继承Activity和 AppCompatActivity怎么分别去除标题栏和全屏

Activity全屏和去掉标题栏

在AndroidManifest.xml application属性增加

android:configChanges="orientation|keyboardHidden"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen"

AppCompatActivity全屏和去掉标题栏

AppCompatActivity设置一个Theme

<!--继承AppCompatActivity时，设置全屏-->
<style name="NoTitleFullscreen" parent="Theme.AppCompat.NoActionBar">
    <item name="android:windowNoTitle">true</item>
    <item name="windowActionBar">false</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:windowContentOverlay">@null</item>
</style>

接着：
<application
    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/NoTitleFullscreen">
    <activity android:name=".ui.activity.SplashActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

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