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    <p>A very detailed question I will do my best to answer it. I used the following approach in my application: </p> <ul> <li><p>I save the user credentials in the shared preferences. The preferences can only hold custom objects if they are serializable and writing and reading from flash memory takes a lot of time. Therefore I load the preferences on startup and store them in memory.</p></li> <li><p>I try to keep all the data in memory that is needed in many places and in a consistent state, all the other memory is passed via serializing to json and passing through an intent or i pass only ids and I re fetch it from the net. (There is definitively a possibility for cashing in a local database but the effort to keep it up to date is to much work at the moment.) To store objects that take to long to reload from internal memory or network and re parse it I use a custom <a href="http://developer.android.com/reference/android/app/Application.html" rel="noreferrer">application</a> that holds the reference to some controller objects which manage the caching. The application will stay in memory until your app is closed. This is convenient but can result in needing way to much memory if you are not careful.</p></li> <li><p>The bitmaps that are downloaded by my program are cached on two layers. At the first time I want to access an image I create a image manager object inside my activity scope. That object will try to find the bitmap in an internal map. If it is not there it will try to load it from phone memory if it is not in the phone memory it will download it from the net, store it in the cache folder of my app and put it in the map. In this way the bitmap is accessible as long as the activity runs and is cleaned up at the moment the user changes to another screen. Until now this is sufficient for me.</p></li> </ul> <p>At the end just begin programming and come back if you encounter other questions or errors and post some more specific questions. </p>
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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