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POAndroid: Intended use of fragments with services, dialogs etc
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copied!<p>I've been creating android apps for a few months now and I'm having trouble with the intended use of <code>Fragments</code>.</p> <p><code>Fragments</code> are supposed to be reusable UI components but how far do you make them stand alone?</p> <p>One of the <code>Fragments</code> I've created is a <code>ListFragment</code> of downloadable videos. At the moment I've implemented all the methods inside the <code>Fragment</code> with little or none of the methods calling the host <code>Activity</code>. The <code>Fragment</code> calls the <code>Activity</code> for a few minor things but everything like downloading files and finding them on external storage is done by the <code>Fragment</code>.</p> <p>90% of the time I find it's the easiest way of implementing it but there's some times it just doesn't work.</p> <p>An example is a confirmation dialog for deleting a video in my <code>ListFragment</code>. The dialog is a <code>DialogFragment</code> so is attached to the <code>Activity</code> but all the UI update and deletion methods are inside the <code>ListFragment</code>. So I end up with the <code>DialogFragment</code> calling the <code>Activity</code> just to call the <code>ListFragment</code>.</p> <p>Another example is binding to a <code>Service</code>. Do I bind the <code>Activity</code> to the <code>Service</code> or just the <code>Fragment</code>? The <code>Activity</code> has no use for the <code>Service</code> but is a <code>Fragment</code> supposed to be doing all the work of starting and maintaining a <code>Service</code>? If not it means all the <code>Fragments</code> calls to the <code>Service</code> have to go through the <code>Activity</code> so the <code>Fragment</code> is no longer stand alone.</p> <p>I'm wondering if I'm taking the stand alone idea too far, is a <code>Fragment</code> instead supposed to be minimally self-contained and actually rely on the <code>Activity</code> hosting it for all the heavy lifting?</p> <p>Thanks for any help.</p>

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