去除onCreateOptionsMenu结果NullPointerException异常 [英] removing onCreateOptionsMenu results to NullPointerException
问题描述
我发现,当我preSS我的设备上的菜单按钮,它给了我一个NullPointerException异常。
公共布尔onCreateOptionsMenu(菜单菜单){
。getMenuInflater()膨胀(R.menu.main,菜单); //空指针这里
返回true;
}
所以我所做的就是通过去除第二线以上和更改返回类型为false完全禁用菜单。然而,它仍然给我一个NullPointerException异常。这里是堆栈:
3月11日至25日:50:20.931 1212年至1212年/ com.sblive.aufschoolbliz E / InputEventSender:异常调度完成信号。
3月11日至25日:50:20.931 1212年至1212年/ com.sblive.aufschoolbliz E /的MessageQueue-JNI:在异常回调的MessageQueue:handleReceiveCallback
3月11日至25日:50:21.040 1212年至1212年/ com.sblive.aufschoolbliz E /的MessageQueue-JNI:显示java.lang.NullPointerException
在android.support.v7.app.ActionBarImplICS.getThemedContext(ActionBarImplICS.java:274)
在android.support.v7.app.ActionBarActivityDelegate.getMenuInflater(ActionBarActivityDelegate.java:89)
在android.support.v7.app.ActionBarActivity.getMenuInflater(ActionBarActivity.java:71)
在android.app.Activity.onCreatePanelMenu(Activity.java:2505)
在android.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:224)
在android.support.v7.app.ActionBarActivity.superOnCreatePanelMenu(ActionBarActivity.java:224)
在android.support.v7.app.ActionBarActivityDelegateICS.onCreatePanelMenu(ActionBarActivityDelegateICS.java:141)
在android.support.v7.app.ActionBarActivity.onCreatePanelMenu(ActionBarActivity.java:199)
在android.support.v7.app.ActionBarActivityDelegateICS$WindowCallbackWrapper.onCreatePanelMenu(ActionBarActivityDelegateICS.java:280)
在com.android.internal.policy.impl.PhoneWindow。preparePanel(PhoneWindow.java:413)
在com.android.internal.policy.impl.PhoneWindow.onKeyDownPanel(PhoneWindow.java:795)
在com.android.internal.policy.impl.PhoneWindow.onKeyDown(PhoneWindow.java:1471)
在com.android.internal.policy.impl.PhoneWindow $ DecorView.dispatchKeyEvent(PhoneWindow.java:1867)
在android.view.ViewRootImpl $ ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:3791)
在android.view.ViewRootImpl $ ViewPostImeInputStage.onProcess(ViewRootImpl.java:3774)
在android.view.ViewRootImpl $ InputStage.deliver(ViewRootImpl.java:3379)
在android.view.ViewRootImpl $ InputStage.onDeliverToNext(ViewRootImpl.java:3429)
在android.view.ViewRootImpl $ InputStage.forward(ViewRootImpl.java:3398)
在android.view.ViewRootImpl $ AsyncInputStage.forward(ViewRootImpl.java:3483)
在android.view.ViewRootImpl $ InputStage.apply(ViewRootImpl.java:3406)
在android.view.ViewRootImpl $ AsyncInputStage.apply(ViewRootImpl.java:3540)
在android.view.ViewRootImpl $ InputStage.deliver(ViewRootImpl.java:3379)
在android.view.ViewRootImpl $ InputStage.onDeliverToNext(ViewRootImpl.java:3429)
在android.view.ViewRootImpl $ InputStage.forward(ViewRootImpl.java:3398)
在android.view.ViewRootImpl $ InputStage.apply(ViewRootImpl.java:3406)
在android.view.ViewRootImpl $ InputStage.deliver(ViewRootImpl.java:3379)
在android.view.ViewRootImpl $ InputStage.onDeliverToNext(ViewRootImpl.java:3429)
在android.view.ViewRootImpl $ InputStage.forward(ViewRootImpl.java:3398)
在android.view.ViewRootImpl $ AsyncInputStage.forward(ViewRootImpl.java:3516)
在android.view.ViewRootImpl $ ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:3666)
在android.view.inputmethod.InputMethodManager $ PendingEvent.run(InputMethodManager.java:1982)
在android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:1698)
在android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:1689)
在android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:1959)
在android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141)
在android.os.MessageQueue.nativePollOnce(本机方法)
在android.os.MessageQueue.next(MessageQueue.java:132)
在android.os.Looper.loop(Looper.java:124)
在android.app.ActivityThread.main(ActivityThread.java:5103)
在java.lang.reflect.Method.invokeNative(本机方法)
在java.lang.reflect.Method.invoke(Method.java:525)
在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:737)
在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
在dalvik.system.NativeStart.main(本机方法)3月11日至25日:50:21.040 1212年至1212年/ com.sblive.aufschoolbliz D / AndroidRuntime:关闭VM
