Question

我无法运行任何版本的Android Studio 2.x.在＆lt;之后，它似乎随机地崩溃了同样的例外。 1分钟只需浏览项目中的文件：

Exception Name: JavaNativeException
Description: java.lang.NullPointerException
    at sun.lwawt.macosx.CAccessibility.getAccessibleIndexInParent(CAccessibility.java:287)

User Info: (null)

0   CoreFoundation                      0x00007fff94a9e4f2 __exceptionPreprocess + 178
1   libobjc.A.dylib                     0x00007fff88d51f7e objc_exception_throw + 48
2   CoreFoundation                      0x00007fff94a9e439 -[NSException raise] + 9
3   JavaNativeFoundation                0x000000011be9251f JNFCallStaticIntMethod + 236
4   libawt_lwawt.dylib                  0x000000011d7c8deb +[JavaComponentAccessibility createWithAccessible:withEnv:withView:] + 76
5   libawt_lwawt.dylib                  0x000000011d7c930b -[JavaComponentAccessibility accessibilityFocusedUIElement] + 194
6   libawt_lwawt.dylib                  0x000000011d79e4f6 -[AWTView accessibilityFocusedUIElement] + 156
7   AppKit                              0x00007fff98c44d37 -[NSWindow(NSWindowAccessibility) accessibilityFocusedUIElement] + 118
8   libawt_lwawt.dylib                  0x000000011d7c9069 +[JavaComponentAccessibility postFocusChanged:] + 96
9   Foundation                          0x00007fff9427af5e __NSThreadPerformPerform + 279
10  CoreFoundation                      0x00007fff94a33881 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
11  CoreFoundation                      0x00007fff94a12fbc __CFRunLoopDoSources0 + 556
12  CoreFoundation                      0x00007fff94a124df __CFRunLoopRun + 927
13  CoreFoundation                      0x00007fff94a11ed8 CFRunLoopRunSpecific + 296
14  HIToolbox                           0x00007fff963fe935 RunCurrentEventLoopInMode + 235
15  HIToolbox                           0x00007fff963fe76f ReceiveNextEventCommon + 432
16  HIToolbox                           0x00007fff963fe5af _BlockUntilNextEventMatchingListInModeWithFilter + 71
17  AppKit                              0x00007fff98463efa _DPSNextEvent + 1067
18  AppKit                              0x00007fff9846332a -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454
19  libosxapp.dylib                     0x000000011d8503aa -[NSApplicationAWT nextEventMatchingMask:untilDate:inMode:dequeue:] + 124
20  AppKit                              0x00007fff98457e84 -[NSApplication run] + 682
21  libosxapp.dylib                     0x000000011d85014d +[NSApplicationAWT runAWTLoopWithApp:] + 156
22  libawt_lwawt.dylib                  0x000000011d7dd4b3 -[AWTStarter starter:] + 905
23  Foundation                          0x00007fff9427af5e __NSThreadPerformPerform + 279
24  CoreFoundation                      0x00007fff94a33881 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
25  CoreFoundation                      0x00007fff94a12fbc __CFRunLoopDoSources0 + 556
26  CoreFoundation                      0x00007fff94a124df __CFRunLoopRun + 927
27  CoreFoundation                      0x00007fff94a11ed8 CFRunLoopRunSpecific + 296
28  studio                              0x00000001000012f3 main + 357
29  studio                              0x000000010000116c start + 52
30  ???                                 0x0000000000000001 0x0 + 1

我正在使用Java版本1.8.0_92运行OS X 10.11.4。

我在做拖拽的过程中看到了其他一些对此问题的引用。放弃操作，但升级JDK版本的公认解决方案似乎并没有解决我的问题。

FWIW我能够在不遇到此问题的情况下运行Studio 1.5。

Answer 1

回答实际发生的原因，但source有这个：

    public static int getAccessibleIndexInParent(final Accessible a, final Component c) {
        if (a == null) return 0;

        return invokeAndWait(new Callable<Integer>() {
            public Integer call() throws Exception {
                final AccessibleContext ac = a.getAccessibleContext();
                if (ac == null) return null;
                return ac.getAccessibleIndexInParent();
            }
        }, c);
    }

正如您所看到的，Callable在某些情况下会返回null，这对于Integer来说很好，但是一旦取消将其返回int，您就会获得NPE。他们可能应该检查null并返回0。

Android Studio 2.0+在OS X上崩溃

1 个答案: