P02 show的API设计的不是很好

public void show(ImageView i, List<ImageView> imageGroupList, final List<Uri> urlList) {

之前设计的是第二个imageGroupList和第三个参数urlList是对应关系，且顺序也需要对应，且点击触发show的imageView必须是 imageGroupList中的元素限制太多

public void show(ImageView i, SparseArray<ImageView> imageGroupList, final List<Uri> urlList) {

思考后发现，把第二个入参改成了 SparseArray类型，imageGroupList的key(position) 映射 urlList中的url地址要灵活很多，点击触发show的imageView依旧需要在imageGroupList中，来确认初始位置。这样设计更适合聊天界面来查看图片列表。

要改变的地方 3处

/**
     * @param i              被点击的ImageView
     * @param imageGroupList
     * @param urlList        被加载的图片url列表，数量必须大于等于 imageGroupList.size。 且顺序应当和imageGroupList保持一致
     */
    public void show(ImageView i, SparseArray<ImageView> imageGroupList, final List<Uri> urlList) {
        if (i == null || imageGroupList == null || urlList == null || imageGroupList.size() < 1 ||
                urlList.size() < imageGroupList.size()) {
            String info = "i[" + i + "]";
            info += "#imageGroupList " + (imageGroupList == null ? "null" : "size : " + imageGroupList.size());
            info += "#urlList " + (urlList == null ? "null" : "size :" + urlList.size());
            throw new IllegalArgumentException("error params \n" + info);
        }

        initPosition = -1;
        for (int x = 0; x < imageGroupList.size(); x++) {
            if (imageGroupList.get(imageGroupList.keyAt(x)) == i) {
                initPosition = imageGroupList.keyAt(x);
                break;
            }
        }
        if (initPosition < 0) {
            throw new IllegalArgumentException("param ImageView i must be a member of the List <ImageView> imageGroupList!");
        }

        ...
    }

private boolean setDefaultDisplayConfigs(final ImageView imageView, final int pos, boolean hasPlayBeginAnimation) {
            boolean isFindEnterImagePicture = false;

            ViewState.write(imageView, ViewState.STATE_ORIGIN).alpha(0).scaleXBy(1.5f).scaleYBy(1.5f);
            if (mImageGroupList.get(pos) != null) {  // 这里
                ImageView originRef = mImageGroupList.get(pos);
                if (pos == initPosition && !hasPlayBeginAnimation) {

 @Override
    public void onPageSelected(int position) {
        iSource = adapter.mImageSparseArray.get(position);
        if (iOrigin != null) {
            iOrigin.setVisibility(View.VISIBLE);
        }
        if (mImageGroupList.get(position) != null) { // 这里
            iOrigin = mImageGroupList.get(position);
            if (iOrigin.getDrawable() != null) iOrigin.setVisibility(View.INVISIBLE);
        }

调用

conversationAdapter1 = ConversationAdapter1().apply {
                cb = object : ConversationAdapter1.Callback {
                    override fun onPictureClick(view: ImageView, uri: Uri, uriList: List<Uri>, position: Int) {
                        // view 被点击的imageView
                        // uri 被点击的imageView对应展示的图片地址信息
                        // uriList 一整个要展示的图片列表

                        vImageWatcher.show(view, SparseArray<ImageView>().apply {
                            put(uriList.indexOf(uri), view)
                        }, uriList)
                    }
                }
            }

效果

iielse / imageviewer

P02 show的API设计的不是很好 #15