diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 69598c1..104ca1f 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -30,6 +30,11 @@
             android:exported="false"
             android:label="@string/settings_label"
             android:launchMode="singleTask" />
+        <activity
+            android:name=".views.all.AllTasksActivity"
+            android:exported="false"
+            android:label="@string/all_tasks_label"
+            android:launchMode="singleTask" />
         <activity
             android:name=".views.about.AboutActivity"
             android:exported="false"
diff --git a/app/src/main/kotlin/cn/super12138/todo/views/all/AllTasksActivity.kt b/app/src/main/kotlin/cn/super12138/todo/views/all/AllTasksActivity.kt
new file mode 100644
index 0000000..7531df6
--- /dev/null
+++ b/app/src/main/kotlin/cn/super12138/todo/views/all/AllTasksActivity.kt
@@ -0,0 +1,69 @@
+package cn.super12138.todo.views.all
+
+import android.os.Bundle
+import android.view.View
+import android.view.WindowManager
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProvider
+import androidx.recyclerview.widget.LinearLayoutManager
+import cn.super12138.todo.ToDoApplication
+import cn.super12138.todo.databinding.ActivityAllTasksBinding
+import cn.super12138.todo.logic.Repository
+import cn.super12138.todo.views.BaseActivity
+import me.zhanghai.android.fastscroll.FastScrollerBuilder
+
+class AllTasksActivity : BaseActivity() {
+    private lateinit var binding: ActivityAllTasksBinding
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val isSecureMode = Repository.getPreferenceBoolean(this, "secure_mode", false)
+        when (isSecureMode) {
+            true -> window.setFlags(
+                WindowManager.LayoutParams.FLAG_SECURE,
+                WindowManager.LayoutParams.FLAG_SECURE
+            )
+
+            false -> window.clearFlags(WindowManager.LayoutParams.FLAG_SECURE)
+        }
+
+        binding = ActivityAllTasksBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        val viewModel = ViewModelProvider(this)[AllTasksViewModel::class.java]
+
+        val layoutManager = LinearLayoutManager(ToDoApplication.context)
+        binding.allTasksList.layoutManager = layoutManager
+        val adapter = AllTasksAdapter(viewModel.todoListAll)
+        binding.allTasksList.adapter = adapter
+
+        FastScrollerBuilder(binding.allTasksList).apply {
+            useMd2Style()
+            build()
+        }
+
+        binding.toolbar.setNavigationOnClickListener {
+            finish()
+        }
+
+        viewModel.emptyTipVis.observe(this, Observer { visibility ->
+            if (visibility == View.VISIBLE) {
+                binding.allTasksList.alpha = 1f
+                binding.allTasksList.animate().alpha(0f).duration = 200
+                binding.allTasksList.visibility = View.GONE
+
+                binding.emptyTip.alpha = 0f
+                binding.emptyTip.visibility = View.VISIBLE
+                binding.emptyTip.animate().alpha(1f).duration = 200
+            } else {
+                binding.allTasksList.alpha = 0f
+                binding.allTasksList.visibility = View.VISIBLE
+                binding.allTasksList.animate().alpha(1f).duration = 200
+
+                binding.emptyTip.alpha = 1f
+                binding.emptyTip.animate().alpha(0f).duration = 200
+                binding.emptyTip.visibility = View.GONE
+            }
+        })
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/kotlin/cn/super12138/todo/views/all/AllTasksAdapter.kt b/app/src/main/kotlin/cn/super12138/todo/views/all/AllTasksAdapter.kt
new file mode 100644
index 0000000..bc4f28f
--- /dev/null
+++ b/app/src/main/kotlin/cn/super12138/todo/views/all/AllTasksAdapter.kt
@@ -0,0 +1,38 @@
+package cn.super12138.todo.views.all
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
+import cn.super12138.todo.R
+import cn.super12138.todo.logic.model.ToDo
+
+class AllTasksAdapter(private val todoList: MutableList<ToDo>) :
+    RecyclerView.Adapter<AllTasksAdapter.ViewHolder>() {
+
+    inner class ViewHolder(view: View) : RecyclerView.ViewHolder(view) {
+        val todoContext: TextView = view.findViewById(R.id.todo_content_all)
+        val todoSubject: TextView = view.findViewById(R.id.todo_subject_all)
+    }
+
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+        val view = LayoutInflater.from(parent.context)
+            .inflate(R.layout.item_all_tasks, parent, false)
+        return ViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+        val todo = todoList[position]
+        holder.todoContext.text = todo.content
+        holder.todoSubject.text = todo.subject
+        if (!todo.isAnimated) {
+            holder.itemView.alpha = 0f
+            holder.itemView.animate().alpha(1f).duration = 200
+            todo.isAnimated = true
+        }
+    }
+
+    override fun getItemCount() = todoList.size
+}
\ No newline at end of file
diff --git a/app/src/main/kotlin/cn/super12138/todo/views/all/AllTasksViewModel.kt b/app/src/main/kotlin/cn/super12138/todo/views/all/AllTasksViewModel.kt
new file mode 100644
index 0000000..d833540
--- /dev/null
+++ b/app/src/main/kotlin/cn/super12138/todo/views/all/AllTasksViewModel.kt
@@ -0,0 +1,34 @@
+package cn.super12138.todo.views.all
+
+import android.view.View
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import cn.super12138.todo.logic.Repository
+import cn.super12138.todo.logic.model.ToDo
+import kotlinx.coroutines.launch
+
+class AllTasksViewModel : ViewModel() {
+    val emptyTipVis = MutableLiveData<Int>(View.VISIBLE)
+    val todoListAll = ArrayList<ToDo>()
+
+    init {
+        loadToDos()
+    }
+
+    private fun loadToDos() {
+        viewModelScope.launch {
+            val todos = Repository.getAll()
+            var count = 0
+            for (todo in todos) {
+                todoListAll.add(ToDo(todo.uuid, todo.content, todo.subject))
+                count++
+            }
+            if (count == 0) {
+                emptyTipVis.value = View.VISIBLE
+            } else {
+                emptyTipVis.value = View.GONE
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/kotlin/cn/super12138/todo/views/settings/SettingsActivity.kt b/app/src/main/kotlin/cn/super12138/todo/views/settings/SettingsActivity.kt
index ff61a8d..0435292 100644
--- a/app/src/main/kotlin/cn/super12138/todo/views/settings/SettingsActivity.kt
+++ b/app/src/main/kotlin/cn/super12138/todo/views/settings/SettingsActivity.kt
@@ -1,8 +1,8 @@
 package cn.super12138.todo.views.settings
 
