/**
* @param index 小于0则顺序插入(插入至最末尾);大于等于0则按指定索引值(index)插入
* @param childView
* @return
*/
public boolean addChildView(int index, View childView) {
if (childViews.contains(childView)) {
return false;
}
if (null == childView.getTag()) {
// 结构层操作
// tag为null说明此view在添加至文件夹内之前是处于桌面上的,所以需要将其从根文件夹对象中删除
GlobalDataCacheForMemorySingleton.getInstance
.getRootDirectory()
.getListFiles()
.remove(((DragView) childView).getBookFile());
} else {
((BookFolderLayout) childView.getTag()).removeChildView(childView, true);
}
if (null != childView.getParent()) {
((ViewGroup) childView.getParent()).removeView(childView);
}
if (index < 0) {
childViews.add(childView);
} else {
childViews.add(index, childView);
}
// 生成缩略图控件
BookThumbnailLayout bookThumbnailLayout = new BookThumbnailLayout(getContext());
bookThumbnailLayout.bind((BookShelfBookCell) childView);
childView.setTag(R.id.bookThumbnailView, bookThumbnailLayout);
MyGridLayout.LayoutParams layoutParams = new MyGridLayout.LayoutParams();
layoutParams.width = (int) getResources().getDimension(R.dimen.book_cell_width) / 3;
layoutParams.height = (int) getResources().getDimension(R.dimen.book_image_height) / 3;
layoutParams.topMargin = 4;
layoutParams.leftMargin = 4;
layoutParams.rightMargin = 4;
layoutParams.bottomMargin = 4;
// 顺序插入时,封面只显示前4本书
if (index < 0) {
if (gridLayout.getChildCount() < 4) {
gridLayout.addView(bookThumbnailLayout, layoutParams);
}
}
// 指定插入时,若索引值小于4则需将封面上多余的一张缩略图(即原第4张)删除
else if (index < 4) {
if (gridLayout.getChildCount() == 4) {
gridLayout.removeViewAt(3);
}
gridLayout.addView(bookThumbnailLayout, index, layoutParams);
}
childView.setTag(this);
updateFrontCover(); // 刷新封面
return true;
}
