[FAQ08556]如何将主菜单图标改成按安装时间排序

[DESCRIPTION]

Launcher主菜单图标默认是按名称来排序的，如何将主菜单改成按安装时间来排序？

[SOLUTION]

M：

  1. 参考AppNameComparator.java新增：AppInstallTimeComparator.java；

  2. 在AlphabeticalAppsList.java新增变量：

    1. private AppInstallTimeComparator mAppInstallTimeComparator;

  3. 修改AlphabeticalAppsList.java 的构造函数：

    1. mAppNameComparator = new AppNameComparator(context);
    2. // 替换成:
    3. mAppInstallTimeComparator= new AppInstallTimeComparator(context);

  4. 修改AlphabeticalAppsList.java 的 onAppsUpdated() 方法：

    1. Collections.sort(mApps, mAppNameComparator.getAppInfoComparator());
    2. // 替换成:
    3. Collections.sort(mApps, mAppInstallTimeComparator.getAppInstallTimeComparator());

  5. 修改AlphabeticalAppsList.java 的 onAppsUpdated() 方法：

    1. sectionMap = new TreeMap<>(mAppNameComparator.getSectionNameComparator());
    2. // 替换成:
    3. sectionMap = new TreeMap<>(mAppInstallTimeComparator.getSectionNameComparator());

L以前版本：

  1. 在 LauncherModel.java 中加入如下方法： ```java public static final Comparator getInstallTimeComparator() { return new Comparator() { public final int compare(AppInfo a, AppInfo b) {
    1.  return a.firstInstallTime == b.firstInstallTime ? 0 : a.firstInstallTime > b.firstInstallTime ? 1:-1;
    } }; }

public static class InstallTimeComparator implements Comparator {

  1. private PackageManager mPackageManager;
  2. List<ResolveInfo> mapps;
  4. InstallTimeComparator(PackageManager pm, List<ResolveInfo> apps) {
  5.     mPackageManager = pm;
  6.     mapps = apps;
  7. }
  10. public final int compare(ResolveInfo a, ResolveInfo b) {
  11.     String packageNameA = a.activityInfo.applicationInfo.packageName;
  12.     String packageNameB = b.activityInfo.applicationInfo.packageName;
  13.     long firstInstallTimeA = 0, firstInstallTimeB = 0;
  14.     try{
  15.         firstInstallTimeA = mPackageManager.getPackageInfo(packageNameA, 0).firstInstallTime;
  16.         firstInstallTimeB = mPackageManager.getPackageInfo(packageNameB, 0).firstInstallTime;
  17.     }catch(Exception e){
  18.         e.printStackTrace(); 
  19.         return 0;
  20.     }
  21.     return firstInstallTimeA == firstInstallTimeB ? 0 : firstInstallTimeA > firstInstallTimeB ? 1:-1;
  22. }

};

  2. 2. 修改 LauncherModel.java 的 loadAllAppsByBatch() 方法：
  3. ```java
  4. Collections.sort(apps,new LauncherModel.ShortcutNameComparator(packageManager, mLabelCache));
  5. // 替换成:
  6. Collections.sort(apps,new InstallTimeComparator(packageManager, apps));

  1. 修改 AppsCustomizePagedview.java 的 setApps 方法

    1. Collections.sort(mApps, LauncherModel.getAppNameComparator());
    2. // 替换成:
    3. Collections.sort(mApps, LauncherModel.getInstallTimeComparator());

  2. reorderApps()在某些条件下会被调用，如果要求在那些条件下也要达到按照安装时间排序，请在调用reorderApps方法前增加

    1. Collections.sort(mApps, LauncherModel.getInstallTimeComparator());

例如：新安装应用后仍然要按照安装时间排序，需要在AppsCustomizePagedview.java的addApps方法中增加sort的调用。如下：

[转][M][Launcher]主菜单图标改成时间排序 - 图1