android判断用户网络部类

public class NetTestActivity extends Activity {	private static final int CMNET = 3;	private static final int CMWAP = 2;	private static final int WIFI = 1;	@Override	public void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.main);		getAPNType(this);	}	/**	 * 获取当前的网络状态 -1：没有网络 1：WIFI网络2：wap网络3：net网络	 * 	 * @param context	 * @return	 */	public static int getAPNType(Context context) {		int netType = -1;		ConnectivityManager connMgr = (ConnectivityManager) context				.getSystemService(Context.CONNECTIVITY_SERVICE);		NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();		if (networkInfo == null) {			return netType;		}		int nType = networkInfo.getType();		System.out.println("networkInfo.getExtraInfo() is "				+ networkInfo.getExtraInfo());		if (nType == ConnectivityManager.TYPE_MOBILE) {			if (networkInfo.getExtraInfo().toLowerCase().equals("cmnet")) {				netType = CMNET;			} else {				netType = CMWAP;			}		} else if (nType == ConnectivityManager.TYPE_WIFI) {			netType = WIFI;		}		return netType;	}}

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