Execution failed for task ':app:compileDebugJavaWithJavac':

Question

When I try $ react-native run-android on android emulator, I get this error:

:app:compileDebugJavaWithJavac
/home/user/app/android/app/src/main/java/com/package/MainApplication.java:8: error: a type with the same simple name is already defined by the single-type-import of RNAWSCognitoPackage
import com.airlabsinc.RNAWSCognitoPackage;
^
1 error
Incremental compilation of 1 classes completed in 0.448 secs.
:app:compileDebugJavaWithJavac FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

* 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: 10.964 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/getting-started.html

Then I have 2 imports with the same name in my /home/user/app/android/app/src/main/java/com/package/MainApplication.java May this cause the issue? Is this the issue with RN?

package com.package;

import android.app.Application;

import com.facebook.react.ReactApplication;
import com.amazonaws.RNAWSCognitoPackage; // 1
import com.amazonaws.amplify.pushnotification.RNPushNotificationPackage;
import com.airlabsinc.RNAWSCognitoPackage; // 2
import com.horcrux.svg.SvgPackage;
import com.toast.ToastPackage;
import com.vdi.VDIPackage;
import com.BV.LinearGradient.LinearGradientPackage;
import com.facebook.react.ReactNativeHost;
import com.facebook.react.ReactPackage;
import com.facebook.react.shell.MainReactPackage;
import com.facebook.soloader.SoLoader;

import java.util.Arrays;
import java.util.List;

My env:

**Environment**:
  * OS: Linux 4.13
  * Node: 8.9.4
  * Yarn: Not Found
  * npm: 5.6.0
  * Watchman: Not Found
  * Xcode: N/A
  * Android Studio: Not Found

**Packages**: (wanted => installed)
  * react: 16.3.0-alpha.2 => 16.3.0-alpha.2
  * react-native: 0.54.2 => 0.54.2

Answer 1

You cannot import the same class from different packages in JAVA, I suggest you remove the first import :

- import com.amazonaws.RNAWSCognitoPackage; // 1 (remove this line)