我在活动中使用了回收站视图。这是我的适配器类:
public class ComparisonResultRecyclerViewAdapter extends RecyclerView.Adapter<ComparisonResultRecyclerViewAdapter.MyViewHolder> {
Context ctx;
ArrayList<ComparisonResultRecyclerViewInfoStore> comparisonDataList;
public ComparisonResultRecyclerViewAdapter(Context ctx, ArrayList<ComparisonResultRecyclerViewInfoStore> comparisonDataList)
{
this.ctx = ctx;
this.comparisonDataList = comparisonDataList;
}
@Override
public ComparisonResultRecyclerViewAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new ComparisonResultRecyclerViewAdapter.MyViewHolder(LayoutInflater.from(ctx).inflate(R.layout.comparison_result_recyclerview_layout, parent, false));
}
@Override
public void onBindViewHolder(ComparisonResultRecyclerViewAdapter.MyViewHolder holder, int position) {
holder.title.setText(comparisonDataList.get(position).getTitle());
holder.description.setText(comparisonDataList.get(position).getDescription());
holder.rupees.setText("Pkr. " + comparisonDataList.get(position).getRupees());
Picasso.get().load(comparisonDataList.get(position).getImage()).into(holder.image);
holder.likes.setText(comparisonDataList.get(position).getLikes() + "k Likes");
switch (comparisonDataList.get(position).getTitle()) {
case "Outfitters":
holder.title_image.setImageDrawable(ctx.getResources().getDrawable(R.drawable.outfitters_logo));
break;
case "ChenOne":
holder.title_image.setImageDrawable(ctx.getResources().getDrawable(R.drawable.chenone_logo));
break;
case "Breakout":
holder.title_image.setImageDrawable(ctx.getResources().getDrawable(R.drawable.breakout_logo));
break;
case "Khaadi":
holder.title_image.setImageDrawable(ctx.getResources().getDrawable(R.drawable.khaadi_logo));
break;
}
}
@Override
public int getItemCount() {
return comparisonDataList.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
CircleImageView title_image;
TextView title, description, rupees, likes, likes_tv, price_tv;
ImageView image;
public MyViewHolder(View itemView) {
super(itemView);
title = (TextView)itemView.findViewById(R.id.title);
title_image = (CircleImageView) itemView.findViewById(R.id.title_image);
description = (TextView)itemView.findViewById(R.id.description);
rupees = (TextView)itemView.findViewById(R.id.rupees);
image = (ImageView)itemView.findViewById(R.id.image);
likes = (TextView)itemView.findViewById(R.id.likes);
likes_tv = (TextView)itemView.findViewById(R.id.likes_tv);
price_tv = (TextView)itemView.findViewById(R.id.price_tv); //<--- Wants to set its value from dismissProgressBar()
}
}}
存储信息:
public class ComparisonResultRecyclerViewInfoStore {
String title, description, image, likes, rupees, type;
public ComparisonResultRecyclerViewInfoStore()
{
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public String getLikes() {
return likes;
}
public void setLikes(String likes) {
this.likes = likes;
}
public String getRupees() {
return rupees;
}
public void setRupees(String rupees) {
this.rupees = rupees;
}
}
回收站视图布局:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:cardCornerRadius="3dp"
app:cardElevation="3dp"
app:contentPadding="5dp"
app:cardUseCompatPadding="true">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="10dp">
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/title_image"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignParentLeft="true"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
app:civ_border_color="@color/item_checked"
app:civ_border_width="2dp"/>
<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="17dp"
android:layout_toEndOf="@+id/title_image"
android:paddingLeft="10dp"
android:text="Outfitters"
android:textColor="#fff"
android:textSize="14dp"
android:textStyle="bold" />
<TextView
android:id="@+id/likes_tv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="17dp"
android:layout_toEndOf="@+id/title"
android:paddingLeft="25dp"
android:text="Likes Textview"
android:textColor="#fff"
android:textSize="14dp"
android:textStyle="bold" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/sponsored_tv"
android:layout_below="@id/title"
android:layout_toEndOf="@+id/title_image"
android:paddingLeft="10dp"
android:text="Sponsored"
android:textColor="#fff" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/price_tv"
android:layout_below="@id/likes_tv"
android:layout_toEndOf="@+id/sponsored_tv"
android:paddingLeft="25dp"
android:text="Price Textview"
android:textColor="#fff"
android:textSize="14dp"
android:textStyle="bold"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/action_overflow"
android:layout_marginTop="17dp"
android:layout_marginRight="10dp"
android:background="@drawable/ic_action_overflow"
android:layout_alignParentRight="true"
/>
<TextView
android:id="@+id/description"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/title_image"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:layout_marginTop="10dp"
android:text="Hello World"
android:textColor="#fff" />
<ImageView
android:id="@+id/image"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_below="@+id/description"
android:layout_marginTop="10dp"
android:adjustViewBounds="true"
android:background="#dfe1ee"
android:scaleType="centerCrop" />
<TextView
android:id="@+id/likes"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/image"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:text="Hello World"
android:textColor="#fff" />
<TextView
android:id="@+id/rupees"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/image"
android:layout_marginTop="10dp"
android:layout_marginRight="10dp"
android:gravity="right"
android:text="Hello World"
android:textColor="#fff"
/>
</RelativeLayout>
</android.support.v7.widget.CardView>
在一个活动中,在将所有数据加载到回收器视图中后,我将检查dismissProgressBar(),在该视图中检查品牌商品的最低价格。我有需要设置其price_tv值的商品的位置,但是我不知道如何从活动中进行设置。
public void dismissProgressBar()
{
SalesRecyclerViewAdapter.progressDialog.dismiss();
for(int i=0; i<comparisonList.size(); i++)
{
priceList.add(parseDouble(comparisonList.get(i).getRupees()));
Toast.makeText(this, comparisonList.get(i).getTitle()+"---"+comparisonList.get(i).getRupees(), Toast.LENGTH_SHORT).show();
}
int min_price_index = priceList.indexOf(Collections.min(priceList));
}
有帮助吗? price_tv不是来自数据库。它是静态的,我想在获得最低价格商品的索引时设置其值。
答案 0 :(得分:1)
让我帮助您理解问题,然后自己解决问题。
假设 我在recyclerview中,假设我要更新recyclerview的第三项。我需要做的就是获取在recyclerview中使用的项目列表,即myList。
现在是时候更新视图了,我将抓住myList.get(3)
项目并更新其中的值。
在您的情况下为ComparisonResultRecyclerViewInfoStore
,因此代码为:
ComparisonResultRecyclerViewInfoStore thirdItem = myList.get(3);
thirdItem.setRupees(newValue);
///现在是时候让recyclerview知道我已经更改了第三项,以便Recyclerview可以更新视图。为此
yourAdapter.notifyItemChanged(3);
,我们完成了卢比值的更新。价格值和所有其他值也一样。请记住,您正在bindView方法中使用此值,即
holder.price_tv.setText(myList.get(holder.getAdapterPosition()).getPrice());
如果您只想为一项设置值,而对其他项则设置为静态,则在其上方进行检查:
if(holder.getAdapterPosition()== min_price_index){
holder.price_tv.setText(lowest price value);
}else{
holder.price_tv.setText("");
}
希望这会对您有所帮助。
答案 1 :(得分:0)
您必须更新适配器内的数据。例如:
您的活动中:
yourAdapter.refreshData(i, obj);
在您的适配器中
public void refreshData(int i, myObject obj) {
this.myList.set(i, obj);
notifyDataSetChanged();
}