How to Ping External IP from Java Android
JavaAndroidJava Problem Overview
I am developing a Ping application for Android 2.2.
I try my code and it works, but only in local IPs, that's my problem I want to do ping to external servers too.
Here is my code:
private OnClickListener milistener = new OnClickListener() {
public void onClick(View v) {
TextView info = (TextView) findViewById(R.id.info);
EditText edit = (EditText) findViewById(R.id.edit);
Editable host = edit.getText();
InetAddress in;
in = null;
// Definimos la ip de la cual haremos el ping
try {
in = InetAddress.getByName(host.toString());
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Definimos un tiempo en el cual ha de responder
try {
if (in.isReachable(5000)) {
info.setText("Responde OK");
} else {
info.setText("No responde: Time out");
}
} catch (IOException e) {
// TODO Auto-generated catch block
info.setText(e.toString());
}
}
};
> Ping 127.0.0.1 -> OK
> Ping 8.8.8.8 (Google DNS) -> Time Out
I put the following line at Manifest XML too:
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
Can anyone suggest me where I'm doing wrong?
Java Solutions
Solution 1 - Java
I tried following code, which works for me.
private boolean executeCommand(){
System.out.println("executeCommand");
Runtime runtime = Runtime.getRuntime();
try
{
Process mIpAddrProcess = runtime.exec("/system/bin/ping -c 1 8.8.8.8");
int mExitValue = mIpAddrProcess.waitFor();
System.out.println(" mExitValue "+mExitValue);
if(mExitValue==0){
return true;
}else{
return false;
}
}
catch (InterruptedException ignore)
{
ignore.printStackTrace();
System.out.println(" Exception:"+ignore);
}
catch (IOException e)
{
e.printStackTrace();
System.out.println(" Exception:"+e);
}
return false;
}
Solution 2 - Java
This is a simple ping I use in one of the projects:
public static class Ping {
public String net = "NO_CONNECTION";
public String host = "";
public String ip = "";
public int dns = Integer.MAX_VALUE;
public int cnt = Integer.MAX_VALUE;
}
public static Ping ping(URL url, Context ctx) {
Ping r = new Ping();
if (isNetworkConnected(ctx)) {
r.net = getNetworkType(ctx);
try {
String hostAddress;
long start = System.currentTimeMillis();
hostAddress = InetAddress.getByName(url.getHost()).getHostAddress();
long dnsResolved = System.currentTimeMillis();
Socket socket = new Socket(hostAddress, url.getPort());
socket.close();
long probeFinish = System.currentTimeMillis();
r.dns = (int) (dnsResolved - start);
r.cnt = (int) (probeFinish - dnsResolved);
r.host = url.getHost();
r.ip = hostAddress;
}
catch (Exception ex) {
Timber.e("Unable to ping");
}
}
return r;
}
public static boolean isNetworkConnected(Context context) {
ConnectivityManager cm =
(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
return activeNetwork != null && activeNetwork.isConnectedOrConnecting();
}
@Nullable
public static String getNetworkType(Context context) {
ConnectivityManager cm =
(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
if (activeNetwork != null) {
return activeNetwork.getTypeName();
}
return null;
}
Usage: ping(new URL("https://www.google.com:443/"), this);
Result: {"cnt":100,"dns":109,"host":"www.google.com","ip":"212.188.10.114","net":"WIFI"}
Solution 3 - Java
Run the ping utility in Android's command and parse output (assuming you have root permissions)
See the following Java code snippet:
executeCmd("ping -c 1 -w 1 google.com", false);
public static String executeCmd(String cmd, boolean sudo){
try {
Process p;
if(!sudo)
p= Runtime.getRuntime().exec(cmd);
else{
p= Runtime.getRuntime().exec(new String[]{"su", "-c", cmd});
}
BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
String s;
String res = "";
while ((s = stdInput.readLine()) != null) {
res += s + "\n";
}
p.destroy();
return res;
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
Solution 4 - Java
In my case ping works from device but not from the emulator. I found this documentation: http://developer.android.com/guide/developing/devices/emulator.html#emulatornetworking
On the topic of "Local Networking Limitations" it says: > "Depending on the environment, the emulator may not be able to support > other protocols (such as ICMP, used for "ping") might not be > supported. Currently, the emulator does not support IGMP or > multicast."
Further information: http://groups.google.com/group/android-developers/browse_thread/thread/8657506be6819297
> this is a known limitation of the QEMU user-mode network stack. > Quoting from the original doc: Note that ping is not supported > reliably to the internet as it would require root privileges. It > means you can only ping the local router (10.0.2.2).
