BadgeDrawableBuilder.java 文件源码

public StateListDrawable build(Context ctx) {
    StateListDrawable stateListDrawable = new StateListDrawable();

    GradientDrawable normal = (GradientDrawable) ContextCompat.getDrawable(ctx, R.drawable.action_item_badge);
    GradientDrawable selected = (GradientDrawable) normal.getConstantState().newDrawable().mutate();

    normal.setColor(mColor);
    selected.setColor(mColorPressed);

    if (mStroke > -1) {
        normal.setStroke(mStroke, mStrokeColor);
        selected.setStroke(mStroke, mStrokeColor);
    }

    if (mCorners > -1) {
        normal.setCornerRadius(mCorners);
        selected.setCornerRadius(mCorners);
    }

    stateListDrawable.addState(new int[]{android.R.attr.state_pressed}, selected);
    stateListDrawable.addState(StateSet.WILD_CARD, normal);

    return stateListDrawable;
}