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Determine if IP Address is STATIC or DHCP using Android?

I am working on android system application. I would like to know if IP address is DHCP or STATIC.
Do we have any android java class for this? Or is there any way to get it from sysfs like /sysfs/class/net/eth0?

I used this to check wether is DHCP or STATIC years ago, perhaps you can try it out, if it does not work I'll remove the answer.
WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiInfo connectionInfo = wifiManager.getConnectionInfo();
List<WifiConfiguration> configuredNetworks = wifiManager.getConfiguredNetworks();
for (WifiConfiguration wificonf : configuredNetworks){
if (wificonf.networkId == connectionInfo.getNetworkId()){
if (wificonf.toString().toLowerCase().indexOf("DHCP".toLowerCase())>-1){
//DHCP
}else if(wificonf.toString().toLowerCase().indexOf("STATIC".toLowerCase())>-1){
//STATIC
}
break;
}
}

Connect to Wifi [without Internet] with a high priority [block auto connection]?

I have already asked this question, but it has no answers and I have to keep working. So here I ask this question for the second time.
old question: Connect to Wifi [without Internet] with a high priority?
I have a problem. I develop a android app, which should also connect to a wifi [without internet, just to controll a robot, webinterface: 10.10.0.1].
MY PROBLEM: If I connect to the robot wifi, Android prevents the connection and connect to my default home wlan.
What can I change to connect to robot wifi without problems?
My connection function:
public static void connectToWifi(String ssid, String pass){
WifiManager myWifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
WifiConfiguration conf = new WifiConfiguration();
conf.SSID = "\"" + ssid + "\"";
conf.preSharedKey = "\""+ pass +"\"";
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
List<WifiConfiguration> list = MainActivity.wifi.getConfiguredNetworks();
for( WifiConfiguration i : list ) {
if(i.SSID != null && i.SSID.equals("\"" + ssid + "\"")) {
MainActivity.wifi.disconnect();
MainActivity.wifi.enableNetwork(i.networkId, true);
MainActivity.wifi.reconnect();
break;
}
}
}

Java IP Address,MAC address return with name of device [duplicate]

This question already has an answer here:
Android Quickly Find All Local Devices on Network
(1 answer)
Closed 6 years ago.
I am trying to code in android to return the name of all devices and their ip on the wifi. I am having trouble on how to approach this. All of the examples online return only the localhost and its information. i.e.
try {
InetAddress localhost = InetAddress.getLocalHost();
System.out.println(" IP Addr: " + localhost.getHostAddress());
// Just in case this host has multiple IP addresses....
InetAddress[] allMyIps = InetAddress.getAllByName(localhost.getCanonicalHostName());
if (allMyIps != null && allMyIps.length > 1) {
System.out.println(" Full list of IP addresses:");
for (int i = 0; i < allMyIps.length; i++) {
System.out.println(" " + allMyIps[i]);
}
}
} catch (UnknownHostException e) {
System.out.println(" (error retrieving server host name)");
}
try {
System.out.println("Full list of Network Interfaces:");
for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements(); ) {
NetworkInterface intf = en.nextElement();
System.out.println(" " + intf.getName() + " " + intf.getDisplayName());
for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements(); ) {
System.out.println(" " + enumIpAddr.nextElement().toString());
}
}
} catch (SocketException e) {
System.out.println(" (error retrieving network interface list)");
}
This is not necessarily What I want, since I want to return all of the devices on the wifi.
I don't know how to go about this.
please help, thank you !

WifiManager This class provides the primary API for managing all aspects of Wi-Fi connectivity. Get an instance of this class by calling Context.getSystemService(Context.WIFI_SERVICE). It deals with several categories of items:
The list of configured networks. The list can be viewed and updated, and attributes of individual entries can be modified.
The currently active Wi-Fi network, if any. Connectivity can be established or torn down, and dynamic information about the state of the network can be queried.
Results of access point scans, containing enough information to make decisions about what access point to connect to.
It defines the names of various Intent actions that are broadcast upon any sort of change in Wi-Fi state.
WifiInfo Describes the state of any Wifi connection that is active or is in the process of being set up.
Example:
WifiManager wifiMgr = (WifiManager) getSystemService(WIFI_SERVICE);
WifiInfo wifiInfo = wifiMgr.getConnectionInfo();
int ip = wifiInfo.getIpAddress();
String ipAddress = Formatter.formatIpAddress(ip);
String macAddress = wifiInfo.getMacAddress();
Ensure you have modified your manifest with the following:
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
Sources:
1. WifiManager
2. WifiInfo API

Is there any method to find the ip address of nearest access point in my wifi network?

