I am using android studio 4.0.1, I have a ndk module called app, that has a fold structure like below image shows. Now I added a task to the highlighted build.gradle file, where I put:
task conanInstall {
def buildDir = new File("src/main/cpp/native_lib.build")
buildDir.mkdirs()
...
}
As you see, the build.gradle file is in the app folder, so I specified the path to be src/main/cpp/native_lib.build which is relative to the gradle file, however, this failed and I need to use app/src/main/cpp/native_lib.build to make it work. Why is that?
In the same gradle file I saw in the android section:
externalNativeBuild {
cmake {
path "src/main/cpp/CMakeLists.txt"
version "3.17.0"
}
}
The path there starts with src rather than app. This confuses me on how the gradle file deals with relative path.
java.io.File resolves relative path against the current user directory. This is what the doc says:
By default the classes in the java.io package always resolve relative pathnames against the current user directory. This directory is named by the system property user.dir, and is typically the directory in which the Java virtual machine was invoked.
To resolve a path relative to current project you can use file(...):
task conanInstall {
def buildDir = file("src/main/cpp/native_lib.build")
buildDir.mkdirs()
...
}
where file() is org.gradle.api.Project#file(java.lang.Object), and (according to javadoc) it does exactly what you need:
Resolves a file path relative to the project directory of this project.
I was using ANT before (Android Project) and i had "static" files in the same packages as my code
Here is an example
src/com/my/app/test/Parser.java
src/com/my/app/test/json_to_parse.json
When executing the unit tests, the json file was copied into the gen folder, therfor it was possible to access the json in the test with
getClass().getResourceAsStream(fileName)
I had to convert the project to gradle, but now the tests are failing.
After checking the "build" folder, i've realised, the .json files are not there, therefor the getResourceAsStream method returns null.
Any idea how to include these "static" files (json, xml, ...) into the build folder?
Moving the files into the resources folder did not work out of the box in Android Studio (even though is should have)
This should be fixed in Android Studio 1.2.
However, this is what i did:
Moved all static files into the resources folder.
In my unit-test module i've added this to the build.gradle file
task copyTestResources(type: Copy) {
from "${projectDir}/src/test/resources"
into "${buildDir}/classes/test"
}
processTestResources.dependsOn copyTestResources
Now, all files located inside src/test/resources will be copied into /classes/test where i can access them with
getClass().getResourceAsStream(fileName)
If i keep the package structure inside the resources folder the same as it was in the java folder, i don't need to adjust any code.
To complete the story a bit more:
JUnit4 runner requires
getClass().getResourceAsStream(name)
while Robolectric requires
getClass().getClassLoader().getResourceAsStream(name)
The files you are asking about are called "resource files" in Maven/Gradle lingo.
Gradle assumes that you are using the Maven Standard Directory Layout.
So, either you move your files into src/test/resources (then Gradle will pick them up automatically), or you tell Gradle that it should look for resources in some other place.
In the latter case, you need to modify the processTestResources task. However, keeping resource files in the same directory as source code is a bad practice. So I advise the former option.
if your problem is happen when you create apk with AndroidStudio.
you can create a jar file that includes your resources with jar.exe
for example i put a.txt into resources directory
and run this code in cmd:
"C:\Program Files\Java\jdk1.7.0_79\bin\jar" cvfe res.jar -c resources
after that a jar file "res.jar" was created
then add that res.jar into libs folder in your project
when your apk is creating resources are added to your final apk and you can use this code to acsess a.txt:
someclass.class.getClassLoader().getResourceAsStream("resources/a.txt");
with this job no need to change Gradle setting.
How do I create an Android Library Project (e.g. com.myapp.lib1) and the application project (e.g. com.myapp.app) and make the build system include com.myapp.lib1 on the application project?
I went to the Project Structure -> Modules -> My App project and added a dependency to the lib project. IntelliJ now can recognize classes from the lib project when used in the app project, but when I run the app project, there are errors like:
Gradle: error: package com.myapp.lib1 does not exist
I wonder why there is no example of stand alone jar project.
In eclipse, we just check "Is Library" box in project setting dialog.
In Android studio, I followed this steps and got a jar file.
Create a project.
open file in the left project menu.(app/build.gradle): Gradle Scripts > build.gradle(Module: XXX)
change one line: apply plugin: 'com.android.application' -> 'apply plugin: com.android.library'
remove applicationId in the file: applicationId "com.mycompany.testproject"
build project: Build > Rebuild Project
then you can get aar file: app > build > outputs > aar folder
change aar file extension name into zip
unzip, and you can see classes.jar in the folder.
rename and use it!
Anyway, I don't know why google makes jar creation so troublesome in android studio.
