我不知道造成这个问题的原因，
问题：
android.content.res.Resources$NotFoundException: Resource ID #0x7f040028
R.java将此ResID报告为：
public static final int support_simple_spinner_dropdown_item=0x7f040028;
完整Stacktrace
06-14 17:29:32.685 9541-9541/com.cynetstudios.frequencyselector E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.cynetstudios.frequencyselector, PID: 9541
android.content.res.Resources$NotFoundException: Resource ID #0x7f040028
at android.content.res.Resources.getValue(Resources.java:1266)
at android.content.res.Resources.loadXmlResourceParser(Resources.java:2654)
at android.content.res.Resources.getLayout(Resources.java:1082)
at android.view.LayoutInflater.inflate(LayoutInflater.java:412)
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:371)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
at android.widget.AbsSpinner.onMeasure(AbsSpinner.java:197)
at android.widget.Spinner.onMeasure(Spinner.java:507)
at android.support.v7.widget.AppCompatSpinner.onMeasure(AppCompatSpinner.java:418)
at android.view.View.measure(View.java:17555)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:728)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:464)
at android.view.View.measure(View.java:17555)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
at android.view.View.measure(View.java:17555)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.support.v7.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:391)
at android.view.View.measure(View.java:17555)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.view.View.measure(View.java:17555)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17555)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2625)
at android.view.View.measure(View.java:17555)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2015)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1173)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1379)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5891)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5291)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699) at android.view.LayoutInflater.inflate(LayoutInflater.java:412)
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:371)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
at android.widget.AbsSpinner.onMeasure(AbsSpinner.java:197)
at android.widget.Spinner.onMeasure(Spinner.java:507)
at android.support.v7.widget.AppCompatSpinner.onMeasure(AppCompatSpinner.java:418)
at android.view.View.measure(View.java:17555)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:728)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:464)
at android.view.View.measure(View.java:17555)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
at android.view.View.measure(View.java:17555)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.support.v7.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:391)
at android.view.View.measure(View.java:17555)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.view.View.measure(View.java:17555)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17555)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2625)
at android.view.View.measure(View.java:17555)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2015)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1173)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1379)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5891)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5291)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
与此Spinner相关的唯一代码是：
//Initialise Frequency Drop Down Spinner
spinFreqSelector = (Spinner) findViewById(R.id.spinFreqSelector);
ArrayList<String> FreqList = new ArrayList<>(Arrays.asList("2.4/5Ghz", "2.4Ghz", "5Ghz"));
//R.layout.support_simple_spinner_dropdown_item is only a template
ArrayAdapter arrayAdapter = new ArrayAdapter(this, R.layout.support_simple_spinner_dropdown_item, FreqList);
spinFreqSelector.setAdapter(arrayAdapter);
protected void onCreate(Bundle savedInstanceState)完成时会发生此错误，
清洁和重建并不能解决这个问题。
解决方案？
答案 0 :(得分：1)
ArrayAdapter arrayAdapter = new ArrayAdapter(this, R.layout.support_simple_spinner_dropdown_item, FreqList);
尝试android.R.layout.simple_spinner_item或android.R.layout.support_simple_spinner_dropdown_item