I use inssider and kismac for checking the wifi indoor and outdoor accesspoints in my network. But both these tools doesn't provide any info on the ip of the access point currently connected. Its seen that netstumbler in windows had an option to display ip address and subnet but, though they have the fields, it doesn't display anything. I don't find any app that fulfills this requirement.
Is there any method to find the ip address of the nearest accesspoint in my wifi network? programmatically or is there any app?
is there any method in python , objective c , java where a request for ip-address of an ap returns it.
I use osx 10.9

use following way to achieve
public String getIpAddr() {
WifiManager wifiManager = (WifiManager) getSystemService(WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
int ip = wifiInfo.getIpAddress();
String ipString = String.format(
"%d.%d.%d.%d",
(ip & 0xff),
(ip >> 8 & 0xff),
(ip >> 16 & 0xff),
(ip >> 24 & 0xff));
return ipString;
}
Please Note: You need to add android.permission.INTERNET and android.permission.ACCESS_WIFI_STATE in your AndroidManifest.xml as to access the code.
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
for google play similar type of app look at https://play.google.com/store/apps/details?id=com.roamingsoft.manager&hl=en

You cant get ip of AP without connecting to it.
You can get ip of connected AP by following
DhcpInfo dhcp;
WifiManager wifii;
wifii = (WifiManager) getSystemService(Context.WIFI_SERVICE);
dhcp = wifii.getDhcpInfo();
s_dns1 = "DNS 1: " + String.valueOf(dhcp.dns1);
s_dns2 = "DNS 2: " + String.valueOf(dhcp.dns2);
s_gateway = "Default Gateway: " + String.valueOf(dhcp.gateway);
s_ipAddress = "IP Address: " + String.valueOf(dhcp.ipAddress);
s_leaseDuration = "Lease Time: " + String.valueOf(dhcp.leaseDuration);
s_netmask = "Subnet Mask: " + String.valueOf(dhcp.netmask);
s_serverAddress = "Server IP: " + String.valueOf(dhcp.serverAddress);

Android IP address with java

I'm writing an Android video game that supports multiplayer. There is a dedicated server running which the androids connect to when the multiplayer button is clicked by opening a socket(this works fine). The server basically just acts as a matchmaking system.
When a client hosts a game, the server adds that client to the list of hosts. Other clients may choose to view this list and then subsequently connect to that host. This is where the problem is. The server is supposed to keep track of the ip/port of hosts, and then other clients are supposed to use this information to open a socket with the host and then the game starts. I'm trying to get the host to send its own IP address to server for other clients to use later.
I have tried many methods so far. One is:
try {
for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
NetworkInterface intf = en.nextElement();
for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
InetAddress inetAddress = enumIpAddr.nextElement();
if (!inetAddress.isLoopbackAddress()) {
return inetAddress.getHostAddress().toString();
}
}
}
} catch (SocketException ex) {
}
This returns 10.0.2.15, which is obviously useless for other clients.
The other method I've tried is this:
String hostName = InetAddress.getLocalHost().getHostName();
InetAddress addrs[] = InetAddress.getAllByName(hostName);
for (InetAddress addr: addrs) {
System.out.println ("addr.getHostAddress() = " + addr.getHostAddress());
System.out.println ("addr.getHostName() = " + addr.getHostName());
System.out.println ("addr.isAnyLocalAddress() = " + addr.isAnyLocalAddress());
System.out.println ("addr.isLinkLocalAddress() = " + addr.isLinkLocalAddress());
System.out.println ("addr.isLoopbackAddress() = " + addr.isLoopbackAddress());
System.out.println ("addr.isMulticastAddress() = " + addr.isMulticastAddress());
System.out.println ("addr.isSiteLocalAddress() = " + addr.isSiteLocalAddress());
System.out.println ("");
if (!addr.isLoopbackAddress()){// && addr.isSiteLocalAddress()) {
myIP = addr.getHostAddress();
}
This returns the ip address that I'm looking for when I run it as a java application, but when I run it as an android application, it doesn't work. The last if condition is somehow not satisfied and myIP ends up being null. Note that I have included the permissions: android.permission.INTERNET, android.permission.ACCESS_WIFI_STATE, android.permission.ACCESS_COARSE_LOCATION, android.permission.ACCESS_NETWORK_STATE.
Can anybody help me?

If you just need the IP for the Wifi connection you can retrieve the IP as a 32 bit integer:
WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
int ip = wifiInfo.getIpAddress();
Then, in order to construct the IP in dot-decimal notation; bit-shift and mask the result:
String ipString = String.format(
"%d.%d.%d.%d",
(ip & 0xff),
(ip >> 8 & 0xff),
(ip >> 16 & 0xff),
(ip >> 24 & 0xff));
android.permission.ACCESS_WIFI_STATE permission will be required in the manifest.

Do you have to rely on the host to figure out its own IP address and provide this to the server? If the host opens a connection and sends a message to the server announcing that it is hosting a game, then could the server use the IP address that the connection and message came from? This would avoid the problem altogether.

try this
WifiManager wim= (WifiManager) getSystemService(WIFI_SERVICE) ;
List<WifiConfiguration> l= wim.getConfiguredNetworks();
WifiConfiguration wc=l.get(0);
textview.append( "\n"+ Formatter.formatIpAddress(wim.getConnectionInfo().getIpAddress()));