explaingit

drklo/telegram

★ 29,184JavaAudience · developerComplexity · 4/5MaintainedLicenseSetup · hard

TLDR

Official Android source code for Telegram messaging app. Build your own Telegram-compatible client by compiling this Java codebase with your own API credentials.

Mindmap

mindmap
  root((repo))
    What it does
      Android messaging app
      Telegram protocol client
      Security focused
    Tech stack
      Java
      Android Studio
      Firebase
    Use cases
      Build custom messaging client
      Study large scale app
      Telegram compatible apps
    Getting started
      Register app ID
      Configure signing keys
      Add API credentials
    Constraints
      Cannot use Telegram name
      Must publish modifications
      Follow security guidelines

Things people build with this

USE CASE 1

Build a custom Android messaging client that connects to the Telegram network using your own app credentials.

USE CASE 2

Study how a production-scale, security-focused messaging application is architected in Java.

USE CASE 3

Create a Telegram-compatible app with custom features or UI while using the official protocol.

Tech stack

JavaAndroidAndroid StudioFirebase

Getting it running

Difficulty · hard Time to first run · 1day+

Requires Android Studio setup, API credentials from Telegram, Firebase configuration, and compilation of large Java codebase with multiple dependencies.

Use it freely, but any project you distribute that includes this code must also be GPL-licensed and open source.

In plain English

This repository contains the official source code for the Telegram messaging app on Android. Telegram is a messaging application focused on speed and security. The code is published so that developers can inspect it, build their own Telegram-compatible apps on top of it, or contribute to its development. The practical use is for developers who want to create their own Android messaging application that connects to the Telegram network. To do this, you register your own application ID with Telegram's developer program, then compile this code using Android Studio. The README walks through the exact steps: downloading the source, configuring signing keys, setting up Firebase for push notifications, and filling in the required API credentials before building. Importantly, if you create an app from this code, Telegram asks that you not call it "Telegram" or use the official logo, that you follow their security guidelines, and that you publish your own modified source code in turn. You would use this if you are a developer wanting to build a custom Android messaging client that uses the Telegram protocol, or if you want to study how a large-scale, security-focused messaging app is structured in Java.

Copy-paste prompts

Prompt 1
Walk me through the steps to compile this Telegram Android source code and build my own messaging app with custom API credentials.
Prompt 2
What are the key security components I should understand in this Telegram Android codebase before modifying it?
Prompt 3
Show me how to set up Firebase push notifications and signing keys for building a custom Telegram client from this source.
Prompt 4
What modifications can I make to this Telegram Android code, and what are the licensing restrictions I need to follow?
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Generated 2026-05-18 · Model: sonnet-4-6 · Verify against the repo before relying on details.