as TextView
-            tv.setOnClickListener { v ->
-                (v as? TextView)?.text.toString().let {
-                    onClickListener?.click(it)
-                }
-            }
+        override fun convert(holder: ItemViewHolder, item: String, payloads: MutableList<Any>) {
+            holder.itemView.text_view.text = item
+            holder.itemView.onClick { onClickListener?.click(item) }
         }
     }
 
diff --git a/app/src/main/res/layout/popup_keyboard_tool.xml b/app/src/main/res/layout/popup_keyboard_tool.xml
index 9a00a80c4..649534d76 100644
--- a/app/src/main/res/layout/popup_keyboard_tool.xml
+++ b/app/src/main/res/layout/popup_keyboard_tool.xml
@@ -1,240 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
-<FrameLayout xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/keyboard_top_view_tip_container"
+<androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/recycler_view"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:layout_gravity="center"
-    android:padding="5dp"
     android:background="@color/background_card"
-    xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <HorizontalScrollView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        tools:ignore="UselessParent">
-
-        <LinearLayout
-            android:id="@+id/ll_content"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:orientation="horizontal">
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="@string/at_char"
-                android:textSize="14sp" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="@string/and_char"
-                android:textSize="14sp" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="|"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="5dp"
-                android:text="%"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="/"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text=":"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="["
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="]"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="{"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="}"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="@string/dsm_start"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="@string/dsm_end"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="\"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="$"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="#"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="!"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="."
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="xpath"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="json"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="css"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="id"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="class"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="tag"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="children"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="href"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="src"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:padding="6dp"
-                android:text="textNodes"
-                android:textSize="14sp"
-                tools:ignore="HardcodedText" />
-
-        </LinearLayout>
-
-    </HorizontalScrollView>
-
-</FrameLayout>
+    android:padding="5dp" />
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index aa63506be..e7c886555 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -392,8 +392,6 @@
     <string name="debug_source">调试书源</string>
     <string name="import_by_qr_code">二维码导入</string>
     <string name="scan_qr_code">扫描二维码</string>
-    <string name="at_char">\@</string>
-    <string name="and_char"><![CDATA[&]]></string>
     <string name="click_on_selected_show_menu">选中时点击可弹出菜单</string>
     <string name="theme">主题</string>
     <string name="default_theme">默认主题</string>