PackageInfo LoadLabel性能下降 [英] PackageInfo LoadLabel slow performance

问题描述

我编码为Android，在那里获得应用程序的标签（实际名称）的应用程序是extremelly缓慢。特别是这个code正在执行实在太差了：

I am coding an app for Android, where getting a label (actual name) of the application is extremelly slow. Particularly this code is performing really badly:

packageInfo.loadLabel(pm);

只是为了给你一些指标。在具有400安装的应用程序的Andr​​oid设备，它会采取不到一秒钟，建成所有应用packagenames列表（com.android *等）。但是，它会采取超过30秒，得到实际名称为每个应用程序。

Just to give you some metrics. On an Android device with 400 installed applications, it'll take less than a second to build a list of all application packagenames (com.android.*, etc..). However, it'll take over 30 seconds to get an actual name for each of the apps.

我已经试过这code为好，但它的pretty的大致相同的结果（很慢）：

I've tried this code as well, but it's pretty much the same result (very slow):

(String)pm.getApplicationLabel(packageInfo);

问：如果应用程序软件包名是已知的（即com.android.htmlviewer），在那里抢到一个应用程序名称（如HTML浏览器）快速的另一种方式。

Question: If application packagename is known (i.e. "com.android.htmlviewer"), is there an alternative way to grab an application name (i.e. "HTML Viewer") quickly?

推荐答案

您可以建立在你的已知的应用程序名称应用程序的数据库，每一个您的应用程序遇到一个新的包时更新。第一次运行，通过将需要一段时间，但在那之后，你可以通过只检查一个或两个包名节省了大量的时间。

You could build a database in your app of "known" application names, and update it every time your app comes across a new package. The first run through will take a while, but after that you could save a lot of time by only checking one or two package names.

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