Internet时间同步服务器地址

阿里云提供了7个NTP时间服务器也就是Internet时间同步服务器地址

ntp1.aliyun.com

ntp2.aliyun.com

ntp3.aliyun.com

ntp4.aliyun.com

ntp5.aliyun.com

ntp6.aliyun.com

ntp7.aliyun.com

需要frameworks_6.0_copy\base\core\java\android\net\SntpClient.java

	static final int NTP_TIMEOUT_10_S = 10000;
	static final String[] mNtpServers = { "cn.pool.ntp.org", "ntp1.aliyun.com", "ntp2.aliyun.com", "ntp3.aliyun.com",
			"ntp4.aliyun.com", "ntp5.aliyun.com", "ntp6.aliyun.com", "ntp7.aliyun.com", };

	void syncTime() {
		SntpClient client = new SntpClient();
		for (int i = 0; i < mNtpServers.length; i++) {
			boolean flag = client.requestTime(mNtpServers[i], NTP_TIMEOUT_10_S);
			if (flag) {
				long now = client.getNtpTime() + SystemClock.elapsedRealtime() - client.getNtpTimeReference();
				SystemClock.setCurrentTimeMillis(now);
				break;
			}
		}
	}

	public static void startSyncTimeThread(Context context) {
		Log.i(TAG, "ntp---startSyncTimeThread.");

		boolean autoUpdateTimeEnable = getAutoState(context, Settings.Global.AUTO_TIME);
		if (!autoUpdateTimeEnable) {
			return;
		}

		new Thread() {

			@Override
			public void run() {
				// TODO Auto-generated method stub
				Log.i(TAG, "ntp---thread run.");

				syncTime();
			}

		}.start();
	}