利用WifiManager取得IP
AndroidManifest.xml需要加入
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
1 | <?xml version="1.0" encoding="utf-8"?> |
3 | package="johnson.layout" |
4 | android:versionCode="1" |
5 | android:versionName="1.0"> |
6 | <uses-sdk android:minSdkVersion="8" /> |
7 | <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> |
8 | <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /> |
9 | <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> |
11 | <application android:icon="@drawable/icon" android:label="@string/app_name"> |
12 | <activity android:name=".Layout_testActivity" |
13 | android:label="@string/app_name"> |
15 | <action android:name="android.intent.action.MAIN" /> |
16 | <category android:name="android.intent.category.LAUNCHER" /> |
Java部份：
1 | import android.app.Activity; |
2 | import android.net.wifi.WifiManager; |
3 | import android.net.wifi.WifiInfo; |
4 | import android.os.Bundle; |
5 | import android.widget.TextView; |
7 | public class test extends Activity { |
11 | public void onCreate(Bundle savedInstanceState) { |
12 | super.onCreate(savedInstanceState); |
13 | setContentView(R.layout.main); |
15 | ans = (TextView) findViewById( R.id.ans ); |
16 | ans.setText("IP：" + getMyIp() ); |
20 | private String getMyIp(){ |
22 | WifiManager wifi_service = (WifiManager)getSystemService(WIFI_SERVICE); |
24 | WifiInfo wifiInfo = wifi_service.getConnectionInfo(); |
26 | int ipAddress = wifiInfo.getIpAddress(); |
28 | String ip = String.format("%d.%d.%d.%d",(ipAddress & 0xff),(ipAddress >> 8 & 0xff),(ipAddress >> 16 & 0xff),(ipAddress >> 24 & 0xff)); |