Method update

app/src/main/java/eu/faircode/email/Shortcuts.java:68–170

(final Context context, final LifecycleOwner owner)

    private static final int MAX_SHORTCUTS = 4;

    static void update(final Context context, final LifecycleOwner owner) {
        if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.N_MR1)
            return;

        new SimpleTask<List<ShortcutInfoCompat>>() {
            @Override
            @TargetApi(Build.VERSION_CODES.N_MR1)
            protected List<ShortcutInfoCompat> onExecute(Context context, Bundle args) {
                SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
                boolean enabled = prefs.getBoolean("shortcuts", true);

                ShortcutManager sm = Helper.getSystemService(context, ShortcutManager.class);
                int app = sm.getMaxShortcutCountPerActivity();
                int manifest = sm.getManifestShortcuts().size();
                int count = Math.min(app - manifest, MAX_SHORTCUTS);
                EntityLog.log(context, "Shortcuts count=" + count +
                        " app=" + app + " manifest=" + manifest + " enabled=" + enabled);

                List<ShortcutInfoCompat> shortcuts = new ArrayList<>();
                if (!enabled)
                    return shortcuts;

                DB db = DB.getInstance(context);
                List<String> emails = new ArrayList<>();
                try (Cursor cursor = db.contact().getFrequentlyContacted()) {
                    int colEmail = cursor.getColumnIndex("email");
                    int colName = cursor.getColumnIndex("name");
                    int colAvatar = cursor.getColumnIndex("avatar");
                    while (shortcuts.size() < count && cursor.moveToNext()) {
                        String email = cursor.getString(colEmail);
                        String name = (cursor.isNull(colName) ? null : cursor.getString(colName));
                        String avatar = (cursor.isNull(colAvatar) ? null : cursor.getString(colAvatar));

                        if (emails.contains(email))
                            continue;
                        emails.add(email);

                        EntityLog.log(context, "Shortcut email=" + email);
                        ShortcutInfoCompat.Builder builder = getShortcut(context, email, name, avatar);
                        builder.setLongLived(true);
                        builder.setRank(shortcuts.size() + 1);
                        shortcuts.add(builder.build());
                    }
                }

                return shortcuts;
            }

            @Override
            @TargetApi(Build.VERSION_CODES.N_MR1)
            protected void onExecuted(Bundle args, List<ShortcutInfoCompat> shortcuts) {
                List<ShortcutInfoCompat> add = new ArrayList<>();
                List<String> remove = new ArrayList<>();

                if (BuildConfig.DEBUG && false)
                    ShortcutManagerCompat.removeAllDynamicShortcuts(context.getApplicationContext());

                List<ShortcutInfoCompat> existing = ShortcutManagerCompat.getDynamicShortcuts(context.getApplicationContext());