@Override
public ConstantState getConstantState() {
if (mScaleState.canConstantState()) {
mScaleState.mChangingConfigurations = getChangingConfigurations();
return mScaleState;
}
return null;
}
public ScaleDrawable(Drawable drawable, int gravity, float scaleWidth, float scaleHeight) {
this(null, null);
mScaleState.mDrawable = drawable;
mScaleState.mGravity = gravity;
mScaleState.mScaleWidth = scaleWidth;
mScaleState.mScaleHeight = scaleHeight;
if (drawable != null) {
drawable.setCallback(this);
}
}
@Override
public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs)
throws XmlPullParserException, IOException {
super.inflate(r, parser, attrs);
int type;
TypedArray a = r.obtainAttributes(attrs, com.android.internal.R.styleable.ScaleDrawable);
float sw = getPercent(a, com.android.internal.R.styleable.ScaleDrawable_scaleWidth);
float sh = getPercent(a, com.android.internal.R.styleable.ScaleDrawable_scaleHeight);
int g = a.getInt(com.android.internal.R.styleable.ScaleDrawable_scaleGravity, Gravity.LEFT);
boolean min =
a.getBoolean(
com.android.internal.R.styleable.ScaleDrawable_useIntrinsicSizeAsMinimum, false);
Drawable dr = a.getDrawable(com.android.internal.R.styleable.ScaleDrawable_drawable);
a.recycle();
final int outerDepth = parser.getDepth();
while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
&& (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) {
if (type != XmlPullParser.START_TAG) {
continue;
}
dr = Drawable.createFromXmlInner(r, parser, attrs);
}
if (dr == null) {
throw new IllegalArgumentException("No drawable specified for <scale>");
}
mScaleState.mDrawable = dr;
mScaleState.mScaleWidth = sw;
mScaleState.mScaleHeight = sh;
mScaleState.mGravity = g;
mScaleState.mUseIntrinsicSizeAsMin = min;
if (dr != null) {
dr.setCallback(this);
}
}