带有 ArrayMap 的 Android 4.1 崩溃

Question

我在使用这个 logcat 的代码中出现错误：

java.lang.NoClassDefFoundError: android.util.ArrayMap
at it.dd.multiplayerit.MainActivity.<init>(MainActivity.java:88)
at it.dd.multiplayerit.SwipeMainFragment$SectionsPagerAdapter.getItem(SwipeMainFragment.java:200)
at android.support.v4.app.FragmentPagerAdapter.instantiateItem(FragmentPagerAdapter.java:97)
at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:832)
at android.support.v4.view.ViewPager.populate(ViewPager.java:982)
at android.support.v4.view.ViewPager.populate(ViewPager.java:914)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1436)
at android.view.View.measure(View.java:15284)
at com.jeremyfeinstein.slidingmenu.lib.CustomViewAbove.onMeasure(CustomViewAbove.java:456)
at android.view.View.measure(View.java:15284)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:665)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:447)
at android.view.View.measure(View.java:15284)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4816)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:15284)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:861)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:602)
at android.view.View.measure(View.java:15284)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4816)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2367)
at android.view.View.measure(View.java:15284)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1867)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1111)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1292)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1009)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4236)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
at android.view.Choreographer.doCallbacks(Choreographer.java:555)
at android.view.Choreographer.doFrame(Choreographer.java:525)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4872)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
at dalvik.system.NativeStart.main(Native Method)

我认为问题在于我创建的自动完成文本视图。当我在键入我想要搜索的内容时单击下拉列表时，我映射了数组以获取数组的位置。

在第 88 行我有这个：

ArrayMap<String, Integer>myArrayMap = new ArrayMap<String, Integer>();

崩溃似乎仅限于 android 4.1 版本。有什么不兼容的地方吗？

Answer 1

ArrayMap 是在 Api 级别 19 中引入的，但它也在兼容库 v4 中发布，因此将导入更改为 android.support.v4.util.ArrayMap 而不是 android.util.ArrayMap 就足够了

Answer 2

现在它迁移到 AndroidX。 而不是android.util.ArrayMap，你将写androidx.collection.ArrayMap