Foxit PDF SDK for Android的AndroidManifest.xml中，Activity缺少configChanges配置。示例代码如下：

<activity  
    android:name=".MainActivity"  android:configChanges="keyboardHidden|orientation|screenSize|locale|layoutDirection|screenLayout|uiMode|smallestScreenSize"  
    android:exported="true"  
    android:launchMode="singleTop"  
    android:windowSoftInputMode="adjustPan">  
  
    <layout        android:gravity="center"  
        android:minWidth="520dp"  
        android:minHeight="700dp" />  
  
    <intent-filter>        <action android:name="android.intent.action.MAIN" />  
        <category android:name="android.intent.category.LAUNCHER" />  
    </intent-filter>    <intent-filter tools:ignore="AppLinkUrlError">  
        <action android:name="android.intent.action.VIEW" />  
        <category android:name="android.intent.category.DEFAULT" />  
        <data android:mimeType="application/pdf" />  
    </intent-filter>
    </activity>