閉じる

java.lang.NullPointerException @ android.widget.TextView.makeNewLayout

Androidが 4.3から 4.4(KRT16S)になってから Spinnerを使っているアプリが落ちるようになった。
スタックトレースは以下の通り…って、この内容からわかるのは「Spinner関係のどこかで落ちたっぽい」ぐらいだよ…_no

11-23 14:04:36.232: E/AndroidRuntime(6389): java.lang.NullPointerException
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.TextView.makeNewLayout(TextView.java:6124)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.TextView.onMeasure(TextView.java:6400)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.View.measure(View.java:16458)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.Spinner.setUpChild(Spinner.java:632)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.Spinner.makeView(Spinner.java:595)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.Spinner.getBaseline(Spinner.java:431)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1262)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.LinearLayout.onMeasure(LinearLayout.java:590)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.View.measure(View.java:16458)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.View.measure(View.java:16458)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.View.measure(View.java:16458)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.View.measure(View.java:16458)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.View.measure(View.java:16458)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.LinearLayout.measureVertical(LinearLayout.java:847)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.View.measure(View.java:16458)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.View.measure(View.java:16458)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.View.measure(View.java:16458)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.View.measure(View.java:16458)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
11-23 14:04:36.232: E/AndroidRuntime(6389): at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:327)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.View.measure(View.java:16458)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
11-23 14:04:36.232: E/AndroidRuntime(6389): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2289)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.View.measure(View.java:16458)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1914)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1111)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1293)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:998)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5582)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.Choreographer.doCallbacks(Choreographer.java:562)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.Choreographer.doFrame(Choreographer.java:532)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.os.Handler.handleCallback(Handler.java:733)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.os.Handler.dispatchMessage(Handler.java:95)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.os.Looper.loop(Looper.java:137)
11-23 14:04:36.232: E/AndroidRuntime(6389): at android.app.ActivityThread.main(ActivityThread.java:4998)
11-23 14:04:36.232: E/AndroidRuntime(6389): at java.lang.reflect.Method.invokeNative(Native Method)
11-23 14:04:36.232: E/AndroidRuntime(6389): at java.lang.reflect.Method.invoke(Method.java:515)
11-23 14:04:36.232: E/AndroidRuntime(6389): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
11-23 14:04:36.232: E/AndroidRuntime(6389): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
11-23 14:04:36.232: E/AndroidRuntime(6389): at dalvik.system.NativeStart.main(Native Method)

検索してみると、stackoverflowに同じ内容であろう投稿を見つけた。<Android app crashes with NullPointerException in ChoreoGrapher
回答の一つに「android.R.layout.simple_spinner_itemをインフレートするコードを変更してみろ」とある。

inflater.inflate(android.R.layout.simple_spinner_item, null);//WRONG
inflater.inflate(android.R.layout.simple_spinner_item, parent, false);//GOOD

うちの環境ではこの変更でうまくいった。
ちなみに前者のメソッドは最終的に (…,root,root!=null)という形で後者のメソッドを呼び出す。

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