ChipDrawable.java 文件源码

/**
 * Returns a ChipDrawable from the given XML resource. All attributes from {@link
 * R.styleable#ChipDrawable} and a custom <code>style</code> attribute are supported. A chip
 * resource may look like:
 *
 * <pre>{@code
 * <chip
 *     xmlns:app="http://schemas.android.com/apk/res-auto"
 *     style="@style/Widget.MaterialComponents.Chip.Entry"
 *     app:chipIcon="@drawable/custom_icon"/>
 * }</pre>
 */
public static ChipDrawable createFromResource(Context context, @XmlRes int id) {
  try {
    XmlPullParser parser = context.getResources().getXml(id);

    int type;
    do {
      type = parser.next();
    } while (type != XmlPullParser.START_TAG && type != XmlPullParser.END_DOCUMENT);
    if (type != XmlPullParser.START_TAG) {
      throw new XmlPullParserException("No start tag found");
    }

    if (!TextUtils.equals(parser.getName(), "chip")) {
      throw new XmlPullParserException("Must have a <chip> start tag");
    }

    AttributeSet attrs = Xml.asAttributeSet(parser);
    @StyleRes int style = attrs.getStyleAttribute();
    if (style == 0) {
      style = R.style.Widget_MaterialComponents_Chip_Entry;
    }

    return createFromAttributes(context, attrs, R.attr.chipStandaloneStyle, style);
  } catch (XmlPullParserException | IOException e) {
    Resources.NotFoundException exception =
        new NotFoundException("Can't load chip resource ID #0x" + Integer.toHexString(id));
    exception.initCause(e);
    throw exception;
  }
}