Android Studio: Failed to load dx.jar -

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when run module in android studio error:

error:android dex: [gradledevbuild] failed load dx.jar

i have searched endlessly solution online related eclipse, there nothing when comes android studio.

the path dex.jar c:\androidsdk\build-tools\26.0.0\lib\dex.jar exists, i've moved out of folder , notified moved aware of is. have tried copying root directory , platform-tools folder did nothing.

this full list of errors seem stemming dx.jar error. 

error:android dex: [gradledevbuild] failed load dx.jar error:android dex: [gradledevbuild] java.lang.classnotfoundexception: com.android.dx.command.dxconsole error:android dex: [gradledevbuild] @ java.net.urlclassloader.findclass(urlclassloader.java:381) error:android dex: [gradledevbuild] @ java.lang.classloader.loadclass(classloader.java:424) error:android dex: [gradledevbuild] @ java.lang.classloader.loadclass(classloader.java:357) error:android dex: [gradledevbuild] @ org.jetbrains.android.compiler.tools.androiddxrunner.loaddex(androiddxrunner.java:80) error:android dex: [gradledevbuild] @ org.jetbrains.android.compiler.tools.androiddxrunner.rundex(androiddxrunner.java:136) error:android dex: [gradledevbuild] @ org.jetbrains.android.compiler.tools.androiddxrunner.main(androiddxrunner.java:336) error:android dex: [gradledevbuild] exception in thread "main" java.lang.nullpointerexception error:android dex: [gradledevbuild] @ org.jetbrains.android.compiler.tools.androiddxrunner.rundex(androiddxrunner.java:139)

i clean installed android studio on os x , ubuntu , had same issue. fixed downgrading build tools 25.0.3.

for @emjapeve:

  • select sdk manager (tools/android/sdk manager).
  • hit sdk tools tab, default shows current tool versions.
  • select show package details checkbox.

from here can install / uninstall versions wish.





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