BUILD FAILED

[zhangjunhou]

:app:generateDebugSources UP-TO-DATE
:app:processDebugJavaRes UP-TO-DATE
:app:compileDebugJavaWithJavac UP-TO-DATE
:app:compileDebugNdk UP-TO-DATE
:app:compileDebugSources UP-TO-DATE
:app:preDexDebug UP-TO-DATE
:app:dexDebug
Unknown source file : UNEXPECTED TOP-LEVEL EXCEPTION:
Unknown source file : com.android.dex.DexException: Multiple dex files define Landroid/support/v7/appcompat/R$anim;
Unknown source file : at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:596)
Unknown source file : at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:554)
Unknown source file : at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:535)
Unknown source file : at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:171)
Unknown source file : at com.android.dx.merge.DexMerger.merge(DexMerger.java:189)
Unknown source file : at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:502)
Unknown source file : at com.android.dx.command.dexer.Main.runMonoDex(Main.java:334)
Unknown source file : at com.android.dx.command.dexer.Main.run(Main.java:277)
Unknown source file : at com.android.dx.command.dexer.Main.main(Main.java:245)
Unknown source file : at com.android.dx.command.Main.main(Main.java:106)

:app:dexDebug FAILED

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':app:dexDebug'.

  com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/Library/Java/JavaVirtualMachines/jdk1.8.0_91.jdk/Contents/Home/bin/java'' finished with non-zero exit value 2

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 10.67 secs
Could not install the app on the device, read the error above for details.
Make sure you have an Android emulator running or a device connected and have
set up your Android development environment:
https://facebook.github.io/react-native/docs/android-setup.html

[renganatha10]

hi
Try this
cd android
./gradlew clean

[ivpusic]

will close this one. if you still have issues, please reopen

[RajaSaravanan]

react-native-image-picker/react-native-image-picker#882
Try it. It worked for me. Basically I upgraded my react-native to 0.56.0, but unfortunately react-native-image-picker was working in lower version, so the android gradle thrown dependencies error.