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Build "Sources for Android 29" so you can comfortably browse the Android API source in Android Studio.

  1. Collect source files
mkdir android-sdk-source-build
cd android-sdk-source-build

mkdir -p frameworks/base
@elizarov
elizarov / DeepRecursiveFunction.kt
Last active March 25, 2024 00:40
Defines recursive function that keeps its stack on the heap (productized version)
import kotlin.coroutines.*
import kotlin.coroutines.intrinsics.*
/**
* Defines deep recursive function that keeps its stack on the heap,
* which allows very deep recursive computations that do not use the actual call stack.
* To initiate a call to this deep recursive function use its [invoke] function.
* As a rule of thumb, it should be used if recursion goes deeper than a thousand calls.
*
* The [DeepRecursiveFunction] takes one parameter of type [T] and returns a result of type [R].
@objcode
objcode / ConcurrencyHelpers.kt
Last active August 20, 2025 06:45
Helpers to control concurrency for one shot requests using Kotlin coroutines.
/* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
@elizarov
elizarov / AD.kt
Last active September 5, 2024 00:32
Automatic Differentiation with Kotlin
/*
* Implementation of backward-mode automatic differentiation.
*/
/**
* Differentiable variable with value and derivative of differentiation ([grad]) result
* with respect to this variable.
*/
data class D(var x: Double, var d: Double = 0.0) {
constructor(x: Int): this(x.toDouble())
@Ribesg
Ribesg / !README.md
Last active June 20, 2022 15:00
How to use an iOS Framework in a Kotlin MPP library published to Maven

This gist demonstrates how to build a Kotlin MPP library so that the iOS sourceSet depends on and uses an iOS Framework as a dependency.

Key ideas:

  • We use [Carthage] to retrieve/build the iOS Framework.
  • We use [cinterop] to create bindings allowing us to use the iOS Framework from Kotlin
  • We build and publish the library using ./gradlew publishToMavenLocal
  • We build and publish [klib] artifacts for both the arm64 and x86_64 architectures, you can easily add arm32 if you need.
  • Note that the publish process also publishes a cinterop klib artifact, allowing dependents to also know about the iOS Framework headers.

You can find a gist explaining how to use such library in an iOS app [here][ios-app].

@benasher44
benasher44 / ios.gradle
Last active April 30, 2019 04:23
iOS Gradle Utilities for Generating Fat Frameworks and dSYMs
afterEvaluate {
// Create tasks for creating fat frameworks and fat dsyms for sim and device
def binaryKinds = [
// config, sim task, device task
new Tuple('Debug', linkDebugFrameworkIosSim, linkDebugFrameworkIosDevice),
new Tuple('Release', linkReleaseFrameworkIosSim, linkReleaseFrameworkIosDevice),
]
import Foundation
extension Collection where Element: Comparable {
func sorted(ascending: Bool = true, using comparator: (Element) -> (Element) -> ComparisonResult) -> [Element] {
return self.sorted { lhs, rhs in
comparator(lhs)(rhs) == (ascending ? .orderedAscending : .orderedDescending)
}
}
}
/*
* Copyright (C) 2018 Square, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
@dlew
dlew / script.sh
Created November 9, 2018 16:36
Simple AndroidX Migration Script
#!/usr/bin/env bash
# I've found that the "Migrate to AndroidX" converter in Android Studio doesn't work very
# well, so I wrote my own script to do the simple job of converting package names.
#
# You can download a CSV of package names here: https://developer.android.com/topic/libraries/support-library/downloads/androidx-class-mapping.csv
#
# It'll run faster on a clean build because then there are fewer files to scan over.
#
# Uses `gsed` because I'm on a Mac. Can easily replace with `sed` if you don't have `gsed`.
@nickbutcher
nickbutcher / LICENSE
Last active October 6, 2020 11:14
Fun with gradients and AnimatedVectorDrawables. Illustration by the wonderful https://twitter.com/VPoltrack
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.