How to detect Android App has been upgraded from version x to y?

debugcn Published at Dev

EV221

I have a problem with my android app for own educational reason.

Is there a ready solution to detect that the app has now been updated from version x to y? Because I want to migrate some data once only if the app was installed in a special version before.

Thanks.

Md. Sajedul Karim

Here is a simple way that can solve your problem. In your code you can easily get the app versionCode and versionName. In your home activity you check isAppUpdated(). if current APP VERSION_NAME is not matched with stored VERSION_NAME then app is updated.

Here is sample code:

Save VersionName in preferences:

public static void saveVersionNameAndCode(Context context){
        try{
            PackageInfo packageInfo = context.getPackageManager()
                    .getPackageInfo(context.getPackageName(), 0);
            int versionCode = packageInfo.versionCode;
            String versionName=packageInfo.versionName;

            CommonTasks.showLog("Saving APP VersionCode and Version Name");

            // SAVE YOUR DATA

        }catch(Exception e){
        }
    }

Check App is Upgraded:

public static boolean isAppUpdated(Context context){
        boolean result=false;
        try{
            PackageInfo packageInfo = context.getPackageManager()
                    .getPackageInfo(context.getPackageName(), 0);
            int versionCode = packageInfo.versionCode;
            String versionName=packageInfo.versionName;

            String prevVersionName= GET STORED VERSION_NAME;
            if(prevVersionName!=null && !prevVersionName.equals("") &&
                    !prevVersionName.equals(versionName)){
                showLog("App Updated");
                result=true;
            }else{
                showLog("App Not updated");
            }

        }catch(Exception e){
        }
        return result;
    }

here, if isAppUpdated() return true means your app is updated.

Note, After checking upgrade issue, you must have to update the sharedPreferences. :)

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