Android 中的NullPointerException

自从我开始瞄准安卓M以来，我在很多不同的机器上都看到了NPE.getHardwareLayer。这里有两个这样的错误：

Exception: java.lang.NullPointerException
 raw
android.view.View.getHardwareLayer (View.java:10178)
android.view.ViewGroup.drawChild (ViewGroup.java:2863)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.getDisplayList (View.java:10415)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
android.support.v4.widget.DrawerLayout.drawChild (DrawerLayout.java:1229)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.getDisplayList (View.java:10415)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
com.sothree.slidinguppanel.SlidingUpPanelLayout.drawChild (SlidingUpPanelLayout.java:888)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.draw (View.java:10981)
com.sothree.slidinguppanel.SlidingUpPanelLayout.draw (SlidingUpPanelLayout.java:941)
android.view.View.getDisplayList (View.java:10417)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.draw (View.java:10981)
android.widget.FrameLayout.draw (FrameLayout.java:450)
android.view.View.getDisplayList (View.java:10417)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.getDisplayList (View.java:10415)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.getDisplayList (View.java:10415)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.getDisplayList (View.java:10415)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.getDisplayList (View.java:10415)
android.view.ViewGroup.drawChild (ViewGroup.java:2850)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.draw (View.java:10981)
android.widget.FrameLayout.draw (FrameLayout.java:450)
com.android.internal.policy.impl.PhoneWindow$DecorView.draw (PhoneWindow.java:2126)
android.view.View.getDisplayList (View.java:10417)
android.view.HardwareRenderer$GlRenderer.draw (HardwareRenderer.java:899)
android.view.ViewRootImpl.draw (ViewRootImpl.java:1910)
android.view.ViewRootImpl.performTraversals (ViewRootImpl.java:1634)
android.view.ViewRootImpl.handleMessage (ViewRootImpl.java:2442)
android.os.Handler.dispatchMessage (Handler.java:99)
android.os.Looper.loop (Looper.java:137)
android.app.ActivityThread.main (ActivityThread.java:4456)
java.lang.reflect.Method.invokeNative (Method.java)
dalvik.system.NativeStart.main (NativeStart.java)

还有一个：

Fatal Exception: java.lang.NullPointerException
 raw
android.view.View.getHardwareLayer (View.java:10178)
android.view.ViewGroup.drawChild (ViewGroup.java:2863)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:2489)
android.view.View.getDisplayList (View.java:10415)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:2597)
android.view.View.getDisplayList (View.java:10380)
android.view.HardwareRenderer$GlRenderer.draw (HardwareRenderer.java:899)
android.view.ViewRootImpl.draw (ViewRootImpl.java:1910)
android.view.ViewRootImpl.performTraversals (ViewRootImpl.java:1634)
android.view.ViewRootImpl.handleMessage (ViewRootImpl.java:2442)
android.os.Handler.dispatchMessage (Handler.java:99)
android.os.Looper.loop (Looper.java:137)
android.app.ActivityThread.main (ActivityThread.java:4456)
java.lang.reflect.Method.invokeNative (Method.java)
dalvik.system.NativeStart.main (NativeStart.java)

---

为了消除这些异常，我应该知道M中有什么变化吗？

好的，这似乎是一个支持库错误。作为：

通过限制 Android 4.1（API级别16）及更高版本的硬件层。（）

---

谢谢你，傻瓜

好的，这似乎是一个支持库错误。作为：

通过限制 Android 4.1（API级别16）及更高版本的硬件层。（）

---

谢谢你，傻瓜

我们没有看到任何代码我们该如何帮助你？哦，你看到了。对于这两个例外，代码都是“dalvik.system.NativeStart.main（NativeStart.java）”。但是java代码在哪里？是的，40个片段，3个活动，23个适配器，所有这些都膨胀了它们自己的视图！如果你能从上面的异常中猜出哪段代码是违规者，我可以发布它。如果它在

NativeStart.java

上崩溃，当你点击它时，你会看到崩溃的通道，你应该发布你的

NativeStart.java类

我们没有看到任何代码，我们该如何帮助你？哦，你看到了。对于这两个例外，代码都是“dalvik.system.NativeStart.main（NativeStart.java）”。但是java代码在哪里？是的，40个片段，3个活动，23个适配器，所有这些都膨胀了它们自己的视图！如果你能从上面的异常中猜出哪段代码是违规者，我可以发布它。如果它在

NativeStart.java

上崩溃，当你点击它时，你会看到崩溃的通道，你应该发布你的

NativeStart.java类