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POPassing Extras and screen rotation
 

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    <p>This kind of questions appear periodically. Sorry if this has been covered before, but I'm a newbie and couldn't find the appropriate answer. It deals with the correct implementation of communication between classes and activities.</p> <p>I made a gallery app. It has 3 main activities: the <code>Main</code> one, to search for filenames using a pattern; a <code>Thumb</code> one, that shows all the images that matched the pattern as thumbnails in a gridview, and a <code>Photo</code> activity, that opens a full sized image when you click a thumb in <code>Thumbs</code>. I pass to the <code>Photo</code> activity via an <code>Intent</code> the filenames (an array), and the <code>position</code> (an <code>int</code>) of the clicked thumb in the gridview.</p> <p>This third <code>Photo</code> activity has only one view on it: a <code>TouchImageView</code>, that I adapted for previous/next switching and zooming according to where you shortclick on the image (left, right or middle). Moreover, I added a longclick listener to <code>Photo</code> to show EXIF info. </p> <p>The thing is working, but I am not happy with the implementation... Some things are not right.</p> <p>One of the problems I am experiencing is that, if I click on the right of the image to see the next in the <code>Photo</code> activity, it switches fine (<code>position++</code>), but when rotating the device the original one at <code>position</code> appears.</p> <p>What is happening is that <code>Photo</code> is destroyed when rotating the image, and for some reason it restarts again, without obeying <code>super.onCreate(savedInstanceState)</code>, loading again the Extras (the <code>position</code> only changed in <code>Photo</code>, not on the parent activities).</p> <p>I tried with <code>startActivityForResult</code> instead of <code>startActivity</code>, but failed...</p> <p>Of course I can do something contrived to save the <code>position</code> data, but there should be something "conceptual" that I am not understanding about how activities work, and I want to do this right.</p> <p>Can someone please explain me what I am doing wrong, which is the best method to implement what I want, and why?</p> <p>Thanks a lot!!!</p>
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    1. USLuis A. Florit
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    1. COSince you haven't posted any code whatsoever (so please do so), I will ask the obvious: Did you override `onSaveInstanceState()`?
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      1. USA--C
    2. CO@A--C: Yes, I did. I wrote that above.
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    3. COWell you said it's not obeying in onCreate() so maybe you're having issues with saving the bundle. Either way attach code.
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      1. USA--C
 

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