我开发一个Android应用程序用于网上购物。我创建了下面的视图使用产品目录 RecyclerView
,因为我想改变选择选项菜单项查看
I am developing an Android Application for Online Shopping. I have created following view for List of Products using RecyclerView
, in that i want to change view on selecting option menu item:
我已经创建了下面的适配器的 ProductAdapter
,因为我已经实现了code改变布局 onCreateViewHolder
选择基于布尔值,布局文件。
I have created following adapter named ProductAdapter
, in that I have implemented code for changing layout in onCreateViewHolder
for selecting layout file based on boolean value.
适配器 code ProductAdapter
Code of Adapter ProductAdapter
:
/***
* ADAPTER for Product to binding rows in List
*/
private class ProductAdapter extends RecyclerView.Adapter<ProductAdapter.ProductRowHolder> {
private List<Product> productList;
private Context mContext;
public ProductAdapter(Context context, List<Product> feedItemList) {
this.productList = feedItemList;
this.mContext = context;
}
@Override
public ProductRowHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(isProductViewAsList ? R.layout.product_row_layout_list : R.layout.product_row_layout_grid, null);
ProductRowHolder mh = new ProductRowHolder(v);
return mh;
}
@Override
public void onBindViewHolder(ProductRowHolder productRowHolder, int i) {
Product prodItem = productList.get(i);
// Picasso.with(mContext).load(feedItem.getName())
// .error(R.drawable.ic_launcher)
// .placeholder(R.drawable.ic_launcher)
// .into(productRowHolder.thumbnail);
double price = prodItem.getPrice();
double discount = prodItem.getDiscount();
double discountedPrice = price - (price * discount / 100);
String code = "";
if(prodItem.getCode() != null)
code = "[" + prodItem.getCode() + "] ";
productRowHolder.prodIsNewView.setVisibility(prodItem.getIsNew() == 1 ? View.VISIBLE : View.INVISIBLE);
productRowHolder.prodNameView.setText(code + prodItem.getName());
productRowHolder.prodOriginalRateView.setText("Rs." + new BigDecimal(price).setScale(2,RoundingMode.DOWN));
productRowHolder.prodDiscView.setText("" + new BigDecimal(discount).setScale(2,RoundingMode.DOWN) + "% off");
productRowHolder.prodDiscRateView.setText("Rs." + new BigDecimal(discountedPrice).setScale(2,RoundingMode.DOWN));
productRowHolder.prodOriginalRateView.setPaintFlags(productRowHolder.prodOriginalRateView.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
}
@Override
public int getItemCount() {
return (null != productList ? productList.size() : 0);
}
public class ProductRowHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
//Declaration of Views
public ProductRowHolder(View view) {
super(view);
view.setOnClickListener(this);
//Find Views
}
@Override
public void onClick(View view) {
//Onclick of row
}
}
}
之后,我做了$ C $下更改 RecyclerView
布局从列表
到所以它会调用适配器,一改再改值。
After that i have done code for Changing RecyclerView
layout from List
to Grid
and Vice Versa in onOptionsItemSelected
, here i am calling mAdapter.notifyDataSetChanged();
so it will call adapter again and change value.
onOptionsItemSelected
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
switch (id) {
case R.id.action_settings:
return true;
case android.R.id.home:
finish();
break;
case R.id.product_show_as_view:
isProductViewAsList = !isProductViewAsList;
supportInvalidateOptionsMenu();
mRecyclerView.setLayoutManager(isProductViewAsList ? new LinearLayoutManager(this) : new GridLayoutManager(this, 2));
mAdapter.notifyDataSetChanged();
break;
}
return super.onOptionsItemSelected(item);
}
我有点像成功的:
I got little bit success like:
栅格图像
布局:
列表的图像
布局:
但现在当我滚动列表,变化视图显示的是这样的:
电网
布局:
列表
布局:
我不知道为什么滚动后它发生。是否有任何其他的方式来改变看法是这样的。
今天,我刚才看到这个问题是因为的ImageView
,没有它工作完美。
Today i just saw that this problem is because of ImageView
, without it working perfectly.
帮助请你帮忙将AP preciated。
Help please, You help will be appreciated.
推荐答案
我通过重新设置适配器解决了这个问题的 RecyclerView
,改变布局管理器之后。
I solved this problem by setting the adapter again to the RecyclerView
, after changing the layout manager.
listView.setLayoutManager(new LinearLayoutManager(this));
listView.setAdapter(adapter);
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