检测是新安装还是更新版本(Android应用) [英] Detect if new install or updated version (Android app)

问题描述

我在Play商店中有一个应用.我要提出一个要求，如果用户要使用应用程序的特定部分，则必须先邀请朋友才能使用.但我只想将此限制强加给新安装的应用程序(对在限制之前已安装了该应用程序的用户来说是公平的). 很长的介绍很抱歉，我的问题是如何确定当前设备是否已更新该应用程序或是新安装?

I have an app on the Play Store. I want to put a requirement that if users want to use a certain part of the app, they have to invite a friend before being able to do so. But I only want to impose this restriction to new installs of the app (to be fair to users that have installed the app before the restriction). Sorry for the long intro, my question is how can I find out if the current device has updated the app or is a new install?

推荐答案

public static boolean isFirstInstall() {
    try {
        long firstInstallTime =   App.getContext().getPackageManager().getPackageInfo(getPackageName(), 0).firstInstallTime;
        long lastUpdateTime = App.getContext().getPackageManager().getPackageInfo(getPackageName(), 0).lastUpdateTime;
        return firstInstallTime == lastUpdateTime;
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
        return true;
    }
}



public static boolean isInstallFromUpdate() {
    try {
        long firstInstallTime =   App.getContext().getPackageManager().getPackageInfo(getPackageName(), 0).firstInstallTime;
        long lastUpdateTime = App.getContext().getPackageManager().getPackageInfo(getPackageName(), 0).lastUpdateTime;
        return firstInstallTime != lastUpdateTime;
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
        return false;
    }
}

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