Question

I would like my application after making it five calculations.
That is, using 5 times.
After using it to block five times, and would show the message to buy the PRO version

How does my application I calculate, calculate and use the button, I guess I could count how many times the compute button is pressed, just do not know how to lock after 5 times.

Someone help me, thanks

Answer 1

Create a Class that keeps track of your app loads and saves them in the SharePreferences

public static Boolean app_launched(Context mContext) {
            SharedPreferences prefs = mContext.getSharedPreferences("loadCounter", 0);
            SharedPreferences.Editor editor = prefs.edit();

            // Increment launch counter
            long launch_count = prefs.getLong("launch_count", 0) + 1;
            editor.putLong("launch_count", launch_count);
            editor.commit();

            if(launch_count > 5)
                return false;

            return true;
}

call that function in the onCreate of your Start Activity.