Use ToolBar

app/src/main/AndroidManifest.xml

@@ -7,13 +7,13 @@
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 
     <application
-
+        android:name=".MyApplication"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/Theme.Material3.DynamicColors.DayNight">
+        android:theme="@style/Theme.Material3.DayNight.NoActionBar">
         <activity
             android:name=".activity.favtag.FavTagActivity"
             android:exported="false" />

app/src/main/java/com/lsp/view/MyApplication.java

@@ -0,0 +1,13 @@
+package com.lsp.view;
+
+import android.app.Application;
+
+import com.google.android.material.color.DynamicColors;
+
+public class MyApplication extends Application {
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        DynamicColors.applyToActivitiesIfAvailable(this);
+    }
+}

app/src/main/java/com/lsp/view/activity/main/MainActivity.kt

@@ -68,6 +68,9 @@ class MainActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
         adapter = PostAdapter(this, ArrayList<Post>())
+        val toolbar = findViewById<Toolbar>(R.id.toolbar)
+        setSupportActionBar(toolbar)
+
 
         //到达底部，加载更多数据
         adapter.setLoadMoreListener(object : PostAdapter.OnLoadMoreListener {

app/src/main/res/layout/activity_main.xml

@@ -18,6 +18,21 @@
 
         android:layout_width="match_parent"
         android:layout_height="match_parent">
+
+        <com.google.android.material.appbar.AppBarLayout
+            android:id="@+id/appbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize">
+
+            <androidx.appcompat.widget.Toolbar
+                app:layout_scrollFlags="scroll|enterAlways|snap"
+                android:layout_width="match_parent"
+                android:layout_height="?attr/actionBarSize"
+                android:id="@+id/toolbar"
+                />
+
+        </com.google.android.material.appbar.AppBarLayout>
+
         <com.google.android.material.floatingactionbutton.FloatingActionButton
             android:id="@+id/fbtn"
             android:layout_width="wrap_content"