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; } } }