Display images programmatically in Android

Question

I'm trying to write such a code : I have a string, and if string is "stack", I want to print s.gif, t.gif, a.gif, c.gif and k.gif. Here is the code that I wrote :

    String myString = "stack";
    for(int i = 0; i < myString.length(); i++)
    {
    String source= null;
if(myString .charAt(i) == 'a')
{
    source = "R.drawable.folder.a.gif";
}
 else if (myString .charAt(i) == 'b')
{
    source = "R.drawable.folder.b.gif";
}
    ...//it goes until z
            LinearLayout linearLayout= new LinearLayout(this);
            linearLayout.setOrientation(LinearLayout.VERTICAL);
            linearLayout.setLayoutParams(new AbsListView.LayoutParams(
                    AbsListView.LayoutParams.MATCH_PARENT,
                    AbsListView.LayoutParams.MATCH_PARENT));

            ImageView imageView = new ImageView(this);
            imageView.setImageResource();// I don't know what to write here
            imageView.setLayoutParams(new AbsListView.LayoutParams(
                    AbsListView.LayoutParams.MATCH_PARENT,
                    AbsListView.LayoutParams.WRAP_CONTENT));
            linearLayout.addView(imageView);
            setContentView(linearLayout);

}

What I'm trying to do is set source string and give it to the setImageResource(), but I failed. Can you tell me how to fix this code? Thanks.

If you know the path to the resource (the `R.drawable` part) why don't you just set an `int` referencing that directly? Why are you hard-coding a String instead? — Thorn G, Nov 16 '15 at 13:39
Change `String source = null` to something like `int source = -1` and in your if/else blocks, set `source = R.drawable.a`. Then pass `source` to the `ImageView` as normal. — Thorn G, Nov 16 '15 at 13:42
Side note, if you have a file `res/drawable/folder/a.gif`: Subfolders [are not supported for android resources](http://stackoverflow.com/questions/9029051/is-it-possible-to-use-sub-folders-in-drawables-in-android). Your images are probably not included in the app's resource `R` at all. — dhke, Nov 16 '15 at 13:43

score 2 · Accepted Answer · answered Nov 16 '15 at 13:43

2

First of all, Android has int-based resource pointers, so your source variable must be an int.

Then, simply assign it like this:

source = R.drawable.a

Put all your images in the res/drawable directory.

However, I am not sure if you will be able to use gifs like this without an library. Try it and if it does not work, use .pngs.

answered Nov 16 '15 at 13:43

Kelevandos

7,024
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One problem: all images print on each other, how to fix that? – jason Nov 16 '15 at 13:52
Are you adding a new ImageView for each letter? You should :-) – Kelevandos Nov 16 '15 at 13:54

score 1 · Answer 2 · answered Nov 16 '15 at 13:53

1

Change source to int instead of String

int source;

Then use this

imageView.setImageDrawable(getResources().getDrawable(source))

answered Nov 16 '15 at 13:53

Collins Abitekaniza

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Display images programmatically in Android

2 Answers2