Android 滚动时取消选择的ListView项目

我遇到的问题是，当我开始滚动选择的项目时，它们被取消选择，我看到了其他一些关于这方面的帖子，其中一些据说被放入了一个数组中，但我尝试了一些，但似乎没有起作用

我的代码：

public class ListAdapter extends BaseAdapter {
Context ctx;
LayoutInflater lInflater;
ArrayList<Product> objects;


ListAdapter(Context context, ArrayList<Product> products) {
    ctx = context;
    objects = products;
    lInflater = (LayoutInflater) ctx
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}

@Override
public int getCount() {
    return objects.size();
}

@Override
public Object getItem(int position) {
    return objects.get(position);
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    View view = convertView;
    if (view == null) {
        view = lInflater.inflate(R.layout.item, parent, false);
    }

   final Product p = getProduct(position);

    ((TextView) view.findViewById(R.id.tvDescr)).setText(p.name);
    ((TextView) view.findViewById(R.id.tvPrice)).setText(p.price + "");
    ((ImageView) view.findViewById(R.id.ivImage)).setImageResource(p.image);

    final CheckBox cbBuy = (CheckBox) view.findViewById(R.id.cbBox);
    SharedPreferences settings  = ctx.getSharedPreferences("data",ctx.MODE_PRIVATE);
    boolean Checked = settings.getBoolean(p.name, false);
    cbBuy.setChecked(Checked);



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

            if(cbBuy.isChecked()==true){
                SharedPreferences settings = ctx.getSharedPreferences("data",Context.MODE_PRIVATE);
                settings.edit().putBoolean(p.name, true).commit();
                Toast.makeText(ctx, "You Selected" + p.name, Toast.LENGTH_SHORT).show();


            }else{
                SharedPreferences settings = ctx.getSharedPreferences("data", Context.MODE_PRIVATE);
                settings.edit().putBoolean(p.name, false).commit();
                Toast.makeText(ctx, "You Deselected" +p.name, Toast.LENGTH_SHORT).show();

            }
        }
    });{

        return view;

    }

}

Product getProduct(int position) {
    return ((Product) getItem(position));
}

ArrayList<Product> getBox() {
    ArrayList<Product> box = new ArrayList<Product>();
    for (Product p : objects) {
        if (p.box)
            box.add(p);
    }
    return box;
}

OnCheckedChangeListener myCheckChangList = new OnCheckedChangeListener() {
    public void onCheckedChanged(CompoundButton buttonView,
                                 boolean isChecked) {

        getProduct((Integer) buttonView.getTag()).box = isChecked;

    }


};
}

主要活动

public class MainActivity extends AppCompatActivity {

ArrayList<Product> products = new ArrayList<Product>();
ListAdapter boxAdapter;
private SharedPreferences mPrefs;
private String mData;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);
    fillData();
    boxAdapter = new ListAdapter(this, products);

    ListView lvMain = (ListView) findViewById(R.id.lvMain);
    lvMain.setAdapter(boxAdapter);

}

void fillData() {
    products.add(new Product("Al", "5230%", R.drawable.ic_launcher, false));
    products.add(new Product("Al", "5230%", R.drawable.ic_launcher, false));
    products.add(new Product("Alf", "5230%", R.drawable.ic_launcher, false));
    products.add(new Product("Alfa", "5230%", R.drawable.ic_launcher, false));
    products.add(new Product("Alfae", "5120%", R.drawable.ic_launcher, false));
    products.add(new Product("Alfsdfsdfakher", "50435%", R.drawable.ic_launcher, false));
    products.add(new Product("Alfasdfsdfkher", "5123120%", R.drawable.ic_launcher, false));
    products.add(new Product("Alfasdfsdfkher", "501231%", R.drawable.ic_launcher, false));
    products.add(new Product("Alfaksdfsdfher", "11250%", R.drawable.ic_launcher, false));
    /*for (int i = 1; i <= 20; i++) {
        products.add(new Product("Product " + i, i * 100,
                R.drawable.ic_launcher, false));
    }*/
}

/*public void showResult(View v) {
    String result = "Selected Product are :";
    int totalAmount=0;
    for (Product p : boxAdapter.getBox()) {
        if (p.box){
            result += "\n" + p.name;
            totalAmount+=p.price;
        }
    }
    Toast.makeText(this, result+"\n"+"Total Amount:="+totalAmount, Toast.LENGTH_LONG).show();
}*/
}

