从 RecyclerView 的适配器设置 ImageView 滤色器

Question

我实际上尝试在定义适配器和 recyclerView 的类中设置 imageView ColorFilter。为此，我在我的适配器中定义了一个 ImageView ArrayList，它从视图持有者中存储了我的图像视图，并且我也在我的适配器中使用带有位置参数的自定义方法来获取它们。但它并没有真正起作用，当我点击我的项目时，颜色过滤器会随机应用于我的 recyclerviex 项目：/

这是我的代码：

The adapter :

package com.ylly.hypred.process.adapter;

/**
 * Created by YLLY on 24/06/2015.
 */
import android.content.ContentResolver;
import android.content.Context;
import android.net.Uri;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import com.squareup.picasso.Picasso;
import com.ylly.hypred.process.recyclerView.ItemDataAtelier;
import com.ylly.hypred.R;
import com.ylly.hypred.custom.MyTextView;

import java.io.File;
import java.util.ArrayList;

public class AtelierAdapter extends RecyclerView.Adapter<AtelierAdapter.ViewHolder> {
    private ArrayList<ItemDataAtelier> itemsData;
    private Context context;

    public AtelierAdapter(ArrayList<ItemDataAtelier> itemsData, Context context) {
        this.itemsData = itemsData;
        this.context = context;
    }

    // Create new views (invoked by the layout manager)
    @Override
    public AtelierAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
                                                   int viewType) {
        // create a new view
        View itemLayoutView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.item_layout, null);

        // create ViewHolder

        ViewHolder viewHolder = new ViewHolder(itemLayoutView);
        return viewHolder;
    }

    // Replace the contents of a view (invoked by the layout manager)
    @Override
    public void onBindViewHolder(ViewHolder viewHolder, int position) {

        // - get data from your itemsData at this position
        // - replace the contents of the view with that itemsData

        Uri uri = Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + "://" + context.getPackageName() + "/drawable/" + itemsData.get(position).getDrawable());
        Picasso.with(context).load(R.drawable.hypred_atelier_atelier).into(viewHolder.imgViewIcon);
        viewHolder.nomAtelierTextView.setText(itemsData.get(position).getLabel());

    }

    // inner class to hold a reference to each item of RecyclerView
    public static class ViewHolder extends RecyclerView.ViewHolder {

        public ImageView imgViewIcon;
        public MyTextView nomAtelierTextView;

        public ViewHolder(View itemLayoutView) {
            super(itemLayoutView);
            imgViewIcon = (ImageView) itemLayoutView.findViewById(R.id.item_icon);
            nomAtelierTextView = (MyTextView) itemLayoutView.findViewById(R.id.item_layout_nom_atelier_textView);
        }
    }


    // Return the size of your itemsData (invoked by the layout manager)
    @Override
    public int getItemCount() {
        return itemsData.size();
    }
}

我的项目数据：

package com.ylly.hypred.process.recyclerView;

import android.graphics.drawable.Drawable;
import android.widget.ImageView;

/**
 * Created by YLLY on 07/07/2015.
 */
public class ItemDataCriteres {

    private String label;
    private int drawable;
    private Boolean isActive;
    private ImageView imageView;

    public void setIsActive(Boolean isActive) {
        this.isActive = isActive;
    }

    public Boolean getIsActive() {

        return isActive;
    }

    public ItemDataCriteres(String label, int drawable){

        this.label = label;

        this.drawable = drawable;
    }

    public void setLabel(String label) {
        this.label = label;
    }

    public String getNomAtelier() {

        return label;
    }

    public void setDrawable(int drawable) {
        this.drawable = drawable;
    }

    public int getDrawable() {

        return drawable;
    }


    public void setImageView(ImageView imageView) {
        this.imageView = imageView;
    }

    public ImageView getImageView() {

        return imageView;
    }

}

还有我定义 recyclerView 和更改过滤器的班级：

final CriteresAdapter criteresAdapter = new CriteresAdapter(itemDataDetailsEtThemes, v.getContext());
recyclerViewCriteresOne.setAdapter(criteresAdapter);

recyclerViewCriteresOne.addOnItemTouchListener(
        new RecyclerItemClickListener(context, new RecyclerItemClickListener.OnItemClickListener() {
            @Override
            public void onItemClick(View view, int position) {
                if (!criteresAdapter.getCritere(position).getIsActive()) {
                    criteresActifs[0]++;
                    setLancerRechercheTextViewVisibility(v);
                    criteresAdapter.getImageView(position).setColorFilter(v.getResources().getColor(R.color.hypred_gris), PorterDuff.Mode.MULTIPLY);
                    criteresAdapter.getCritere(position).setIsActive(true);
                    criteresAdapter.notifyDataSetChanged();
                } else {
                    criteresActifs[0]--;
                    setLancerRechercheTextViewVisibility(v);
                    criteresAdapter.getImageView(position).clearColorFilter();
                    criteresAdapter.getCritere(position).setIsActive(false);
                    criteresAdapter.notifyDataSetChanged();
                }
            }
        }));

提前感谢您的宝贵时间:)

Answer 1

来自 Drawable 文档：

默认情况下，从同一资源加载的所有可绘制实例共享一个公共状态；如果您修改了一个实例的状态，所有其他实例都将收到相同的修改。

答案是调用 Drawable.mutate()

一个可变的drawable保证不与任何其他drawable共享它的状态。

我会将您的 ItemTouchListener 更改为如下内容：

recyclerViewCriteresOne.addOnItemTouchListener(
    new RecyclerItemClickListener(context, new RecyclerItemClickListener.OnItemClickListener() {
        @Override
        public void onItemClick(View view, int position) {
            Drawable drawable = criteresAdapter.getImageView(position);
            drawable.mutate();
            if (!criteresAdapter.getCritere(position).getIsActive()) {
                criteresActifs[0]++;
                setLancerRechercheTextViewVisibility(v);
                drawable.setColorFilter(v.getResources().getColor(R.color.hypred_gris), PorterDuff.Mode.MULTIPLY);
                criteresAdapter.getCritere(position).setIsActive(true);
                criteresAdapter.notifyDataSetChanged();
            } else {
                criteresActifs[0]--;
                setLancerRechercheTextViewVisibility(v);
                drawable.clearColorFilter();
                criteresAdapter.getCritere(position).setIsActive(false);
                criteresAdapter.notifyDataSetChanged();
            }
        }
    }));