francistao/learningnotes

★ 13,153Audience · developerComplexity · 1/5Setup · easy

Mindmap

mindmap
  root((repo))
    Android Topics
      App startup flow
      Memory leaks
      Handler Looper
      MVP pattern
    Java Basics
      JVM class loading
      Garbage collection
      Collections framework
      Concurrency locks
    CS Fundamentals
      Data structures
      Sorting algorithms
      Computer networks
      Design patterns
    About
      Chinese language
      Interview prep
      No runnable code

mindmap root((repo)) Android Topics App startup flow Memory leaks Handler Looper MVP pattern Java Basics JVM class loading Garbage collection Collections framework Concurrency locks CS Fundamentals Data structures Sorting algorithms Computer networks Design patterns About Chinese language Interview prep No runnable code

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Things people build with this

USE CASE 1

Review Android internals like app startup, memory leaks, and the Handler messaging system before a technical interview.

USE CASE 2

Study Java concurrency topics including thread synchronization, locks, and thread-safe collections.

USE CASE 3

Read source-code walkthroughs of popular Android libraries to understand how they work under the hood.

USE CASE 4

Brush up on data structures and algorithms such as sorting, trees, graphs, and dynamic programming.

Tech stack

AndroidJava

Getting it running

Difficulty · easy Time to first run · 5min

Reading resource only, no code to install or run.

In plain English

LearningNotes is a collection of study notes written in Chinese, covering topics that an Android developer would need to know. The repository is organized as a long table of contents with links to individual articles stored as Markdown files inside the repo. The content is grouped into several areas. The first section covers Android development topics, including how Android apps start up, how memory leaks happen and how to fix them, how the internal messaging system (Handler and Looper) works, performance tuning, image caching strategies, and common architectural patterns like MVP. It also includes source-code walkthroughs of popular Android libraries. The second section focuses on Java fundamentals: core language knowledge, memory management, the Java collections framework (ArrayList, HashMap, and similar structures), and how the Java Virtual Machine handles class loading and garbage collection. There is also a section on concurrent programming, covering thread management, synchronization, locking, and thread-safe collections. Further sections cover data structures and algorithms (sorting, trees, graphs, dynamic programming), computer networks (HTTP, TCP/IP, socket programming), operating system basics, and design patterns such as Singleton, Builder, Observer, and Proxy. This repository appears to be one person's personal study notes, likely compiled while preparing for technical interviews in the Android development field. All text is in Chinese. There is no runnable code or library to install. It is a reading resource rather than a tool.

Copy-paste prompts

Prompt 1

Explain how Android's Handler and Looper work together to pass messages between threads, with a simple code example.

Prompt 2

Walk me through how Java's garbage collector decides which objects to remove from memory.

Prompt 3

Describe the MVP architecture pattern for Android and show me a minimal working example.

Prompt 4

What is the difference between HashMap and ArrayList in Java, and when should I use each one?

Prompt 5

Explain how Java class loading works in the JVM, step by step.

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