Spinner 中奇怪的 NullPointerException [英] Weird NullPointerException in Spinner
问题描述
从 Android 4.4 KitKat 开始,我的应用程序发生了奇怪的崩溃.好像跟spinner有关系.我收到的这个错误堆栈跟踪:
Since Android 4.4 KitKat, i have weird crashes in my applications. It seems that it has something to do with spinner. This stacktrace of bug i am receiving:
java.lang.NullPointerException
at android.widget.TextView.makeNewLayout(TextView.java:6124)
at android.widget.TextView.onMeasure(TextView.java:6400)
at android.view.View.measure(View.java:16458)
at android.widget.Spinner.setUpChild(Spinner.java:632)
at android.widget.Spinner.makeView(Spinner.java:595)
at android.widget.Spinner.getBaseline(Spinner.java:431)
at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1089)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:590)
at android.view.View.measure(View.java:16458)
at com.android.internal.widget.ActionBarView.onMeasure(ActionBarView.java:1011)
at android.view.View.measure(View.java:16458)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.widget.ActionBarContainer.onMeasure(ActionBarContainer.java:271)
at android.view.View.measure(View.java:16458)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:254)
at android.view.View.measure(View.java:16458)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2289)
at android.view.View.measure(View.java:16458)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1914)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1111)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1293)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:998)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5582)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
at android.view.Choreographer.doCallbacks(Choreographer.java:562)
at android.view.Choreographer.doFrame(Choreographer.java:532)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4998)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
at dalvik.system.NativeStart.main(Native Method)
我在操作栏中有微调导航,我认为这与它有关.我正在使用 ABS.我有跟踪错误到我的微调阵列适配器的 getView 方法.这是我的 getView 方法:
I have spinner navigation in actionbar and i think that it has something to do with it. I am using ABS.I have track down error to getView method of my spinner array adapter. Here is my getView method:
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (LoginUtils.isLogged()) {
items[Properties.NAVIG_ITEM_MY_PROFILE] = LoginUtils.getTextForAdapter();
} else {
items[Properties.NAVIG_ITEM_MY_PROFILE] = context.getString(R.string.userProfile);
}
View view = convertView;
if (view == null) {
LayoutInflater vi = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = vi.inflate(R.layout.ab_spinner_item, null);
}
String text = items[position];
TextView menu = (TextView) view.findViewById(android.R.id.text1);
if (title == null) {
menu.setText(text);
} else {
menu.setText(title);
}
return view;
}
如果我评论这行:
//if (title == null) {
menu.setText(text);
// } else {
// menu.setText(title);
// }
问题消失.有人知道吗?
problem disappears. Does anyone have any idea?
推荐答案
正如 Peterdk 所描述的 这里 .你不需要删除
As Peterdk describe here . You dont need to remove
android:ellipsize="marquee"
android:ellipsize="marquee"
他建议使用:
inflater.inflate(android.R.layout.simple_spinner_item, null);//错误inflater.inflate(android.R.layout.simple_spinner_item,父母,false);//好
inflater.inflate(android.R.layout.simple_spinner_item, null);//WRONG inflater.inflate(android.R.layout.simple_spinner_item, parent, false);//GOOD
那解决了我的问题.我猜 Android 4.4 正试图严格控制膨胀布局
That fixed my issue. I guess Android 4.4 is trying to be strict about inflating layout
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