3月11日至25日:50:21.040 1212年至1212年/ com.sblive.aufschoolbliz W / dalvikvm:主题ID = 1:螺纹未捕获的异常(组= 0x41465700)退出
3月11日至25日:50:21.150 1212年至1212年/ com.sblive.aufschoolbliz E / AndroidRuntime:致命异常:主要
显示java.lang.NullPointerException
在android.support.v7.app.ActionBarImplICS.getThemedContext(ActionBarImplICS.java:274)
在android.support.v7.app.ActionBarActivityDelegate.getMenuInflater(ActionBarActivityDelegate.java:89)
在android.support.v7.app.ActionBarActivity.getMenuInflater(ActionBarActivity.java:71)
在android.app.Activity.onCreatePanelMenu(Activity.java:2505)
在android.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:224)
在android.support.v7.app.ActionBarActivity.superOnCreatePanelMenu(ActionBarActivity.java:224)
在android.support.v7.app.ActionBarActivityDelegateICS.onCreatePanelMenu(ActionBarActivityDelegateICS.java:141)
在android.support.v7.app.ActionBarActivity.onCreatePanelMenu(ActionBarActivity.java:199)
在android.support.v7.app.ActionBarActivityDelegateICS$WindowCallbackWrapper.onCreatePanelMenu(ActionBarActivityDelegateICS.java:280)
在com.android.internal.policy.impl.PhoneWindow。preparePanel(PhoneWindow.java:413)
在com.android.internal.policy.impl.PhoneWindow.onKeyDownPanel(PhoneWindow.java:795)
在com.android.internal.policy.impl.PhoneWindow.onKeyDown(PhoneWindow.java:1471)
在com.android.internal.policy.impl.PhoneWindow $ DecorView.dispatchKeyEvent(PhoneWindow.java:1867)
在android.view.ViewRootImpl $ ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:3791)
在android.view.ViewRootImpl $ ViewPostImeInputStage.onProcess(ViewRootImpl.java:3774)
在android.view.ViewRootImpl $ InputStage.deliver(ViewRootImpl.java:3379)
在android.view.ViewRootImpl $ InputStage.onDeliverToNext(ViewRootImpl.java:3429)
在android.view.ViewRootImpl $ InputStage.forward(ViewRootImpl.java:3398)
在android.view.ViewRootImpl $ AsyncInputStage.forward(ViewRootImpl.java:3483)
在android.view.ViewRootImpl $ InputStage.apply(ViewRootImpl.java:3406)
在android.view.ViewRootImpl $ AsyncInputStage.apply(ViewRootImpl.java:3540)
在android.view.ViewRootImpl $ InputStage.deliver(ViewRootImpl.java:3379)
在android.view.ViewRootImpl $ InputStage.onDeliverToNext(ViewRootImpl.java:3429)
在android.view.ViewRootImpl $ InputStage.forward(ViewRootImpl.java:3398)
在android.view.ViewRootImpl $ InputStage.apply(ViewRootImpl.java:3406)
在android.view.ViewRootImpl $ InputStage.deliver(ViewRootImpl.java:3379)
在android.view.ViewRootImpl $ InputStage.onDeliverToNext(ViewRootImpl.java:3429)
在android.view.ViewRootImpl $ InputStage.forward(ViewRootImpl.java:3398)
在android.view.ViewRootImpl $ AsyncInputStage.forward(ViewRootImpl.java:3516)
在android.view.ViewRootImpl $ ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:3666)
在android.view.inputmethod.InputMethodManager $ PendingEvent.run(InputMethodManager.java:1982)
在android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:1698)
在android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:1689)
在android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:1959)
在android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141)
在android.os.MessageQueue.nativePollOnce(本机方法)
在android.os.MessageQueue.next(MessageQueue.java:132)
在android.os.Looper.loop(Looper.java:124)
在android.app.ActivityThread.main(ActivityThread.java:5103)
在java.lang.reflect.Method.invokeNative(本机方法)
在java.lang.reflect.Method.invoke(Method.java:525)
在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:737)
在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
在dalvik.system.NativeStart.main(本机方法)
您的堆栈跟踪显示实际的NPE在 ActionBarImplICS.java
:
@覆盖
公共语境getThemedContext(){
返回mActionBar.getThemedContext(); // 这里
}
有可能是一个几个原因你的动作条为null。
- 你是不是调用的onCreate的setContentView()()?
- 是否缺少至少
安卓的minSdkVersion =11
在清单 ? - 您使用像一个主题
的android:主题=@风格/ Theme.NoTitle
- 您使用自定义样式像
的android:windowIsFloating
,的android:backgroundDimEnabled
或的android :?windowNoTitle
修改:如果没有标题/动作条,解决这个问题最好的办法似乎是通过覆盖菜单键preSS 。
I found out that when I press the menu button on my device, it gives me a NullPointerException.
