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I tried to implement a "pro key" for my android app to unlock features which should be locked at "trail version" (the same app without the key)...

I found some ideas and some explained code (e.g. this), but if I test this stuff it wouldnt do any thing. My app doesnt recognize the "package".

The in-app-billing solution by google is much to complicated for me. I read the documentary a lot of times but it looks so weird to me. puhhh. :-/

Oh man... I spent so many days and weeks for my app and now the release is the most frustrating task to do.

I hope somebody could help me.

Best wishes from Germany Martin

Edit: I try to implement this in my SharedPreferences like this way:

if (isProInstalled(this)) {
        addPreferencesFromResource(R.xml.settingsactivity);
        PreferenceManager.setDefaultValues(SettingsActivity.this,
                R.xml.settingsactivity, false);
        for (int i = 0; i < getPreferenceScreen().getPreferenceCount(); i++) {
            initSummary(getPreferenceScreen().getPreference(i));
        }
    } else {
        addPreferencesFromResource(R.xml.settingsactivity_pro);
        PreferenceManager.setDefaultValues(SettingsActivity.this,
                R.xml.settingsactivity_pro, false);
        for (int i = 0; i < getPreferenceScreen().getPreferenceCount(); i++) {
            initSummary(getPreferenceScreen().getPreference(i));
        }
    }
}
Martin Pfeffer
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1 Answers1

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You will have to make a Pro and a Non-pro edition of he app, and sell them seperatelly. The only way to do this without doing so is to enable in-app purchases and follow google's guide for in-app purchases.

Stamatis Bakolis
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  • It is possible with the in-app purchases feature, I'd greatly recommend the 2-Apps thought its more profitable (free app also pays you from adds) and it will be less confuzing with the google merchant,taxes from your sales ect. – Stamatis Bakolis Mar 03 '14 at 23:47
  • okay, this will be true. :) So at this moment try the in-app-billing methode again.. importing the IInAppBillingService.aidl -> results "coulnt find .apk" ARGGGG -.- I followed every step of googles doc. oO sh** – Martin Pfeffer Mar 04 '14 at 00:02
  • Where do you get this error ? On Eclipse , on google dev platform? – Stamatis Bakolis Mar 04 '14 at 00:09
  • You mean Android Studio? No, at Eclipse. This is the third time I reload my project form external storage in to eclipse. Ive never seen something complicated like that - even working with pointers in c++ is quite more comfortable than this crap. :-/ Do you know an good tutorial to implement in-app-billings? Did you ever implement this feature? – Martin Pfeffer Mar 04 '14 at 00:17
  • I believe you can easier find an awnser by submiting your question in this section of the site http://stackoverflow.com/tags/google-play-services/new or by adding tag "google-play-services" because i dont really know if i can help you with this to the end as my country cant support In-App purchases.Sorry for that. (All i could find was this Q&A also on stack overflow http://stackoverflow.com/questions/2022945/implementing-in-app-purchases-in-android) – Stamatis Bakolis Mar 04 '14 at 00:19