IOException: not create document. Error

When I prepare the example “Display PDF in assets folder (inside APK)“, I face with the error of “ not create document. Error”. It should be generated by the code:

pdfRenderer = new PdfRenderer(fileDescriptor);

Somebody commented it’s caused by new version of Gradle (ref:, so I edit dependencies of buildscript in build.gradle (Project: …), use gradle:2.1.2 to solve this problem.