+import android.content.Intent
 import android.os.Bundle
 import android.os.Process
-import android.view.WindowManager
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.lifecycle.lifecycleScope
@@ -18,6 +18,7 @@ import cn.super12138.todo.databinding.DialogRestoreBinding
 import cn.super12138.todo.logic.Repository
 import cn.super12138.todo.logic.dao.ToDoRoom
 import cn.super12138.todo.views.BaseActivity
+import cn.super12138.todo.views.main.MainActivity
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.snackbar.Snackbar
 import com.google.gson.Gson
@@ -72,20 +73,15 @@ class SettingsActivity : BaseActivity() {
             }
 
             findPreference<SwitchPreferenceCompat>("secure_mode")?.apply {
-                setOnPreferenceChangeListener { _, newValue ->
-                    when (newValue) {
-                        true -> activity?.window?.setFlags(
-                            WindowManager.LayoutParams.FLAG_SECURE,
-                            WindowManager.LayoutParams.FLAG_SECURE
-                        )
-
-                        false -> activity?.window?.clearFlags(WindowManager.LayoutParams.FLAG_SECURE)
-                    }
+                setOnPreferenceChangeListener { _, _ ->
                     view?.let {
                         Snackbar.make(it, R.string.need_restart_app, Snackbar.LENGTH_LONG)
                             .setAction(R.string.restart_app_now) {
-                                Process.killProcess(Process.myPid())
-                                exitProcess(10)
+                                val intent = Intent(context, MainActivity::class.java).apply {
+                                    flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
+                                }
+                                context.startActivity(intent)
+                                exitProcess(0)
                             }
                             .show()
                     }
diff --git a/app/src/main/kotlin/cn/super12138/todo/views/todo/ToDoFragment.kt b/app/src/main/kotlin/cn/super12138/todo/views/todo/ToDoFragment.kt
index fb21ec2..6f1c8ee 100644
--- a/app/src/main/kotlin/cn/super12138/todo/views/todo/ToDoFragment.kt
+++ b/app/src/main/kotlin/cn/super12138/todo/views/todo/ToDoFragment.kt
@@ -53,9 +53,9 @@ class ToDoFragment : Fragment() {
         }*/
 
         val progressViewModel =
-            ViewModelProvider(requireActivity()).get(ProgressFragmentViewModel::class.java)
+            ViewModelProvider(requireActivity())[ProgressFragmentViewModel::class.java]
         val todoViewModel =
-            ViewModelProvider(requireActivity()).get(ToDoFragmentViewModel::class.java)
+            ViewModelProvider(requireActivity())[ToDoFragmentViewModel::class.java]
 
