java - Making RecyclerView return a unique array in every view from SQLITE database

Question

@Override
public void onBindViewHolder(@NonNull final ViewHolder holder, int position) {

MyDB db = new MyDB(mContext);

ArrayList<String> images1=db.getCollection(1); // Returns 2 image URIs in an array
ArrayList<String> images2=db.getCollection(2); // 0 images
ArrayList<String> images3=db.getCollection(3); // 2 images
ArrayList<String> images4=db.getCollection(4); // 10 images
ArrayList<String> images5=db.getCollection(5); // 5 images
ArrayList<String> images6=db.getCollection(6); // 12 images

//Maximum 12 images per collection

I've tried:

for(int i=0;i<images1.size();i++){

String path1=images1.get(i);
holder.img1.setImageURI(Uri.parse(path1));

}

for(int j=0;j<images2.size();j++){

String path2=images2.get(i);
holder.img2.setImageURI(Uri.parse(path2));

}

for(int k=0;k<images3.size();k++){

String path3=images3.get(i);
holder.img3.setImageURI(Uri.parse(path3));

}

//Sets each view the same, of course.

How do I get recyclerview to assign each view to a different collection of 12 images(or less)?

Since the collection can grow in size, is there another way to get unique images(upto 12) into each view of RecyclerView?

标签： javaandroidandroid-layoutandroid-recyclerviewcustom-adapter

Answer 1

在 bindViewHolder 中返回一个位置元素，您可以在其中使用它。第一个您必须获取 12 个 ImageView 并将它们分配到一个 imageView 数组中。让它采取imgs[]

  @Override
public void onBindViewHolder(@NonNull final ViewHolder holder, int position) {

MyDB db = new MyDB(mContext);

ArrayList<String> images1=db.getCollection(position);
for(int i=0;i<images1.size();i++){
    String path1=images1.get(i);
    holder.imgs[i].setImageURI(Uri.parse(path1));

}
@override
int getItemCount(){
    return 6;
}