kitkat中的启动屏幕不工作，android中的api级别较低

我正在android应用程序中使用闪屏。它适用于棒棒糖和更高版本，但不适用于kitkat和更低版本。 问题在menifest.xml中，但我无法修复它

<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/AppTheme">
    <activity android:name=".SplashScreenActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar">
        <meta-data
            android:name="com.facebook.sdk.ApplicationId"
            android:value="@string/facebook_app_id" />

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

}

---

在res/anim/alpha.xml中

alpha.xml

<?xml version="1.0" encoding="utf-8"?>
<alpha
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromAlpha="0.0"
    android:toAlpha="1.0"
    android:duration="3000" />

---

这是我的飞溅屏幕。它适用于android 4.1及更高版本

SplashScreen.java

public class SplashScreen extends AppCompatActivity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.splashscreen_layout);

    }

    @Override
    protected void onStart() {

        super.onStart();


        // load your stuff here ...


        Intent intent = new Intent(SplashScreen.this, YourHomeActivity.class);
        startActivity(intent);
        finish();

    }
}

res/layout/splashscreen_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="false"
    tools:context=".SplashScreen"
    android:theme="@style/SplashTheme">

</android.support.design.widget.CoordinatorLayout>

6.0（api 23）：
显示代码、活动代码我认为menifest.xml文件中没有问题……您可以发布SplashScreenActivity java代码。同时共享您的java代码和xml。如所有建议，请在下面共享您的活动代码checkout java代码
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="false"
    tools:context=".SplashScreen"
    android:theme="@style/SplashTheme">

</android.support.design.widget.CoordinatorLayout>

<style name="SplashTheme" parent="Theme.AppCompat.NoActionBar">
    <item name="android:windowBackground">@drawable/splashscreen_drawable</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
</style>

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

    <item android:drawable="@color/colorPrimary"/>

    <item>
        <bitmap
            android:gravity="center"
            android:src="@drawable/your_icon" />
    </item>

</layer-list>

<application

        [...]

        >
        <activity
            android:name="com.your.package.app.SplashScreen"
            android:label="@string/app_name"
            android:theme="@style/SplashTheme">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        [...]