To create a library:
File > New Module
select Android 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.
Run your project. It will work.
Google’s Gradle Plugin recommended way for configuring your gradle files to build multiple projects has some shortcomings If you have multiple projects depending upon one library project, this post briefly explain Google’s recommended configuration, its shortcomings, and recommend a different way to configure your gradle files to support multi-project setups in Android Studio:
An alternative multiproject setup for android studio
A Different Way :
It turns out there’s a better way to manage multiple projects in Android Studio. The trick is to create separate Android Studio projects for your libraries and to tell gradle that the module for the library that your app depends on is located in the library’s project directory. If you wanted to use this method with the project structure I’ve described above, you would do the following:
Create an Android Studio project for the StickyListHeaders library
Create an Android Studio project for App2
Create an Android Studio project for App1
Configure App1 and App2 to build the modules in the StickyListHeaders project.
The 4th step is the hard part, so that’s the only step that I’ll describe in detail. You can reference modules that are external to your project’s directory by adding a project statement in your settings.gradle file and by setting the projectDir property on the ProjectDescriptor object that’s returned by that project statement:
The code one has to put in settings.gradle:
include ':library1'
project(':library1').projectDir = new File('../StickyListHeader/library1')
If you’ve done this correctly, you’ll notice that the modules referenced by your project will show up in the project navigator, even if those modules are external to the project directory:
This allows you to work on library code and app code simultaneously. Version control integration also works just fine when you reference modules externally this way. You can commit and push your modifications to the library code just like you can commit and push modifications to your app code.
This way of setting up multiple projects avoids the difficulties that plague Google’s recommended configuration. Because we are referencing a module that is outside of the project directory we don’t have to make extra copies of the library module for every app that depends on it and we can version our libraries without any sort of git submodule nonsense.
Unfortunately, this other way of setting up multiple projects is very difficult to find. Obviously, its not something you’ll figure out from looking at Google’s guide, and at this point, there’s no way to configure your projects in this way by using the UI of Android Studio.
Check out this link about multi project setups.
Some things to point out, make sure you have your settings.gradle updated to reference both the app and library modules.
settings.gradle: include ':app', ':libraries:lib1', ':libraries:lib2'
Also make sure that the app's build.gradle has the followng:
dependencies {
compile project(':libraries:lib1')
}
You should have the following structure:
MyProject/
| settings.gradle
+ app/
| build.gradle
+ libraries/
+ lib1/
| build.gradle
+ lib2/
| build.gradle
The app's build.gradle should use the com.android.application plugin while any libraries' build.gradle should use the com.android.library plugin.
The Android Studio IDE should update if you're able to build from the command line with this setup.
For Intellij IDEA (and Android Studio) each library is a Module. Think of a Module in Android Studio as an equivalent to project in Eclipse. Project in Android Studio is a collection of modules. Modules can be runnable applications or library modules.
So, in order to add a new android library project to you need to create a module of type "Android library". Then add this library module to the dependency list of your main module (Application module).
The simplest way for me to create and reuse a library project:
On an opened project file > new > new module (and answer the UI questions)
check/or add if in the file settings.gradle: include ':myLibrary'
check/or add if in the file build.gradle:
dependencies {
...
compile project(':myLibrary')
}
To reuse this library module in another project, copy it's folder in the project instead of step 1 and do the steps 2 and 3.
You can also create a new studio application project
You can easily change an existing application module to a library module by changing the plugin assignment in the build.gradle file to com.android.library.
apply plugin: 'com.android.application'
android {...}
to
apply plugin: 'com.android.library'
android {...}
more here
You can add a new module to any application as Blundell says on his answer and then reference it from any other application.
If you want to move the module to any place on your computer just move the module folder (modules are completely independent), then you will have to reference the module.
To reference this module you should:
On build.gradle file of your app add:
dependencies {
...
compile project(':myandroidlib')
}
On settings.gradle file add the following:
include ':app', ':myandroidlib'
project(':myandroidlib').projectDir = new File(PATH_TO_YOUR_MODULE)
Don't forget to use apply plugin: 'com.android.library' in your build.gradle instead of apply plugin: 'com.android.application'
Documentation Way
This is the recommended way as per the advice given in the Android Studio documentation.
Create a library module
Create a new project to make your library in. Click File > New > New Module > Android Library > Next > (choose name) > Finish. Then add whatever classes and resourced you want to your library.
When you build the module an AAR file will be created. You can find it in project-name/module-name/build/outputs/aar/.
Add your library as a dependency
You can add your library as a dependency to another project like this:
Import your library AAR file with File > New Module > Import .JAR/.AAR Package > Next > (choose file location) > Finish. (Don't import the code, otherwise it will be editable in too many places.)
