Android 8.1去掉Settings二级菜单中的Cast、Print模块

packages/apps/Settings/src/com/android/settings/dashboard/DashboardFragment.java

1、去掉CAST 修改

private boolean isEnableWifiDisplay = false;
 @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        mDashboardFeatureProvider =
                FeatureFactory.getFactory(context).getDashboardFeatureProvider(context);
        mProgressiveDisclosureMixin = mDashboardFeatureProvider
                .getProgressiveDisclosureMixin(context, this, getArguments());
        getLifecycle().addObserver(mProgressiveDisclosureMixin);

		//add zhanghao for invisible CAST
        //isEnableWifiDisplay = context.getResources().getBoolean(com.android.internal.R.bool.config_enableWifiDisplay);
		//end 
        List<AbstractPreferenceController> controllers = getPreferenceControllers(context);
        if (controllers == null) {
            controllers = new ArrayList<>();
        }
        mPlaceholderPreferenceController =
                new DashboardTilePlaceholderPreferenceController(context);
        controllers.add(mPlaceholderPreferenceController);
        for (AbstractPreferenceController controller : controllers) {
            addPreferenceController(controller);
        }
    }

2、去掉打印模块修改

 /**
     * Refresh preference items backed by DashboardCategory.
     */
    @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
    void refreshDashboardTiles(final String TAG) {
        final PreferenceScreen screen = getPreferenceScreen();

        final DashboardCategory category =
                mDashboardFeatureProvider.getTilesForCategory(getCategoryKey());
        if (category == null) {
            Log.d(TAG, "NO dashboard tiles for " + TAG);
            return;
        }
        List<Tile> tiles = category.tiles; 
        if (tiles == null) {
            Log.d(TAG, "tile list is empty, skipping category " + category.title);
            return;
        }
        // Create a list to track which tiles are to be removed.
        final List<String> remove = new ArrayList<>(mDashboardTilePrefKeys);

        // There are dashboard tiles, so we need to install SummaryLoader.
        if (mSummaryLoader != null) {
            mSummaryLoader.release();
        }
        final Context context = getContext();
        mSummaryLoader = new SummaryLoader(getActivity(), getCategoryKey());
        mSummaryLoader.setSummaryConsumer(this);
        final TypedArray a = context.obtainStyledAttributes(new int[]{
                android.R.attr.colorControlNormal});
        final int tintColor = a.getColor(0, context.getColor(android.R.color.white));
        a.recycle();
        final boolean isOwner = (UserHandle.myUserId() == UserHandle.USER_OWNER);
        // Install dashboard tiles.
        for (Tile tile : tiles) {
            final String key = mDashboardFeatureProvider.getDashboardKeyForTile(tile);
            if (!isOwner) {
                if (key.endsWith(DevelopmentSettingsActivity.class.getSimpleName())
                    || key.endsWith(NotificationAppListActivity.class.getSimpleName())) {
                    continue;
                }
            }
            if (key.endsWith(SimSettingsActivity.class.getSimpleName()) && !isOwner) {
                continue;
            }
			//add zhanghao for invisible Print
			 if (key.equals("dashboard_tile_pref_com.android.settings.Settings$PrintSettingsActivity")) {
                continue;
            }
			//end
            if (TextUtils.isEmpty(key)) {
                Log.d(TAG, "tile does not contain a key, skipping " + tile);
                continue;
            }
            if (!displayTile(tile)) {
                continue;
            }
            Log.d(TAG, "isEnableWifiDisplay = " + isEnableWifiDisplay + "; isContainsWifiDisplay(key) = " + isContainsWifiDisplay(key));
            if (!isEnableWifiDisplay || Utils.WCN_DISABLED) {
                if (isContainsWifiDisplay(key)) {
                    continue;
                }
            }
            if (tintTileIcon(tile)) {
                tile.icon.setTint(tintColor);
            }
            if (mDashboardTilePrefKeys.contains(key)) {
                // Have the key already, will rebind.
                final Preference preference = mProgressiveDisclosureMixin.findPreference(
                        screen, key);
                mDashboardFeatureProvider.bindPreferenceToTile(getActivity(), getMetricsCategory(),
                        preference, tile, key, mPlaceholderPreferenceController.getOrder());
            } else {
                // Don't have this key, add it.
                final Preference pref = new Preference(getPrefContext());
                mDashboardFeatureProvider.bindPreferenceToTile(getActivity(), getMetricsCategory(),
                        pref, tile, key, mPlaceholderPreferenceController.getOrder());
                mProgressiveDisclosureMixin.addPreference(screen, pref);
                mDashboardTilePrefKeys.add(key);
            }
            remove.remove(key);
        }
        // Finally remove tiles that are gone.
        for (String key : remove) {
            mDashboardTilePrefKeys.remove(key);
            mProgressiveDisclosureMixin.removePreference(screen, key);
        }
        mSummaryLoader.setListening(true);
    }