Android 启动uni 小程序sdk过渡动画是一闪而过的黑色太影响体验了

Android 启动uni 小程序sdk过渡动画是一闪而过的黑色太影响体验了，试了
主题等还是黑色

<activity  
            android:name=".component.splash.SplashActivity"  
            android:theme="@style/UniAppLaunchTheme"  
            android:exported="true"  
            android:screenOrientation="portrait">  
            <intent-filter>  
                <action android:name="android.intent.action.MAIN" />  

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

 <style name="UniAppLaunchTheme" parent="Theme.AppCompat.Light.NoActionBar">  
        <item name="android:windowBackground">@color/page_color</item>  
        <item name="android:windowAnimationStyle">@style/CustomWindowAnimation</item>  
    </style>  

    <style name="CustomWindowAnimation" parent="android:style/Animation.Activity">  
        <item name="android:activityOpenEnterAnimation">@anim/dcloud_page_open_enter</item>  
        <item name="android:activityOpenExitAnimation">@anim/dcloud_page_open_exit</item>  
        <item name="android:activityCloseEnterAnimation">@anim/dcloud_page_close_enter</item>  
        <item name="android:activityCloseExitAnimation">@anim/dcloud_page_close_exit</item>  
    </style>