LayerDrawable(LayerState state, Resources res) {
LayerState as = createConstantState(state, res);
mLayerState = as;
if (as.mNum > 0) {
ensurePadding();
}
}
@Override
public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs)
throws XmlPullParserException, IOException {
super.inflate(r, parser, attrs);
int type;
final int innerDepth = parser.getDepth() + 1;
int depth;
while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
&& ((depth = parser.getDepth()) >= innerDepth || type != XmlPullParser.END_TAG)) {
if (type != XmlPullParser.START_TAG) {
continue;
}
if (depth > innerDepth || !parser.getName().equals("item")) {
continue;
}
TypedArray a = r.obtainAttributes(attrs, com.android.internal.R.styleable.LayerDrawableItem);
int left =
a.getDimensionPixelOffset(com.android.internal.R.styleable.LayerDrawableItem_left, 0);
int top =
a.getDimensionPixelOffset(com.android.internal.R.styleable.LayerDrawableItem_top, 0);
int right =
a.getDimensionPixelOffset(com.android.internal.R.styleable.LayerDrawableItem_right, 0);
int bottom =
a.getDimensionPixelOffset(com.android.internal.R.styleable.LayerDrawableItem_bottom, 0);
int drawableRes =
a.getResourceId(com.android.internal.R.styleable.LayerDrawableItem_drawable, 0);
int id = a.getResourceId(com.android.internal.R.styleable.LayerDrawableItem_id, View.NO_ID);
a.recycle();
Drawable dr;
if (drawableRes != 0) {
dr = r.getDrawable(drawableRes);
} else {
while ((type = parser.next()) == XmlPullParser.TEXT) {}
if (type != XmlPullParser.START_TAG) {
throw new XmlPullParserException(
parser.getPositionDescription()
+ ": <item> tag requires a 'drawable' attribute or "
+ "child tag defining a drawable");
}
dr = Drawable.createFromXmlInner(r, parser, attrs);
}
addLayer(dr, id, left, top, right, bottom);
}
ensurePadding();
onStateChange(getState());
}
/**
* Create a new layer drawable with the specified list of layers and the specified constant state.
*
* @param layers The list of layers to add to this drawable.
* @param state The constant drawable state.
*/
LayerDrawable(Drawable[] layers, LayerState state) {
this(state, null);
int length = layers.length;
ChildDrawable[] r = new ChildDrawable[length];
for (int i = 0; i < length; i++) {
r[i] = new ChildDrawable();
r[i].mDrawable = layers[i];
layers[i].setCallback(this);
mLayerState.mChildrenChangingConfigurations |= layers[i].getChangingConfigurations();
}
mLayerState.mNum = length;
mLayerState.mChildren = r;
ensurePadding();
}