diff --git a/app/src/main/java/com/huanchengfly/tieba/post/activities/ThemeActivity.kt b/app/src/main/java/com/huanchengfly/tieba/post/activities/ThemeActivity.kt
deleted file mode 100644
index fc4d355b..00000000
--- a/app/src/main/java/com/huanchengfly/tieba/post/activities/ThemeActivity.kt
+++ /dev/null
@@ -1,86 +0,0 @@
-package com.huanchengfly.tieba.post.activities
-
-import android.os.Bundle
-import androidx.appcompat.widget.Toolbar
-import androidx.recyclerview.widget.LinearLayoutManager
-import androidx.recyclerview.widget.RecyclerView
-import androidx.recyclerview.widget.SimpleItemAnimator
-import butterknife.BindView
-import com.huanchengfly.tieba.post.R
-import com.huanchengfly.tieba.post.adapters.ThemeAdapter
-import com.huanchengfly.tieba.post.goToActivity
-import com.huanchengfly.tieba.post.interfaces.OnItemClickListener
-import com.huanchengfly.tieba.post.utils.DialogUtil
-import com.huanchengfly.tieba.post.utils.ThemeUtil
-
-class ThemeActivity : BaseActivity() {
-    @BindView(R.id.theme_list)
-    lateinit var mRecyclerView: RecyclerView
-
-    override fun getLayoutId(): Int {
-        return R.layout.activity_theme
-    }
-
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        mRecyclerView.layoutManager = LinearLayoutManager(this)
-        val themeAdapter = ThemeAdapter(this)
-        mRecyclerView.adapter = themeAdapter
-        if (mRecyclerView.itemAnimator != null) {
-            mRecyclerView.itemAnimator!!.addDuration = 0
-            mRecyclerView.itemAnimator!!.changeDuration = 0
-            mRecyclerView.itemAnimator!!.moveDuration = 0
-            mRecyclerView.itemAnimator!!.removeDuration = 0
-            (mRecyclerView.itemAnimator as SimpleItemAnimator?)!!.supportsChangeAnimations = false
-        }
-        val toolbar = findViewById(R.id.toolbar) as Toolbar
-        setSupportActionBar(toolbar)
-        val actionBar = supportActionBar
-        if (actionBar != null) {
-            actionBar.setDisplayHomeAsUpEnabled(true)
-            actionBar.setTitle(R.string.title_theme)
-        }
-        val values = listOf(*resources.getStringArray(R.array.theme_values))
-        themeAdapter.onItemClickListener = OnItemClickListener { _, _, position: Int, _ ->
-            val backgroundFilePath = appPreferences.translucentThemeBackgroundPath
-            val theme = values[position]
-            if (theme == ThemeUtil.THEME_TRANSLUCENT && backgroundFilePath == null) {
-                goToActivity<TranslucentThemeActivity>()
-            }
-            if (ThemeUtil.isNightMode(theme) != ThemeUtil.isNightMode(appPreferences.theme)) {
-                DialogUtil.build(this)
-                        .setMessage(R.string.message_dialog_follow_system_night)
-                        .setPositiveButton(R.string.btn_keep_following) { _, _ ->
-                            themeAdapter.refresh()
-                        }
-                        .setNegativeButton(R.string.btn_close_following) { _, _ ->
-                            appPreferences.followSystemNight = false
-                            setTheme(theme)
-                        }
-                        .show()
-            } else {
-                setTheme(theme)
-            }
-        }
-        mRecyclerView.adapter = themeAdapter
-        ThemeUtil.setTranslucentThemeBackground(findViewById(R.id.background))
-    }
-
-    override fun onResume() {
-        super.onResume()
-        ThemeUtil.setTranslucentThemeBackground(findViewById(R.id.background))
-    }
-
-    private fun setTheme(theme: String) {
-        appPreferences.theme = theme
-        if (!theme.contains("dark")) {
-            appPreferences.oldTheme = theme
-        }
-        refreshUIIfNeed()
-        ThemeUtil.setTranslucentThemeBackground(findViewById(R.id.background))
-    }
-
-    companion object {
-        const val TAG = "ThemeActivity"
-    }
-}
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_theme.xml b/app/src/main/res/layout/activity_theme.xml
deleted file mode 100644
index 56634c6c..00000000
--- a/app/src/main/res/layout/activity_theme.xml
+++ /dev/null
@@ -1,20 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<com.huanchengfly.tieba.post.widgets.theme.TintCoordinatorLayout
-    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"
-    android:id="@+id/background"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context=".activities.ThemeActivity">
-
-    <include
-        layout="@layout/layout_appbar" />
-
-    <androidx.recyclerview.widget.RecyclerView
-        android:id="@+id/theme_list"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
-
-</com.huanchengfly.tieba.post.widgets.theme.TintCoordinatorLayout>
\ No newline at end of file