Android/wifi判定

AndroidManifest.xml

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

TestActivity.java

       Context context = getApplicationContext();
       ConnectivityManager connMgr = (ConnectivityManager)
       context.getSystemService(Context.CONNECTIVITY_SERVICE);
       NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
       if (networkInfo != null && networkInfo.isConnected()) {
           if (networkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
               Log.i("tag", "wifi");
           } else {
               Log.i("tag", "mobile");
           }
       } else {
           Log.i("tag", "not connected");
       }