Android ntp服务动态替换_ntpserverchanger.apk

解决方案
1、关闭系统自动刷新，调用SntpClient类结构，自行实现刷新时间apk
2、修改setting数据库中ntp server的值，重启设备
frameworks\base\core\java\android\util\NtpTrustedTime.java

public static synchronized NtpTrustedTime getInstance(Context context) {
        if (sSingleton == null) {
            final Resources res = context.getResources();
            final ContentResolver resolver = context.getContentResolver();

            final String defaultServer = res.getString(
                    com.android.internal.R.string.config_ntpServer);
            final long defaultTimeout = res.getInteger(
                    com.android.internal.R.integer.config_ntpTimeout);

           // 修改此处获取的ntp server值，重启后会从数据库那最新的值
            final String secureServer = Settings.Global.getString(
                    resolver, Settings.Global.NTP_SERVER);
            final long timeout = Settings.Global.getLong(
                    resolver, Settings.Global.NTP_TIMEOUT, defaultTimeout);

            final String server = secureServer != null ? secureServer : defaultServer;
            sSingleton = new NtpTrustedTime(server, timeout);
            sContext = context;
        }

        return sSingleton;
    }
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

修改接口使用
frameworks\base\core\java\android\provider\Settings.java

        /**
         * Store a name/value pair into the database.
         * @param resolver to access the database with
         * @param name to store
         * @param value to associate with the name
         * @return true if the value was set, false on database errors
         */
        public static boolean putString(ContentResolver resolver,
                String name, String value) {
            return putStringForUser(resolver, name, value, UserHandle.myUserId());
        }
1
2
3
4
5
6
7
8
9
10
11

注意： 如果直接调用该结构，apk需要system权限；绕过的解决方案，系统服务中增加接口实现该函数的调用，然后给上层apk拉一个调用服务的接口，适用于系统深度定制开发