DexArchiveBuilderExceptionについて

Android開発をしていて、okHttpを使おうと思い、implementするとDexArchiveBuilderExceptionという謎のエラーが発生しました。

java.lang.RuntimeException: com.android.build.api.transform.TransformException: com.android.builder.dexing.DexArchiveBuilderException: com.android.builder.dexing.DexArchiveBuilderException: Failed to process C:\Users\×××××××\.gradle\caches\modules-2\files-2.1\com.squareup.okhttp3\okhttp\3.14.2\eaed79ed6bc1e14fad462172b6a09524545b165c\okhttp-3.14.2.jar
    at com.android.builder.profile.Recorder$Block.handleException(Recorder.java:55)
    at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:104)
    at com.android.build.gradle.internal.pipeline.TransformTask.transform(TransformTask.java:212)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
    at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.doExecute(IncrementalTaskAction.java:46)
    at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:39)
    at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:26)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:121)
    // 長いので省略
Caused by: com.android.build.api.transform.TransformException: com.android.builder.dexing.DexArchiveBuilderException: com.android.builder.dexing.DexArchiveBuilderException: Failed to process C:\Users\××××××\.gradle\caches\modules-2\files-2.1\com.squareup.okhttp3\okhttp\3.14.2\eaed79ed6bc1e14fad462172b6a09524545b165c\okhttp-3.14.2.jar
    at com.android.build.gradle.internal.transforms.DexArchiveBuilderTransform.transform(DexArchiveBuilderTransform.java:327)
    at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:221)
    at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:217)
    at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:102)
    ... 48 more

ん？初めて見るなあ、しかも長いと思っていたら、下の方に対処法が載っているいいログでした。

Caused by: com.android.builder.dexing.DexArchiveBuilderException: Error while dexing.
The dependency contains Java 8 bytecode. Please enable desugaring by adding the following to build.gradle
android {
    compileOptions {
        sourceCompatibility 1.8
        targetCompatibility 1.8
    }
}
See https://developer.android.com/studio/write/java8-support.html for details. Alternatively, increase the minSdkVersion to 26 or above.

    at com.android.builder.dexing.D8DexArchiveBuilder.getExceptionToRethrow(D8DexArchiveBuilder.java:169)
    at com.android.builder.dexing.D8DexArchiveBuilder.convert(D8DexArchiveBuilder.java:146)
    at com.android.build.gradle.internal.transforms.DexArchiveBuilderTransform.launchProcessing(DexArchiveBuilderTransform.java:798)
    ... 6 more

リファレンスを見ると、今回適用するokHttpがJava8に言語機能を使うので、compileOptionsを明記しないといけないようです。

なので、build.gradle(app)に下記を追加しました。

compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

もしくはminsdkのバージョンを26に設定しても解決しそうです。

優良なログでよかった!!!