How to change border thickness around images in HelloGallery

问题

I'm not really sure if it's the thickness of the border or the margin around the image that needs to be changed. I have never worked with styles before, and just created a styles.xml and colors.xml file for the first time. I have changed the background color to Red, using the code below in image_border.xml. But I do not know how to change the border thickness around the images in HelloGallery.

Perhaps it's not in this file. But what exactly needs to be written in the code?

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:top="1dp" android:left="1dp" 
        android:right="1dp" android:bottom="1dp">
        <shape android:shape="rectangle">
            <solid android:color="@color/red" />
        </shape>
    </item>
</layer-list>

Edit: The answer might actually be a matter of modifying this portion of the code, since I was able to change the border color and image size here:

    public View getView(int position, View convertView,
      ViewGroup parent) {
        ImageView i = new ImageView(mContext);

        Bitmap bm = BitmapFactory.decodeFile(
        FileList.get(position).toString());
        i.setImageBitmap(bm);
        i.setLayoutParams(new Gallery.LayoutParams(160, 180));
        i.setScaleType(ImageView.ScaleType.FIT_XY);
        i.setBackgroundResource(mGalleryItemBackground);
        i.setBackgroundColor(Color.BLUE);
        return i;
    }

回答1:

You're almost there. A border is called a stroke, you can specify it like this:

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:top="1dp" android:left="1dp" 
    android:right="1dp" android:bottom="1dp">
    <shape android:shape="rectangle">
        <solid android:color="@color/red" />
        <stroke android:width="1dp" />
    </shape>
</item>

回答2:

I think a simple solution for you is here:

http://groups.google.com/group/android-developers/browse_thread/thread/157740b639959c47?pli=1

hope it helps

回答3:

The border around the image actually is background padding:

i.setPadding(1, 1, 1, 1);

来源：https://stackoverflow.com/questions/9027663/how-to-change-border-thickness-around-images-in-hellogallery

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android