---

您可以在模型类中管理一个变量 像这样

public class Product
{
      private boolean isSelected=false;

      //Make ur getter and settter
}

适配器类

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    View view = convertView;
    if (view == null) {
        view = lInflater.inflate(R.layout.item, parent, false);
    }

   final Product p = getProduct(position);

    ((TextView) view.findViewById(R.id.tvDescr)).setText(p.name);
    ((TextView) view.findViewById(R.id.tvPrice)).setText(p.price + "");
    ((ImageView) view.findViewById(R.id.ivImage)).setImageResource(p.image);

    final CheckBox cbBuy = (CheckBox) view.findViewById(R.id.cbBox);
    SharedPreferences settings  = ctx.getSharedPreferences("data",ctx.MODE_PRIVATE);
    boolean Checked = settings.getBoolean(p.name, false);
    cbBuy.setChecked(Checked);

//use click listener instead of checked change
cbBuy.setOnClickListener(new View.OnClickListener()
{
    @Override
    public void onClick(View v)
    {
        if(objects.get(position).isSelected)
       {
              cbBuy.setChecked(false);
              objects.get(position).setSelected(false);

 //Save into sharepref here
 SharedPreferences settings = ctx.getSharedPreferences("data",Context.MODE_PRIVATE);
                settings.edit().putBoolean(p.name, false).commit();
                Toast.makeText(ctx, "You Selected" + p.name, Toast.LENGTH_SHORT).show();

       }
       else
       {
              cbBuy.setChecked(true);
              objects.get(position).setSelected(true);

//Save into sharepref here
  SharedPreferences settings = ctx.getSharedPreferences("data",Context.MODE_PRIVATE);
                settings.edit().putBoolean(p.name, true).commit();
                Toast.makeText(ctx, "You Selected" + p.name, Toast.LENGTH_SHORT).show();

       }

    }
});


//For scrolling issue use this
if(objects.get(position).isSelected)
       {
              cbBuy.setChecked(true);

       }
       else
       {
              cbBuy.setChecked(false);
       }

            return view;

        }

    }

---

希望这能帮助你……如果你有任何问题可以问

你应该使用ListView holder模式。类似于：在我的product类中，我已经有一个名为box的布尔值，我已经添加了上面的代码，以显示它在product类中的状态。另外，setselected将出现，因为无法解析方法setselected请提供任何帮助？private boolean isSelected=false；请你解释一下如何做这个，我不知道这是怎么做的？

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    View view = convertView;
    if (view == null) {
        view = lInflater.inflate(R.layout.item, parent, false);
    }

   final Product p = getProduct(position);

    ((TextView) view.findViewById(R.id.tvDescr)).setText(p.name);
    ((TextView) view.findViewById(R.id.tvPrice)).setText(p.price + "");
    ((ImageView) view.findViewById(R.id.ivImage)).setImageResource(p.image);

    final CheckBox cbBuy = (CheckBox) view.findViewById(R.id.cbBox);
    SharedPreferences settings  = ctx.getSharedPreferences("data",ctx.MODE_PRIVATE);
    boolean Checked = settings.getBoolean(p.name, false);
    cbBuy.setChecked(Checked);

//use click listener instead of checked change
cbBuy.setOnClickListener(new View.OnClickListener()
{
    @Override
    public void onClick(View v)
    {
        if(objects.get(position).isSelected)
       {
              cbBuy.setChecked(false);
              objects.get(position).setSelected(false);

 //Save into sharepref here
 SharedPreferences settings = ctx.getSharedPreferences("data",Context.MODE_PRIVATE);
                settings.edit().putBoolean(p.name, false).commit();
                Toast.makeText(ctx, "You Selected" + p.name, Toast.LENGTH_SHORT).show();

       }
       else
       {
              cbBuy.setChecked(true);
              objects.get(position).setSelected(true);

//Save into sharepref here
  SharedPreferences settings = ctx.getSharedPreferences("data",Context.MODE_PRIVATE);
                settings.edit().putBoolean(p.name, true).commit();
                Toast.makeText(ctx, "You Selected" + p.name, Toast.LENGTH_SHORT).show();

       }

    }
});


//For scrolling issue use this
if(objects.get(position).isSelected)
       {
              cbBuy.setChecked(true);

       }
       else
       {
              cbBuy.setChecked(false);
       }

            return view;

        }

    }