我正在使用带有多个不同布局文件的RecyclerView进行数据绑定,但使用的是通用视图模型。有没有办法让生成的Binding文件实现一个通用接口来简化以下(工作但丑陋)的代码?
给定布局文件,例如:
R.layout.list_item_cat
R.layout.list_item_dog
R.layout.list_item_mouse
在ActionAdapter中:
@Override
public ActionAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
@LayoutRes int layoutToInflate;
switch (viewType) {
case 0:
layoutToInflate = R.layout.list_item_cat;
break;
case 1:
layoutToInflate = R.layout.list_item_dog;
break;
case 2:
layoutToInflate = R.layout.list_item_mouse;
break;
}
return new ViewHolder(DataBindingUtil.inflate(LayoutInflater.from(parent.getContext()), layoutToInflate, parent, false));
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
if (holder.mBinding instanceof ListItemCatBinding) {
((ListItemCatBinding) holder.mBinding).setViewModel(mViewModelList.get(position));
}
else if (holder.mBinding instanceof ListItemDogBinding) {
((ListItemDogBinding) holder.mBinding).setViewModel(mViewModelList.get(position));
}
else if (holder.mBinding instanceof ListItemMouseBinding) {
((ListItemMouseBinding) holder.mBinding).setViewModel(mViewModelList.get(position));
}
我知道上面的例子并不算太糟糕,但是能够操作一组Binding文件会很方便,这些文件可以共享常见的东西,而不必经常检查和转换它们的类型,特别是在更复杂的情况下
答案 0 :(得分:3)
查看这篇文章:
https://medium.com/google-developers/android-data-binding-recyclerview-db7c40d9f0e4#.l6soxb3sd
您可以使用:
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.mBinding.setVariable(BR.viewModel, mViewModelList.get(position));
holder.mBinding.executePendingBindings();
}
答案 1 :(得分:0)
您应该覆盖函数getViewType(int position)以获取要绑定数据的正确布局