Android编程中activity启动时出现白屏、黑屏问题的解决方法

<style name="AppTheme" parent="android:Theme.Light.NoTitleBar"> 
 <item name="android:windowIsTranslucent">true</item> 
 <item name="android:windowNoTitle">true</item> 
 <item name="android:windowActionBar">false</item> 
 <item name="android:windowBackground">@android:color/transparent</item> 
 <!-- All customizations that are NOT specific to a particular API-level can go here. --> 
</style> 

<application 
 android:name="com.skymobi.moposns.MyApplication" 
 android:allowBackup="true" 
 android:icon="@drawable/ic_launcher" 
 android:label="@string/app_name" 
 android:theme="@style/AppTheme" > 
<activity 
 android:name="com.skymobi.moposns.MainActivity" 
 android:label="@string/app_name" 
 android:screenOrientation="portrait" > 
 <intent-filter> 
  <action android:name="android.intent.action.MAIN" /> 
  <category android:name="android.intent.category.LAUNCHER" /> 
 </intent-filter> 
</activity>