使用EthernetManager时出错,请大神帮忙看一下。
因为android.jar里没有EthernetManager,因此下载源码编译出classes.jar(这里有EthernetManager)。
把classes.jar导入工程后,写了下面一段代码:
第一行: EthernetManager mEthManager = (EthernetManager) this.getSystemService(Context.ETHERNET_SERVICE);
第二行: int state = mEthManager.getState();
结果在第二行处抛如下的异常,请大家帮忙瞧瞧,是什么原因引起的,谢谢!
01-20 01:37:43.213: E/AndroidRuntime(3677): java.lang.NoSuchMethodError: Landroid/net/ethernet/EthernetManager;.getState
01-20 01:37:43.213: E/AndroidRuntime(3677): at com.weirong.jwem.activity.NetworkSettingActivity.initView(NetworkSettingActivity.java:142)
01-20 01:37:43.213: E/AndroidRuntime(3677): at com.weirong.jwem.activity.NetworkSettingActivity.onCreate(NetworkSettingActivity.java:84)
01-20 01:37:43.213: E/AndroidRuntime(3677): at android.app.Activity.performCreate(Activity.java:5231)
01-20 01:37:43.213: E/AndroidRuntime(3677): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
01-20 01:37:43.213: E/AndroidRuntime(3677): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
01-20 01:37:43.213: E/AndroidRuntime(3677): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
01-20 01:37:43.213: E/AndroidRuntime(3677): at android.app.ActivityThread.access$800(ActivityThread.java:135)
01-20 01:37:43.213: E/AndroidRuntime(3677): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
01-20 01:37:43.213: E/AndroidRuntime(3677): at android.os.Handler.dispatchMessage(Handler.java:102)
01-20 01:37:43.213: E/AndroidRuntime(3677): at android.os.Looper.loop(Looper.java:136)
01-20 01:37:43.213: E/AndroidRuntime(3677): at android.app.ActivityThread.main(ActivityThread.java:5017)
01-20 01:37:43.213: E/AndroidRuntime(3677): at java.lang.reflect.Method.invokeNative(Native Method)
01-20 01:37:43.213: E/AndroidRuntime(3677): at java.lang.reflect.Method.invoke(Method.java:515)
01-20 01:37:43.213: E/AndroidRuntime(3677): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
01-20 01:37:43.213: E/AndroidRuntime(3677): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
01-20 01:37:43.213: E/AndroidRuntime(3677): at dalvik.system.NativeStart.main(Native Method)