TOPIC:

I have tried to integrate the library with samsung note 5 , the library cause a crash with the following log :

11-24 16:13:49.341 29139-30046/com.example.android A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0x0 in tid 30046 (AsyncTask #4)
11-24 16:13:49.401 3065-3065/? I/DEBUG: *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
11-24 16:13:49.401 3065-3065/? I/DEBUG: Build fingerprint: 'samsung/nobleltejv/noblelte:5.1.1/LMY47X/N920CXXU2AOJ5:user/release-keys'
11-24 16:13:49.401 3065-3065/? I/DEBUG: Revision: '9'
11-24 16:13:49.401 3065-3065/? I/DEBUG: ABI: 'arm64'
11-24 16:13:49.401 3065-3065/? I/DEBUG: pid: 29139, tid: 30046, name: AsyncTask #4 >>> com.example.android <<<
11-24 16:13:49.401 3065-3065/? I/DEBUG: signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0
11-24 16:13:49.421 3065-3065/? I/DEBUG: x0 0000007f9ba980f0 x1 0000000000000000 x2 0000000000000044 x3 0000000000000001
11-24 16:13:49.421 3065-3065/? I/DEBUG: x4 ffffffffffffffff x5 0000000000000000 x6 8000000000000080 x7 fefefefefefefefe
11-24 16:13:49.421 3065-3065/? I/DEBUG: x8 ffffffffffffffff x9 ff646d6872746dff x10 7f7f7f7f7f7f7f7f x11 0101010101010101
11-24 16:13:49.421 3065-3065/? I/DEBUG: x12 0000000000000000 x13 0000000000430000 x14 0000000000000000 x15 0000007fa2bfb000
11-24 16:13:49.421 3065-3065/? I/DEBUG: x16 0000007f89167c20 x17 0000007fa69e6ae4 x18 0000007fa2b45000 x19 00000000000000f0
11-24 16:13:49.421 3065-3065/? I/DEBUG: x20 0000000000000006 x21 0000000000000003 x22 0000000000000000 x23 0000000000000000
11-24 16:13:49.421 3065-3065/? I/DEBUG: x24 0000007f9b9d4740 x25 0000000000000000 x26 0000000000000001 x27 0000000012c67df0
11-24 16:13:49.421 3065-3065/? I/DEBUG: x28 0000000012d15c60 x29 0000000012da15d0 x30 0000007f89005768
11-24 16:13:49.421 3065-3065/? I/DEBUG: sp 0000007f8a6010f0 pc 0000007f88e82a78 pstate 0000000020000000
11-24 16:13:49.421 3065-3065/? I/DEBUG: #00 pc 0000000000065a78 /data/app/com.example.app.android-1/lib/arm64/librdpdf.so
11-24 16:13:49.421 3065-3065/? I/DEBUG: #01 pc 00000000001e8764 /data/app/com.example.app.android-1/lib/arm64/librdpdf.so
11-24 16:13:49.421 3065-3065/? I/DEBUG: #02 pc 00000000000bc97c /data/app/com.example.app.android-1/lib/arm64/librdpdf.so
11-24 16:13:49.421 3065-3065/? I/DEBUG: #03 pc 000000000004acc0 /data/app/com.example.app.android-1/lib/arm64/librdpdf.so (Java_com_radaee_pdf_Global_setDefaultFont+76)
11-24 16:13:49.421 3065-3065/? I/DEBUG: #04 pc 00000000001e0504 /data/dalvik-cache/arm64/data@app@com.example.app.android-1@base.apk@classes.dex

After further invesitgations , the library seems to fail to load default fonts from the system (roboto and droid sans) on this lines in global.java:

// set default font for fixed width font.
if (!setDefaultFont(null, "Roboto-Regular", true) && face_name != null)
{
if( !setDefaultFont(null, "DroidSans", true) )
setDefaultFont(null, face_name, true);
}
// set default font for non-fixed width font.
if (!setDefaultFont(null, "Roboto-Regular", false) && face_name != null)
{
if( !setDefaultFont(null, "DroidSans", false) )
setDefaultFont(null, face_name, false);
}

the fonts exists in the system.

In some cases we've found system fonts loaded from OEM in their devices with wrong or unexpected encoding.
Are you able to extract that files from device system?
You should try a software like play.google.com/store/apps/details?id=com.extract.fonts

To double check, while commenting that font loading, is the library instantiating properly?

Please, send files from your device within a support ticket and don't publish here.
We will delete such files as soon as your ticket will be closed.