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;
}
}
}