优化

app/src/main/java/io/legado/app/constant/AppLog.kt

@@ -15,4 +15,9 @@ object AppLog {
         mLogs.add(0, Triple(System.currentTimeMillis(), message, throwable))
     }
 
+    @Synchronized
+    fun clear() {
+        mLogs.clear()
+    }
+
 }

app/src/main/java/io/legado/app/ui/about/AppLogDialog.kt

@@ -2,8 +2,10 @@ package io.legado.app.ui.about
 
 import android.content.Context
 import android.os.Bundle
+import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
+import androidx.appcompat.widget.Toolbar
 import androidx.recyclerview.widget.LinearLayoutManager
 import io.legado.app.R
 import io.legado.app.base.BaseDialogFragment
@@ -21,7 +23,8 @@ import io.legado.app.utils.viewbindingdelegate.viewBinding
 import splitties.views.onClick
 import java.util.*
 
-class AppLogDialog : BaseDialogFragment(R.layout.dialog_recycler_view) {
+class AppLogDialog : BaseDialogFragment(R.layout.dialog_recycler_view),
+    Toolbar.OnMenuItemClickListener {
 
     private val binding by viewBinding(DialogRecyclerViewBinding::bind)
     private val adapter by lazy {
@@ -37,12 +40,21 @@ class AppLogDialog : BaseDialogFragment(R.layout.dialog_recycler_view) {
         binding.run {
             toolBar.setBackgroundColor(primaryColor)
             toolBar.setTitle(R.string.log)
+            toolBar.inflateMenu(R.menu.app_log)
+            toolBar.setOnMenuItemClickListener(this@AppLogDialog)
             recyclerView.layoutManager = LinearLayoutManager(requireContext())
             recyclerView.adapter = adapter
         }
         adapter.setItems(AppLog.logs)
     }
 
+    override fun onMenuItemClick(item: MenuItem?): Boolean {
+        when (item?.itemId) {
+            R.id.menu_clear -> AppLog.clear()
+        }
+        return true
+    }
+
     inner class LogAdapter(context: Context) :
         RecyclerAdapter<Triple<Long, String, Throwable?>, ItemAppLogBinding>(context) {
 

app/src/main/res/menu/app_log.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:ignore="AlwaysShowAction">
+
+    <item
+        android:id="@+id/menu_clear"
+        android:title="@string/clear"
+        app:showAsAction="always" />
+
+</menu>