Need suggestions how to save my Data
<p>I'm currently creating an App for fitness. I'd like to save the Weights and repetitions of all exercises of every day.</p>

<p>In my Main-Activity the user can chose between: Creating an Exercise(Icon/Bitmap + Name/String), creating a Train-Session(Collection of Exercises) or selecting a day from a calendar and start training...</p>

<p>When the user pressed a day in the calendar he can chose a Train-Session and afterwards he can click on all exercises of the chosen train-session, to enter weights and repetitions. Every Exercise has to save 6 Doubles (3 x (repetition + weight)).</p>

<p>Now my Problem: I dont have any idea how i could save the data in my App. My problems are that the user can add or delete exercises and train-sessions + the weights + repetitions of all exercises of every day have to be saved.</p>

<p>Hope you have some suggestions...
Have a nice day :p</p>
