I just start using Android Studio for a week and it works great for me, but when I started Android Studio today I get the error: 'error: duplicate class: mypackage.R'. I saw this error before when I used Eclipse so I tried to rebuild the project a few times and restarting Android Studio, this didn't help.
After reading some Stackoverflow questions I tried to deleted R.java and rebuild again, now I don't get any error while rebuilding. The only problem is that Android Studio cannot resolve R, so every line which uses R gets an error (project builds and run).
I also tried to delete all the R.class files but this doesn't help either. I checked if some class imports android.R, but they all don't, they just import 'mypackage.R'. I even deleted all my files and checked out a older version of my project but I still have the same problem.
Edit:
If I don't delete R.java the compiler doesn't give any error. Just when I try to build I get a lot of errors like: 'error: cannot find symbol variable button_login'. If I search the R.java file for 'button_login' I just find it. I did this with multiple errors.
Edit2:
When I deleted all the libaries the project now builds. But the problem is that I need those libaries (HTTPComponents). I added them from maven (File --> Project Structure --> Libaries --> +-sign') and added them to my settings.graddle:
buildscript {
repositories {
maven { url 'http://repo1.maven.org/maven2' }
}
dependencies {
classpath 'com.android.tools.build:gradle:0.4'
}
}
apply plugin: 'android'
dependencies {
compile files('libs/android-support-v4.jar')
compile group: 'org.apache.httpcomponents', name: 'httpclient', version: '4.2.5'
compile group: 'org.apache.httpcomponents', name: 'httpmime', version: '4.2.5'
//compile 'org.apache.httpcomponents-httpclient:4.2.5' doesn't work either
//compile 'org.apache.httpcomponents-httpmime:4.2.5' doesn't work either
}
android {
compileSdkVersion 17
buildToolsVersion "17.0.0"
defaultConfig {
minSdkVersion 15
targetSdkVersion 16
}
}
When I run gradlew.bat --stacktrace --info assemble
I get errors that Gradle is unable to find the libaries from the maven repository. I checked the repository but they are available. http://search.maven.org/#browse%7C1628757896
Unfortunately I run into this as well, sometimes frequently, mostly happens when I put my computer to sleep and back on while Eclipse is on. Sometimes recompiling and validating the project works.
I did find this solution online somewhere, lost the link and do not claim credits for this:
If that doesn't work, try to delete the gen folder and do that process
Let me know.