解决android 应用首次启动的时候，闪现短暂的白屏或黑屏等

解决方案：

...
<activity
android:name=".SplashActivity"
android:theme="@android:style/Theme.Translucent.NoTitleBar">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>

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

<!-- Variant of {@link #Theme_Translucent} with no title bar -->
<style name="Theme.Translucent.NoTitleBar">
<item name="windowNoTitle">true</item>
<item name="windowContentOverlay">@null</item>
</style>