我有一个带有 2 个选项卡式活动的应用程序,我正在尝试使用以下代码在第二个选项卡上获取 SharedPreferences:SharedPreferences prefs = this.getSharedPreferences("com.some.app", Context.MODE_PRIVATE);
但它使应用程序强制关闭,我在第一个活动上使用相同的代码,它就可以了SharedPreferences
!任何想法是什么导致了这个?
日志猫:
06-19 17:10:37.690: W/dalvikvm(6589): threadid=1: thread exiting with uncaught exception (group=0x40a031f8)
06-19 17:10:37.706: E/AndroidRuntime(6589): FATAL EXCEPTION: main
06-19 17:10:37.706: E/AndroidRuntime(6589): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.something.some/com.something.somehow}: java.lang.NullPointerException
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.app.ActivityThread.startActivityNow(ActivityThread.java:1797)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:682)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.widget.TabHost.setCurrentTab(TabHost.java:346)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:150)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:540)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.view.View.performClick(View.java:3511)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.view.View$PerformClick.run(View.java:14105)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.os.Handler.handleCallback(Handler.java:605)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.os.Handler.dispatchMessage(Handler.java:92)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.os.Looper.loop(Looper.java:137)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.app.ActivityThread.main(ActivityThread.java:4424)
06-19 17:10:37.706: E/AndroidRuntime(6589): at java.lang.reflect.Method.invokeNative(Native Method)
06-19 17:10:37.706: E/AndroidRuntime(6589): at java.lang.reflect.Method.invoke(Method.java:511)
06-19 17:10:37.706: E/AndroidRuntime(6589): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787)
06-19 17:10:37.706: E/AndroidRuntime(6589): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554)
06-19 17:10:37.706: E/AndroidRuntime(6589): at dalvik.system.NativeStart.main(Native Method)
06-19 17:10:37.706: E/AndroidRuntime(6589): Caused by: java.lang.NullPointerException
06-19 17:10:37.706: E/AndroidRuntime(6589): at com.someone.someapp.Statify.onCreate(Statify.java:59)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.app.Activity.performCreate(Activity.java:4465)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
06-19 17:10:37.706: E/AndroidRuntime(6589): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
06-19 17:10:37.706: E/AndroidRuntime(6589): ... 18 more