Code equivalent of android:cropToPadding

In my android app, I create thumbnails in xml this way:

<ImageView android:id="@+id/my_thumbnail
           android:layout_width="50dp"
           android:layout_height="50dp"
           android:background="@color/white"
           android:padding="2dp"
           android:scaleType="fitXY"
           android:cropToPadding="true" />

This creates a white border around the thumbnail - and looks quite nice.

Now, in another place in the code I need to create the thumbnails in the code, not XML (this is an Adapter class for GridView - to create a grid of thumbnails). I can set all parameters as required, however I cannot find a way to set the cropToPadding in the code. As a result, the thumbnail are drawn over the padding and it looks really ugly.

How do I set this cropToPadding thing in the code?

BTW, the app must work on Android 1.6.

Edit

Following a suggestion from userSeven7s, I add this style to my XML containing other styles:

<style name="GridImage">
    <item name="android:background">@color/white</item>
    <item name="android:padding">2dp</item>
    <item name="android:cropToPadding">true</item>
    <item name="android:typeface">monospace</item>
</style>

(Note that the file contains <resources> root element and contains a couple of other <style> elements. Yet all of the other ones are only referenced form layout xml files.)

I then added this code inside my grid view adapter:

public View getView(int position, View convertView, ViewGroup parent) {
    ImageView imageView;
    if (convertView == null) {
        XmlPullParser p开发者_运维知识库arser = mContext.getResources().getXml(R.style.GridImage);
        AttributeSet attributes = Xml.asAttributeSet(parser);
        imageView = new ImageView(mContext, attributes);
        // ... some more initialisation
    } else {
        imageView = (ImageView) convertView;
    }

    // ... code to create the bitmap and set it into the ImageView goes here
}

This compiles fine (i.e. R.style.GridImage exists). However when I run this code, the app crashes with Resources.NotFoundException on getXml(R.style.GridImage).

Any suggestions?

---

If you try the solution with AttributeSet and attributes.getAttributeCount() always returns 0, then just about the only solution left is this hack using reflection:

Field field = ImageView.class.getDeclaredField("mCropToPadding");
field.setAccessible(true);
field.set(imageView, true);

Using this you probably can't be sure it will work in other android firmware versions. Anyway the missing setter is probably just forgotten, so that justifies the hack for me.

---

You can get the thumbnails from the ImageView itself. Call getDrawingCache() on each imageview to get the bitmap used for drawing.

new Update :

Create a xml myimage_attrs.xml in xml folder and add all the imageview attributes you need to it.

<?xml version=”1.0″ encoding=”utf-8″?>
<item name=”android:layout_height”>10dp</item>
<item name=”android:layout_width”>10dp</item>
<item name="android:background">@color/white</item>
<item name="android:padding">2dp</item>
<item name="android:cropToPadding">true</item>
<item name="android:typeface">monospace</item>
....

Then create a AttributeSet out of the xml and pass it to the ImageView constructor.

XmlPullParser parser = resources.getXml(R.xml.myimage_attrs);
AttributeSet attributes = Xml.asAttributeSet(parser);

ImageView imgv = new ImageView(context, attributes);

---

For the benefit of others, here's what finally did work (thanks to userSeven7s for pushing me in the right direction).

I created grid_image.xml file with the following content:

<?xml version="1.0" encoding="utf-8"?>
<style>
    <item name="android:layout_height">50dp</item>
    <item name="android:layout_width">50dp</item>
    <item name="android:background">@color/white</item>
    <item name="android:padding">2dp</item>
    <item name="android:cropToPadding">true</item>
    <item name="android:scaleType">fitXY</item>
</style>

Then in my Adapter for the grid view, I put the following code:

public View getView(int position, View convertView, ViewGroup parent) {
    ImageView imageView;
    if (convertView == null) {
        XmlPullParser parser = mContext.getResources().getXml(R.xml.grid_image);
        AttributeSet attributes = null;
        int state = XmlPullParser.END_DOCUMENT;
        do {
            try {
                state = parser.next();
                if (state == XmlPullParser.START_TAG) {
                    if (parser.getName().equals("style")) {
                        attributes = Xml.asAttributeSet(parser);
                        break;
                    }
                }
            } catch (Exception ignore) {
            //ignore it - can't do much anyway
        } while(state != XmlPullParser.END_DOCUMENT);

        if(attributes == null)
            imageView = new ImageView(mContext);
        else
            imageView = new ImageView(mContext, attributes);

        //the rest of initialisation goes here
    } else {
        imageView = (ImageView) convertView;
    }

    //set image into the imageview here

    return imageView;
}