AndroidAPP应用启动页白屏(StartingWindow)优化

<resources>

    
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        
        <item name="colorPrimary">@color/colorPrimaryitem>
        <item name="colorPrimaryDark">@color/colorPrimaryDarkitem>
        <item name="colorAccent">@color/colorAccentitem>
    style>

    
    <style name="AppTheme.StartingWindowTheme" parent="AppTheme">
        
        
         
        <item name="android:windowBackground">@drawable/startingwindow_bgitem>
    style>

resources>

xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#3F51B5color>
    <color name="colorPrimaryDark">#303F9Fcolor>
    <color name="colorAccent">#FF4081color>

    
    <color name="startingwindow_bgcolor">#00bfffcolor>
resources>

xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.why.project.androidstartingwindowdemo">

    <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=".MainActivity" android:theme="@style/AppTheme.StartingWindowTheme">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>

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

manifest>

package com.why.project.androidstartingwindowdemo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setTheme(R.style.AppTheme);//恢复原有的样式
        setContentView(R.layout.activity_main);
    }
}