安卓setTitle()不显示怎么办

1.在AndroidManifest.xml文件中找到 android:theme="@style/Theme.Tablayout"；

2.ctrl+右键点击@style/Theme.Tablayout，跳转到themes.xml；

3.将"Theme.Material3.DayNight.NoActionBar"替换为Theme.MaterialComponents.Light.Bridge即可显示title；

4.Theme.MaterialComponents.Light.Bridge 显示title；

5.Theme.Material3.DayNight.NoActionBar 不显示title；

AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.Tablayout"
        tools:targetApi="31">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

themes.xml
<resources xmlns:tools="http://schemas.android.com/tools">
    <!-- Base application theme. -->
    <style name="Base.Theme.Tablayout" parent="Theme.Material3.DayNight.NoActionBar">
        <!-- Customize your light theme here. -->
        <!-- <item name="colorPrimary">@color/my_light_primary</item> -->
    </style>

    <style name="Theme.Tablayout" parent="Base.Theme.Tablayout" />
</resources>