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POandroid design considerations: AsyncTask vs Service (IntentService?)
 

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  1. POandroid design considerations: AsyncTask vs Service (IntentService?)
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    <p>I'm designing an android app which will need to do the following steps:</p> <ol> <li>user pushes a button or otherwise indicates to "sync data".</li> <li>sync process will use REST web services to move data to and from the server.</li> <li>the data will be stored locally in a sqlite database.</li> <li>the sync process should provide status updates/messages to the UI </li> <li>the user should not be allowed to wander off to other parts of the application and do more work during the sync process.</li> </ol> <p>The first time the sync process runs, it may take 10-20 minutes. After the initial sync, less data will be transferred and stored and I expect the process to take 1-2 minutes or less.</p> <p>I've been doing a lot of reading about android's <code>AsyncTask</code> and various examples of using a Service ... But I don't fully understand the design considerations and trade-offs of choosing one design over the other. I currently have my demo project stubbed out using an AsyncTask. After watching (most of) Developing Android REST client applications: <a href="http://code.google.com/events/io/2010/sessions/developing-RESTful-android-apps.html#" rel="noreferrer">http://code.google.com/events/io/2010/sessions/developing-RESTful-android-apps.html#</a> I'm left confused the design patterns described here feel overly complex, perhaps because I just "don't get it" yet.</p> <p>I come from a java, spring, web and desktop application background. Thinking and designing in terms of a handheld device is quite new to me. (What happens when the screen layout is changed? What happens when the phone rings while I'm running a sync?) Taking 2 steps back, if the initial sync IS going to be such a long running process, is there a better way for me to think about the problem->solution, the user experience, the user expectations of an application running on a phone? </p> <p>Would love to hear from some more experienced android developers out there who have already wrestled with these questions.</p>
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    1. USMarian Paździoch
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    1. COhow long(typically) would the sync process take?
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    2. COinitial synch may take 10-20 minutes b/c of the amount of data that will be pulled down. after that, the process may take 1-2 minutes or less.
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