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Update GPSTimeSyncService.java #4

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Update GPSTimeSyncService.java #4

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22 changes: 16 additions & 6 deletions app/src/main/java/org/swampsoft/gpstimesync/GPSTimeSyncService.java
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Original file line number Diff line number Diff line change
Expand Up @@ -40,8 +40,10 @@ public class GPSTimeSyncService extends AccessibilityService {
LocationListener locationListener;

long GPStime;
String gpsConverted_readable;
String gpsConverted;

String cmd;

@Override
public void onServiceConnected() {

Expand Down Expand Up @@ -139,18 +141,27 @@ void setupGPS(){
@Override
public void onLocationChanged(Location location) {

// GPS Week Number Rollover fallout 2.0 workaround (+1024 weeks, 1024 * 7 * 24 * 60 * 60 * 1000 = 619315200000L, big thx to uri2x)
// GPS Week Number Rollover fallout workarounds:
// 1st GPS Week Number epoch from 01/05/1980 @ 11:59pm (UTC) equivalent to 315964799000
// 2nd GPS Week Number epoch from 08/21/1999 @ 11:59pm (UTC) equivalent to 935279999000
// 3rd GPS Week Number epoch from 04/06/2019 @ 11:59pm (UTC) equivalent to 1554595199000
// 4th GPS Week Number epoch from 11/20/2038 @ 11:59pm (UTC) equivalent to 2173910399000
// ...
// (+1024 weeks, 1024 * 7 * 24 * 60 * 60 * 1000 = 619315200000L, big thx to uri2x)
// please adapt every some 19.7 years due to missing easy compile date var (DSTAMP, TSTAMP, TODAY?) ;-)
GPStime = location.getTime();
if ((GPStime > 0) & (GPStime < 1546300800000L)) {
if ((GPStime > 0) & (GPStime < 1554595199000L)) {
GPStime += 619315200000L;
}

// Android CMD Date Format change
if ((Integer.valueOf(android.os.Build.VERSION.SDK_INT)) < 23) {
// Android CMD date
if ((Integer.valueOf(android.os.Build.VERSION.SDK_INT)) < 23) { // Android 6.0+
gpsConverted = new java.text.SimpleDateFormat("yyyyMMdd.HHmmss").format(new java.util.Date(GPStime));
String cmd = "date -s " + gpsConverted + "\n";
}
else {
gpsConverted = new java.text.SimpleDateFormat("MMddHHmmyyyy.ss").format(new java.util.Date(GPStime));
String cmd = "date -u " + gpsConverted + " SET" + "\n"; // tested on Android 7.1.2
}

//Toast.makeText(getApplicationContext(), "GPS Time: " + GPStime + "\n\nConverted: " + gpsConverted, Toast.LENGTH_LONG).show();
Expand Down Expand Up @@ -204,7 +215,6 @@ private void setTime(){
// todo set time here
try {
System.out.println("** GPS Time Sync Service Setting Time...");
String cmd = "date -s " + gpsConverted + "\n";
bufferedWriter.write(cmd); // YYYYMMDD.HHmmss
bufferedWriter.flush();

Expand Down