In the settings.gradle file, make sure your library name is there.
include ':app', ':my-library-module'
In the app's build.gradle file, add the compile line to the dependencies section:
dependencies {
compile project(":my-library-module")
}
You will be prompted to sync your project with gradle. Do it.
That's it. You should be able to use your library now.
Notes
If you want to make your library easily available to a larger audience, consider using JitPac or JCenter.
Had the same question and solved it the following way:
Start situation:
FrigoShare (root)
|-Modules: frigoshare, frigoShare-backend
Target: want to add a module named dataformats
Add a new module (e.g.: Java Library)
Make sure your settings.gradle look like this (normally automatically):
include ':frigoshare', ':frigoShare-backend', ':dataformats'
Make sure (manually) that the build.gradle files of the modules that need to use your library have the following dependency:
dependencies {
...
compile project(':dataformats')
}
Purpose: Android library at single place - Share across multiple projects
http://raevilman.blogspot.com/2016/02/android-library-project-using-android.html
As theczechsensation comment above I try to search about Gradle Build Varians and I found this link: http://code.tutsplus.com/tutorials/using-gradle-build-variants--cms-25005
This is a very simple solution. This is what I did:
- In build.gradle:
flavorDimensions "version"
productFlavors {
trial{
applicationId "org.de_studio.recentappswitcher.trial"
flavorDimension "version"
}
pro{
applicationId "org.de_studio.recentappswitcher.pro"
flavorDimension "version"
}
}
Then I have 2 more version of my app: pro and trial with 2 diffrent packageName which is 2 applicationId in above code so I can upload both to Google Play. I still just code in the "main" section and use the getpackageName to switch between to version. Just go to the link I gave for detail.
There are two simplest ways if one does not work please try the other one.
Add dependency of the library inside dependency inside build.gradle file of the library u r using, and paste ur library in External Libraries.
OR
Just Go to your libs folder inside app folder and paste all your .jar e.g Library files there Now the trick here is that now go inside settings.gradle file now add this line "include ':app:libs'" after "include ':app'" It will definitely work...........:)
In my case, using MAC OS X 10.11 and Android 2.0, and by doing exactly what Aqib Mumtaz has explained.
But, each time, I had this message : "A problem occurred configuring project ':app'. > Cannot evaluate module xxx : Configuration with name 'default' not found."
I found that the reason of this message is that Android 2.0 doesn't allow to create a library directly. So, I have decided first to create an app projet and then to modify the build.gradle in order to transform it as a library.
This solution doesn't work, because a Library project is very different than an app project.
So, I have resolved my problem like this :
First create an standard app (if needed) ;
Then choose 'File/Create Module'
Go to the finder and move the folder of the module freshly created in your framework directory
Then continue with the solution proposed by Aqib Mumtaz.
As a result, your library source will be shared without needing to duplicate source files each time (it was an heresy for me!)
Hoping that this help you.
Assuming all my Gradle plugin user going to have a MYAPP_HOME sys variable set in there system
in MYAPP_HOME page i have a jar at $MYAPP_HOME/lib/mylib.jar
i am writing my own plugin....
I can find the MYAPP_HOME variable is set and fine the jar exists..
How can i add this jar dependency in my custom gradle plugin... ? when user runs my plugin say compileMyplugin my custom gradle plugin need to set the $MYAPP_HOME/lib/mylib.jar jar as compiler dependent
How to do this any one help me ?
The plugin just needs to do:
project.dependencies {
compile project.files("${System.getenv("MYAPP_HOME")}/lib/mylib.jar"))
}
PS: In general, I wouldn't recommend relying on an environment variable and the availability of a Jar on the local file system. Instead, I'd publish the Jar to an artifact repository or put it under source control.
Is there any way to access Gradle groovy plugin sourceSets dirs from my Groovy project built by Gradle? I am looking for default gradle src and resources directories.
I need it to avoid hardcoding a resources directory in my project but use the default Groovy plugin resource directory (resources/main).
You shouldn't mix up your production code with your test sources and your test resources. I would suggest the following layout (the default of the groovy plugin) of your src directories in your project:
groovy production code in "src/main/groovy"
unit tests written in java or groovy in "src/test/groovy"
*.groovy resources for testing your DSL in "src/test/resources"
Now you can reference the .groovy dsl test files from your tests via
URL url = this.getClass().getResource("/testDsl.groovy");
File testDslFile = new File(url.getFile());
Can you explain the use case for that? within your gradle build you can access the groovy sourceSets dirs introduced by Gradles groovy plugin like this:
apply plugin:'groovy'
task printGroovySourceDirs << {
sourceSets.main.groovy.srcDirs.each{
println it.absolutePath
}
}