android 怎样将主菜单图标改成按安装时间排序

Posted 2020-09-22

1. 在 LauncherModel.java 中增加例如以下代码, 假设是KK Launcher3 ApplicationInfo要替换为AppInfo
public static final Comparator<ApplicationInfo> getInstallTimeComparator() {
  return new Comparator<ApplicationInfo>() {
            public final int compare(ApplicationInfo a, ApplicationInfo b) {
                return a.firstInstallTime == b.firstInstallTime ?

0 : a.firstInstallTime > b.firstInstallTime ? 1:-1;
            }
        };
 }


 public static class InstallTimeComparator implements Comparator<ResolveInfo> {
  private PackageManager mPackageManager;
  List<ResolveInfo> mapps;
  InstallTimeComparator(PackageManager pm, List<ResolveInfo> apps)
  {
   mPackageManager = pm;
   mapps = apps;
   
  }
 
  public final int compare(ResolveInfo a, ResolveInfo b) {
   String packageNameA = a.activityInfo.applicationInfo.packageName;
   String packageNameB = b.activityInfo.applicationInfo.packageName;
   long firstInstallTimeA = 0, firstInstallTimeB = 0;
   try{
   firstInstallTimeA = mPackageManager.getPackageInfo(packageNameA, 0).firstInstallTime;
   firstInstallTimeB = mPackageManager.getPackageInfo(packageNameB, 0).firstInstallTime;
   }catch(Exception e){
    e.printStackTrace(); 
    return 0;
   }
  return firstInstallTimeA == firstInstallTimeB ?

0 : firstInstallTimeA > firstInstallTimeB ?

1:-1;
  }
 };
 
2. 改动 LauncherModel.java 的 loadAllAppsByBatch() 方法:
将
Collections.sort(apps,new LauncherModel.ShortcutNameComparator(packageManager, mLabelCache));
替换成:
Collections.sort(apps,new InstallTimeComparator(packageManager, apps));
 
3. 改动 AppsCustomizePagedview.java 的 setApps 方法
将
Collections.sort(mApps, LauncherModel.getAppNameComparator());
替换成:
Collections.sort(mApps, LauncherModel.getInstallTimeComparator());
 
4. 系统排序会调用reorderApps方法，因此您在其它条件下也要达到安装时间排序，请在相应的reorderApps方法调用前添加
Collections.sort(mApps, LauncherModel.getInstallTimeComparator());
比如：安装的应用后也想安装新的排序方式排列，须要在AppsCustomizePagedview.java 的 addApps 方法前添加sort的调用