求一种RK3399 Android7.1.1自动同步日期和时间无效的解决方案

测试平台

Platform: RK3399
OS: Android 7.1.1

现象

Android自动同步时间是通过NtpServer来同步时间的，但是默认的服务器使用的是Google的所以无法连接.

解决方案

修改默认的Ntp服务器
diff --git a/frameworks/base/packages/SettingsProvider/packages/SettingsProvider/res/values/defaults.xml
b/frameworks/base/packages/SettingsProvider/packages/SettingsProvider/res/values/defaults.xml
index 07d968a..782f613 100644
--- a/frameworks/base/packages/SettingsProvider/packages/SettingsProvider/res/values/defaults.xml
+++ b/frameworks/base/packages/SettingsProvider/packages/SettingsProvider/res/values/defaults.xml
[url=home.php?mod=space&uid=1999721]@@[/url] -231,4 +231,6 @@
<item name="def_font_scale" format="float" type="dimen">1.15</item>

• time.windows.com

diff --git

a/frameworks/base/packages/SettingsProvider/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java b/frameworks/base/packages/SettingsProvider/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
index 57776e2..d9fcefd 100644
--- a/frameworks/base/packages/SettingsProvider/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
+++ b/frameworks/base/packages/SettingsProvider/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
@@ -2727,6 +2727,10 @@ class DatabaseHelper extends SQLiteOpenHelper {
loadSetting(stmt, Settings.Global.ENHANCED_4G_MODE_ENABLED,
ImsConfig.FeatureValueConstants.ON);

• loadStringSetting(stmt, Settings.Global.NTP_SERVER,
  

• R.string.def_ntp_server);
  

• /*
          * IMPORTANT: Do not add any more upgrade steps here as the global,
          * secure, and system settings are no longer stored in a database
  

添加多个Ntp服务器用于轮询,避免默认Ntp服务器失效
diff --git a/frameworks/base/core/java/android/util/NtpTrustedTime.java b/frameworks/base/core/java/android/util/NtpTrustedTime.java

index ed2d3c6..36e5b11 100644 (file)

--- a/frameworks/base/core/java/android/util/NtpTrustedTime.java
+++ b/frameworks/base/core/java/android/util/NtpTrustedTime.java
@@ -39,7 +39,7 @@ public class NtpTrustedTime implements TrustedTime {
private static NtpTrustedTime sSingleton;
private static Context sContext;

• private final String mServer;

• private String mServer;
  private final long mTimeout;

private ConnectivityManager mCM;

@@ -49,6 +49,13 @@ public class NtpTrustedTime implements TrustedTime {
private long mCachedNtpElapsedRealtime;
private long mCachedNtpCertainty;

• String[] backupNtpServers = new String[]{

• "tw.pool.ntp.org",
  

• "time.nist.gov",
  

• "time-a.nist.gov"
  

• };

• int index = -1;

• private NtpTrustedTime(String server, long timeout) {
  if (LOGD) Log.d(TAG, "creating NtpTrustedTime using " + server);
  mServer = server;
  @@ -101,15 +108,28 @@ public class NtpTrustedTime implements TrustedTime {

  if (LOGD) Log.d(TAG, "forceRefresh() from cache miss");
    final SntpClient client = new SntpClient();
  

• if (client.requestTime(mServer, (int) mTimeout)) {
  

• mHasCache = true;
  

• mCachedNtpTime = client.getNtpTime();
  

• mCachedNtpElapsedRealtime = client.getNtpTimeReference();
  

• mCachedNtpCertainty = client.getRoundTripTime() / 2;
  

• return true;
  

• } else {
  

• return false;
  

• }
  

• boolean result = false;
  

• while(!(result = client.requestTime(mServer, (int)mTimeout)) && index < (backupNtpServers.length-1)){
  

• index++;
  

• mServer = backupNtpServers[index];
  

• }
  

• index = -1;
  

• Resources res = sContext.getResources();
  

• String defaultServer = res.getString(
  

• com.android.internal.R.string.config_ntpServer);
  

• String secureServer = Settings.Global.getString(
  

• sContext.getContentResolver(), Settings.Global.NTP_SERVER);
  

• mServer  = secureServer != null ? secureServer : defaultServer;
  

• if(result){
  

• mHasCache = true;
  

• mCachedNtpTime = client.getNtpTime();
  

• mCachedNtpElapsedRealtime = client.getNtpTimeReference();
  

• mCachedNtpCertainty = client.getRoundTripTime() / 2;
  

• }
  

• `
  return result;

  }

  @Override

原作者：风之空响