Android：获取设备的mac地址靠得住的方法

/**	 * 获取设备的mac地址	 * 	 * @param ac	 * @param callback	 *            成功获取到mac地址之后会回调此方法	 */	public static void getMacAddress(final Activity ac, final SimpleCallback callback) {		final WifiManager wm = (WifiManager) ac .getSystemService(Service.WIFI_SERVICE);		// 如果本次开机后打开过WIFI，则能够直接获取到mac信息。立刻返回数据。		WifiInfo info = wm.getConnectionInfo();		if (info != null && info.getMacAddress() != null) {			if (callback != null) {				callback.onComplete(info.getMacAddress());			}			return;		}		// 尝试打开WIFI，并获取mac地址		if (!wm.isWifiEnabled()) {			wm.setWifiEnabled(true);		}		new Thread(new Runnable() {			@Override			public void run() {				int tryCount = 0;				final int MAX_COUNT = 10;				while (tryCount < MAX_COUNT) {					final WifiInfo info = wm.getConnectionInfo();					if (info != null && info.getMacAddress() != null) {						if (callback != null) {							ac.runOnUiThread(new Runnable() {								@Override								public void run() {									callback.onComplete(info.getMacAddress());								}							});						}						return;					}					SystemClock.sleep(300);					tryCount++;				}				// 未获取到mac地址				if (callback != null) {					callback.onComplete(null);				}			}		}).start();	}

SimpleCallback是一个简单的回调接口：

public interface SimpleCallback {	void onComplete(String result);}