         val todoList = todoViewModel.todoList
 
@@ -89,7 +89,7 @@ class ToDoFragment : Fragment() {
                         ToDoDialogBinding.todoContent.error =
                             getString(R.string.content_cannot_be_empty)
                     } else {
-                        if (todoContent == "/DEV MODE") {
+                        if (todoContent == "/DEV_MODE") {
                             if (Repository.getPreferenceBoolean(
                                     ToDoApplication.context,
                                     "dev_mode",
diff --git a/app/src/main/res/drawable/ic_all_todos.xml b/app/src/main/res/drawable/ic_all_todos.xml
new file mode 100644
index 0000000..8c3bd45
--- /dev/null
+++ b/app/src/main/res/drawable/ic_all_todos.xml
@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:autoMirrored="true"
+    android:tint="?attr/colorControlNormal"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M4,10.5c-0.83,0 -1.5,0.67 -1.5,1.5s0.67,1.5 1.5,1.5 1.5,-0.67 1.5,-1.5 -0.67,-1.5 -1.5,-1.5zM4,4.5c-0.83,0 -1.5,0.67 -1.5,1.5S3.17,7.5 4,7.5 5.5,6.83 5.5,6 4.83,4.5 4,4.5zM4,16.5c-0.83,0 -1.5,0.68 -1.5,1.5s0.68,1.5 1.5,1.5 1.5,-0.68 1.5,-1.5 -0.67,-1.5 -1.5,-1.5zM7,19h14v-2L7,17v2zM7,13h14v-2L7,11v2zM7,5v2h14L21,5L7,5z" />
+</vector>
diff --git a/app/src/main/res/layout-land/activity_main.xml b/app/src/main/res/layout-land/activity_main.xml
index 37f4dc3..812e6e9 100644
--- a/app/src/main/res/layout-land/activity_main.xml
+++ b/app/src/main/res/layout-land/activity_main.xml
@@ -11,7 +11,7 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:fitsSystemWindows="true"
-        app:liftOnScrollTargetViewId="@id/progress_frag">
+        app:liftOnScroll="true">
 
         <com.google.android.material.appbar.MaterialToolbar
             android:id="@+id/toolbar"
diff --git a/app/src/main/res/layout/activity_about.xml b/app/src/main/res/layout/activity_about.xml
index f4a0367..efac606 100644
--- a/app/src/main/res/layout/activity_about.xml
+++ b/app/src/main/res/layout/activity_about.xml
@@ -10,7 +10,8 @@
     <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:fitsSystemWindows="true">
+        android:fitsSystemWindows="true"
+        app:liftOnScroll="true">
 
         <com.google.android.material.appbar.MaterialToolbar
             android:id="@+id/toolbar"
diff --git a/app/src/main/res/layout/activity_all_tasks.xml b/app/src/main/res/layout/activity_all_tasks.xml
new file mode 100644
index 0000000..f737ed7
--- /dev/null
+++ b/app/src/main/res/layout/activity_all_tasks.xml
@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout 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:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:fitsSystemWindows="true"
+    tools:context=".views.about.AboutActivity">
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:fitsSystemWindows="true"
+        app:liftOnScroll="true"
+        app:liftOnScrollTargetViewId="@+id/all_tasks_list">
+
+        <com.google.android.material.appbar.MaterialToolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            app:navigationIcon="@drawable/ic_arrow_back"
+            app:title="@string/all_tasks_label" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/all_tasks_list"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:fillViewport="true"
+        android:visibility="gone"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior">
+
+    </androidx.recyclerview.widget.RecyclerView>
+
+
+    <TextView
+        android:id="@+id/empty_tip"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="20dp"
+        android:gravity="center"
+        android:text="@string/no_tasks"
+        android:textSize="14sp"
+        android:visibility="visible" />
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_todo.xml b/app/src/main/res/layout/fragment_todo.xml
index e1c0038..ffd32d4 100644
--- a/app/src/main/res/layout/fragment_todo.xml
+++ b/app/src/main/res/layout/fragment_todo.xml
@@ -20,6 +20,7 @@
         android:layout_marginTop="20dp"
         android:gravity="center"
         android:text="@string/no_tasks"
+        android:textSize="14sp"
         android:visibility="visible" />
 
