Android:Ping命令测试网络

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import android.app.Activity; import android.os.AsyncTask; import android.os.Bundle; import android.util.Log; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); new NetPing().execute(); } public String Ping(String str) { String resault = ""; Process p; try { //ping -c 3 -w 100 中，-c 是指ping的次数 3是指ping 3次，-w 100 以秒为单位指定超时间隔，是指超时时间为100秒 p = Runtime.getRuntime().exec("ping -c 3 -w 100 " + str); int status = p.waitFor(); InputStream input = p.getInputStream(); BufferedReader in = new BufferedReader(new InputStreamReader(input)); StringBuffer buffer = new StringBuffer(); String line = ""; while ((line = in.readLine()) != null){ buffer.append(line); } System.out.println("Return ============" + buffer.toString()); if (status == 0) { resault = "success"; } else { resault = "faild"; } } catch (IOException e) { e.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); } return resault; } private class NetPing extends AsyncTask<String, String, String> { @Override protected String doInBackground(String... params) { String s = ""; s = Ping("www.baidu.com"); Log.i("ping", s); return s; } } }

　！！！别忘了加访问网络权限！！！　　下面是运行截图：

　　如果对运行结果中的 PING www.a.shifen.com (61.135.169.125) 感到怀疑，那么可以试一下 61.135.169.125 就是百度的网址。　　suceess则表示连接成功　　如果当前没有连接网络，return 会是空的，结果会是 faild。　　如果ping的网址是不存在的，而且还连接着网络，那么程序就会停在　　int status = p.waitFor(); 　　这里，不再向下运行。　　Ping远程IP  　　这一命令可以检测本机能否正常访问Internet。比如本地电信运营商的IP地址为：202.101.224.69。在MS-DOS方式下执行命令：Ping 202.101.224.69，如果屏幕显示：

C:\Documents and Settings\Administrator>ping 202.101.224.69 Pinging 202.101.224.69 with 32 bytes of data: Reply from 202.101.224.69: bytes=32 time=2ms TTL=250 Reply from 202.101.224.69: bytes=32 time=2ms TTL=250 Reply from 202.101.224.69: bytes=32 time=3ms TTL=250 Reply from 202.101.224.69: bytes=32 time=2ms TTL=250 Ping statistics for 202.101.224.69: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 2ms, Maximum = 3ms, Average = 2ms

　　则表明运行正常，能够正常接入互联网。反之，则表明主机文件（windows/host）存在问题。

Android:Ping命令测试网络

Android:Ping命令测试网络

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