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根据wifi状态,我喜欢将其设置为“开”或“关”,以便在我的操作栏(或活动页面中的任意位置)上有开关。
如果手机的wifi开着,我想将开关设置为开,如果它关闭,则关闭。加载活动时根据条件将开关设置为关闭
我尝试将代码放置在onCreate,onStart - 但它导致应用程序崩溃。
switchWifiToggle.setChecked(Wifi.Enabled());
我是新的android/java,否则我会分享堆栈跟踪。
关于logcat有吨和吨的信息,所以我不确定在这里共享什么(我是一个.NET人)。
注册到BroadcastReceiver将无济于事,因为我希望切换设置为正确的状态,而应用程序正在加载(或完成加载)。
这里的图像使用交换机作为主交换机 - 我要将此开关的状态,一旦应用程序被加载的地方,类似的onCreate或在onStart或...
谢谢
更新:堆栈跟踪添加
02-06 09:15:39.943 632-1066/? E/LocSvc_IzatApiV02﹕ W/virtual int izat_core::IzatApiV02::injectLocation(GpsExtLocation):665]: error! inject position failed
02-06 09:15:39.963 632-1066/? E/LocSvc_ApiV02﹕ W/virtual loc_api_adapter_err LocApiV02::injectPosition(double, double, float):492]: error! status = eLOC_CLIENT_FAILURE_INVALID_PARAMETER, inject_pos_ind.status = UNKNOWN
02-06 09:15:40.063 16882-16882/com.learn.wifitwo E/WiFiMainActivity﹕ +++ ON CREATE +++
02-06 09:15:40.113 16882-16882/com.learn.wifitwo E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.learn.wifitwo, PID: 16882
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.learn.wifitwo/com.learn.wifitwo.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean com.learn.wifitwo.WiFi.IsEnabled()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean com.learn.wifitwo.WiFi.IsEnabled()' on a null object reference
at com.learn.wifitwo.MainActivity.onCreate(MainActivity.java:99)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
发表更多代码。 – Blackbelt
...和LogCat错误堆栈跟踪。基本上,红色的东西;) – 2Dee
让我们说,如果我必须在.NET中这样做,我会有 1)在Form类中,订阅FormLoad事件 2),并在该FormLoad事件中,我会检查参数然后设置swtich的属性。 – Musa