     <com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
diff --git a/app/src/main/res/layout/item_all_tasks.xml b/app/src/main/res/layout/item_all_tasks.xml
new file mode 100644
index 0000000..4376940
--- /dev/null
+++ b/app/src/main/res/layout/item_all_tasks.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<com.google.android.material.card.MaterialCardView xmlns:android="http://schemas.android.com/apk/res/android"
+    style="?attr/materialCardViewElevatedStyle"
+    android:layout_width="match_parent"
+    android:layout_height="80dp"
+    android:layout_marginLeft="10dp"
+    android:layout_marginTop="5dp"
+    android:layout_marginRight="10dp"
+    android:layout_marginBottom="5dp">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:orientation="vertical">
+
+        <TextView
+            android:id="@+id/todo_content_all"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="15dp"
+            android:layout_marginTop="18dp"
+            android:ellipsize="marquee"
+            android:singleLine="true"
+            android:textColor="?android:attr/textColorPrimary"
+            android:textSize="20sp" />
+
+        <TextView
+            android:id="@+id/todo_subject_all"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="15dp"
+            android:singleLine="true"
+            android:textColor="?android:attr/textColorPrimary"
+            android:textSize="11sp" />
+    </LinearLayout>
+</com.google.android.material.card.MaterialCardView>
\ No newline at end of file
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index e39852a..720f05d 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -61,4 +61,7 @@
     <string name="restore_need_restart_app">需要重启应用以应用恢复的数据</string>
     <string name="json_data_incorrect">JSON 数据格式错误</string>
     <string name="restore_failed">恢复失败，请检查是否重复恢复同一次备份的数据</string>
+    <string name="view_all_tasks_label">查看全部待办</string>
+    <string name="all_tasks_label">全部代办</string>
+    <string name="view_all_tasks_summary">查看包含已完成的待办在内的全部待办</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index ee485a6..a5f97e5 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -61,4 +61,7 @@
     <string name="restore_need_restart_app">Need to restart the app to apply the recovered data</string>
     <string name="json_data_incorrect">JSON data format is incorrect</string>
     <string name="restore_failed">Restore failed, please check if you are attempting to restore the same backup data again.</string>
+    <string name="view_all_tasks_label">View all tasks</string>
+    <string name="all_tasks_label">All tasks</string>
+    <string name="view_all_tasks_summary">View all tasks including those that have been checked as completed</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/xml/preferences.xml b/app/src/main/res/xml/preferences.xml
index 54e1246..a01bb97 100644
--- a/app/src/main/res/xml/preferences.xml
+++ b/app/src/main/res/xml/preferences.xml
@@ -2,12 +2,12 @@
     xmlns:app="http://schemas.android.com/apk/res-auto">
     <PreferenceCategory app:title="@string/appearance">
         <ListPreference
-            android:defaultValue="0"
-            android:entries="@array/appearance"
-            android:entryValues="@array/appearance_value"
-            android:icon="@drawable/ic_dark_mode"
-            android:key="dark_mode"
-            android:title="@string/dark_mode"
+            app:defaultValue="0"
+            app:entries="@array/appearance"
+            app:entryValues="@array/appearance_value"
+            app:icon="@drawable/ic_dark_mode"
+            app:key="dark_mode"
+            app:title="@string/dark_mode"
             app:summary="@string/dark_mode_summary" />
     </PreferenceCategory>
 
@@ -21,7 +21,7 @@
             app:dialogMessage="多个项目请使用英文逗号隔开"
             app:summary="自定义创建待办时文本框的预测项" />-->
         <SwitchPreferenceCompat
-            android:icon="@drawable/ic_screenshot"
+            app:icon="@drawable/ic_screenshot"
             app:defaultValue="false"
             app:key="secure_mode"
             app:summary="@string/secure_mode_summary"
@@ -32,15 +32,23 @@
             app:summary="@string/backup_summary"
             app:title="@string/backup" />
         <Preference
-            android:icon="@drawable/ic_restore"
+            app:icon="@drawable/ic_restore"
             app:key="restoreDB"
             app:summary="@string/restore_summary"
             app:title="@string/restore" />
     </PreferenceCategory>
 
-    <PreferenceCategory android:title="@string/others">
+    <PreferenceCategory app:title="@string/others">
         <Preference
-            android:icon="@drawable/ic_about"
+            app:icon="@drawable/ic_all_todos"
+            app:summary="@string/view_all_tasks_summary"
+            app:title="@string/view_all_tasks_label">
+            <intent
+                android:targetClass="cn.super12138.todo.views.all.AllTasksActivity"
+                android:targetPackage="cn.super12138.todo" />
+        </Preference>
+        <Preference
+            app:icon="@drawable/ic_about"
             app:title="@string/about_label">
             <intent
                 android:targetClass="cn.super12138.todo.views.about.AboutActivity"