I have a problem with migrating my IntelliJ IDEA project to Android Studio using a gradle build. I have set up the AndroidAnnotations library like recommended in various other posts, and it works just fine. But, when compiling my project multiple times without executing the :clean
task in between, I get following error messages:
/project-dir/build/source/apt_generated/flavor1/release/com/example/app/MyActivity_.java:15: error: duplicate class: com.example.app.MyActivity_
[more errors here...]
I believe that multiple builds in series fail because AndroidAnnotations re-creates the *_.java
files always before the :compile
tasks (without checking whether it is necessary or not) and the :compile
task recognizes the new files (e.g using timestamp) but already finds those as pre-compiled *.class
files, thus throwing the error. Is this possible? How can I prevent this behavior? Can I add a necessity-check for AndroidAnnotations? Or is this some other problem?
UPDATE 1: It seems that the error is thrown from AndroidAnnotations itself, since :compile
works when I delete the *.java
files inside the apt_generated
folder manually.
UPDATE 2:
I removed following line from my build.gradle
:
// Automatically add the generated source code to the source set
android.sourceSets[getSourceSetName(variant)].java.srcDirs += aptOutput
I don't exactly know why it works without this line. Since I did not add the folder using Android Studio's Mark Directory as > Sources Root
. Probably this is some result of caching? Or does gradle somehow add my generated java files automatically to the classpath?
I would be thankful for any comments nonetheless.
UPDATE 3 / SOLUTION
After removing the line and synchronizing the gradle build file with Android Studio, the auto-generated source code was removed as Source Root, causing the IDE to show errors of missing classes.
Eventually, I found the solution on the Android Annotations github issues: https://github.com/excilys/androidannotations/issues/676
I re-added the statement for adding it to the source sets (allowing Android Studio to show it as source root). Furthermore, I removed the files from the variants source collection using this:
variant.javaCompile.source = variant.javaCompile.source.filter { p ->
return !p.getPath().startsWith(aptOutputDir.getPath())
}
Now the generated files are recognized, and the duplicate class error is gone.
Best regards,
David
Here is my final build.gradle. I hope this helps some of you:
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:0.5.+'
}
}
apply plugin: 'android'
repositories {
mavenCentral()
}
configurations {
// This is the annotations processor dependency configuration.
apt
}
def getSourceSetName(variant) {
return new File(variant.dirName).getName();
}
android {
compileSdkVersion 18
defaultConfig {
versionCode 10
versionName "1.0.2"
targetSdkVersion 17
minSdkVersion 10
}
buildToolsVersion "18.0.1"
buildTypes {
release {
zipAlign true
}
}
productFlavors {
flavor1 {}
flavor2 {}
}
// This has to go after the productFlavors command (otherwise moving the flavor source set root fails).
sourceSets {
main {
manifest.srcFile 'AndroidManifest.xml'
java.srcDirs = ['src']
resources.srcDirs = ['src']
aidl.srcDirs = ['src']
renderscript.srcDirs = ['src']
res.srcDirs = ['res']
assets.srcDirs = ['assets']
}
// We move the root of our flavors to support our legacy structure.
flavor1.setRoot('flavors/flavor1')
flavor2.setRoot('flavors/flavor2')
}
applicationVariants.all { variant ->
def aptOutputDir = project.file("${project.buildDir}/source/apt_generated")
def aptOutput = new File(aptOutputDir, variant.dirName)
println "****************************"
println "variant: ${variant.name}"
println "manifest: ${variant.processResources.manifestFile}"
println "aptOutput: ${aptOutput}"
println "****************************"
android.sourceSets[getSourceSetName(variant)].java.srcDirs+= aptOutput.getPath()
variant.javaCompile.doFirst {
println "*** Running AndroidAnnotations for ${variant.name}"
aptOutput.mkdirs()
variant.javaCompile.options.compilerArgs += [
'-processorpath', configurations.apt.getAsPath(),
'-AandroidManifestFile=' + variant.processResources.manifestFile,
'-s', aptOutput
]
}
variant.javaCompile.source = variant.javaCompile.source.filter { p ->
return !p.getPath().startsWith(aptOutputDir.getPath())
}
}
dependencies {
// Android-Annotations
apt 'com.googlecode.androidannotations:androidannotations:2.7.1'
compile 'com.googlecode.androidannotations:androidannotations-api:2.7.1'
// Include libraries only in flavor1
flavor1Compile fileTree(dir: 'libs', include: '*.jar')
}
Here is my (initial) build.gradle
(I stripped of non relevant parts):
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:0.5.+'
}
}
apply plugin: 'android'
repositories {
mavenCentral()
}
configurations {
// This is the annotations processor dependency configuration.
apt
}
def getSourceSetName(variant) {
return new File(variant.dirName).getName();
}
android {
compileSdkVersion 18
defaultConfig {
versionCode 10
versionName "1.0.2"
targetSdkVersion 17
minSdkVersion 10
}
buildToolsVersion "18.0.1"
buildTypes {
release {
zipAlign true
}
}
productFlavors {
flavor1 {}
}
// This has to go after the productFlavors command (otherwise moving the flavor source set root fails).
sourceSets {
main {
manifest.srcFile 'AndroidManifest.xml'
java.srcDirs = ['src']
resources.srcDirs = ['src']
aidl.srcDirs = ['src']
renderscript.srcDirs = ['src']
res.srcDirs = ['res']
assets.srcDirs = ['assets']
}
// We move the root of our flavor to support our legacy structure.
flavor1.setRoot('flavors/flavor1')
}
applicationVariants.all { variant ->
aptOutput = file("${project.buildDir}/source/apt_generated/${variant.dirName}")
println "****************************"
println "variant: ${variant.name}"
println "manifest: ${variant.processResources.manifestFile}"
println "aptOutput: ${aptOutput}"
println "****************************"
// Automatically add the generated source code to the source set
android.sourceSets[getSourceSetName(variant)].java.srcDirs += aptOutput
variant.javaCompile.doFirst {
println "*** Running AndroidAnnotations for ${variant.name}"
aptOutput.mkdirs()
variant.javaCompile.options.compilerArgs += [
'-processorpath', configurations.apt.getAsPath(),
'-AandroidManifestFile=' + variant.processResources.manifestFile,
'-s', aptOutput
]
}
}
}
dependencies {
// Android-Annotations
apt 'com.googlecode.androidannotations:androidannotations:2.7.1'
compile 'com.googlecode.androidannotations:androidannotations-api:2.7.1'
// Include libraries only in flavor1
flavor1Compile fileTree(dir: 'libs', include: '*.jar')
}
I would appreciate any help.
Thanks,
David