如何整理List< PackageInfo>在android ..？ [英] How to sort out a List<PackageInfo> in android..?

问题描述

List<PackageInfo> pkginfoList = getPackageManager()
                .getInstalledPackages(0);

如何排序 PackageInfo ，我做了 ApplicationInfo 运行正常

How to Sort the PackageInfo, i did ApplicationInfo thats working fine

Collections.sort(installedList, new ApplicationInfo.DisplayNameComparator(packageManager));

但我想实现 PackageInfo 也..

我不知道怎么做..请任何人帮助我......！

i'm not sure how to do.. Please any one help me...!

推荐答案

Collections.sort 方法有两个参数：

1. 列表你想要排序


2. 并且比较器对象，用于比较类型是列表中元素类型的元素。

1. The list you want to sort
2. And a Comparator object used to compare elements which type is the type of elements in your list.

在您的情况下你想实现一个比较器< PackageInfo> 。假设 PackagInfo 的示例有一个 getName（）方法：

In your case you want to implement a Comparator<PackageInfo>. An example supposing a PackagInfo has a getName() method:

new Comparator<PackagInfo>() {
    @Override
    public int compare(PackagInfo arg0, PackagInfo arg1) {
      return arg0.getName().compareTo(arg1.getName());
    }
 };

另一个解决方案是从某处获得一个，但我不熟悉Android。查看您提供的代码段，也许您有一个PackageInfo.xxxx静态字段，其类型为 Comparator< PackageInfo> ？

Another solution is to get one from somewhere but I don't know Android well. Looking at the piece of code you provided, maybe you have a PackageInfo.xxxx static field which type is Comparator<PackageInfo> ?

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