我有一个包含大量图像的Recyclerview。您可以通过更改gridlayoutmanager的跨度计数将列表从网格更改为列表，但每次在一个或另一个之间切换时，我的一些视图将变为不可见。如果我能在recyclerview中找到它们，我仍然可以点击它们。
用于更改范围计数的代码：
public void initViews() {
findViewById(R.id.photoGrid).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
gridLayoutManager.setSpanCount(3);
gridLayoutManager.requestLayout();
SharedPreferences sharedPref = mAct.getPreferences(Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putString("menuLayout", "grid");
editor.apply();
}
});
findViewById(R.id.photoList).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
gridLayoutManager.setSpanCount(1);
gridLayoutManager.requestLayout();
SharedPreferences sharedPref = mAct.getPreferences(Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putString("menuLayout", "list");
editor.apply();
}
});
}
项目布局：
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:card_view="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/galleryTile"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:cardElevation="3dp"
app:cardUseCompatPadding="true"
card_view:cardPreventCornerOverlap="false">
<ImageView
android:id="@+id/galleryImageView"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:adjustViewBounds="true"
android:background="#E1E1E1"
android:scaleType="centerCrop"
android:src="@color/white" />
<!--android:src="@drawable/smittyplaceholder" />-->
</android.support.v7.widget.CardView>
适配器：
package com.ocv.starterpack.imagegallery;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.support.v7.widget.CardView;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Filter;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import com.bumptech.glide.Glide;
import com.bumptech.glide.request.RequestOptions;
import com.ocv.starterpack.OCVItem;
import com.ocv.starterpack.R;
import java.io.File;
import java.util.ArrayList;
public class ImageGalleryAdapter extends RecyclerView.Adapter<ImageGalleryAdapter.CustomViewHolder> {
//Basic concept: grab blog items, strip out images, load images into recycler, allow a detail view with zooming and the like
//pretty straightforward no?
//this is the recycler adapter
protected Context mContext;
//showDate = 2, shows date and time
//show date = 1, shows date exclusively
//show date = 0, shows neither date nor time
protected int showDate = 2;
protected Activity mAct;
protected RequestOptions options = new RequestOptions().error(R.drawable.nopicture);
protected Bitmap bitmap;
protected File file;
private ArrayList<OCVItem> feedItemList;
private ArrayList<OCVItem> feedItemListCopy;
ImageGalleryAdapter(Context context, Activity mAct, ArrayList<OCVItem> items) {
this.feedItemList = items;
this.mContext = context;
this.mAct = mAct;
feedItemListCopy = feedItemList;
}
@Override
public int getItemViewType(int position) {
return super.getItemViewType(position);
}
@Override
public CustomViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.image_gallery_item, null);
return new CustomViewHolder(view);
}
//I wanted to get rid of this position in the constructor, but I cannot override the constructor
//without it so I'm using it regardless.
@Override
public void onBindViewHolder(final CustomViewHolder holder, final int position) {
final OCVItem item = feedItemList.get(position);
Glide.with(mContext).load(item.getLargeURL()).apply(options).thumbnail(.95f).into(holder.galleryImage);
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
ImageGalleryDetailDialog detailDialog = new ImageGalleryDetailDialog(mContext, feedItemList, mAct, position, showDate);
detailDialog.openImageDialog(feedItemList, position, mContext);
}
});
}
@Override
public int getItemCount() {
return feedItemList.size();
}
public class CustomViewHolder extends RecyclerView.ViewHolder {
CardView galleryView;
ImageView galleryImage;
public CustomViewHolder(View view) {
super(view);
this.galleryView = view.findViewById(R.id.galleryTile);
this.galleryImage = view.findViewById(R.id.galleryImageView);
}
}
public Filter getFilter() {
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
String charString = charSequence.toString().toLowerCase();
ArrayList<OCVItem> filteredList = new ArrayList<>();
if (charSequence.equals("")) {
feedItemList.clear();
filteredList.addAll(feedItemList);
}
for (OCVItem message : feedItemListCopy) {
if (message.getTitle().toLowerCase().contains(charString) || message.getCategories().contains(charString)) {
filteredList.add(message);
}
else {
ArrayList<String> categories = message.getCategories();
for (String category : categories) {
if (category.toLowerCase().contains(charString)) {
filteredList.add(message);
}
}
}
}
FilterResults filterResults = new FilterResults();
filterResults.values = filteredList;
return filterResults;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
feedItemList = (ArrayList<OCVItem>) filterResults.values;
notifyDataSetChanged();
}
};
}
}
答案 0 :(得分：0)
在这个问题上经过很多天，我发现在下面的答案中发布的内容是我正在做的事情的解决方案。