启动布局检查器时“获取视图层次结构时出错：意外错误：空视图层次结构”

Question

启动Layout Inspector时收到错误消息：“获取视图层次结构时出错：意外错误：空视图层次结构”。

在Logcat中也有一个例外：

12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater I/art: Exception thrown by dispatcher for 0x56555254
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err: java.lang.NoClassDefFoundError: android.graphics.drawable.Icon
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at libcore.reflect.InternalNames.getClass(InternalNames.java:55)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at java.lang.Class.getDexCacheType(Class.java:479)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at java.lang.reflect.ArtMethod.getDexCacheType(ArtMethod.java:236)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at java.lang.reflect.ArtMethod.getParameterTypes(ArtMethod.java:176)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at java.lang.reflect.Method.getParameterTypes(Method.java:174)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at java.lang.Class.getDeclaredMethods(Class.java:802)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.getExportedPropertyMethods(ViewDebug.java:1118)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.exportMethods(ViewDebug.java:1209)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.dumpViewProperties(ViewDebug.java:1155)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.dumpViewProperties(ViewDebug.java:1141)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.dumpView(ViewDebug.java:1058)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.dumpViewHierarchy(ViewDebug.java:997)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.dumpViewHierarchy(ViewDebug.java:992)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.dumpViewHierarchy(ViewDebug.java:992)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.dumpViewHierarchy(ViewDebug.java:992)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.dumpViewHierarchy(ViewDebug.java:992)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.dumpViewHierarchy(ViewDebug.java:992)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.dumpViewHierarchy(ViewDebug.java:992)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.dumpViewHierarchy(ViewDebug.java:992)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.dumpViewHierarchy(ViewDebug.java:992)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.dumpViewHierarchy(ViewDebug.java:992)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.view.ViewDebug.dump(ViewDebug.java:855)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.ddm.DdmHandleViewDebug.dumpHierarchy(DdmHandleViewDebug.java:235)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at android.ddm.DdmHandleViewDebug.handleChunk(DdmHandleViewDebug.java:134)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at org.apache.harmony.dalvik.ddmc.DdmServer.dispatch(DdmServer.java:171)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err: Caused by: java.lang.ClassNotFoundException: Didn't find class "android.graphics.drawable.Icon" on path: DexPathList[[zip file "/data/app/com.tst.nikita.yandextranslater-2/base.apk", zip file "/data/app/com.tst.nikita.yandextranslater-2/split_lib_dependencies_apk.apk", zip file "/data/app/com.tst.nikita.yandextranslater-2/split_lib_slice_0_apk.apk", zip file "/data/app/com.tst.nikita.yandextranslater-2/split_lib_slice_1_apk.apk", zip file "/data/app/com.tst.nikita.yandextranslater-2/split_lib_slice_2_apk.apk", zip file "/data/app/com.tst.nikita.yandextranslater-2/split_lib_slice_3_apk.apk", zip file "/data/app/com.tst.nikita.yandextranslater-2/split_lib_slice_4_apk.apk", zip file "/data/app/com.tst.nikita.yandextranslater-2/split_lib_slice_5_apk.apk", zip file "/data/app/com.tst.nikita.yandextranslater-2/split_lib_slice_6_apk.apk", zip file "/data/app/com.tst.nikita.yandextranslater-2/split_lib_slice_7_apk.apk", zip file "/data/app/com.tst.nikita.yandextranslater-2/split_lib_slice_8_apk.apk", zip file "/data/app/com.tst.nikita.yandextranslater-2/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/com.tst.nikita.yandextranslater-2/lib/arm, /vendor/lib, /system/lib]]
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at libcore.reflect.InternalNames.getClass(InternalNames.java:53)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:    ... 24 more
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:    Suppressed: java.lang.ClassNotFoundException: android.graphics.drawable.Icon
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at java.lang.Class.classForName(Native Method)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
12-10 23:46:56.812 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
12-10 23:46:56.822 18833-18840/com.tst.nikita.yandextranslater W/System.err:     at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
12-10 23:46:56.822 18833-18840/com.tst.nikita.yandextranslater W/System.err:        ... 26 more
12-10 23:46:56.822 18833-18840/com.tst.nikita.yandextranslater W/System.err:    Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available

我使用Android Studio 3.0.1。

设备 - 三星Galaxy S4 GT-I9505与Android 5.0.1。

从清单文件：

compileSdkVersion 26
buildToolsVersion '26.0.3'
minSdkVersion 21
targetSdkVersion 26

Answer 1

我注意到使用蓝牙时也会发生这种情况。当我关闭蓝牙以便我的代码停止扫描时我可以捕获视图层次结构就好了。