本文将带你了解Android应用开发之Android Studio编译失败问题（aapt2），希望本文对大家学Android有所帮助。

Android   Studio 3.1编译时出错：
?1234567org.gradle.api.tasks.TaskExecutionException:   Execution failed for task   ':app:mergeDebugResources'.    at   org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:100)    at   org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:70)    at   org.gradle.api.internal.tasks.execution.OutputDirectoryCreatingTaskExecuter.execute(OutputDirectoryCreatingTaskExecuter.java:51)    at   org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:62)    at   org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54)    at   org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:60)
?1234Caused by: Error:   java.util.concurrent.ExecutionException:   com.android.builder.internal.aapt.v2.Aapt2Exception: AAPT2 error: check logs   for details    at   com.android.ide.common.res2.MergedResourceWriter.end(MergedResourceWriter.java:332)    at   com.android.ide.common.res2.DataMerger.mergeData(DataMerger.java:301)    at   com.android.ide.common.res2.ResourceMerger.mergeData(ResourceMerger.java:412)
根据网上说的添加了android.enableAapt2=false，一开始都OK后来创建新项目又出了问题：
?12345org.gradle.api.tasks.TaskExecutionException:   Execution failed for task   ':app:transformDexWithInstantRunDependenciesApkForDebug'.    at   org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:100)    at   org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:70)    at   org.gradle.api.internal.tasks.execution.OutputDirectoryCreatingTaskExecuter.execute(OutputDirectoryCreatingTaskExecuter.java:51)    at   org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:62)
根据查找说是修改一个Android Studiio 一个配置就可以，取消选中Enable   Instant Run ：
   
    修改之后真的可以运行了，但取消这个选中之后编写代码会非常麻烦，资源文件的引用非常麻烦，需要手写，还需要重新编译才能看出是否正确。
?123java.lang.RuntimeException:   com.android.build.api.transform.TransformException:   com.android.ide.common.process.ProcessException: Failed to execute   aapt    at   com.android.builder.profile.Recorder$Block.handleException(Recorder.java:55)    at   com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:104)
最后查看log感觉还是aapt的问题，果然把android.enableAapt2=false   改为true就可以了。
   
    附：一个提示编译时错误的方法 gradlew compileDebugJavaWithJavac    

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