Playstore update functionality in android

Step 1 :-  Initialize this into globally

private AppUpdateManager appUpdateManager;
private static final int UPDATE_REQUEST_CODE = 101;
private InstallStateUpdatedListener installStateUpdatedListener;

Step2 :- In on create ,

appUpdateManager = AppUpdateManagerFactory.create(this);
installStateUpdatedListener = state -> {
    if (state.installStatus() == InstallStatus.DOWNLOADED) {
        appUpdateManager.completeUpdate();
    }
};

appUpdateManager.registerListener(installStateUpdatedListener);

appUpdateManager.getAppUpdateInfo()
        .addOnSuccessListener(appUpdateInfo -> {

            if (appUpdateInfo.updateAvailability() == UpdateAvailability.UPDATE_AVAILABLE
                    && appUpdateInfo.isUpdateTypeAllowed(AppUpdateType.FLEXIBLE)) {

                try {
                    appUpdateManager.startUpdateFlowForResult(
                            appUpdateInfo,
                            AppUpdateType.FLEXIBLE,
                            this,
                            UPDATE_REQUEST_CODE
                    );
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });

Step3 :- In lifecycle ,

@Override
protected void onResume() {
    super.onResume();
    TAG = "home"; //
    appUpdateManager.getAppUpdateInfo()
            .addOnSuccessListener(info -> {
                if (info.installStatus() == InstallStatus.DOWNLOADED) {
                    appUpdateManager.completeUpdate();
                }
            });
}

Step4 :- In lifecycle

@Override
protected void onDestroy() {
    super.onDestroy();
    if (appUpdateManager != null && installStateUpdatedListener != null) {
        appUpdateManager.unregisterListener(installStateUpdatedListener);
    }
}