Question

我在回收器视图中切换按钮我在共享首选项中保存布尔值，以识别是否在每次重新启动应用程序时按下切换按钮现在问题是当我点击一个1切换按钮并关闭应用程序时，每个切换按钮对于关闭按钮都是相同的事情，切换按钮和回收器视图之间没有位置连接这里是我的代码

 @Override
public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View v= LayoutInflater.from(parent.getContext()).inflate(R.layout.model,null);

    MyHolder holder=new MyHolder(v);
    SharedPreferences sharedPrefs = c.getSharedPreferences("lol", MODE_PRIVATE);
    Boolean a = sharedPrefs.getBoolean("abc" , false);
    if(a) {
        holder.fav.setBackgroundDrawable(ContextCompat.getDrawable(c, R.drawable.star_light));
        holder.fav.setChecked(true);
    } else {
        holder.fav.setBackgroundDrawable(ContextCompat.getDrawable(c, R.drawable.star_off));
        holder.fav.setChecked(false);
    }
    return holder;
}

@Override
public void onBindViewHolder(final MyHolder holder, final int position) {
    holder.nameTxt.setText(players[position]);
    holder.posTxt.setText(positions[position]);
    holder.img.setImageResource(images[position]);
    holder.fav.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if(isChecked) {
               holder.fav.setBackgroundDrawable(ContextCompat.getDrawable(c,R.drawable.star_light));
            SharedPreferences.Editor editor = c.getSharedPreferences("lol", MODE_PRIVATE).edit();
            editor.putBoolean("abc", true);
            editor.commit();
            } else {
                holder.fav.setBackgroundDrawable(ContextCompat.getDrawable(c, R.drawable.star_off));
                SharedPreferences.Editor editor = c.getSharedPreferences("lol", MODE_PRIVATE).edit();
                editor.putBoolean("abc", false);
                editor.commit();
            }
        }
    });

Answer 1

您的实施是错误的。

您应该只使用onCreateViewHolder()来扩充布局。

绑定操作应该在onBindViewHolder()中。在onBindViewHolder()

中使用切换操作

Answer 2

我做了一个快速编辑。请详细检查。我在position中使用了SharedPreferences。因此每个toggle button值保存在不同的密钥中。这可能有用。

SharedPreferences.Editor editor = c.getSharedPreferences("lol", MODE_PRIVATE).edit();

@Override
public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View v= LayoutInflater.from(parent.getContext()).inflate(R.layout.model,null);

    MyHolder holder=new MyHolder(v);

    return holder;
}


@Override
public void onBindViewHolder(final MyHolder holder, final int position) {


    holder.nameTxt.setText(players[position]);
    holder.posTxt.setText(positions[position]);
    holder.img.setImageResource(images[position]);

    SharedPreferences sharedPrefs = c.getSharedPreferences("lol", MODE_PRIVATE);
        Boolean a = sharedPrefs.getBoolean("abc"+position , false);
        if (a){
            holder.fav.setBackgroundDrawable(ContextCompat.getDrawable(c, R.drawable.star_light));
            holder.fav.setChecked(true);

        }else {
            holder.fav.setBackgroundDrawable(ContextCompat.getDrawable(c, R.drawable.star_off));
            holder.fav.setChecked(false);

        }

    holder.fav.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

            if (isChecked){
                holder.fav.setBackgroundDrawable(ContextCompat.getDrawable(c,R.drawable.star_light));

            editor.putBoolean("abc"+position, true);
            editor.commit();
            }
            else{
                holder.fav.setBackgroundDrawable(ContextCompat.getDrawable(c, R.drawable.star_off));

                editor.putBoolean("abc"+position, false);
                editor.commit();

            }
        }
    });

Answer 3

它有效，谢谢你，这是正确的答案

 @Override
public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View v= LayoutInflater.from(parent.getContext()).inflate(R.layout.model,null);

    MyHolder holder=new MyHolder(v);

    return holder;
}


@Override
public void onBindViewHolder(final MyHolder holder, final int position) {


    holder.nameTxt.setText(players[position]);
    holder.posTxt.setText(positions[position]);
    holder.img.setImageResource(images[position]);
    SharedPreferences sharedPrefs = c.getSharedPreferences("lol", MODE_PRIVATE);
    Boolean a = sharedPrefs.getBoolean("abc" + position, false);
    if (a){
        holder.fav.setBackgroundDrawable(ContextCompat.getDrawable(c, R.drawable.star_light));
        holder.fav.setChecked(true);

    }else {
        holder.fav.setBackgroundDrawable(ContextCompat.getDrawable(c, R.drawable.star_off));
        holder.fav.setChecked(false);

    }


    holder.fav.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

            if (isChecked){
                holder.fav.setBackgroundDrawable(ContextCompat.getDrawable(c,R.drawable.star_light));
            SharedPreferences.Editor editor = c.getSharedPreferences("lol", MODE_PRIVATE).edit();
            editor.putBoolean("abc" + position, true);
            editor.commit();
            }
            else{
                holder.fav.setBackgroundDrawable(ContextCompat.getDrawable(c, R.drawable.star_off));
                SharedPreferences.Editor editor = c.getSharedPreferences("lol", MODE_PRIVATE).edit();
                editor.putBoolean("abc" + position, false);
                editor.commit();

            }
        }
    });

在RecyclerView中切换按钮位置

3 个答案: