Error inflating class错误

09-13 16:24:00.996: ERROR/AndroidRuntime(929): FATAL EXCEPTION: main
09-13 16:24:00.996: ERROR/AndroidRuntime(929): android.view.InflateException: Binary XML file line #2: Error inflating class com.android.launcher2.AllApps2D$BackHomeZone
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at android.view.LayoutInflater.createView(LayoutInflater.java:503)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:565)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at android.view.LayoutInflater.inflate(LayoutInflater.java:385)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at com.android.launcher2.AllApps2D.onItemLongClick(AllApps2D.java:264)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at android.widget.AbsListView.performLongPress(AbsListView.java:1753)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at android.widget.AbsListView.access$600(AbsListView.java:72)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at android.widget.AbsListView$CheckForLongPress.run(AbsListView.java:1711)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at android.os.Handler.handleCallback(Handler.java:587)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at android.os.Handler.dispatchMessage(Handler.java:92)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at android.os.Looper.loop(Looper.java:123)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at android.app.ActivityThread.main(ActivityThread.java:4627)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at java.lang.reflect.Method.invokeNative(Native Method)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at java.lang.reflect.Method.invoke(Method.java:521)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at dalvik.system.NativeStart.main(Native Method)
09-13 16:24:00.996: ERROR/AndroidRuntime(929): Caused by: java.lang.NoSuchMethodException: BackHomeZone(Context,AttributeSet)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at java.lang.Class.getMatchingConstructor(Class.java:660)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at java.lang.Class.getConstructor(Class.java:477)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     at android.view.LayoutInflater.createView(LayoutInflater.java:475)
09-13 16:24:00.996: ERROR/AndroidRuntime(929):     ... 17 more

我遇到这种错误有过两种不同的原因：

1、没有定义inflate需要的默认构造函数；

2、这是个内部类，需要声明为static才能inflate；

关于自定义组件，还需要注意的一点是，如果时内部类，这个类就不能作为layout中的节点的名称，而必须用view作为节点名，然后加入一个class属性，值为该内部类的引用，比如launcher中又下面这样一个例子：