1.移除Settings首頁所有suggestion項

XXX設備按照客人要求需要移除Settings中所有的suggestion項，比喻：Finish setting up your device，Customize your device等。

修改packages/apps/SettingsIntelligence/src/com/android/settings/intelligence/suggestions/SuggestionParser.java　文件中的getSuggestions方法:

public List<Suggestion> getSuggestions() {final SuggestionListBuilder suggestionBuilder = new SuggestionListBuilder();for (SuggestionCategory category : CATEGORIES) {if (category.isExclusive() && !isExclusiveCategoryExpired(category)) {// If suggestions from an exclusive category are present, parsing is stopped// and only suggestions from that category are displayed. Note that subsequent// exclusive categories are also ignored.// Read suggestion and force ignoreSuggestionDismissRule to be false so the rule// defined from each suggestion itself is used.final List<Suggestion> exclusiveSuggestions =readSuggestions(category, false /* ignoreDismissRule */);exclusiveSuggestions.clear(); // remove all suggestion itemif (!exclusiveSuggestions.isEmpty()) {suggestionBuilder.addSuggestions(category, exclusiveSuggestions);return suggestionBuilder.build();}} else {// Either the category is not exclusive, or the exclusiveness expired so we should// treat it as a normal category.final List<Suggestion> suggestions =readSuggestions(category, true /* ignoreDismissRule */);suggestions.clear(); //remove all suggestion itemsuggestionBuilder.addSuggestions(category, suggestions);}}return suggestionBuilder.build();}

2.解決Settings中search results前面的null level

使用settings中的 search功能時，在搜索的結果中最前面多一個null level。修改:packages/apps/SettingsIntelligence/src/com/android/settings/intelligence/search/sitemap/SiteMapManager.java 文件中的buildBreadCrumb 方法.

  public synchronized List<String> buildBreadCrumb(Context context, String clazz,String screenTitle) {init(context);final long startTime = System.currentTimeMillis();final List<String> breadcrumbs = new ArrayList<>();if (!mInitialized) {Log.w(TAG, "SiteMap is not initialized yet, skipping");return breadcrumbs;}breadcrumbs.add(screenTitle);String currentClass = clazz;String currentTitle = screenTitle;// Look up current page's parent, if found add it to breadcrumb string list, and repeat.while (true) {final SiteMapPair pair = lookUpParent(currentClass, currentTitle);//檢測parent title是否爲空，爲空不添加if (pair == null || pair.getParentTitle() == null) {if (DEBUG_TIMING) {Log.d(TAG, "BreadCrumb timing: " + (System.currentTimeMillis() - startTime));}return breadcrumbs;}breadcrumbs.add(0, pair.getParentTitle());currentClass = pair.getParentClass();currentTitle = pair.getParentTitle();}}

3.Settings 获取app存储大小

设置里面的app信息里面存储里面的app Size对应stats.codeSize. 读取流程如下：

StorageStatsService.queryStatsForPackage-->StorageStatsService.queryStatsForUid -->Installer.getAppSize -→InstalldNativeService.cpp

frameworks/base/services/usage/java/com/android/server/usage/StorageStatsService.java

frameworks/base/services/core/java/com/android/server/pm/Installer.java

frameworks/native/cmds/installd/InstalldNativeService.cpp

如果想debug InstallNatvieService文件中读取大小的时候是否有错误,则需要enable MEASURE_DEBUG, 打开方式为设定“frameworks/native/cmds/installd/utils.h“文件中的MEASURE_DEBUG为1。

InstalldNativeService文件中的getAppSize方法里面“calculate_tree_size“这个是在” frameworks/native/cmds/installd/utils.cpp”文件中实现.