BlackBerry OS如何连接VPN并获取IP地址

本示例展示了如何在BlackBerry OS设备上连接VPN，并获取IP地址。代码使用BlackBerry JDE 4.7.0进行编写。

import net.rim.device.api.servicebook.ServiceBook;
import net.rim.device.api.servicebook.ServiceRecord;
import net.rim.device.api.system.CoverageInfo;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.Dialog;

public class VPNConnection extends UiApplication {
   public static void main(String[] args) {
       VPNConnection app = new VPNConnection();
       app.enterEventDispatcher();
   }

   public VPNConnection() {
       boolean vpnConnected = false;

       // 检查是否有网络覆盖
       if (CoverageInfo.getCoverageStatus() == CoverageInfo.COVERAGE_NONE) {
           Dialog.alert("Unable to connect to VPN: no network coverage.");
           return;
       }

       // 查找VPN服务记录
       ServiceBook sb = ServiceBook.getSB();
       ServiceRecord[] records = sb.getRecords();
       for (int i = 0; i < records.length; i++) {
           ServiceRecord sr = records[i];
           if (sr.getCid().toLowerCase().equals("vpn")) {
               String uid = sr.getUid();
               String name = sr.getName();
               if (name.toLowerCase().indexOf("my_vpn") != -1) {
                   //连接VPN
                   vpnConnected = CoverageInfo
                                     .isCoverageSufficient(CoverageInfo.COVERAGE_DIRECT,
                                                           0);
                   break;
               }
           }
       }

       // 检查是否连接成功
       if (vpnConnected) {
           String ipAddress = CoverageInfo.getCoverageInfo().getIpAddress();
           Dialog.alert("VPN connection successful. IP address: " + ipAddress);
       } else {
           Dialog.alert("Unable to connect to VPN.");
       }
       System.exit(0);
   }
}

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