Question

我对listview有疑问;我在两个片段中创建了两个ListView，以便在同一个Layout

中显示它们

当我从左侧ListView中选择一个项目时，会根据所选项目自动刷新右侧ListView。问题是，当我从右侧ListView中选择一个项目时，它会将颜色更改为绿色，这样就可以了，因为我以这种方式编程，如果我选择另一个项目，它也必须更改为绿色，并且保留第一个选定项目的原始颜色，就像我在下面的图片中显示的那样

First selection

但是当我滚动左侧ListView以选择另一个项目，并且我返回到列表顶部时，所选项目的状态已经消失，如下所示

The new view, without keep the state selected

我知道原因是因为列表视图回收了它的项目视图，但是我尝试了许多事情来尝试保持状态，无论我滚动列表，但我无法实现这一点目标。在这一点上，我不知道我必须从我的代码中改变什么;我告诉你重要的部分;如果您需要更多信息，请通过我的代码告诉我。

ListItem的构造函数：

    public class Lista_Item {
        private String color, texto;
        private String textoSuperior, textoInferior;
        boolean seleccionado = false;

    public Lista_Item(String color, String textoSuperior, String textoInferior, boolean seleccionado) {
        // TODO Auto-generated constructor stub
        this.color = color;
        this.textoSuperior = textoSuperior;
        this.textoInferior = textoInferior;
        this.seleccionado = seleccionado;
    }

    public Lista_Item(String color, String texto) {
        // TODO Auto-generated constructor stub
        this.color = color;
        this.texto = texto;
    }

    public String getTextoSuperior() {
        return textoSuperior;
    }

    public String getTextoInferior() {
        return textoInferior;
    }

    public boolean getSeleccionado() {
        return seleccionado;
    }

    public String getTexto() {
        return texto;
    }

    public String getColor() {
        return color;
    }


    public void setSeleccionado(boolean seleccionado) {
          this.seleccionado = seleccionado;
         }



}

适配器：

private class ListAdapter extends  ArrayAdapter<Lista_Item> {

private int mResourceId = 0;
private LayoutInflater mLayoutInflater;

public ListAdapter(Context context, int resource, int textViewResourceId, ArrayList<Lista_Item> listaItem) {
    super(context, resource, textViewResourceId, listaItem);
    mResourceId = resource;
    mLayoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}


@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    ViewHolder holder = null;

    if (convertView == null) {

        convertView = mLayoutInflater.inflate(mResourceId, parent, false);
        holder = new ViewHolder();

        holder.name = (TextView) convertView.findViewById(R.id.tvItemListaColor);
        holder.l = (LinearLayout)convertView.findViewById(R.id.layoutColor);

        convertView.setTag(holder);
    }else{
        holder = (ViewHolder) convertView.getTag();
    }

    Lista_Item pedido = listItems.get(position);
    holder.name.setText(pedido.getTexto());
    holder.l.setBackgroundColor(Color.parseColor(pedido.getColor()));
    holder.name.setTag(pedido);

    return convertView;
}

private class ViewHolder {
    TextView name;
    LinearLayout l;
}

}

事件OnItemClickListener：

public AdapterView.OnItemClickListener d = new AdapterView.OnItemClickListener(){
    @Override
    public void onItemClick(AdapterView<?> list, View view, int pos, long id) {
        // TODO Auto-generated method stub

    if(listener!=null){
        listener.onPedidoSeleccionado((Lista_Item)list.getAdapter().getItem(pos));
    }

    String[] item = parts[pos].split("!");
    Toast.makeText(getActivity(), "Ha pulsado el item " +item[0], Toast.LENGTH_SHORT).show();
    Log.d("Color","Color = "+colorSaved);

    if (currentSelectedView != null && currentSelectedView != view) {
        unhighlightCurrentRow(currentSelectedView, colorSaved);
        colorSaved = item[1];
    }

    currentSelectedView = view;
    highlightCurrentRow(currentSelectedView);
    colorSaved = item[1];
}

};

我上面使用的方法：

private void unhighlightCurrentRow(View rowView, String color) {
        rowView.setBackgroundColor(Color.parseColor("#"+color));
    }

    private void highlightCurrentRow(View rowView) {
        rowView.setBackgroundColor(Color.GREEN);

    }

请，任何帮助???

Answer 1

创建一个对象来设置一个arrayList，这个对象就像这样

String[] classes = {"Mage", "Warrior", "Ranger"};
JComboBox<String>charClass = new JComboBox<String>(classes);
JButton STRplus = new JButton("+");
JButton STRminus = new JButton("-");
JButton CONplus = new JButton("+");
JButton CONminus = new JButton("-");
JButton DEXplus = new JButton("+");
JButton DEXminus = new JButton("-");
JButton INTELplus = new JButton("+");
JButton INTELminus = new JButton("-");
String[] bonusAtt = {"Strength", "Constitution", "Dexterity",
"Intelligence"};
JComboBox<String>humanAtt = new JComboBox<String>(bonusAtt);

然后在你的活动中像这样，并将数组传递给适配器

 `public class FormaPagoVO {

    String id;
    Boolean anadir; 
    create the variables do you want whit getter and setter.....
    public Boolean getAnadir() {
        return anadir;
    }

    public void setAnadir(Boolean anadir) {
        this.anadir = anadir;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }
}`

在适配器的getView中

 List<FormaPagoVO> arrayForma = new ArrayList<FormaPagoVO>();
  FormaPagoAdapter adapterDos = new FormaPagoAdapter(getApplicationContext(),arrayForma);
 listViewForma.setAdapter(adapterDos);

点击列表视图

 if(getItem(position).getAnadir()){ // validate if check de listview or not and change de background
            imgClientes.setBackgroundResource(R.drawable.seleccion1);
        }else{
            imgClientes.setBackgroundResource(R.drawable.seleccion);
        }

那就是

当我滚动列表时，如何将状态保存在ListView（如所选项目）中？

1 个答案: