如何保持RecyclerView的按钮被分别单击-Android

概述我有一个用CardViews填充的RecyclerView.在每个CardViews上都有一个按钮,可对该帖子进行投票.这是未按下按钮时的外观,这是按下按钮时的外观,我的代码可以实现这一目标,但是由于它是RecyclerView,所以存在一个问题.当我向下滚动帖子时,RecyclerView会回收之前已投票的帖子.因此,

我有一个用CardVIEws填充的RecyclerVIEw.在每个CardVIEws上都有一个按钮,可对该帖子进行投票.

这是未按下按钮时的外观,

这是按下按钮时的外观,

我的代码可以实现这一目标,但是由于它是RecyclerVIEw,所以存在一个问题.当我向下滚动帖子时,RecyclerVIEw会回收之前已投票的帖子.因此,即使用户从未投票过,帖子也会显示它已被投票.

如何保持每个CardVIEw的按钮被分别按下？

这是我的适配器

public class discoverRecyclerAdapter        extends RecyclerVIEw.Adapter<discoverRecyclerAdapter.VIEwHolder> {    private String[] mDataset;    Typeface customFont;    // ProvIDe a reference to the vIEws for each data item    // Complex data items may need more than one vIEw per item, and    // you provIDe access to all the vIEws for a data item in a vIEw holder    public static class VIEwHolder extends RecyclerVIEw.VIEwHolder {        public TextVIEw mTitle;        public TextVIEw mVoterCounter;        public Imagebutton mVoterbutton;        public VIEwHolder(androID.support.v7.Widget.CardVIEw v) {            super(v);            mTitle = (TextVIEw) v.findVIEwByID(R.ID.Title);            mVoterCounter = (TextVIEw) v.findVIEwByID(R.ID.Voter_counter);            //Initialize Voter button            mVoterbutton = (Imagebutton)v.findVIEwByID(R.ID.Voter);            mVoterbutton.setonClickListener(new VIEw.OnClickListener() {                @OverrIDe                public voID onClick(VIEw v) {                    mVoterbutton.setimageResource(R.drawable.ic_Voter_pressed);                }            });        }    }    // ProvIDe a suitable constructor (depends on the kind of dataset)    public discoverRecyclerAdapter(String[] myDataset, Typeface passedFont) {        mDataset = myDataset;        customFont = passedFont;    }    // Create new vIEws (invoked by the layout manager)    @OverrIDe    public discoverRecyclerAdapter.VIEwHolder onCreateVIEwHolder(VIEwGroup parent,                                                   int vIEwType) {        // create a new vIEw        VIEw v = LayoutInflater.from(parent.getContext())                .inflate(R.layout.item_discover, parent, false);        // set the vIEw's size, margins, paddings and layout parameters        return new VIEwHolder((androID.support.v7.Widget.CardVIEw)v);    }    // Replace the contents of a vIEw (invoked by the layout manager)    @OverrIDe    public voID onBindVIEwHolder(VIEwHolder holder, int position) {        holder.mTitle.setText(mDataset[position]);        holder.mTitle.setTypeface(customFont);        holder.mVoterCounter.setTypeface(customFont);    }    // Return the size of your dataset (invoked by the layout manager)    @OverrIDe    public int getItemCount() {        return mDataset.length;    }}

解决方法:

与mDataset一起,您还需要一个布尔数组,例如mIsSelected
现在,它的大小将等于数组mDataSet的大小,或者根据需要创建类.

然后在onBindVIEwHolder中执行

 if(mIsSelected[position]  mVoterbutton.setimageResource(R.drawable.ic_Voter_pressed);else mVoterbutton.setimageResource(R.drawable.ic_Voter_unpressed);

并在onBindVIEwHolder内部移动按钮onclick,如下所示

 holder.mVoterbutton.setonClickListener(new VIEw.OnClickListener() {            @OverrIDe            public voID onClick(VIEw v) {              mVoterbutton.setimageResource(R.drawable.ic_Voter_pressed);              mIsSelected[position] = true;            }        });

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