Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import android.content.Context;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import java.net.InetAddress;
import java.net.UnknownHostException;

public class Main {
    /**
     * get the local ip address by Android System
     * 
     * @param context
     *            the context
     * @return the local ip addr allocated by Ap
     */
    public static InetAddress getLocalInetAddress(Context context) {
        WifiManager wm = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
        WifiInfo wifiInfo = wm.getConnectionInfo();
        int localAddrInt = wifiInfo.getIpAddress();
        String localAddrStr = __formatString(localAddrInt);
        InetAddress localInetAddr = null;
        try {
            localInetAddr = InetAddress.getByName(localAddrStr);
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
        return localInetAddr;
    }

    private static String __formatString(int value) {
        String strValue = "";
        byte[] ary = __intToByteArray(value);
        for (int i = ary.length - 1; i >= 0; i--) {
            strValue += (ary[i] & 0xFF);
            if (i > 0) {
                strValue += ".";
            }
        }
        return strValue;
    }

    private static byte[] __intToByteArray(int value) {
        byte[] b = new byte[4];
        for (int i = 0; i < 4; i++) {
            int offset = (b.length - 1 - i) * 8;
            b[i] = (byte) ((value >>> offset) & 0xFF);
        }
        return b;
    }
}