Develop Reference

Gradle doesn't find acra

I have an Android project in which I have been using ACRA 4.6.0 with a static jar file, all working fine. I have tried to change this to use the latest ACRA by the maven dependency in build.gradle:
dependencies {
compile fileTree(dir: 'libs', include: '*.jar')
testCompile 'junit:junit:4.12'
compile 'ch.acra:acra:4.8.5'
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.android.support:design:23.4.0'
}
in my build.gradle. However this causes the build to fail with errors like:
CJApp.java:13: error: cannot find symbol
import org.acra.ACRAConfiguration;
^
symbol: class ACRAConfiguration
location: package org.acra
So far as I can tell gradle is not downloading anything for acra. I have tried adding mavenCentral() to the repositories list with no effect.
What else do I need to do, and is there any way of determining just what gradle has downloaded?

Are you sure that the class org.acra.ACRAConfiguration is included in the new version: acra:4.8.5 which you're suddenly linking to? If not, this is a simple matter of incompatibility. In that case, it should be resolved if you step the version back to 4.6.0.
Have you checked that the build downloads the file from Maven Central? This should be clearly visible when giving gradle the -i flag - it will print every URL as it downloads them.

ACRAConfiguration has moved to org.acra.config. Just adjust your import.

Is commenting junit test in Android Studio a safe way?

I recently migrated from Eclipse to Android Studio and I'm using Android Studio 1.5.1. Before when I started Android Studio, I got this error:
Failed to resolve: junit:junit:4.12
After searching in Google and trying some proposed options, only commenting junit test in app/build.gradle solved the problem:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
// testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.0.0'
compile 'com.android.support:design:23.0.0'
}
But I want to know is this a good and safe option to resolve that problem? For example does it cause any problem in future?

You will need to add the following to your build.gradle file and it should work fine.
repositories {
maven { url 'http://repo1.maven.org/maven2' }
}

Why can't I add Facebook SDK on Android Studio?

I am following the Getting Started, Facebook Android SDK.
But when I am adding the repositories and the dependencies, I get the following error:
Error: Module version com.facebook.android:facebook-android-sdk:4.1.0 depends on libraries but is not a library itself.
I tried with several versions of the SDK but I can't make it work.
This is how my gradle looks:
dependencies{
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:21.0.3'
compile 'com.facebook.android:facebook-android-sdk:4.1.0'
}
repositories{
mavenCentral()
}
I am using the BuildTools 22.0.1
I hope someone can orient my with this issue.
Regards

compile 'com.facebool.android:facebook-android-sdk:4.1.0' Is the facebool correct or is that an error? If that's an error then that could be your issue. Also if you can't get it to compile from a maven source try downloading a jar and putting it in your local library. Then go into the project structure and go to the module you want to add this library to and click on the dependencies tab and there is a plus icon to add a library from file.

In you build.gradle(Project:Your-Project-Name) replace jCentral() with mavenCentral() in both (allproject/repos and buildscript/repos) then sync your gradle.
Hope this helps.

Using .aar NoClassDefFoundError But Class Exists and is Dexed

I have several projects which I build to create an .aar. I then import this .aar into into Android Studio under /libs. The build.gradle file for this dependency looks as follows:
repositories{
flatDir{
dirs 'libs'
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.0.0'
compile 'com.google.android.gms:play-services:7.0.0'
compile 'com.android.support:multidex:+'
compile(name: 'customApi-debug', ext:'aar')
}
Since the library is quite large I have set multiDexEnabled = true. Android Studio finds the library and autocomplete works. Building works fine too but running the app gives the following error:
java.lang.NoClassDefFoundError: com.companyx.android.api.ui.vision.metaio.MetaIoView
at com.companyx.android.api.ui.vision.metaio.MetaIoView$$InjectAdapter.<init>(MetaIoView$$InjectAdapter.java:29)
I uncompressed and disassembled the .aar and dex files, respectively, and verified that the classes its complaining about actually exist. I've tried existing approaches for dealing with this problem but none of them worked.
Anyone else experienced this? Thanks in advance.

I run into the same issue. The fix is firstly to deploy the AAR file to a local maven (I utilized the plugin at https://github.com/dcendents/android-maven-gradle-plugin). Then I referenced to the local maven as described at https://stackoverflow.com/a/23045791/2563009. And eventually I declared the dependencies with a transitive option, like this:
dependencies {
compile('com.myapp.awesomelib:awesomelib:0.0.1#aar') {
transitive = true
}
}
The error would be gone then.

Just fyi, you can use a simpler syntax, which is valid too
compile 'com.myapp.awesomelib:awesomelib:0.0.1'
Don't forget to omit the #aar thing at the end of the library name

Can't add External Library in Android Studio?

I Added a External Library to my project by following
this method. and tried this method too this method too.
Gradle build got Finished and i got this line added to my build.gradle
compile 'com.github.castorflex.smoothprogressbar:library-circular:1.0.1'
Now i am trying to import this library in my class. But i can't do this. I took a look at the files and they are located in the build directory under the exploded-aar. so i added #aar to the compile line. Still there are no changes.
How can i import this library to my class or where i am going wrong?
Thanks in Advance

Well, you don't need to download anything or point your dependency to a file.
This dependency, as most of the dependencies you use, can automatically fetched from JCenter, biggest repository for Java and Android components.
All you need to do is:
Add JCenter as your dependencies repository.
Declare that you need the library-circular dependency. This can be found and copy/pasted from the file icon in particular package/version in JCenter.
Resync your Android Studio project with your Gradle build file. This is the 'sync' button in Gradle pane in Android Studio.
Here's what your build.gradle should include:
repositories {
jcenter()
}
dependencies {
compile(group: 'com.github.castorflex.smoothprogressbar', name: 'library-circular', version: '1.0.1', ext: 'aar')
}

in build. gradle put following code
dependencies {
compile fileTree (dir: 'libs', include: ['*.jar'])
}

Did you add the dependencies?
You can do so in the following way -
dependencies {
compile files('insert ParentFolder/external_library_name with the extension here')
}
Add it to build.gradle based in the app folder

1.Put the jar file into the libs folder.
2.Right click it and hit 'Add as library'.
3.Ensure that compile files('libs/abcdef.jar') is in your build.gradle file and Finally add the dependencies.
Eg.
dependencies {
compile fileTree(dir: '../jar', include: '*.jar')
compile project(':pull-to-refresh')
compile files('libraries/abcdef.jar')
}
Hope this helps :)