Android:获取每个活动花费的时间 [英] Android: Get Time Spent Per Activity

问题描述

首先，我不是在寻找在给定应用程序上花费的时间. 在AOSP frameworks/base/services/java/com/android/server/am/UsageStatsService.java中已经存在用于此目的的应用程序"，com.android.settings/.UsageStats和大量支持代码.

Firstly, I'm not looking for time spent on a given application. There is already "an app for that", com.android.settings/.UsageStats, and a good deal of supporting code in the AOSP frameworks/base/services/java/com/android/server/am/UsageStatsService.java, etc.

到目前为止，我检查过的代码似乎并未记录在特定<activity> s 上花费的时间.我曾想过以两种方式获取此信息，但是我觉得必须有一些更干净，更简单的东西，可以利用更多现有代码.这些想法是:

The code that I've examined so far does not seem to record elapsed time spent on particular <activity>s. I have thought to get this information two ways, but feel there must be something cleaner and simpler, that leverages more existing code. The ideas have been:

1. 插入基类Activity和onResume()，以破解时间戳，并将信息记录到某个位置(可能是SQLite数据库).
2. 插入Context类，以便在每次调用startActivity()和朋友时记录下来.

1. Instrument the base Activity class onPause() and onResume(), to hack in a timestamp, and log the info some place (probably a SQLite database.)
2. Instrument the Context class, to make note whenever startActivity() and friends are called.

那么，您认为呢?还有什么比那些选择更好的呢?预先谢谢你！

So what do you think -- anything better than those options? Thank you in advance!

推荐答案

那么，您认为呢?有什么比那些选择更好的了?

So what do you think -- anything better than those options?

任何事情都比#2更好，后者需要自定义固件.

Anything is better than #2, which requires custom firmware.

#1是向下AFAIK上API级别13的SDK中的唯一选项.

#1 is your only option within the SDK for API Level 13 on down AFAIK.

API级别14(又称为Android 4.0)，您可以通过在Application(例如，getApplicationContext())上调用的registerActivityLifecycleCallbacks()进行注册.我还没有使用过这些，但是看来您可以安排一个单独的侦听器来通知即将发生的活动，从而避免强迫您使用所需的日志记录扩展某些常见的Activity基类.

API Level 14 (a.k.a., Android 4.0) added in Application.ActivityLifecycleCallbacks, which you can register via registerActivityLifecycleCallbacks() called on your Application (e.g., getApplicationContext()). I haven't used these yet, but it would appear that you can arrange for a single listener to be notified of activities coming and going, avoiding forcing you to extend some common base Activity class with your desired logging.

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