Question

我不明白为什么会出现这个错误。我正在另一台计算机上编译并且发布编译没问题，但是在这台计算机上，我得到了：

Relying on packaging to define the extension of the main artifact has been deprecated and is scheduled to be removed in Gradle 2.0
:app:preBuild
:app:preReleaseBuild
:app:checkReleaseManifest
:app:preDebugBuild
:app:prepareComAndroidSupportAppcompatV71910Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServices4323Library UP-TO-DATE
:app:prepareReleaseDependencies
:app:compileReleaseAidl
:app:compileReleaseRenderscript
:app:generateReleaseBuildConfig
:app:mergeReleaseAssets
:app:processReleaseManifest
:app:crashlyticsCleanupResourcesRelease
:app:crashlyticsUploadStoredDeobsRelease
:app:crashlyticsGenerateResourcesRelease
:app:generateReleaseResValues UP-TO-DATE
:app:generateReleaseResources
:app:mergeReleaseResources
:app:processReleaseResources
:app:generateReleaseSources
:app:compileReleaseJava
/Users/wimha/wimhaAndroidApp/app/src/main/java/com/google/zxing/client/android/camera/AutoFocusManager.java:63: error: method executeOnExecutor in class AsyncTask<Params,Progress,Result> cannot be applied to given types;
      outstandingTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
                     ^
  required: Executor,CAP#1[]
  found: Executor
  reason: formal varargs element type CAP#1 is not accessible from class AutoFocusManager
  where Params,Progress,Result are type-variables:
    Params extends Object declared in class AsyncTask
    Progress extends Object declared in class AsyncTask
    Result extends Object declared in class AsyncTask
  where CAP#1 is a fresh type-variable:
    CAP#1 extends Object from capture of ?
/Users/wimha/wimhaAndroidApp/app/src/main/java/com/google/zxing/client/android/InactivityTimer.java:52: error: method executeOnExecutor in class AsyncTask<Params,Progress,Result> cannot be applied to given types;
    inactivityTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
                  ^
  required: Executor,CAP#1[]
  found: Executor
  reason: formal varargs element type CAP#1 is not accessible from class InactivityTimer
  where Params,Progress,Result are type-variables:
    Params extends Object declared in class AsyncTask
    Progress extends Object declared in class AsyncTask
    Result extends Object declared in class AsyncTask
  where CAP#1 is a fresh type-variable:
    CAP#1 extends Object from capture of ?
/Users/wimha/wimhaAndroidApp/app/src/main/java/com/google/zxing/client/android/share/AppPickerActivity.java:35: error: method executeOnExecutor in class AsyncTask<Params,Progress,Result> cannot be applied to given types;
    backgroundTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
                  ^
  required: Executor,CAP#1[]
  found: Executor
  reason: formal varargs element type CAP#1 is not accessible from class AppPickerActivity
  where Params,Progress,Result are type-variables:
    Params extends Object declared in class AsyncTask
    Progress extends Object declared in class AsyncTask
    Result extends Object declared in class AsyncTask
  where CAP#1 is a fresh type-variable:
    CAP#1 extends Object from capture of ?
3 errors
:app:compileReleaseJava FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileReleaseJava'.
> 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: 1 mins 56.213 secs

有什么想法吗？

Answer 1

卸载Java 8解决了它。

How to uninstall JDK 1.8

Answer 2

您不需要卸载Java 8.只需打开“项目结构”（Ctrl + alt + shift + s），选择“SDK Location”并将“JDK location”设置为JDK 7的路径。

Answer 3

我通过替换像这样的匿名声明解决了

private AsyncTask<?, ?, ?> outstaindingTask;

与实际类型：

private AsyncTask<Object, Object, Object> outstandingTask;

您可以通过查看已实例化的类定义来查找要使用的类型列表，例如在AutoFocusManager的情况下：

outstandingTask = new AutoFocusTask();

AutoFocusTask类声明为：

private final class AutoFocusTask extends AsyncTask<Object,Object,Object>

Answer 4

我不确定你是如何编译这段代码的，但它作为Java代码是正确的。它与Maven构建编译良好。这似乎是您正在使用的编译器中的错误。

编译android zxing版本时出错而不是调试

4 个答案: