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我已經使用RecyclerView在我的圖像編輯應用程序中顯示縮略圖。它的每個項目都包含一個ImageView（縮略圖）和一個textView。在我的應用程序中，我想要僅突出顯示當前選中的點擊時縮略圖。通過所有相關的帖子上SO，但找不到更好的解決方案。如何突出顯示RecyclerView中的選定項目
我的適配器類別
public class FiltersAdapter extends RecyclerView.Adapter<FiltersAdapter.ViewHolder> {
private Context mContext;
private List<Type> mDataSet;
private Uri selectedPhoto;
public enum Type {
Original,
Grayscale,
Sepia,
Contrast,
Invert,
Pixel,
Sketch,
Swirl,
Brightness,
Vignette
}
public FiltersAdapter(Context context, List<Type> dataSet, Uri selectedPhoto) {
mContext = context;
mDataSet = dataSet;
this.selectedPhoto = selectedPhoto;
}
@Override
public FiltersAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(mContext).inflate(R.layout.list_item_layout, parent, false);
return new ViewHolder(v);
}
@Override
public void onBindViewHolder(FiltersAdapter.ViewHolder holder, int position) {
switch (mDataSet.get(position)) {
case Original:
holder.image.setImageResource(R.drawable.no_filter);
break;
case Grayscale:
Picasso.with(mContext)
.load(R.drawable.no_filter)
.transform(new GrayscaleTransformation())
.into(holder.image);
break;
case Sepia:
Picasso.with(mContext)
.load(R.drawable.no_filter)
.transform(new SepiaFilterTransformation(mContext))
.into(holder.image);
break;
case Contrast:
Picasso.with(mContext)
.load(R.drawable.no_filter)
.transform(new ContrastFilterTransformation(mContext, 2.0f))
.into(holder.image);
break;
case Invert:
Picasso.with(mContext)
.load(R.drawable.no_filter)
.transform(new InvertFilterTransformation(mContext))
.into(holder.image);
break;
case Pixel:
Picasso.with(mContext)
.load(R.drawable.no_filter)
.transform(new PixelationFilterTransformation(mContext, 20))
.into(holder.image);
break;
case Sketch:
Picasso.with(mContext)
.load(R.drawable.no_filter)
.transform(new SketchFilterTransformation(mContext))
.into(holder.image);
break;
case Swirl:
Picasso.with(mContext)
.load(R.drawable.no_filter)
.transform(new SwirlFilterTransformation(mContext, 0.5f, 1.0f, new PointF(0.5f, 0.5f)))
.into(holder.image);
break;
case Brightness:
Picasso.with(mContext)
.load(R.drawable.no_filter)
.transform(new BrightnessFilterTransformation(mContext, 0.5f))
.into(holder.image);
break;
case Vignette:
Picasso.with(mContext)
.load(R.drawable.no_filter)
.transform(new VignetteFilterTransformation(mContext, new PointF(0.5f, 0.5f),
new float[]{0.0f, 0.0f, 0.0f}, 0f, 0.75f))
.into(holder.image);
break;
default:
holder.image.setImageResource(R.drawable.no_filter);
break;
}
holder.title.setText(mDataSet.get(position).name());
}
@Override
public void onViewAttachedToWindow(ViewHolder holder) {
super.onViewAttachedToWindow(holder);
}
@Override
public int getItemCount() {
return mDataSet.size();
}
@Override
public int getItemViewType(int position) {
return position;
}
static class ViewHolder extends RecyclerView.ViewHolder {
public ImageView image;
public TextView title;
ViewHolder(View itemView) {
super(itemView);
image = (ImageView) itemView.findViewById(R.id.thumbnailImage);
title = (TextView) itemView.findViewById(R.id.title);
}
}
}
片段代碼
horizontalFilters = (RecyclerView) mView.findViewById(R.id.rvHorizontal);
LinearLayoutManager horizontalLayoutManagaer
= new LinearLayoutManager(getContext(), LinearLayoutManager.HORIZONTAL, false);
horizontalFilters.setLayoutManager(horizontalLayoutManagaer);
List<Type> dataSet = new ArrayList<>();
dataSet.add(Type.Original);
dataSet.add(Type.Grayscale);
dataSet.add(Type.Sepia);
dataSet.add(Type.Contrast);
dataSet.add(Type.Invert);
dataSet.add(Type.Pixel);
dataSet.add(Type.Sketch);
dataSet.add(Type.Swirl);
dataSet.add(Type.Brightness);
dataSet.add(Type.Vignette);
horizontalFilters.setAdapter(new FiltersAdapter(act, dataSet, selectedPhotoUri));
horizontalFilters.addOnItemTouchListener(new RecyclerClick(act, horizontalFilters, new RecyclerClickListener() {
@Override
public void onClick(View view, int position) {
switch (position){
case 0:
photo.setImageDrawable(drawable);
break;
case 1:
Picasso.with(act)
.load(selectedPhotoUri)
.transform(new GrayscaleTransformation())
.into(photo);
break;
case 2:
Picasso.with(act)
.load(selectedPhotoUri)
.transform(new SepiaFilterTransformation(act))
.into(photo);
break;
case 3:
Picasso.with(act)
.load(selectedPhotoUri)
.transform(new ContrastFilterTransformation(act, 2.0f))
.into(photo);
break;
case 4:
Picasso.with(act)
.load(selectedPhotoUri)
.transform(new InvertFilterTransformation(act))
.into(photo);
break;
case 5:
Picasso.with(act)
.load(selectedPhotoUri)
.transform(new PixelationFilterTransformation(act, 20))
.into(photo);
break;
case 6:
Picasso.with(act)
.load(selectedPhotoUri)
.transform(new SketchFilterTransformation(act))
.into(photo);
break;
case 7:
Picasso.with(act)
.load(selectedPhotoUri)
.transform(new SwirlFilterTransformation(act, 0.5f, 1.0f, new PointF(0.5f, 0.5f)))
.into(photo);
break;
case 8:
Picasso.with(act)
.load(selectedPhotoUri)
.transform(new BrightnessFilterTransformation(act, 0.5f))
.into(photo);
break;
case 9:
Picasso.with(act)
.load(selectedPhotoUri)
.transform(new VignetteFilterTransformation(act, new PointF(0.5f, 0.5f),
new float[]{0.0f, 0.0f, 0.0f}, 0f, 0.75f))
.into(photo);
break;
default:
photo.setImageDrawable(drawable);
break;
}
}
@Override
public void onLongClick(View view, int position) {
}
}));
}
你有任何clickListener或其他東西，以便你知道你選擇/點擊某些東西？ – Rahul
是的，我使用了一個定製的Listener ...你想讓我添加這個代碼嗎？ – musica
是否有可能將模式'public enum Type'更改爲'public class Type'作爲模型？ – Rahul