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu); //NullPointer Here
return true;
}
So what I did is to completely disable the menu by removing the second line above and changing the return type to false. However, it is still giving me a NullPointerException. Here is the stack:
11-25 03:50:20.931 1212-1212/com.sblive.aufschoolbliz E/InputEventSender﹕ Exception dispatching finished signal.
11-25 03:50:20.931 1212-1212/com.sblive.aufschoolbliz E/MessageQueue-JNI﹕ Exception in MessageQueue callback: handleReceiveCallback
11-25 03:50:21.040 1212-1212/com.sblive.aufschoolbliz E/MessageQueue-JNI﹕ java.lang.NullPointerException
at android.support.v7.app.ActionBarImplICS.getThemedContext(ActionBarImplICS.java:274)
at android.support.v7.app.ActionBarActivityDelegate.getMenuInflater(ActionBarActivityDelegate.java:89)
at android.support.v7.app.ActionBarActivity.getMenuInflater(ActionBarActivity.java:71)
at android.app.Activity.onCreatePanelMenu(Activity.java:2505)
at android.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:224)
at android.support.v7.app.ActionBarActivity.superOnCreatePanelMenu(ActionBarActivity.java:224)
at android.support.v7.app.ActionBarActivityDelegateICS.onCreatePanelMenu(ActionBarActivityDelegateICS.java:141)
at android.support.v7.app.ActionBarActivity.onCreatePanelMenu(ActionBarActivity.java:199)
at android.support.v7.app.ActionBarActivityDelegateICS$WindowCallbackWrapper.onCreatePanelMenu(ActionBarActivityDelegateICS.java:280)
at com.android.internal.policy.impl.PhoneWindow.preparePanel(PhoneWindow.java:413)
at com.android.internal.policy.impl.PhoneWindow.onKeyDownPanel(PhoneWindow.java:795)
at com.android.internal.policy.impl.PhoneWindow.onKeyDown(PhoneWindow.java:1471)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1867)
at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:3791)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3774)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3483)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3540)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3516)
at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:3666)
at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:1982)
at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:1698)
at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:1689)
at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:1959)
at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:132)
at android.os.Looper.loop(Looper.java:124)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
11-25 03:50:21.040 1212-1212/com.sblive.aufschoolbliz D/AndroidRuntime﹕ Shutting down VM
11-25 03:50:21.040 1212-1212/com.sblive.aufschoolbliz W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x41465700)
11-25 03:50:21.150 1212-1212/com.sblive.aufschoolbliz E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.NullPointerException
at android.support.v7.app.ActionBarImplICS.getThemedContext(ActionBarImplICS.java:274)
at android.support.v7.app.ActionBarActivityDelegate.getMenuInflater(ActionBarActivityDelegate.java:89)
at android.support.v7.app.ActionBarActivity.getMenuInflater(ActionBarActivity.java:71)
at android.app.Activity.onCreatePanelMenu(Activity.java:2505)
at android.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:224)
at android.support.v7.app.ActionBarActivity.superOnCreatePanelMenu(ActionBarActivity.java:224)
at android.support.v7.app.ActionBarActivityDelegateICS.onCreatePanelMenu(ActionBarActivityDelegateICS.java:141)
at android.support.v7.app.ActionBarActivity.onCreatePanelMenu(ActionBarActivity.java:199)
at android.support.v7.app.ActionBarActivityDelegateICS$WindowCallbackWrapper.onCreatePanelMenu(ActionBarActivityDelegateICS.java:280)
at com.android.internal.policy.impl.PhoneWindow.preparePanel(PhoneWindow.java:413)
at com.android.internal.policy.impl.PhoneWindow.onKeyDownPanel(PhoneWindow.java:795)
at com.android.internal.policy.impl.PhoneWindow.onKeyDown(PhoneWindow.java:1471)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1867)
at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:3791)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3774)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3483)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3540)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3516)
at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:3666)
at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:1982)
at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:1698)
at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:1689)
at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:1959)
at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:132)
at android.os.Looper.loop(Looper.java:124)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Your stack trace shows that the actual NPE is in ActionBarImplICS.java
:
@Override
public Context getThemedContext() {
return mActionBar.getThemedContext(); // here
}
There can be a few reasons why your action bar is null.
- Are you not calling setContentView() in onCreate()?
- Are you missing at least
android:minSdkVersion="11"
in your manifest? - Are you using a theme like
android:theme="@style/Theme.NoTitle"
? - Are you using custom styles like
android:windowIsFloating
,android:backgroundDimEnabled
orandroid:windowNoTitle
?
EDIT: In case there is no title / actionbar, the best way to fix this seems to be by overriding the menu key press.
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