首先在drawable資料夾建立shape_launch

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
    android:opacity="opaque">
    <item >
        <bitmap
            android:src="@drawable/splash" />
    </item>

</layer-list>

<style name="LaunchStyle" parent="AppTheme">
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowFullscreen">true</item>
        <item name="android:windowBackground">@drawable/shape_launch</item>
    </style>

<activity
            android:name=".activity.SplashActivity"
            android:theme="@style/LaunchStyle"