TL;DR

Clone from liblaf/Telegram and you are good to go. I have had release.keystore and google-services.json prepared.

Environment

Recommended Environment

Environment Setup

• ijkplayer: liblaf/ijkplayer: Android/iOS video player based on FFmpeg n3.4, with MediaCodec, VideoToolbox support.
• lib-monitor: liblaf/lib-monitor
• LLVM@9: llvm@9 — Homebrew Formulae
• NDK-r14b: android-ndk-r14b-linux-x86_64.zip
• NDK-r21e: android-ndk-r21e-linux-x86_64.zip
• Android Studio 2.3.3: android-studio-ide-162.4069837-linux.zip

How to Build ijkplayer

Before Build

1. Download NDK: Unsupported Downloads · android/ndk Wiki
2. Download Android Studio: Android Studio download archives | Android Developers