NullPointerException Appears in Android Application Using Aspose.Slides for Java

Aspose.Slides Product Family
,
1

Question:
Use aspose-slides to save pptx file to images, it work well at normal App, but when I set android:sharedUserId="android.uid.system" to Declare App as a system App, the problem appear.
Code 1:

<manifest
     ...
    android:sharedUserId="android.uid.system"
    ...>

Code 2:

val assetManager: AssetManager = context.getAssets()
val inputStream = assetManager.open("office/03MathSubject.pptx")
val presentation = Presentation(inputStream)
callback?.onParseStart()
totalCount = presentation.slides.size()
for (slideIndex in 0..totalCount) {
    val bitmap = presentation.slides.get_Item(slideIndex).getThumbnail(1f, 1f)
    callback ?.onParseProgress(slideIndex, totalCount, bitmap)

Product: com.aspose:aspose-slides:23.7:android.via.java

Trace:

Caused by: java.lang.NullPointerException: Attempt to read from field ‘com.aspose.slides.ms.backend.System.Drawing.a0 com.aspose.slides.ms.backend.System.Drawing.GraphicsEnv.dx’ on a null object reference
at com.aspose.slides.ms.backend.System.Drawing.GraphicsEnv.a0(Unknown Source:4)
at com.aspose.slides.ms.backend.System.Drawing.a0.qa(Unknown Source:0)
at com.aspose.slides.internal.g1.km.(Unknown Source:3)
at com.aspose.slides.internal.g1.km.(Unknown Source:12)
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:453)
at java.lang.Class.forName(Class.java:378)
at com.aspose.slides.internal.zk.dx.dp(Unknown Source:183)
at com.aspose.slides.ms.System.a0.md(Unknown Source:24)
at com.aspose.slides.ms.System.a0.qa(Unknown Source:96)
at com.aspose.slides.ms.System.a0.qa(Unknown Source:22)
at com.aspose.slides.ms.System.a0.qa(Unknown Source:6)
at com.aspose.slides.jyr.(Unknown Source:7)
at com.aspose.slides.GroupShape.(Unknown Source:50)
at com.aspose.slides.BaseSlide.(Unknown Source:63)
at com.aspose.slides.MasterSlide.(Unknown Source:0)
at com.aspose.slides.MasterSlideCollection.qa(Unknown Source:2)
at com.aspose.slides.zyn.qa(Unknown Source:139)
at com.aspose.slides.hb4.md(Unknown Source:11)
at com.aspose.slides.hb4.qa(Unknown Source:76)
at com.aspose.slides.Presentation.dp(Unknown Source:57)
at com.aspose.slides.Presentation.qa(Unknown Source:69)
at com.aspose.slides.Presentation.(Unknown Source:15)
at com.aspose.slides.Presentation.(Unknown Source:5)
at com.aspose.slides.Presentation.(Unknown Source:4)

2

@zhjkenneth,
Thank you for contacting support.

Please share the following files and information:

  • the simplest complete project that reproduces the exception
  • the “03MathSubject.pptx” file you used
  • OS version on which the error appears