android 判断wifi和蜂窝网络连接

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

  ConnectivityManager cm = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);

     

       NetworkInfo ni = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);

       boolean isWifiAvail = ni.isAvailable();

       boolean isWifiConn = ni.isConnected();

       

       ni = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

       boolean isMobileAvail = ni.isAvailable();

       boolean isMobilConn = ni.isConnected();