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标题: android判断网络连接 [打印本页]

作者: look_w 时间: 2019-4-12 15:22 标题: android判断网络连接

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.util.Log;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

/**
*/
public class InternetUtil {

private static final String NETIP = "www.baidu.com";

/**
   * 判断是否有网络连接
   *
   * @param context
   * @return
   */
public static boolean isNetworkConnected(Context context) {
      if (context != null) {
         ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                  .getSystemService(Context.CONNECTIVITY_SERVICE);
         NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
         if (mNetworkInfo != null) {
            return mNetworkInfo.isAvailable();
         }
      }
      return false;
}

/**
   * 判断WIFI网络是否可用
   *
   * @param context
   * @return
   */
public static boolean isWifiConnected(Context context) {
      if (context != null) {
         ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                  .getSystemService(Context.CONNECTIVITY_SERVICE);
         NetworkInfo mWiFiNetworkInfo = mConnectivityManager
                  .getNetworkInfo(ConnectivityManager.TYPE_WIFI);
         if (mWiFiNetworkInfo != null) {
            return mWiFiNetworkInfo.isAvailable();
         }
      }
      return false;
}

/**
   * 判断MOBILE网络是否可用
   *
   * @param context
   * @return
   */
public static boolean isMobileConnected(Context context) {
      if (context != null) {
         ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                  .getSystemService(Context.CONNECTIVITY_SERVICE);
         NetworkInfo mMobileNetworkInfo = mConnectivityManager
                  .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
         if (mMobileNetworkInfo != null) {
            return mMobileNetworkInfo.isAvailable();
         }
      }
      return false;
}

/**
   * 获取当前网络连接的类型信息
   *
   * @param context
   * @return
   */
public static int getConnectedType(Context context) {
      if (context != null) {
         ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                  .getSystemService(Context.CONNECTIVITY_SERVICE);
         NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
         if (mNetworkInfo != null && mNetworkInfo.isAvailable()) {
            return mNetworkInfo.getType();
         }
      }
      return -1;
}

/**
   * 连接上一个没有外网连接的WiFi
   * 或者有线就会出现极端的情况
   *
   * @return
   */
public static final boolean ping() {
      String result = null;
      try {
         String ip = NETIP;// ping 的地址，可以换成任何一种可靠的外网
         Process p = Runtime.getRuntime().exec("ping -c 3 -w 100 " + ip);// ping网址3次
         // 读取ping的内容，可以不加
         InputStream input = p.getInputStream();
         BufferedReader in = new BufferedReader(new InputStreamReader(input));
         StringBuffer stringBuffer = new StringBuffer();
         String content = "";
         while ((content = in.readLine()) != null) {
            stringBuffer.append(content);
         }
         Log.d("------ping-----", "result content : " + stringBuffer.toString());
         // ping的状态
         int status = p.waitFor();
         if (status == 0) {
            result = "success";
            return true;
         } else {
            result = "failed";
            return false;
         }
      } catch (IOException e) {
         result = "IOException";
         return false;
      } catch (InterruptedException e) {
         result = "InterruptedException";
         return false;
      } finally {
         Log.d("----result---", "result = " + result);
      }
}
}

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