Need to know Wi-Fi access Point name in android

Use WifiManager .

WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
     if (wifiManager != null) {
         WifiInfo info = wifiManager.getConnectionInfo();
         if (info != null) {
            String ssid = info.getSSID();
            ...
     }           
}

Then you need to add permission to the manifest.

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />