access images from assets folder with a button click

Question

So right now i am using this in my code. But now i am storing them in the assets folder and i need help on how to display a different image when you click the next or previous button. So basically i would have a certain amount of pictures in the assets folder and then two button a next and back to scroll through the images. How would i do this? Thanks

private int [] images = {R.drawable.airplane, R.drawable.bike, R.drawable.boat,
    R.drawable.bus2,R.drawable.car,R.drawable.train};

You can use a hashmap. With R.drawable.airplane as the key. And the value would be the string. — Lawrence Gimenez, Oct 29 '13 at 09:25

waqaslam · Answer 1 · 2013-10-29T09:27:32.680

0

Yes, you can save your strings in a resource file. For example:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <!-- single string -->
    <string name="hello">Hello World</string>

    <!-- multiple strings as an array -->
    <string-array name="hello_array">
        <item>hello</item>
        <item>android</item>
        <item>world</item>
    </string-array>
</resources>

and later retrieve their references in your code as R.string.hello or R.array.hello_array respectively.

For more info, refer to this and this guide.

edited Oct 29 '13 at 09:27

answered Oct 29 '13 at 09:19

waqaslam

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what if i have an array of strings? like 6 strings and i want to display them in the order that i put them? – Dan Oct 29 '13 at 09:22
Yes, then you need to use `string-array`. Please refer to [this](http://mobile.tutsplus.com/tutorials/android/android-string/) guide – waqaslam Oct 29 '13 at 09:23

score 0 · Answer 2 · answered Oct 29 '13 at 09:33

0

You can have it like this, use HashMap.

HashMap<Integer, String> map = new HashMap<Integer, String>();
map.put(R.drawable.airplane, "Airplane");

then you can get the appropriate String by

String whatString = map.get(R.drawable.airplane);

answered Oct 29 '13 at 09:33

Lawrence Gimenez

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I'm still having some trouble grasping it.. Is it possible to show me one example of how it's done? – Dan Oct 29 '13 at 10:00
@Dan What part did you had trouble? – Lawrence Gimenez Nov 04 '13 at 05:21
hey Law i decided not to do that anymore can you help me on other problems? like making a button click to retrieve images from the asset folder? Thanks! – Dan Nov 04 '13 at 23:32
Hi @Dan I recommend ask a question about it here, because I think it is much better. – Lawrence Gimenez Nov 05 '13 at 02:17
hi @Law I revised my original question on the top. Hopefully it's clear to understand what i want to do now. – Dan Nov 05 '13 at 08:00
http://stackoverflow.com/questions/7776445/in-android-can-i-use-image-from-assets-in-layout-xml – Lawrence Gimenez Nov 06 '13 at 01:54
Hey @Dan hopefully you can get an idea from that link above. You can just use a single ImageView. – Lawrence Gimenez Nov 06 '13 at 01:55
Thanks! will give it a try and let you know. – Dan Nov 06 '13 at 05:12

access images from assets folder with a button click

2 Answers2