How to get package name from apk in Android?

Question

I am developing an app which will contain a list of Apps. On click the user will be redirected to the Play Store to download this app. On successful download I have to send that apps package name to a server to validate it. How can I do that?

Answer 1

You can get all installed app in device using below code

final PackageManager pm = getPackageManager();
//get a list of installed apps.
List<ApplicationInfo> packages = pm.getInstalledApplications(PackageManager.GET_META_DATA);

for (ApplicationInfo packageInfo : packages) {
    Log.d(TAG, "Installed package :" + packageInfo.packageName);
    Log.d(TAG, "Source dir : " + packageInfo.sourceDir);
    Log.d(TAG, "Launch Activity :" + pm.getLaunchIntentForPackage(packageInfo.packageName)); 
}

and find package name in for loop.

Answer 2

I assume you want to do this at runtime, so your app can read its own package_id w/o having this hardcoded. For that you need to use PackageManager's getPackageInfo() method:

protected String getPackageName() {
    try {
        PackageInfo packageInfo = getPackageManager.getPackageInfo(getPackageName(), 0);

        return packageInfo.applicationInfo.packageName;
    } catch (Exception e) {
        e.printStacktrace();
    }

    return null;
}

Answer 3

Use apkanalyzer, its part of the Android studio:

apkanalyzer manifest application-id path/to/apk/file.apk