Android 判断网络连接

 1 import android.content.Context; 2 import android.net.ConnectivityManager; 3 import android.net.NetworkInfo; 4  5 /** 6  * 网络工具类 添加网络状态许可：<uses-permission 7  * android:name="android.permission.ACCESS_NETWORK_STATE"/> 8  *  9  * @author benny10  * 11  */12 public class NetworkUtil {13 14     /**15      * 网络连接状态16      *  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>17      * @param context18      *            程序上下文19      * @return true:可连接20      */21     public static boolean isNetworkConnected(Context context) {22         if (context != null) {23             ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);24 25             NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();26             if (networkInfo != null) {27                 return networkInfo.isAvailable();28             }29         }30         return false;31     }32 33     /**34      * WiFi 网络连接状态35      *  <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>36      * @param context37      *            程序上下文38      * @return true:可连接39      */40     public static boolean isWifiConnected(Context context) {41         if (context != null) {42             ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);43 44             NetworkInfo networkInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);45             if (networkInfo != null) {46                 return networkInfo.isAvailable();47             }48         }49         return false;50     }51 52     /**53      * Mobile 网络连接状态54      * <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>55      * 56      * @param context57      *            程序上下文58      * @return true:可连接59      */60     public static boolean isMobileConnected(Context context) {61         if (context != null) {62             ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);63 64             NetworkInfo networkInfo =  connectivityManager.getActiveNetworkInfo();65             if (networkInfo != null && networkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {66                     return networkInfo.isAvailable();67             }68         }69         return false;70     }71 72     /**73      * 获取网络连接类型74      * @param context 程序上下文75      * @return ConnectivityManager.TYPE_XXXX76      */77     public static int getConnectedType(Context context) {78         if (context != null) {79             ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);80             NetworkInfo mNetworkInfo = connectivityManager.getActiveNetworkInfo();81             if (mNetworkInfo != null && mNetworkInfo.isAvailable()) {82                 return mNetworkInfo.getType();83             }84         }85         return -1;86     }87 88 }
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