单击按钮访问资产文件夹中的图像

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};

Answer 1

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.

Answer 2

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);