设置中的菜单主要分为两种添加方式：
``

1.静态加载

所谓自主添加，就是通过xml文件，自主通过添加布局到Fragment、Activity等加载到设置菜单中。一般每个自主添加菜单都拥有一个Controller。主要分为以下两种情况处理：

1.拥有Conroller

@Override
     public boolean isAvailable() {
        return false;
     } // 通过继承类往上查找，发现实际上去除布局的方式仍然是调用了removePreference函数来删除控件

2.没有Controller

@Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle)
        final PreferenceScreen screen = getPreferenceScreen();
        Preference backupPref = screen.findPreference("backup_settings");
        screen.removePreference(backupPref);
      }

2.动态加载

所谓动态加载，就是说菜单不是通过xml文件自主定义添加的内容，而是通过Category来动态加载布置在各个应用下的菜单页面。

vendor

vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/notification/SoundSettings.java

public class SoundSettings extends DashboardFragment implements OnActivityResultListener {
    private static final String TAG = "SoundSettings";
      ......
}

vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/dashboard/DashboardFragment.java

@VisibleForTesting
    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;
        }
        final List<Tile> tiles = category.getTiles();
        if (tiles == null) {
            Log.d(TAG, "tile list is empty, skipping category " + category.key);
            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);
        // Install dashboard tiles.
        final boolean forceRoundedIcons = shouldForceRoundedIcon();
        for (Tile tile : tiles) {
            final String key = mDashboardFeatureProvider.getDashboardKeyForTile(tile);
            if (TextUtils.isEmpty(key)) {
                Log.d(TAG, "tile does not contain a key, skipping " + tile);
                continue;
            }
            if (!displayTile(tile)) {
                continue;
            }
            if (mDashboardTilePrefKeys.contains(key)) {
                // Have the key already, will rebind.
                final Preference preference = screen.findPreference(key);
                mDashboardFeatureProvider.bindPreferenceToTile(getActivity(), forceRoundedIcons,
                        getMetricsCategory(), preference, tile, key,
                        mPlaceholderPreferenceController.getOrder());
            } else {
                // Don‘t have this key, add it.
                final Preference pref = new Preference(getPrefContext());
                mDashboardFeatureProvider.bindPreferenceToTile(getActivity(), forceRoundedIcons,
                        getMetricsCategory(), pref, tile, key,
                        mPlaceholderPreferenceController.getOrder());
                screen.addPreference(pref);
                mDashboardTilePrefKeys.add(key);
            }
            remove.remove(key);
        }
        // Finally remove tiles that are gone.
        for (String key : remove) {
            mDashboardTilePrefKeys.remove(key);
            final Preference preference = screen.findPreference(key);
            if (preference != null) {
                screen.removePreference(preference);
            }
        }
        mSummaryLoader.setListening(true);
    }

vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/dashboard/DashboardFragmentRegistry.java

        PARENT_TO_CATEGORY_KEY_MAP.put(AppAndNotificationDashboardFragment.class.getName(),
                CategoryKey.CATEGORY_APPS);
        PARENT_TO_CATEGORY_KEY_MAP.put(PowerUsageSummary.class.getName(),
                CategoryKey.CATEGORY_BATTERY);
        PARENT_TO_CATEGORY_KEY_MAP.put(DisplaySettings.class.getName(),
                CategoryKey.CATEGORY_DISPLAY);
        PARENT_TO_CATEGORY_KEY_MAP.put(SoundSettings.class.getName(),
                CategoryKey.CATEGORY_SOUND);
        PARENT_TO_CATEGORY_KEY_MAP.put(StorageDashboardFragment.class.getName(),
                CategoryKey.CATEGORY_STORAGE);
        PARENT_TO_CATEGORY_KEY_MAP.put(SecuritySettings.class.getName(),
                CategoryKey.CATEGORY_SECURITY);
        PARENT_TO_CATEGORY_KEY_MAP.put(AccountDetailDashboardFragment.class.getName(),
                CategoryKey.CATEGORY_ACCOUNT_DETAIL);
        PARENT_TO_CATEGORY_KEY_MAP.put(AccountDashboardFragment.class.getName(),
                CategoryKey.CATEGORY_ACCOUNT);

frameworks

frameworks/base/packages/SettingsLib/src/com/android/settingslib/drawer/CategoryKey.java

public static final String CATEGORY_STORAGE = "com.android.settings.category.ia.storage";
public static final String CATEGORY_SECURITY = "com.android.settings.category.ia.security";

packages

packages/apps/Car/Settings/res/xml/sound_settings_fragment.xml

    <com.android.car.settings.common.LogicalPreferenceGroup
        android:key="@string/pk_sounds_extra_settings"
        settings:controller="com.android.car.settings.common.ExtraSettingsPreferenceController">
        <intent android:action="com.android.settings.action.EXTRA_SETTINGS">
            <extra android:name="com.android.settings.category"
                   android:value="com.android.settings.category.ia.sound"/>
        </intent>

Android修改分析：删除设置中菜单