问题描述
我制作了一个回收站视图以显示和选择Instagram帖子,在回收站视图适配器中,我处理了onclick以向用户显示是否选择了项目并处理了选定的帖子的总和...但是当适配器中的insta帖子变为当我滚动页面超过12时,某些选定项目显示为未选定,而某些未选定的帖子看起来就像您选择了它们!谁能帮我 ? 这是我的适配器:
package com.example.pinstagram.adaptor;
import android.content.Context;
import android.os.Build;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.example.pinstagram.R;
import com.example.pinstagram.classes.BuyBasketFlow;
import com.example.pinstagram.classes.InstaPosts;
import com.example.pinstagram.classes.SellingItems;
import com.example.pinstagram.viewHolders.InstaPostsRecyclerViewHolders;
import com.squareup.picasso.Picasso;
import java.util.ArrayList;
import java.util.List;
public class InstaPostsRecyclerViewAdapter extends RecyclerView.Adapter<InstaPostsRecyclerViewHolders> {
private List<InstaPosts> instaList;
private List<InstaPosts> selectedPosts;
LinearLayout linearLayout;
private Context context;
TextView numberTextView,eachPostPriceTxt,totalPriceTxt;
BuyBasketFlow buyBasketFlow;
SellingItems sellingItems;
public InstaPostsRecyclerViewAdapter(Context context,List<InstaPosts> itemList,List<InstaPosts> selectedPosts,LinearLayout linearLayout,TextView[] textViews) {
this.instaList = itemList;
this.context = context;
this.selectedPosts = selectedPosts;
this.linearLayout = linearLayout;
numberTextView = textViews[0];
eachPostPriceTxt = textViews [1];
buyBasketFlow = new BuyBasketFlow();
sellingItems = new SellingItems();
selectedPosts.clear();
for(int i = 0; i < instaList.size();i++){
instaList.get(i).setSelected(false);
}
linearLayout.setVisibility(View.GONE);
}
@NonNull
@Override
public InstaPostsRecyclerViewHolders onCreateViewHolder(ViewGroup parent,int viewType) {
View layoutView = LayoutInflater.from(parent.getContext()).inflate(R.layout.isnta_posts_listview,null);
InstaPostsRecyclerViewHolders crcv = new InstaPostsRecyclerViewHolders(layoutView);
return crcv;
}
@Override
public void onBindViewHolder(@NonNull final InstaPostsRecyclerViewHolders holder,final int position) {
holder.cardView.setonClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.i("Log3"," item number: " + position + " is clicked");
instaList.get(position).setSelected(!instaList.get(position).isSelected());
if(buyBasketFlow.getType().compareto("like")==0) {
if (instaList.get(position).isCanBeSelect()) {
selectingPhase(holder,position);
} else {
Toast.makeText(context,R.string.just_select_photo,Toast.LENGTH_SHORT).show();
Log.i("Log1",instaList.get(position).getTypename());
}
}else if(buyBasketFlow.getType().compareto("view")==0){
if (instaList.get(position).isViewCanBeSelected()) {
selectingPhase(holder,R.string.just_select_video,instaList.get(position).getTypename());
}
}else if(buyBasketFlow.getType().compareto("comment")==0){
if (instaList.get(position).isViewCanBeSelected()||instaList.get(position).isCanBeSelect()) {
selectingPhase(holder,instaList.get(position).getTypename());
}
}
}
});
Picasso.get().load(instaList.get(position).getThumbnail_url()).into(holder.instaimage);
}
public List<InstaPosts> getSelectedPosts(){
return selectedPosts;
}
@Override
public int getItemCount() {
return this.instaList.size();
}
private void selectingPhase(InstaPostsRecyclerViewHolders holder,int position){
if (instaList.get(position).isSelected()) {
selectedPosts.add(instaList.get(position));
buyBasketFlow.setPostsArrays(selectedPosts);
for (InstaPosts selected : selectedPosts) {
Log.e("Log1",selected.toString());
}
holder.radioBtn.setimageDrawable(context.getDrawable(R.drawable.radio_button_checked));
holder.cardView.setstrokeWidth(10);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
holder.cardView.setstrokeColor(context.getColor(R.color.colorPrimary));
}
} else {
selectedPosts.remove(instaList.get(position));
buyBasketFlow.setPostsArrays(selectedPosts);
for (InstaPosts selected : selectedPosts) {
Log.e("Log1",selected.toString());
}
holder.cardView.setstrokeWidth(0);
holder.radioBtn.setimageDrawable(context.getDrawable(R.drawable.radio_button_unchecked));
}
if (selectedPosts.size() < 1) {
linearLayout.setVisibility(View.GONE);
Log.i("Log1","layout must become invisible");
} else {
Log.i("Log1","layout must become visible");
linearLayout.setVisibility(View.VISIBLE);
sellingItems = buyBasketFlow.getSellingItem();
numberTextView.setText("" + selectedPosts.size());
Log.i("Log1","" + Integer.parseInt(sellingItems.getPrice()));
String text = "قیمت هر پست" + sellingItems.getPrice() + " تومان ";
String sum = Integer.toString((selectedPosts.size() * Integer.parseInt(sellingItems.getPrice())));
text = text + "و قیمت مجموع " + sum + " تومان ";
eachPostPriceTxt.setText(text);
}
}
}
解决方法
您每次都需要在onBindViewHolder上设置选定状态。
在onBindViewHolder中:
InstaPosts instaPosts = instaList.get(position);
holder.cardView.setStrokeWidth(instaPosts.isSelected() ? 10 : 0);
holder.radioBtn.setImageDrawable(context.getDrawable(instaPosts.isSelected() ? R.drawable.radio_button_checked : R.drawable.radio_button_unchecked));