设置的一级菜单图标添加背景

设置中的一级菜单加载主要由DashboardFragment加载

第三方菜单加载(DashboardFeatureProviderImpl):

@Overridepublic List<DynamicDataObserver> bindPreferenceToTileAndGetObservers(FragmentActivity activity,boolean forceRoundedIcon, int sourceMetricsCategory, Preference pref, Tile tile,String key, int baseOrder) {if (pref == null) {return null;}if (!TextUtils.isEmpty(key)) {pref.setKey(key);} else {pref.setKey(getDashboardKeyForTile(tile));}final List<DynamicDataObserver> outObservers = new ArrayList<>();DynamicDataObserver observer = bindTitleAndGetObserver(pref, tile);if (observer != null) {outObservers.add(observer);}observer = bindSummaryAndGetObserver(pref, tile);if (observer != null) {outObservers.add(observer);}observer = bindSwitchAndGetObserver(pref, tile);if (observer != null) {outObservers.add(observer);}bindIcon(pref, tile, forceRoundedIcon);if (tile instanceof ActivityTile) {final Bundle metadata = tile.getMetaData();String clsName = null;String action = null;if (metadata != null) {clsName = metadata.getString(SettingsActivity.META_DATA_KEY_FRAGMENT_CLASS);action = metadata.getString(META_DATA_KEY_INTENT_ACTION);}if (!TextUtils.isEmpty(clsName)) {pref.setFragment(clsName);} else {final Intent intent = new Intent(tile.getIntent());intent.putExtra(MetricsFeatureProvider.EXTRA_SOURCE_METRICS_CATEGORY,sourceMetricsCategory);if (action != null) {intent.setAction(action);}pref.setOnPreferenceClickListener(preference -> {launchIntentOrSelectProfile(activity, tile, intent, sourceMetricsCategory);return true;});}}if (tile.hasOrder()) {final String skipOffsetPackageName = activity.getPackageName();final int order = tile.getOrder();boolean shouldSkipBaseOrderOffset = TextUtils.equals(skipOffsetPackageName, tile.getIntent().getComponent().getPackageName());if (shouldSkipBaseOrderOffset || baseOrder == Preference.DEFAULT_ORDER) {pref.setOrder(order);} else {pref.setOrder(order + baseOrder);}}return outObservers.isEmpty() ? null : outObservers;}

bindIcon()方法就是为第三方菜单添加背景的：

@VisibleForTestingvoid bindIcon(Preference preference, Tile tile, boolean forceRoundedIcon) {if (tile.getMetaData() != null&& tile.getMetaData().containsKey(META_DATA_PREFERENCE_ICON_URI)) {// Set a transparent color before starting to fetch the real icon, this is necessary// to avoid preference padding change.&& tile.getMetaData().containsKey(META_DATA_PREFERENCE_ICON_URI)));setPreferenceIcon(preference, tile, forceRoundedIcon, mContext.getPackageName(),Icon.createWithResource(mContext, android.R.color.transparent));ThreadUtils.postOnBackgroundThread(() -> {final Intent intent = tile.getIntent();String packageName = null;if (!TextUtils.isEmpty(intent.getPackage())) {packageName = intent.getPackage();} else if (intent.getComponent() != null) {packageName = intent.getComponent().getPackageName();}final Map<String, IContentProvider> providerMap = new ArrayMap<>();final Uri uri = TileUtils.getCompleteUri(tile, META_DATA_PREFERENCE_ICON_URI,METHOD_GET_PROVIDER_ICON);final Pair<String, Integer> iconInfo = TileUtils.getIconFromUri(mContext, packageName, uri, providerMap);if (iconInfo == null) {return;}final Icon icon = Icon.createWithResource(iconInfo.first, iconInfo.second);ThreadUtils.postOnMainThread(() -> {setPreferenceIcon(preference, tile, forceRoundedIcon, iconInfo.first, icon);});});return;}// Use preference context instead here when get icon from Tile, as we are using the context// to get the style to tint the icon. Using mContext here won't get the correct style.final Icon tileIcon = tile.getIcon(preference.getContext());if (tileIcon == null) {return;}setPreferenceIcon(preference, tile, forceRoundedIcon, tile.getPackageName(), tileIcon);}

代码中我们可以看到，setPreferenceIcon()会为菜单图标添加背景颜色

 private void setPreferenceIcon(Preference preference, Tile tile, boolean forceRoundedIcon,String iconPackage, Icon icon) {Drawable iconDrawable = icon.loadDrawable(preference.getContext());Boolean flag = mContext.getResources().getBoolean(R.bool.config_menu_icons_background);if (!flag&&TextUtils.equals(tile.getCategory(), CategoryKey.CATEGORY_HOMEPAGE)) {iconDrawable.setTint(Utils.getHomepageIconColor(preference.getContext()));} else if (flag&&forceRoundedIcon && !TextUtils.equals(mContext.getPackageName(),iconPackage)) {iconDrawable = new AdaptiveIcon(mContext, iconDrawable,R.dimen.dashboard_tile_foreground_image_inset);((AdaptiveIcon) iconDrawable).setBackgroundColor(mContext, tile);}preference.setIcon(iconDrawable);}

本地菜单图标数据加载TopLevelSettings.java中的onCreatePreferences方法进行加载

 @Overridepublic void onCreatePreferences(Bundle savedInstanceState, String rootKey) {super.onCreatePreferences(savedInstanceState, rootKey);  setBackgroundForIcon();}

在onCreatePreferences中通过setBackgroundForIcon方法去设置图标

private void setBackgroundForIcon(){Context mContext = getContext();    final PreferenceScreen screen = getPreferenceScreen();if (screen == null) {return;}// Tint the homepage iconsfinal int tintColor = Utils.getHomepageIconColor(mContext);final int count = screen.getPreferenceCount();Random r=new Random();int array[]= {R.color.homepage_network_background,R.color.homepage_connected_device_background,R.color.homepage_app_and_notification_background,R.color.homepage_battery_background,R.color.homepage_display_background,R.color.homepage_sound_background,R.color.homepage_storage_background,R.color.homepage_security_background,R.color.homepage_accounts_background,R.color.homepage_accessibility_background,R.color.homepage_emergency_background,R.color.homepage_system_background,R.color.homepage_support_background,R.color.homepage_generic_icon_background,R.color.homepage_location_background,R.color.homepage_about_background,R.color.homepage_privacy_background,R.color.homepage_wallpaper_background,R.color.homepage_notification_background};for (int i = 0; i < count; i++) {final Preference preference = screen.getPreference(i);if (preference == null) {break;}Drawable icon = preference.getIcon();           if (icon != null) {if(mContext.getResources().getBoolean(R.bool.config_menu_icons_background)){icon.setTint(0xffffffff);              icon = new AdaptiveIcon(mContext, icon);  int index = i<array.length? i:r.nextInt(array.length);((AdaptiveIcon) icon).setBackgroundColor(mContext.getColor(array[index]));          }else{  icon.setTint(tintColor);  }preference.setIcon(icon);  }}}

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设置的一级菜单图标添加背景

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