自动设置时间
I/GsmServiceStateTracker( 164): Auto time state changed
./res/values/strings.xml: <string name="date_time_auto_summaryOn">Use network-provided values</string>
./res/xml/date_time_prefs.xml: android:summaryOn="@string/date_time_auto_summaryOn"
<CheckBoxPreference android:key="auto_time"
./src/com/android/settings/DateTimeSettings.java: private static final String KEY_AUTO_TIME = "auto_time";
} else if (key.equals(KEY_AUTO_TIME)) {
boolean autoEnabled = preferences.getBoolean(key, true);
Settings.System.putInt(getContentResolver(),
Settings.System.AUTO_TIME,
autoEnabled ? 1 : 0);
mTimePref.setEnabled(!autoEnabled);
mDatePref.setEnabled(!autoEnabled);
mTimeZone.setEnabled(!autoEnabled);
}
frameworks/base/telephony/java/com/android/internal/telephony/gsm/GsmServiceStateTracker.java: Settings.System.getUriFor(Settings.System.AUTO_TIME), true,
frameworks/base/telephony/java/com/android/internal/telephony/gsm/GsmServiceStateTracker.java: Settings.System.AUTO_TIME) > 0;
frameworks/base/telephony/java/com/android/internal/telephony/gsm/GsmServiceStateTracker.java: Settings.System.AUTO_TIME, 0) == 0) {
public class SntpClient
public boolean requestTime(String host, int timeout) {
jeff@translogic-desktop:jeff-2.3.7_r1$ grep "SntpClient" frameworks/base/ -r --include=*.java
frameworks/base/services/java/com/android/server/ThrottleService.java:import android.net.SntpClient;
frameworks/base/services/java/com/android/server/ThrottleService.java: SntpClient client = new SntpClient();
frameworks/base/services/java/com/android/server/location/GpsLocationProvider.java:import android.net.SntpClient;
frameworks/base/services/java/com/android/server/location/GpsLocationProvider.java: SntpClient client = new SntpClient();
Properties properties = new Properties();
File file = new File(PROPERTIES_FILE);
stream = new FileInputStream(file);
properties.load(stream);
mNtpServer = properties.getProperty("NTP_SERVER", null);
D/gps_gns ( 95): gns_gps_get_extension: 822 called
D/GpsLocationProvider( 95): NTP server returned: 1328409970993 (Sun Feb 05 10:46:10 GMT+08:00 2012) reference: 33397 certainty: 40 system time offset: -27681758038
D/gps_gns ( 95): gns_gps_inject_time: 801 called
D/SntpClient( 95): request time failed: java.net.UnknownHostException: cn.pool.ntp.org
Log.d(TAG, "NTP server returned: "
+ time + " (" + new Date(time)
+ ") reference: " + timeReference
+ " certainty: " + certainty
+ " system time offset: " + (time - now));
native_inject_time(time, timeReference, certainty);
const GpsInterface* interface = GetGpsInterface(env, obj);
if (interface)
interface->inject_time(time, timeReference, uncertainty);
static int
gns_gps_inject_time(GpsUtcTime time, int64_t timeReference, int uncertainty)
{
//uncertainty ntp transmitTime
//timeReference when we got the ntp times.
//time ntp time
//gnx call GN_GPS_Read_UTC to get the rtc times. so this func is unuseful.
RUNTO;
return 0;
}
丢掉了。
case UPDATE_NETWORK_STATE:
handleUpdateNetworkState(msg.arg1, (NetworkInfo)msg.obj);
public void updateNetworkState(int state, NetworkInfo info) {
sendMessage(UPDATE_NETWORK_STATE, state, info);
}
private long getBestTime() {
D/ThrottleService( 82): found Authoritative time - reseting alarm
V/ThrottleService( 82): using Authoritative time: 1328424173598
D/ThrottleService( 82): NTP server returned: 1328424173598 (Sun Feb 05 14:42:53 ?????—?°??2????????—?é—′+0800 2012) reference: 102416 certainty: 54 system time offset: -27627759453
SystemClock.setCurrentTimeMillis(cachedNtp); //jeff. set as local time.
在packages/apps/Settings/src/com/android/settings/DateTimeSettings.java
onSharedPreferenceChanged(...）
{
} else if (key.equals(KEY_AUTO_TIME)) {
boolean autoEnabled = preferences.getBoolean(key, true);
Settings.System.putInt(getContentResolver(),
Settings.System.AUTO_TIME,
autoEnabled ? 1 : 0);
mTimePref.setEnabled(!autoEnabled);
mDatePref.setEnabled(!autoEnabled);
mTimeZone.setEnabled(!autoEnabled);
//jeff. if auto time. send broadcast.
if(autoEnabled){
Intent autoTime = new Intent(Intent.ACTION_AUTO_TIME);
sendBroadcast(autoTime);
}
}
}
ACTION_AUTO_TIME为新添加,在
frameworks/base/core/java/android/content/Intent.java
/**
* Broadcast Action: To get time from ntp server, jeff.
* @hide
*/
@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
public static final String ACTION_AUTO_TIME = "android.intent.action.AUTO_TIME";
而在frameworks/base/services/java/com/android/server/ThrottleService.java中响应ACTION_AUTO_TIME:
import android.provider.Settings.SettingNotFoundException; //jeff
public ThrottleService(Context context) {
//jeff. add auto time.
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_AUTO_TIME);
mContext.registerReceiver(mIntentReceiver, filter);
}
//jeff add.
private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if(Intent.ACTION_AUTO_TIME.equals(action)){
getNtpTime();
}
}
};
//jeff add.
private boolean getAutoTime() {
try {
return Settings.System.getInt(mContext.getContentResolver(), Settings.System.AUTO_TIME) > 0;
} catch (SettingNotFoundException snfe) {
return true;
}
}
private void getNtpTime() {
if (mNtpServer != null) {
/*if (mNtpActive) {
long ntpAge = SystemClock.elapsedRealtime() - cachedNtpTimestamp;
if (ntpAge < mMaxNtpCacheAgeSec * 1000) {
if (VDBG) Slog.v(TAG, "using cached time");
return cachedNtp + ntpAge;
}
}*/
SntpClient client = new SntpClient();
if (client.requestTime(mNtpServer, MAX_NTP_FETCH_WAIT)) {
cachedNtp = client.getNtpTime();
cachedNtpTimestamp = SystemClock.elapsedRealtime();
/*if (!mNtpActive) {
mNtpActive = true;
if (VDBG) Slog.d(TAG, "found Authoritative time - reseting alarm");
mHandler.obtainMessage(EVENT_RESET_ALARM).sendToTarget();
}*/
if (VDBG) Slog.v(TAG, "using Authoritative time: " + cachedNtp);
if(getAutoTime())
SystemClock.setCurrentTimeMillis(cachedNtp); //jeff. set as local time.
//return cachedNtp;
}
}
}