Android13-Launcer3_按安装时间顺序排列

系统默认按名称进行排列

Launcher3/src/com/android/launcher3/allapps/AllAppsRecyclerView.java

AllAppsRecyclerView

继承自FastScrollRecyclerView

    
    protected AlphabeticalAppsList<?> mApps;

		public void setApps(AlphabeticalAppsList<?> apps) {
        mApps = apps;
    }

AlphabeticalAppsList

Launcher3/src/com/android/launcher3/allapps/AlphabeticalAppsList.java

public class AlphabeticalAppsList<T extends Context & ActivityContext> implements
        AllAppsStore.OnUpdateListener {

    private AppInfoComparator mAppNameComparator;

		@Override
    public void onAppsUpdated() {
        if (mAllAppsStore == null) {
            return;
        }
        // Sort the list of apps
        mApps.clear();

        Stream<AppInfo> appSteam = Stream.of(mAllAppsStore.getApps());
        if (!hasSearchResults() && mItemFilter != null) {
            appSteam = appSteam.filter(mItemFilter);
        }
        appSteam = appSteam.sorted(mAppNameComparator);

        // As a special case for some languages (currently only Simplified Chinese), we may need to
        // coalesce sections
        Locale curLocale = mActivityContext.getResources().getConfiguration().locale;
        boolean localeRequiresSectionSorting = curLocale.equals(Locale.SIMPLIFIED_CHINESE);
        if (localeRequiresSectionSorting) {
            // Compute the section headers. We use a TreeMap with the section name comparator to
            // ensure that the sections are ordered when we iterate over it later
            appSteam = appSteam.collect(Collectors.groupingBy(
                    info -> info.sectionName,
                    () -> new TreeMap<>(new LabelComparator()),
                    Collectors.toCollection(ArrayList::new)))
                    .values()
                    .stream()
                    .flatMap(ArrayList::stream);
        }

        appSteam.forEachOrdered(mApps::add);
        // Recompose the set of adapter items from the current set of apps
        if (mSearchResults.isEmpty()) {
            updateAdapterItems();
        }
    }

AlphabeticalAppsList在更新时会调用appSteam.sorted(mAppNameComparator)进行排序，接着看

AppInfoComparator

Launcher3/src/com/android/launcher3/allapps/AppInfoComparator.java

AppInfoComparator

    @Override
    public int compare(AppInfo a, AppInfo b) {
        // Order by the title in the current locale
        int result = mLabelComparator.compare(
                a.title == null ? "" : a.title.toString(),
                b.title == null ? "" : b.title.toString());
        if (result != 0) {
            return result;
        }

        // If labels are same, compare component names
        result = a.componentName.compareTo(b.componentName);
        if (result != 0) {
            return result;
        }

        if (mMyUser.equals(a.user)) {
            return -1;
        } else {
            Long aUserSerial = mUserManager.getSerialNumberForUser(a.user);
            Long bUserSerial = mUserManager.getSerialNumberForUser(b.user);
            return aUserSerial.compareTo(bUserSerial);
        }
    }

compaire()方法的逻辑修改为安装时间

    @Override
    public int compare(AppInfo a, AppInfo b) {

        int result = 0;
        //按安装时间进行排序
        long aFirstInstallTime = getFirstInstallTime(a);
        long bFirstInstallTime = getFirstInstallTime(b);

        if(aFirstInstallTime < bFirstInstallTime){
            result = 1;
        }else if(aFirstInstallTime == bFirstInstallTime){
            result = 0;
        }else {
            result = -1;
        }
        if(result !=0){
            return result;
        }
        //保留之前的逻辑
        // Order by the title in the current locale
        result = mLabelComparator.compare(
                a.title == null ? "" : a.title.toString(),
                b.title == null ? "" : b.title.toString());
        if (result != 0) {
            return result;
        }

        // If labels are same, compare component names
        result = a.componentName.compareTo(b.componentName);
        if (result != 0) {
            return result;
        }

        if (mMyUser.equals(a.user)) {
            return -1;
        } else {
            Long aUserSerial = mUserManager.getSerialNumberForUser(a.user);
            Long bUserSerial = mUserManager.getSerialNumberForUser(b.user);
            return aUserSerial.compareTo(bUserSerial);
        }
    }

    private long getFirstInstallTime(AppInfo a) {
        long firstInstallTime = 0;
        try {
            PackageManager packageManager = mContext.getPackageManager();
            PackageInfo packageInfo = packageManager.getPackageInfo(a.componentName.getPackageName(), 0);
            firstInstallTime = packageInfo.firstInstallTime;
        } catch (PackageManager.NameNotFoundException e) {
            throw new RuntimeException(e);
        }
        return  firstInstallTime;
    }

调整后