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POinheritance of custom activities with overloading setContentView, setListAdapter and etc
 

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  1. POinheritance of custom activities with overloading setContentView, setListAdapter and etc
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    <p>Dear Fellow Developers</p> <p>Need your advice about the architecture design, specifically about the <strong>inheritance of custom activities</strong>. In my case, there is a necessity to create a music application with the exactly same functionally like the original one but with a different UI and behavior.</p> <p>Please, hit me whether the approach described below is right or not. I would appreciate your suggestions how to <strong>use maximally functionalities of already implemented activities</strong>. </p> <p>I think to inherit my track browser, playlist browser, media playback and etc. activities from the standard ones of the original music player. Then I would need to replace the layout and intercept with appropriate handling some events.</p> <p><strong>Challenge 1:</strong> <em>setContentView</em> sets already the layout inside <em>onCreate</em> of an original activity. I need to call <em>super.onCreate</em> in my <em>onCreate</em> and then call <em>setContentView</em> again. I’ve investigated that it’s possible to <a href="https://stackoverflow.com/questions/7052484/calling-setcontentview-multiple-times">call <em>setContentView</em> several times</a> but it’s necessary to instantiate all UI elements each time again. I think that they may be performance and compatibility problems. <strong>My suggestion 1:</strong> overload <em>setContentView</em> and detect if the instance of the appropriate layout is passed. In case it’s we inflate the activity.</p> <p><strong>Challenge 2:</strong> almost all members are private in original activities but I would need to replace the adapter and may be some broadcast receivers loaded in the original activities. <strong>My suggestion 2:</strong> again I can overload <em>setListAdapter</em>, <em>registerReceivers</em> and etc. and check what kind of instances they try to load. If the instances are not ones of my classes I would skip loading them otherwise I would load it.</p> <p>I’m searching a root conception of a big project so I would like to be sure if my thinking is right in advance. Please, point whether I’m not violating conceptions of Android applications design.</p>
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    1. USNicolle
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    1. COwhat language you are talking about??
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      1. USThomas Berger
    2. COjava in android. Sorry, my first post :)
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    3. COand there is such a pretty `android` tag ^^ retaged, so the right people will see this question
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      1. USThomas Berger
 

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