利用WifiManager取得IP
AndroidManifest.xml需要加入
Java部份:
import android.app.Activity; import android.net.wifi.WifiManager; import android.net.wifi.WifiInfo; import android.os.Bundle; import android.widget.TextView; public class test extends Activity { TextView ans = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ans = (TextView) findViewById( R.id.ans ); ans.setText("IP:" + getMyIp() ); } //取得IP private String getMyIp(){ //新增一個WifiManager物件並取得WIFI_SERVICE WifiManager wifi_service = (WifiManager)getSystemService(WIFI_SERVICE); //取得wifi資訊 WifiInfo wifiInfo = wifi_service.getConnectionInfo(); //取得IP,但這會是一個詭異的數字,還要再自己換算才行 int ipAddress = wifiInfo.getIpAddress(); //利用位移運算和AND運算計算IP String ip = String.format("%d.%d.%d.%d",(ipAddress & 0xff),(ipAddress >> 8 & 0xff),(ipAddress >> 16 & 0xff),(ipAddress >> 24 & 0xff)); return ip; } }
Categories: Android