android - 在 ListView 中查找 ImageView 的位置

Question

我有一个 ListView ，我通过 mysql 数据库填充行。

这是我所做的 View :

您看到的这个名字来 self 的数据库，PLAY ImageView 来 self 在每一行中显示的布局列表(当我将名字添加到我的数据库时)。

现在我的问题是当我为那个播放按钮设置一个点击监听器时，(目的是将它切换到暂停 ImageView 等)它也改变了另一行的另一个播放按钮，但不是全部他们中的。因此我想我没有得到这个职位，对吧？你能帮我解决这个问题吗？

这是我的 fragment :

public class XXXUpdatesFragment extends Fragment implements AsyncResponse
,AdapterView.OnItemClickListener{

    View view ;
    private ArrayList<Product> productList;
    private ListView lvProduct;
    private FunDapter<Product> adapter;


    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.xxx_updates_layout, container, false);
        ImageLoader.getInstance().init(UILConfig.config(getActivity()));

        lvProduct = (ListView)view.findViewById(R.id.lvProduct);

        PostResponseAsyncTask taskRead = new PostResponseAsyncTask(getActivity(), this);

        taskRead.execute("http://symphonyrecords.6te.net/product.php");

        return view;
    } //onCreate


    @Override
    public void  processFinish(String s) {
        productList = new JsonConverter<Product>().toArrayList(s, Product.class);

        BindDictionary<Product> dict = new BindDictionary<Product>();
        dict.addStringField(R.id.tvName, new StringExtractor<Product>() {
            @Override
            public String getStringValue(Product product, int position) {
                return product.name;
            }
        });

        dict.addStringField(R.id.tvDescription, new StringExtractor<Product>() {
            @Override
            public String getStringValue(Product product, int position) {
                return product.description;   
            }
        });

        dict.addStringField(R.id.tvQty, new StringExtractor<Product>() {
            @Override
            public String getStringValue(Product product, int position) {
                return "" + product.qty;
            }
        });


        adapter = new FunDapter<>(getActivity(), productList, R.layout.d_layout_list_d, dict);


        lvProduct.setAdapter(adapter);
        lvProduct.setOnItemClickListener(this);

    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        Product selectedProduct = productList.get(position);
        Toast.makeText(getActivity(),selectedProduct.name+"", Toast.LENGTH_SHORT).show();
       }


    }

这是我的产品类:

public class Product implements Serializable {
@SerializedName("pid")
public int pid;

@SerializedName("name")
public String name;

@SerializedName("qty")
public int qty;

@SerializedName("price")
public String description;
}

这是我的适配器:

public class FunDapter<T> extends BaseAdapter implements Filterable {



private boolean paused = true;


protected List<T> mDataItems;
protected List<T> mOrigDataItems;
protected LongExtractor<T> idExtractor;
protected final Context mContext;
private final int mLayoutResource;
private final BindDictionary<T> mBindDictionary;
private int oddColorRes;
private int evenColorRes;
private FunDapterFilter<T> funDapterFilter;
private Filter mFilter;


public FunDapter(Context context, List<T> dataItems, int layoutResource,
                 BindDictionary<T> dictionary) {
  this(context, dataItems, layoutResource, null, dictionary);
}

public FunDapter(Context context, List<T> dataItems, int layoutResource,
                 LongExtractor<T> idExtractor, BindDictionary<T> dictionary) {
    this.mContext = context;
    this.mDataItems = dataItems;
    this.mOrigDataItems = dataItems;
    this.mLayoutResource = layoutResource;
    this.idExtractor = idExtractor;
    this.mBindDictionary = dictionary;

}

public void updateData(List<T> dataItems) {
    this.mDataItems = dataItems;
    this.mOrigDataItems = dataItems;
    notifyDataSetChanged();
}

@Override
public int getCount() {
    if (mDataItems == null || mBindDictionary == null) return 0;

    return mDataItems.size();
}

@Override
public T getItem(int position) {
    return mDataItems.get(position);
}

@Override
public boolean hasStableIds() {
    if(idExtractor == null) return super.hasStableIds();
    else return true;
}

@Override
public long getItemId(int position) {
    if(idExtractor == null) return position;
    else return idExtractor.getLongValue(getItem(position), position);
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    View v = convertView;
    final GenericViewHolder holder;
    if (null == v) {
        LayoutInflater vi =
                (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = vi.inflate(mLayoutResource, null);
        holder = new GenericViewHolder();
        holder.root = v;


        holder.playPause=(ImageView)v.findViewById(R.id.playPause); 
        holder.playPause.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {

                        if (paused) {
                            holder.playPause.setImageResource(R.drawable.ic_pause);
                            paused=false;
                        }
                        else {
                            paused = true;
                            holder.playPause.setImageResource(R.drawable.ic_play);
                        }

            }});



        FunDapterUtils.initViews(v, holder, mBindDictionary);

        v.setTag(holder);


    } else {
        holder = (GenericViewHolder) v.getTag();
    }

    final T item = getItem(position);
    showData(item, holder, position);

    return v;
}


private void showData(T item, GenericViewHolder holder, int position) {

    if (oddColorRes > 0 && evenColorRes > 0) {
        if (position % 2 == 0) {
            holder.root.setBackgroundColor(mContext.getResources().getColor(evenColorRes));
        } else {
            holder.root.setBackgroundColor(mContext.getResources().getColor(oddColorRes));
        }
    }

    FunDapterUtils.showData(item, holder, position, mBindDictionary);
}

public FunDapter<T> setAlternatingBackground(int oddColorRes, int evenColorRes) {

    if (oddColorRes <= 0 || evenColorRes <= 0) {
        throw new IllegalArgumentException("Color parameters are illegal");
    }

    this.oddColorRes = oddColorRes;
    this.evenColorRes = evenColorRes;

    return this;
}

public void setIdExtractor(LongExtractor<T> idExtractor) {
    this.idExtractor = idExtractor;
}

@Override
public Filter getFilter() {
    return mFilter;
}

public void initFilter(FunDapterFilter<T> filter) {

    if (filter == null)
        throw new IllegalArgumentException("Cannot pass a null filter to FunDapter");

    this.funDapterFilter = filter;

    mFilter = new Filter() {

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {

            List<T> list = (List<T>) results.values;

            if (results.count == 0) {
                resetData();
            } else {
                mDataItems = list;
            }

            notifyDataSetChanged();
        }

        @Override
        protected FilterResults performFiltering(CharSequence constraint) {

            FilterResults results = new FilterResults();
            if (constraint == null || constraint.length() == 0) {

                results.values = mOrigDataItems;
                results.count = mOrigDataItems.size();
            } else {

                List<T> filter =
                        funDapterFilter.filter(constraint.toString(), mOrigDataItems);

                results.count = filter.size();
                results.values = filter;

            }

            return results;
          }
      };
  }

  public void resetData() {
      mDataItems = mOrigDataItems;
     }

  }

我已经为此苦苦挣扎了一个星期，如果你能帮助我，我将不胜感激。

Answer 1

    holder.playPause=(ImageView)v.findViewById(R.id.playPause); 
    holder.playPause.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {

                    if (paused) {
                        holder.playPause.setImageResource(R.drawable.ic_pause);
                        paused=false;
                    }
                    else {
                        paused = true;
                        holder.playPause.setImageResource(R.drawable.ic_play);
                    }

        }});

此 block 必须同时出现在 if 和 else 条件中。现在只有在创建 View 时才会正确附加监听器，而在重用 View 时代码无法附加监听器。

    if (v==null) {
        //that code
    } else {
        //that code 
    }