PDF file is corrupted

[r8HZGEmq]

I run my app(demo) on 4 devices and try to read the pdf file from sdCard and show it. The system versions of the four devices are 4.4.2(phone), 5.1(pad), 6.0(phone) and 6.0.1(pad) respectively. Except for 6.0.1 this pad device failed, prompt message:
Exception 'java / lang / RuntimeException', Message: 'PDF file is corrupted'; PdfDocument.nativeOpen (): return handle = 0xaf6a4188
At org.vudroid.pdfdroid.codec.PdfDocument.open (Native Method).
I tried to read the source code, but traced to the last into the native method.any help is grateful

[joshuayingwhat]

you need add read external storage permission