PDF_Demo issues

请问这是什么问题: couldn't find "libmupdf.so"

1

找不到这个so库吗????直接下载跑起来的demo

``` java.lang.NullPointerException: Attempt to invoke interface method 'android.view.View android.widget.Adapter.getView(int, android.view.View, android.view.ViewGroup)' on a null object reference at com.artifex.mupdf.ReaderView.getOrCreateChild(ReaderView.java:498) at com.artifex.mupdf.ReaderView.onLayout(ReaderView.java:397) at android.view.View.layout(View.java:16987) at android.view.ViewGroup.layout(ViewGroup.java:5550) at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1080) at android.view.View.layout(View.java:16987) at android.view.ViewGroup.layout(ViewGroup.java:5550)...

LoveqLRC