Android face classics, you want to do it?

I am looking for a job recently. I will sort out the interview questions I have encountered.

Describe the launchMode in Android

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How to realize the floating button in a mobile game

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The principle of Retrofit

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The difference between ‘wait’ and ‘sleep

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What are annotations

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What control would you use to make a list, and how would you implement multiple layouts with that control

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Briefly describe the process of making jar libraries

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Memory leaks in Android

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What is UI stuck and how to solve it

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What design patterns are used in the work. For example

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The relationship between activities, Windows, and Views

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View drawing process

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View event distribution process

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Write a method for reordering and reordering data

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RxJava operator

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The difference between a memory leak and a memory overflow

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How is instant messaging implemented

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The difference between View and ViewGroup event listening

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View’s touch event flow

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Use ViewPager+Fragment? How to implement lazy loading? What are the real differences in Radiobutton+Fragment?

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ListView and RecyclerView how to implement caching, what is the principle?

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The singleton pattern

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Is the UI updated in the main thread or child thread

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RxJava thread scheduling

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Handler, Looper, and MessageQueue

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The animation of the Android

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What is ANR? What are the causes of ANR

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What are the ways in which services are registered and their life cycles

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Synchronization methods for threads

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Two modes of service

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Two ways of broadcasting

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The webView falls back to the last loaded URL

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How to implement countdown in ListView or RecyclerView

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The difference between processes and threads

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Object lock

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Ways to optimize performance (layout and memory)

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Ok, multithreading

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The paper IntentService

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The thread pool

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When is onPause called, when is onStop called, and why

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The difference between public, protected and private

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Anonymous inner class

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Event passing mechanism

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Which third party frameworks are used

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How is a thread-safe singleton implemented

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Has Okhttp been used? How do I submit GET and POST parameters

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Have you ever used AsyncTask? Briefly describes the

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In normal development, do you customize some views? Custom steps, why custom

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Know the MVP? Write a case by hand

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Implement a singleton. Why use a singleton

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Have you developed bluetooth, NFC type? Briefly describe the process

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Interprocess communication

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Do you know the two-process daemon? How do you do that, hand write a case

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Have you read the source code, read what, briefly describe the principle

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