What do Android Studio modules produce? - android-studio

What do Android Studio modules produce? e.g. a jar per module, an apk per module?
How do dependencies between modules affect these?
Or is it solely an IDE fiction?

Well if you are getting started I would advice you check out this page:
https://developer.android.com/tools/projects/index.html It contains what you seek.
"There are only a handful of files and folders generated for you, and some of them depend on whether you use Android Studio or the android tool to generate your module. As your application grows in complexity, you might require new kinds of resources, directories, and files."
-As in the the dev.android link I just posted above

Related

Importing LIBGDX library gdx-backend-android.jar into Android Studio Project

After a hiatus of a couple of years I'm picking up Android development again.
I installed the newest Android Studio(4.1.1) with the latest Android SDK version (Android 11, API 30). After that I created a new project with gdx-setup.
If I add the old java source to my newly generated project I get this error:
error: package com.badlogic.gdx.backends.android does not exist
I'm not sure how to add this jar into the new project. In the Gradle configuration I see mentions of the backend, but it's not available.
I also downloaded the 'gdx-backend-android.jar' from the nightly build and put the jar in the Android library folder, all to no avail.
Does anyone actually know how to correctly add this dependency into my project?
I added the jar but still have an error, don't mind the other errors, I first need to fix the GDX import.
The project dependencies are managed by Gradle, so there is no need for you to directly touch any .jar files at all.
The most likely issue you're facing is that you are trying to use Android-specific classes from the core module, which is platform agnostic.
In a typical libGDX project, you do almost all your game code in the core module so it can easily be compiled for any platform. The code you showed above would be in the android module, but your LiveWallpaperStarter class would be part of core.
Some might say there's no reason to use core at all if you're making a Live Wallpaper, since it can't run on any other platforms besides Android. But there is some advantage in keeping the rendering in core so you can test in a desktop game window, because you can more rapidly compile and run on the desktop. This library has some tools that make it easy to wrap your rendering code in a class that lets you simulate a live wallpaper on desktop, for testing.

Why duplicate folders in an Android project?

I've found out that over a course of several years, a lot of programs keep seemingly duplicate "project folders" in the Android Studio, why is that?
To elaborate a bit further, if you import their projects, and if you take a look at there folder structure, there is going to be something like this:
Java
|--com.myproject.spaceInvader
|--com.myproject.spaceInvader(test)
|--com.myproject.spaceInvader(alphaTest)
What are these? Something generated by 3rd party testing tools?
When you create a project in Android Studio, it has a standard structure:
From official documentation:
main
Contains the "main" sourceset files: the Android code and
resources shared by all build variants (files for other build variants
reside in sibling directories, such as src/debug/ for the debug build
type). AndroidManifest.xml Describes the nature of the application and
each of its components. For more information, see the
AndroidManifest.xml documentation. java/ Contains Java code sources.
test
Contains code for local tests that run on your host JVM.
androidTest
Contains code for instrumentation tests that run on an
Android device. For more information, see the Android Test
documentation.

Opened project in android studio and all packages/symbols are marked as incorrect

I am trying to contribute to my first open source project but after forking and cloning from the repo, all files are marked as an error.
Sample error
This is after selecting a source folder.
Current project source
Under package it says: package name does not correspond to filepath
... but I have this
misnamed packages?
Android studio isn't picking up those libraries.
IME there are 2 ways of importing these (I have only had success with the first):
1) copy the source parallel to your own (ie example.com)
2a) include the jar in a libs folder and tell AS to look out for it. (right click will typically provide a good option that I can't recall)
2b) because Android can struggle (ie I couldn't do it, though inroads may have been made since) with importing jars, you may need to use AAR's (android library packages, Android Archive Library (aar) vs standard jar)
However, because this is an open source project, this should all be handled auto-magically for you via the gradle scripts included in the distro.

Converting android ndk build files to gradle

Is there any documentation on converting a application.mk/android.mk file to a gradle based build.gradle file?
good links, QArea. Thanks a lot!
At this moment NDK support in Gradle are very limited. If you need to assemble something that gradle not provides that function
I do like this.
I collect the old-fashioned, but to .so-patches automatically picks up the Gradle-plugin:
ndk-build -j4 NDK_LIBS_OUT=src/main/jniLibs
Otherwise, you must wait for next version of gradle 0.13. Devs promise that NDK will fix integration with NDK.
I made a script tool to convert android.mk building system to gradle building system, because I wanted to test the demo source codes in:
https://android.googlesource.com/platform/development/+/05523fb0b48280a5364908b00768ec71edb847a2/samples
But after searching whole internet, I found no one did it yet. So I created this tool by myself. But even with this tool, we couldn't ensure all projects in AndroidSamples could be built and executed successfully because of the API versions and features mismatch. So I created my own projects for https://android.googlesource.com/platform/development/+/05523fb0b48280a5364908b00768ec71edb847a2/samples
And I want to convert those demo projects one by one.
Now the whole source codes are here:
https://github.com/clockzhong/AndroidSamples
I already successfully converted some samples into gradle building system and executed them correctly on my android phones. But I still have some version mismatch issues, anyway, I'll mentioned it in the project check-in comments.

Android Studio - How to open multiple project in single window?

I have downloaded Android Studio and started using it for my Android development.
I need to know, how to open multiple number of projects in a single window like Eclipse. Expecting some help, thanks.
IntelliJ IDEA creates a project for the entire code base you work with, and a module for each of its individual components. So, IntelliJ IDEA module is more like an Eclipse project, and project is roughly similar to Eclipse workspace. There's no exact equivalent to Eclipse's workspace that contains all your work, but you can open multiple projects in multiple frames at the same time.
This table can help you see how Eclipse and IntelliJ IDEA concepts map to each other:
Eclipse IDEA
Workspace Project
Project Module
Project-specific JRE Module JDK
User library Global library
Classpath variable Path variable
Project dependency Module dependency
Library Module library
To use the library add it as a dependancy:
File > Project Structure > Modules > Dependencies
Then add the module (android library) as a module dependency.
Open two projects in a single window is not possible in Android Studio / IntelliJ IDEA. So, when you open a second project, you'll have to decide:
New projects can either be opened in a new window or replace the project in the existing window.
How would you like to open the project?
This limitation is useful because your window offers project specific features, like the Changes tab for VCS information, etc.
How to use library projects?
For now, you can copy the library project into your project folder and declare it as a module dependency. If you use the same libraries in different projects, you will end up having the code multiple times.
ProjectA ProjectB
facebook-sdk/ actionbarsherlock/
actionbarsherlock/ bin/
bin/ src/
src/ ...
AndroidManifest.xml
While this feels kind of inconvenient, it helps having all the required sources in VCS. Soon, Gradle, the new build system, will manage these dependencies pleasantly. Here's an example of how the Gradle build could look like to include ActionBarSherlock or similar libs:
repositories {
mavenCentral()
}
dependencies {
compile 'com.actionbarsherlock:library:4.2.0'
}
In this answer you'll find some reasons why this solution does not work yet.
write code in settings.gradle
include ':ProjectName'
project(':ProjectName').projectDir = new File(rootDir, '/ProjectName')

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