AndroidTV: UsageStatsManager not returning details for apps results after Reboot

I am working on a Android TV app (system app) where i am trying to use UsageStatsManager to get recently used app list.
By following approach ,

UsageStatsManager usm = getUsageStatsManager(context);
Calendar calendar = Calendar.getInstance();
long endTime = calendar.getTimeInMillis();
calendar.add(Calendar.YEAR, -1)
final List<UsageStats> usageStatsList = usageStatsManager.queryUsageStats(UsageStatsManager.INTERVAL_YEARLY, startTime, endTime);

Above approach gives right usage data, but after a device reboot it wont give previously used app usage data, until that app has been opened again after reboot .

But same code works fine (after reboot) in an android Phone .

I also tried this sample App from Github in Android TV which also fails to give details after reboot in Android TV (but works in Mobile , both OS version 8) .

Any reason why it's failing to get App usage data for Android TV ?

TIA

Solution

@Nainal here is a workaround.

As we had experienced that after a device power cycle , Android Tv box won’t return the usage stats of installed application. Here is a workaround I followed .

We fetch the details of installed application then store only last used time in a Hash map.
And we used a custom comparator to compare via last time used and sort our Installed application details list (ResolveInfo) , for recently used app list.
Now to overcome the situation of device power cycle scenario, We are maintaining a Hash map locally in app . Where we will store the installed App’s Last used time as Long millis (epoch) . lastTimeUsedMap = new HashMap(); And we update the map every time we get a new data from UsageStatsManager.
We simplify the map object and store as string in shared preference.
And after reboot first we will find in usage stats if installed package is having a time stamp or not . If not we will get the time from stored MAP .

Here is the code :

private void SortByRecentlyUsed(final List<ResolveInfo> info, final Context context){

    /*load LastTimeUsedMap from pref*/
    lastTimeUsedMap = loadLastTimeUsedMap(context);

    UsageStatsManager usm = getUsageStatsManager(context);
    Calendar calendar = Calendar.getInstance();
    long endTime = calendar.getTimeInMillis();
    calendar.add(Calendar.MONTH, -1);
    long startTime = calendar.getTimeInMillis();

    final List<UsageStats> usageStatsList = usm.queryUsageStats(UsageStatsManager.INTERVAL_BEST, startTime, endTime);

    /*Update AppRecentTimeUsedMap with latest data from UsageStatsManager*/
    updateAppRecentTimeUsedMap(usageStatsList,info);

    class RecentUseComparator implements Comparator<ResolveInfo> {
        @Override
        public int compare(ResolveInfo lhs, ResolveInfo rhs) {
            String lhsPackageName=lhs.activityInfo.applicationInfo.packageName;
            String rhsPackageName=rhs.activityInfo.applicationInfo.packageName;
            long lhsUsedTime = getLastUsedTime(lhsPackageName);
            long rhsUsedTime = getLastUsedTime(rhsPackageName);
            return (lhsUsedTime > rhsUsedTime) ? -1 : (lhsUsedTime == rhsUsedTime) ? 0 : 1;
        }

        private long getLastUsedTime(String packageDetails) {
            long appRecentUsedtime = -1;
            if (appRecentTimeUsedMap.containsKey(packageDetails)) {
                appRecentUsedtime = appRecentTimeUsedMap.get(packageDetails);
                }
            return appRecentUsedtime;
        }
    }
    RecentUseComparator mRecentComp = new RecentUseComparator();
    Collections.sort(info, mRecentComp);
    /*Save the updated  LastTimeUsedMap in pref*/
    saveLastTimeUsedMap(lastTimeUsedMap, context);

}

private void updateAppRecentTimeUsedMap(List<UsageStats> usageStatsList,List<ResolveInfo> info){

    String packageName=null;
    if (usageStatsList != null) {
        for (ResolveInfo Rinfo : info) {
            packageName = Rinfo.activityInfo.applicationInfo.packageName;
            boolean added = false;
            for (UsageStats usageStats : usageStatsList) {
                if (packageName.equalsIgnoreCase(usageStats.getPackageName())) {
                    appRecentTimeUsedMap.put(usageStats.getPackageName(), usageStats.getLastTimeUsed());
                    updateLastTimeUsedMap(usageStats.getPackageName(), usageStats.getLastTimeUsed());
                    added=true;
                }
            }
            if (!added && lastTimeUsedMap.containsKey(packageName)) {
                appRecentTimeUsedMap.put(packageName, lastTimeUsedMap.get(packageName));
            }
        }

    }

}

private void updateLastTimeUsedMap(String packageName,Long timeStamp){
    lastTimeUsedMap.put(packageName, timeStamp);
}

/**
 * Return Map containing Package name and recent used time from preference
 *
 * @param context
 * @return Map<String,Long>
 */
private Map<String,Long> loadLastTimeUsedMap(Context context){
    Map<String,Long> outputMap = new HashMap<String,Long>();
    SharedPreferences pSharedPref = context.getSharedPreferences(LAST_TIME_USED_PREFS, Context.MODE_PRIVATE);
    try{
        if (pSharedPref != null){
            String jsonString = pSharedPref.getString(LAST_TIME_USED_MAP, (new JSONObject()).toString());
            JSONObject jsonObject = new JSONObject(jsonString);
            Iterator<String> keysItr = jsonObject.keys();
            while(keysItr.hasNext()) {
                String key = keysItr.next();
                Long value = jsonObject.getLong(key);
                outputMap.put(key, value);
            }
        }
    }catch(Exception e){
        e.printStackTrace();
    }
    return outputMap;
}
/**
 * Save the updated map containing Package name and recent used time in preference
 *
 * @param inputMap
 * @param context
 */
private void saveLastTimeUsedMap(Map<String,Long> inputMap, Context context){
    final SharedPreferences sharedPreferences = context.getSharedPreferences(LAST_TIME_USED_PREFS,Context.MODE_PRIVATE);
    if (sharedPreferences != null){
        JSONObject jsonObject = new JSONObject(inputMap);
        String jsonString = jsonObject.toString();
        final SharedPreferences.Editor editor = sharedPreferences.edit();
        editor.remove(LAST_TIME_USED_MAP).commit();
        editor.putString(LAST_TIME_USED_MAP, jsonString);
        editor.commit();
    }
}