Source link: https://github.com/google/j2objc

J2ObjC: Java to Objective-C Translator and Runtime

Project site: http://j2objc.org
J2ObjC blog: http://j2objc.blogspot.com
Questions and discussion: http://groups.google.com/group/j2objc-discuss

What J2ObjC Is

J2ObjC is an open-source command-line tool from Google that translates Java source code to Objective-C for the iOS (iPhone/iPad) platform. This tool enables Java source to be part of an iOS application's build, as no editing of the generated files is necessary. The goal is to write an app's non-UI code (such as application logic and data models) in Java, which is then shared by web apps (using GWT), Android apps, and iOS apps.

J2ObjC supports most Java language and runtime features required by client-side application developers, including exceptions, inner and anonymous classes, generic types, threads and reflection. JUnit test translation and execution is also supported.

J2ObjC is currently beta quality. Several Google projects rely on it, but when new projects first start working with it, they usually find new bugs to be fixed. If you run into issues with your project, please report them!

What J2ObjC isn't

J2ObjC does not provide any sort of platform-independent UI toolkit, nor are there any plans to do so in the future. We believe that iOS UI code needs to be written in Objective-C, Objective-C++ or Swift using Apple's iOS SDK (Android UIs using Android's API, web app UIs using GWT, etc.).

J2ObjC cannot convert Android binary applications. Developers must have source code for their Android app, which they either own or are licensed to use.

Requirements

JDK 1.8 or higher
Mac workstation or laptop
OS X 10.11 or higher
Xcode 7 or higher

License

This library is distributed under the Apache 2.0 license found in the LICENSE file with the following exceptions. The protocol buffers library is distributed under the same BSD license as Google's protocol buffers. See README and LICENSE.

Source link: https://github.com/google/j2objc

Resources

SuperRecyclerView

Features built in:

ProgressBar while adapter hasn't been set
EmptyView if adapter is empty
SwipeRefreshLayout (Google's one)
Infinite scrolling, when you reach the X last item, load more of them
Swipe To Dismiss
Sticky headers

Recycler Views

Android Tooltip

android-target-tooltip allows to create toasts like tooltips, but targets can be specified, plus custom properties and features.

Tooltips

TextViewWithLinks

TextViewWithLinks is a TextView With Link handler

Text Views

android-proguard-snippets

Example Proguard configurations for common Android libraries.

This project assumes that your ProGuard configuration is based off of the latest official proguard-android.txt config as shown below. Each library configuration should only be the rules required for that specific library, not a complete Android ProGuard configuration. The various library configurations are combined by the Gradle build system. The library rules should be universal, any app specific rules (such as preserving model classes) should be added in a custom proguard-project.pro file.

ProGuard

Sprockets

Extend base components, use widgets, and call utility methods.

Utils

Apktool

It is a tool for reverse engineering 3rd party, closed, binary Android apps. It can decode resources to nearly original form and rebuild them after making some modifications; it makes possible to debug smali code step by step. Also it makes working with app easier because of project-like files structure and automation of some repetitive tasks like building apk, etc.

Tools

Q & A

Restoring apps from TWRP

LOTS of red pixels Meizu M2

S-pen SDK Compatibility

Issues in rooting Galaxy Note2 GT N7100

Nougat downloaded but now not in notifications