Android:尝试调用 Preferences.java 时强制关闭
一直尝试使用以下方法调用 Preferences.java 类:
Intent settingsActivity = new Intent(getBaseContext(), Preferences.class);
startActivity(settingsActivity);
我的 Manifest.xml 中有这个(在主应用程序类活动之外):
<application>
........
<activity android:name=".Preferences" android:label="Preferences">
</activity>
</application>
并且我仍然强制关闭“android.content.ActivityNotFound...”:
E/AndroidRuntime(25644): FATAL EXCEPTION: main
E/AndroidRuntime(25644): android.content.ActivityNotFoundException: Unable to fi
nd explicit activity class {com./java.util.prefs.Preferences};
have you declared this activity in your AndroidManifest.xml?
E/AndroidRuntime(25644): at android.app.Instrumentation.checkStartActivit
yResult(Instrumentation.java:1404)
E/AndroidRuntime(25644): at android.app.Instrumentation.execStartActivity
(Instrumentation.java:1378)
E/AndroidRuntime(25644): at android.app.Activity.startActivityForResult(A
ctivity.java:2817)
E/AndroidRuntime(25644): at android.app.Activity.startActivity(Activity.j
ava:2923)
E/AndroidRuntime(25644): at com.droidil.droidmarks.Dmarks.onOptionsItemSe
lected(Dmarks.java:337)
E/AndroidRuntime(25644): at android.app.Activity.onMenuItemSelected(Activ
ity.java:2195)
E/AndroidRuntime(25644): at com.android.internal.policy.impl.PhoneWindow.
onMenuItemSelected(PhoneWindow.java:730)
E/AndroidRuntime(25644): at com.android.internal.view.menu.MenuItemImpl.i
nvoke(MenuItemImpl.java:143)
E/AndroidRuntime(25644): at com.android.internal.view.menu.MenuBuilder.pe
rformItemAction(MenuBuilder.java:855)
E/AndroidRuntime(25644): at com.android.internal.view.menu.IconMenuView.i
nvokeItem(IconMenuView.java:532)
E/AndroidRuntime(25644): at com.android.internal.view.menu.IconMenuItemVi
ew.performClick(IconMenuItemView.java:122)
E/AndroidRuntime(25644): at android.view.View$PerformClick.run(View.java:
8818)
E/AndroidRuntime(25644): at android.os.Handler.handleCallback(Handler.jav
a:587)
E/AndroidRuntime(25644): at android.os.Handler.dispatchMessage(Handler.ja
va:92)
E/AndroidRuntime(25644): at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime(25644): at android.app.ActivityThread.main(ActivityThrea
d.java:4627)
E/AndroidRuntime(25644): at java.lang.reflect.Method.invokeNative(Native
Method)
E/AndroidRuntime(25644): at java.lang.reflect.Method.invoke(Method.java:5
21)
E/AndroidRuntime(25644): at com.android.internal.os.ZygoteInit$MethodAndA
rgsCaller.run(ZygoteInit.java:868)
E/AndroidRuntime(25644): at com.android.internal.os.ZygoteInit.main(Zygot
eInit.java:626)
E/AndroidRuntime(25644): at dalvik.system.NativeStart.main(Native Method)
没有编译错误..只是这个运行时错误... 有什么想法为什么它强制关闭,即使我在 Manifest.xml 中定义了 Activity?
感谢任何帮助!
Been trying to call Preferences.java class using:
Intent settingsActivity = new Intent(getBaseContext(), Preferences.class);
startActivity(settingsActivity);
I have this in my Manifest.xml (outside the main app class activity):
<application>
........
<activity android:name=".Preferences" android:label="Preferences">
</activity>
</application>
And I still get force close for "android.content.ActivityNotFound..." :
E/AndroidRuntime(25644): FATAL EXCEPTION: main
E/AndroidRuntime(25644): android.content.ActivityNotFoundException: Unable to fi
nd explicit activity class {com./java.util.prefs.Preferences};
have you declared this activity in your AndroidManifest.xml?
E/AndroidRuntime(25644): at android.app.Instrumentation.checkStartActivit
yResult(Instrumentation.java:1404)
E/AndroidRuntime(25644): at android.app.Instrumentation.execStartActivity
(Instrumentation.java:1378)
E/AndroidRuntime(25644): at android.app.Activity.startActivityForResult(A
ctivity.java:2817)
E/AndroidRuntime(25644): at android.app.Activity.startActivity(Activity.j
ava:2923)
E/AndroidRuntime(25644): at com.droidil.droidmarks.Dmarks.onOptionsItemSe
lected(Dmarks.java:337)
E/AndroidRuntime(25644): at android.app.Activity.onMenuItemSelected(Activ
ity.java:2195)
E/AndroidRuntime(25644): at com.android.internal.policy.impl.PhoneWindow.
onMenuItemSelected(PhoneWindow.java:730)
E/AndroidRuntime(25644): at com.android.internal.view.menu.MenuItemImpl.i
nvoke(MenuItemImpl.java:143)
E/AndroidRuntime(25644): at com.android.internal.view.menu.MenuBuilder.pe
rformItemAction(MenuBuilder.java:855)
E/AndroidRuntime(25644): at com.android.internal.view.menu.IconMenuView.i
nvokeItem(IconMenuView.java:532)
E/AndroidRuntime(25644): at com.android.internal.view.menu.IconMenuItemVi
ew.performClick(IconMenuItemView.java:122)
E/AndroidRuntime(25644): at android.view.View$PerformClick.run(View.java:
8818)
E/AndroidRuntime(25644): at android.os.Handler.handleCallback(Handler.jav
a:587)
E/AndroidRuntime(25644): at android.os.Handler.dispatchMessage(Handler.ja
va:92)
E/AndroidRuntime(25644): at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime(25644): at android.app.ActivityThread.main(ActivityThrea
d.java:4627)
E/AndroidRuntime(25644): at java.lang.reflect.Method.invokeNative(Native
Method)
E/AndroidRuntime(25644): at java.lang.reflect.Method.invoke(Method.java:5
21)
E/AndroidRuntime(25644): at com.android.internal.os.ZygoteInit$MethodAndA
rgsCaller.run(ZygoteInit.java:868)
E/AndroidRuntime(25644): at com.android.internal.os.ZygoteInit.main(Zygot
eInit.java:626)
E/AndroidRuntime(25644): at dalvik.system.NativeStart.main(Native Method)
No Compiling errors... just this Runtime error...
Any ideas why it's force closing even though I have the Activity defined in the Manifest.xml?
Appreciate any help!
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看来您混淆了导入声明。查看有关“java.util.prefs.Preferences”的第二行。更改您的导入或完全限定您对偏好活动的引用。
It looks like you have an import statement mix-up. Look at the 2nd line about "java.util.prefs.Preferences". Either change your imports or fully qualify your reference to your Preference activity.
同样的问题...我不小心将“java.utils.prefs.Preferences”导入到我的 Main 类中,并将其导入到我的 Preferences 类中。
Same problem...I accidentally imported the "java.utils.prefs.Preferences" into my Main class and I had it imported into my Preferences class.