我有一个屏幕首选项，因此使用了 PreferenceActivity，我已经构建了所有内容并正常运行，但是通过单击文本 SwitchPreference （即行上的任何位置而不位于同一开关中），他可以使用手机（版本 4.1.2）因空指针异常而爆发，但如果您单击同一个开关则工作正常。
这可能是什么？
error:
E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.NullPointerException
at android.widget.Switch.onPopulateAccessibilityEvent(Switch.java:550)
at android.view.View.dispatchPopulateAccessibilityEventInternal(View.java:4621)
at android.view.View.dispatchPopulateAccessibilityEvent(View.java:4611)
at android.preference.TwoStatePreference.sendAccessibilityEvent(TwoStatePreference.java:197)
at android.preference.SwitchPreference.onBindView(SwitchPreference.java:114)
at android.preference.Preference.getView(Preference.java:463)
at android.preference.PreferenceGroupAdapter.getView(PreferenceGroupAdapter.java:221)
at android.widget.AbsListView.obtainView(AbsListView.java:2308)
at android.widget.ListView.makeAndAddView(ListView.java:1769)
at android.widget.ListView.fillDown(ListView.java:672)
at android.widget.ListView.fillSpecific(ListView.java:1330)
at android.widget.ListView.layoutChildren(ListView.java:1600)
at android.widget.AbsListView.onLayout(AbsListView.java:2143)
at android.view.View.layout(View.java:13850)
at android.view.ViewGroup.layout(ViewGroup.java:4364)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1680)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1538)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1451)
at android.view.View.layout(View.java:13850)
at android.view.ViewGroup.layout(ViewGroup.java:4364)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1680)
at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1669)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1453)
at android.view.View.layout(View.java:13850)
at android.view.ViewGroup.layout(ViewGroup.java:4364)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1680)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1538)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1451)
at android.view.View.layout(View.java:13850)
at android.view.ViewGroup.layout(ViewGroup.java:4364)
at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
at android.view.View.layout(View.java:13850)
at android.view.ViewGroup.layout(ViewGroup.java:4364)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1680)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1538)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1451)
at android.view.View.layout(View.java:13850)
at android.view.ViewGroup.layout(ViewGroup.java:4364)
at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
at android.view.View.layout(View.java:13850)
at android.view.ViewGroup.layout(ViewGroup.java:4364)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1894)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1710)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1013)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4245)
at android.view.Choreographer$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$FrameDisplayEventReceiver.run(Choreographer.java:711)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:153)
at android.app.ActivityThread.main(ActivityThread.java:5071)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
at dalvik.system.NativeStart.main(Native Method)
将其添加到您的自定义 switchPrefences 组件中
@Override
protected void onClick() {
// Log.e("CustomSwitchPreferences", "onClick called");
}
将其留空并且不要调用 super.onClick();
这将使您的 onPreferenceChange 除了点击之外（切换操作不会受到影响，只会影响行上的点击）
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