我需要检查
Android中是否有互联网,所以我尝试使用以下功能:
boolean b_IsConnect = isNetworkAvailable(); private boolean isNetworkAvailable() { ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo activeNetworkInfo = connectivityManager .getActiveNetworkInfo(); return activeNetworkInfo != null; }
我还在清单中添加了所需的权限:
<uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.WAKE_LOCK" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" > <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
但它仍然抛出异常:
05-02 16:05:26.226: E/AndroidRuntime(481): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.housedisplay/com.housedisplay.RssActivity}: java.lang.SecurityException: ConnectivityService: Neither user 10038 nor current process has android.permission.ACCESS_NETWORK_STATE. 05-02 16:05:26.226: E/AndroidRuntime(481): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1736) 05-02 16:05:26.226: E/AndroidRuntime(481): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1752) 05-02 16:05:26.226: E/AndroidRuntime(481): at android.app.ActivityThread.access$1500(ActivityThread.java:123) 05-02 16:05:26.226: E/AndroidRuntime(481): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:993) 05-02 16:05:26.226: E/AndroidRuntime(481): at android.os.Handler.dispatchMessage(Handler.java:99) 05-02 16:05:26.226: E/AndroidRuntime(481): at android.os.Looper.loop(Looper.java:126) 05-02 16:05:26.226: E/AndroidRuntime(481): at android.app.ActivityThread.main(ActivityThread.java:3997) 05-02 16:05:26.226: E/AndroidRuntime(481): at java.lang.reflect.Method.invokeNative(Native Method) 05-02 16:05:26.226: E/AndroidRuntime(481): at java.lang.reflect.Method.invoke(Method.java:491) 05-02 16:05:26.226: E/AndroidRuntime(481): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841) 05-02 16:05:26.226: E/AndroidRuntime(481): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599) 05-02 16:05:26.226: E/AndroidRuntime(481): at dalvik.system.NativeStart.main(Native Method) 05-02 16:05:26.226: E/AndroidRuntime(481): Caused by: java.lang.SecurityException: ConnectivityService: Neither user 10038 nor current process has android.permission.ACCESS_NETWORK_STATE. 05-02 16:05:26.226: E/AndroidRuntime(481): at android.os.Parcel.readException(Parcel.java:1322) 05-02 16:05:26.226: E/AndroidRuntime(481): at android.os.Parcel.readException(Parcel.java:1276) 05-02 16:05:26.226: E/AndroidRuntime(481): at android.net.IConnectivityManager$Stub$Proxy.getActiveNetworkInfo(IConnectivityManager.java:446) 05-02 16:05:26.226: E/AndroidRuntime(481): at android.net.ConnectivityManager.getActiveNetworkInfo(ConnectivityManager.java:256) 05-02 16:05:26.226: E/AndroidRuntime(481): at com.housedisplay.RssActivity.isNetworkAvailable(RssActivity.java:218) 05-02 16:05:26.226: E/AndroidRuntime(481): at com.housedisplay.RssActivity.onCreate(RssActivity.java:59) 05-02 16:05:26.226: E/AndroidRuntime(481): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048) 05-02 16:05:26.226: E/AndroidRuntime(481): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1700)
你能告诉我这里发生了什么吗?
解决方法
< uses-permission android:name =“android.permission.ACCESS_COARSE_LOCATION”>缺少一个结束斜杠.可能导致解析XML的问题,这可能导致下一个< uses-permission ...>不能正确解析.
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