Re: Gradle: How to include libs properly?

[Szabolcs Berecz]

Hi,

You put the "compile fileTree(dir: 'libs', include: '*.jar')" in the wrong section. You need to put it in a toplevel "dependencies" section, because that's what describes the dependencies of your project.
The section "buildscript" describes the configuration of your build script, and that's why the "classpath 'com.android.tools.build:gradle:0.2'" is in this section: you need the gradle android plugin to build your android project.

So, remove the "compile..." from "buildscript.dependencies" and put this after the "android" section:
dependencies {
  compile fileTree(dir: 'libs', include: '*.jar')
}

Regards,
Szabolcs

On Tue, Nov 27, 2012 at 11:09 AM, Stefan Hoth <stefan...@gmail.com> wrote:

Hi there,

after I've seen the introduction at Devoxx I wanted to migrate a current project from Ant to Gradle.

For the easiest choice I picked the "migrated"-example from the samples and adapted a bit.

This is what it looks like now:

build.gradle:

buildscript {

   repositories {

       mavenCentral()

   }

   dependencies {

       classpath 'com.android.tools.build:gradle:0.2'

       compile fileTree(dir: 'libs', include: '*.jar')

   }

   

}

apply plugin: 'java'

tasks.withType(Compile) {

   options.encoding = 'UTF-8'

}

apply plugin: 'android'

android {

target = 'android-16'

   defaultConfig {

       versionCode = 3

       versionName = '1.0.1'

   

   signingStoreLocation = "deployment/debug.keystore"

   signingStorePassword = "android"

   signingKeyAlias = "androiddebugkey"

   signingKeyPassword = "android"

   }

   sourceSets {

       main {

           manifest {

               srcFile 'AndroidManifest.xml'

           }

           java {

               srcDir 'src'

               //exclude 'some/unwanted/package/**'

           }

           res {

               srcDir 'res'

           }

           assets {

               srcDir 'assets'

           }

           resources {

               srcDir 'src'

           }

       }

       test {

           java {

               srcDir 'tests/src'

           }

       }

       // Could also be done with:

       //main.manifest.srcFile 'AndroidManifest.xml'

       //main.java.srcDir 'src'

       //main.res.srcDir 'res'

       //main.assets.srcDir 'assets'

       //main.resources.srcDir 'src'

       //test.java.srcDir 'tests/src'

   }

buildTypes {

       debug {

           packageNameSuffix = ".debug"

       }

       staging {

           packageNameSuffix = ".staging"

           debuggable = true

           debugSigned = true

           zipAlign = false

       }

   }    

}

My current problem is that I never got it to work properly because I can't find the examples on how to include 

a) either the jars in ./libs/ to be used 

or

b) the maven dependencies for the libs.

List of used libs:

GoogleAnalytics-1.5.1.jar

android-support-v4.jar

android-support-v7-gridlayout.jar

androlog-1.0.5-sources.jar

androlog-1.0.5.jar

gson-2.2.2-sources.jar

gson-2.2.2.jar

zxing-core-2.0-javadoc.jar

zxing-core-2.0.jar

With the current setup of the file above I get the following error:

Compiling build file './build.gradle' using BuildScriptClasspathScriptTransformer.

FAILURE: Build failed with an exception.

* Where:

Build file './build.gradle' line: 8

* What went wrong:

A problem occurred evaluating root project 'gradletest'.

> No signature of method: org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.compile() is applicable for argument types: (org.gradle.api.internal.file.collections.DefaultConfigurableFileTree) values: [directory 'libs']

Possible solutions: module(java.lang.Object) 

I'm just not familiar at all with gradle so I'm pretty much helpless. I'd apriciate if anyone could point me to suggestion on how to get a successful build from where I can explore more options.

Thanks,

Stefan

[Xavier Ducrohet]

On top of this you should not apply the Java plugin. It would create additional tasks that could create problem (particularly if you start putting tests under src/test/java and run "gradle check")

You can still put 

    tasks.withType(Compile) {

        options.encoding = 'UTF-8'

  }

after you apply the android plugin.

--
Xavier Ducrohet
Android SDK Tech Lead
Google Inc.
http://developer.android.com | http://tools.android.com

Please do not send me questions directly. Thanks!

[Stefan Hoth]

Thank you both for the pointers, it really helped understand the syntax better.

I now face a different problem: The compiler doesn't know any class from the Android SDK (neither base nor Google APIs) so the build fails yet again. 

Do I need to use the Maven SDK installer to provide those libs and include them as dependencies?

Or did I miss anything else?

Thanks

- Stefan

PS: Working on a Windows machine if that is of importance.

[Xavier Ducrohet]

You don't need the Maven SDK. The Gradle plugin will find android.jar from your Android SDK directly.

Do you only have a compilation error? Nothing else? that's strange since it means it found the Android SDK, found the API 16 but then didn't use it? I'm not sure what would trigger this.

[Stefan Hoth]

This is the output I'm getting:

C:\coding\gradletest>gradle clean build

:clean

:prepareDebugDependencies

:compileDebugAidl

Ignoring platform 'android-7': build.prop is missing.

:generateDebugBuildConfig

:crunchDebugRes

ERROR: 9-patch image C:\coding\gradletest\res\drawable-hdpi\fade_black_to_transparent.9.png malformed.

       No marked region found along edge.

       Found along left edge.

:processDebugManifest

:processDebugRes

:compileDebug

C:\coding\gradletest\src\de\wall\bluespot\activities\SpotMapActivity.java:22: package com.google.android.maps does not exist

import com.google.android.maps.*;

^

C:\coding\gradletest\src\de\wall\bluespot\activities\SpotMapActivity.java:37: cannot find symbol

symbol: class MapActivity

public class SpotMapActivity extends MapActivity {

[...]

100 errors

:compileDebug FAILED

FAILURE: Build failed with an exception.

* What went wrong:

Execution failed for task ':compileDebug'.

> Compilation failed; see the compiler error output for details.

I can't spot the error. Here's my current build.gradle again to make sure I did everything right: https://gist.github.com/4196894

Thanks for helping out.

- Stefan

[Xavier Ducrohet]

You are using the maps API, meaning you should be compiling against the proper target, but your gradle file says:

android {

  target = 'android-16'

}

This value is the same as what was in project.properties. Based on the rest of your build.gradle it almost looked like you copied it from a sample without really understanding what was in there (do you really need a 'staging' build type?)

Anyway, just put what you would have had in your project.properties in the android.target property.

Probably something like "Google Inc.:Google APIs:16"

[Stefan Hoth]

Xavier,

thank you for your kind help. I finally got around to build my project with gradle.

And your impression was right: As I said in my first mail I am indeed a newbie in gradle so I took a sample and tried to adjust it to my needs. Sorry if I confused or missed things an experienced developer would have catched right away. Certainly trying to learn quickly.

Thanks again,

Stefan