</pre><pre name="code" class="java">/**
 * 判斷網路狀態的工具類
 * 
 */
public class NetworkUtil {
 
    /* 程式碼IP */
    private static String PROXY_IP = null;
    /* 代理埠 */
    private static int PROXY_PORT = 0;
    /**
     * 判斷當前是否有網路連線
     * 
     * @param context
     * @return
     */
    public static boolean isNetwork(Context context) {
        boolean network = isWifi(context);
        boolean mobilework = isMobile(context);
        if (!network && !mobilework) { // 無網路連線
            Log.i(NetworkUtil, 無網路連結！);
            return false;
        } else if (network == true && mobilework == false) { // wifi連線
            Log.i(NetworkUtil, wifi連線！);
        } else { // 網路連線
            Log.i(NetworkUtil, 手機網路連線，讀取代理資訊！);
            readProxy(context); // 讀取代理資訊
            return true;
        }
        return true;
    }
 
    /**
     * 讀取網路代理
     * 
     * @param context
     */
    private static void readProxy(Context context) {
        Uri uri = Uri.parse(content://telephony/carriers/preferapn);
        ContentResolver resolver = context.getContentResolver();
        Cursor cursor = resolver.query(uri, null, null, null, null);
        if (cursor != null && cursor.moveToFirst()) {
            PROXY_IP = cursor.getString(cursor.getColumnIndex(proxy));
            PROXY_PORT = cursor.getInt(cursor.getColumnIndex(port));
        }
        cursor.close();
    }
 
    /**
     * 判斷當前網路是否是wifi區域網
     * 
     * @param context
     * @return
     */
    public static boolean isWifi(Context context) {
        ConnectivityManager manager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo info = manager
                .getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        if (info != null) {
            return info.isConnected(); // 返回網路連線狀態
        }
        return false;
    }
 
    /**
     * 判斷當前網路是否是手機網路
     * 
     * @param context
     * @return
     */
    public static boolean isMobile(Context context) {
        ConnectivityManager manager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo info = manager
                .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
        if (info != null) {
            return info.isConnected(); // 返回網路連線狀態
        }
        return false;
    }
}