Solution 5 - Java
Ping for the google server or any other server
public boolean isConecctedToInternet() {
Runtime runtime = Runtime.getRuntime();
try {
Process ipProcess = runtime.exec("/system/bin/ping -c 1 8.8.8.8");
int exitValue = ipProcess.waitFor();
return (exitValue == 0);
} catch (IOException e) { e.printStackTrace(); }
catch (InterruptedException e) { e.printStackTrace(); }
return false;
}
Solution 6 - Java
I implemented "ping" in pure Android Java and hosted it on gitlab. It does the same thing as the ping executable, but is much easier to configure. It's has a couple useful features like being able to bind to a given Network.
Solution 7 - Java
This is what I implemented myself, which returns the average latency:
/*
Returns the latency to a given server in mili-seconds by issuing a ping command.
system will issue NUMBER_OF_PACKTETS ICMP Echo Request packet each having size of 56 bytes
every second, and returns the avg latency of them.
Returns 0 when there is no connection
*/
public double getLatency(String ipAddress){
String pingCommand = "/system/bin/ping -c " + NUMBER_OF_PACKTETS + " " + ipAddress;
String inputLine = "";
double avgRtt = 0;
try {
// execute the command on the environment interface
Process process = Runtime.getRuntime().exec(pingCommand);
// gets the input stream to get the output of the executed command
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
inputLine = bufferedReader.readLine();
while ((inputLine != null)) {
if (inputLine.length() > 0 && inputLine.contains("avg")) { // when we get to the last line of executed ping command
break;
}
inputLine = bufferedReader.readLine();
}
}
catch (IOException e){
Log.v(DEBUG_TAG, "getLatency: EXCEPTION");
e.printStackTrace();
}
// Extracting the average round trip time from the inputLine string
String afterEqual = inputLine.substring(inputLine.indexOf("="), inputLine.length()).trim();
String afterFirstSlash = afterEqual.substring(afterEqual.indexOf('/') + 1, afterEqual.length()).trim();
String strAvgRtt = afterFirstSlash.substring(0, afterFirstSlash.indexOf('/'));
avgRtt = Double.valueOf(strAvgRtt);
return avgRtt;
}
Solution 8 - Java
Maybe ICMP packets are blocked by your (mobile) provider. If this code doesn't work on the emulator try to sniff via wireshark or any other sniffer and have a look whats up on the wire when you fire the isReachable() method.
You may also find some info in your device log.
Solution 9 - Java
To get the boolean value for the hit on the ip
public Boolean getInetAddressByName(String name)
{
AsyncTask<String, Void, Boolean> task = new AsyncTask<String, Void, Boolean>()
{
@Override
protected Boolean doInBackground(String... params) {
try
{
return InetAddress.getByName(params[0]).isReachable(2000);
}
catch (Exception e)
{
return null;
}
}
};
try {
return task.execute(name).get();
}
catch (InterruptedException e) {
return null;
}
catch (ExecutionException e) {
return null;
}
}
Solution 10 - Java
Use this Code: this method works on 4.3+ and also for below versions too.
try {
Process process = null;
if(Build.VERSION.SDK_INT <= 16) {
// shiny APIS
process = Runtime.getRuntime().exec(
"/system/bin/ping -w 1 -c 1 " + url);
}
else
{
process = new ProcessBuilder()
.command("/system/bin/ping", url)
.redirectErrorStream(true)
.start();
}
BufferedReader reader = new BufferedReader(new InputStreamReader(
process.getInputStream()));
StringBuffer output = new StringBuffer();
String temp;
while ( (temp = reader.readLine()) != null)//.read(buffer)) > 0)
{
output.append(temp);
count++;
}
reader.close();
if(count > 0)
str = output.toString();
process.destroy();
} catch (IOException e) {
e.printStackTrace();
}
Log.i("PING Count", ""+count);
Log.i("PING String", str);
Solution 11 - Java
Pink ip Address
public static int pingHost(String host, int timeout) throws IOException,
InterruptedException {
Runtime runtime = Runtime.getRuntime();
timeout /= 1000;
String cmd = "ping -c 1 -W " + timeout + " " + host;
Process proc = runtime.exec(cmd);
Log.d(TAG, cmd);
proc.waitFor();
int exit = proc.exitValue();
return exit;
}
Ping a host and return an int value of 0 or 1 or 2 0=success, 1=fail,
* 2=error