PhotoView.java 文件源码

protected void init() {
    if (null == mAttacher || null == mAttacher.getImageView()) {
        mAttacher = new PhotoViewAttacher(this);
    }

    if (null != mPendingScaleType) {
        setScaleType(mPendingScaleType);
        mPendingScaleType = null;
    }

    if (mDraweeHolder == null) {
        GenericDraweeHierarchy hierarchy = new GenericDraweeHierarchyBuilder(getResources())
                .setFadeDuration(500)
                .setProgressBarImage(new CustomProgressbarDrawable(this))
                .build();
        mDraweeHolder = DraweeHolder.create(hierarchy, getContext());
    }
}