Android Telegram App –> java.lang.UnsatisfiedLinkError: No implementation found for void

The main problem is that you’re running the project without generating the native library from the C/C++ codes. Because of that project based on Telegram, which you point it out with the link, has the file Android.mk on the jni directory , you have to compile the code manually. I fixed that exception following these steps:

• Check that build.gradle contains:

source version 3.13.1 and newer:

sourceSets.main.jniLibs.srcDirs = ['./jni/']

source version lower than 3.13.1:

    sourceSets.main {
       jniLibs.srcDirs="libs"
       jni.srcDirs = [] //disable automatic ndk-build call
    }

• Download the NDK

Proceed according to your operating system.

Linux / Mac

$ cd <path-to-Telegram>/TMessagesProj
$ <path-to-ndk>/ndk-build

Windows

• Download Cygwin

• Add on .bashrc file, which is placed on Cygwin root directory (use some utility to find that file). In my case, the file was placed in C:\cygwin64\home\myuser.

  export ndkbuild=/cygdrive/partition_name/your_ndk_directory/ndk-build.cmd
  

• Open the Cygwin terminal and move yourself towards the jni directory of the project:

  cd /cygdrive/your_partition_name/project_jni_directory_path
  

• Write $ndkbuild and wait the compiler finishes its task. If this process is right, two directories will show up, obj and libs. Check that libs directory contains some library with .so extension. Finally, run the project.