Introduction

If you are a developer, you may be wondering how to check if a user has installed an app on their device. This is an important question to consider, as it can help you determine the success of your app and how to best reach your users. In this article, we will discuss how to check if a user has installed an app, as well as some tips for improving user engagement. We will also discuss some of the potential pitfalls of this process and how to avoid them. By the end of this article, you should have a better understanding of how to check if a user has installed an app and how to use this information to improve your app’s success.

Solution

You can check if the user has installed an app by using the PackageManager class. This class provides methods to query the system for installed packages and their associated information. You can use the getInstalledPackages() method to get a list of all installed packages and then check if the app you are looking for is in the list.

private boolean checkThisApp(String uri) {
    PackageManager myPackageManager = getPackageManager();
    boolean app_installed;
    try {
        myPackageManager.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);
        app_installed = true;
    }
    catch (PackageManager.NameNotFoundException e) {
        app_installed = false;
    }
    return app_installed;
}
    
    

boolean isAppInstalled = checkThisApp("com.facebook.katana");