确定日期（或版本）的应用程序从谷歌Play商店购买 - iOS设备appStoreReceiptURL等效 [英] Determine date (or version) that app was purchased from Google Play Store - equivalent of iOS appStoreReceiptURL

问题描述

我想确定我的Andr​​oid版本应用程式最初是从谷歌购买的用户Play商店。我需要这个信息，以帮助支持付费应用模式转向免费增值模式。

I'd like to determine which version of my Android app a user originally purchased from the Google Play Store. I need this info to help support moving from a paid app model to a freemium model.

在iOS7起，您可以通过使用做到这一点 [一个NSBundle appStoreReceiptURL] 返回App Store的收据，可以检查的URL。

In iOS7 onwards, you can do this by using [NSBundle appStoreReceiptURL] which returns a URL of the App Store receipt that can be examined.

有没有在谷歌API的等效？

Is there an equivalent in the Google APIs?

推荐答案

您可以通过使用获得的时间和第一次安装应用程序的日期

---

Getting Time and Date Install

---

You can get the time and date of the first install of the app by using

long installTime = context.getPackageManager()
                   .getPackageInfo("com.some.package.name", 0)
                   .firstInstallTime;

以及版本与

PackageInfo pInfo = getPackageManager().getPackageInfo(getPackageName(), 0);
version = pInfo.versionName;

不幸的是，每当应用程序被卸载并重新安装该日期将重置。

Unfortunately this date will reset whenever the app is uninstalled and reinstalled.

如果你去

PackageManager pm = context.getPackageManager();
ApplicationInfo appInfo = pm.getApplicationInfo("app.package.name", 0);
String appFile = appInfo.sourceDir;
long installed = new File(appFile).lastModified();

您还会发现出的当应用程序被安装日期的，但是回来的时候每包更新时会发生变化。

you will also find out the date when an application was installed, but the time returned will change every time the package is updated.

一个解决方案可能是您的应用程序，在那里你可以存储每个用户ID 使用的 AccountPicker ，其首次安装与方法如上所述，在登录使用它们。您也可以使用应用授权服​​务。

A solution could be an online database for your application, where you can store each user's ID using AccountPicker, their first-time-install with the methods described above and use them at login. You can also use the App Licensing Service.

的http://developer.android.com/reference/android/content/pm/PackageInfo.html#firstInstallTime

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