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从ListView获取EditText值

列表视图安卓安卓edittext 安卓arrayadapter

我试图从ListView中的EditText中获取值，但它不起作用。在afterTextChanged方法中为我的"lista"数组设置的值显然丢失了。我是android编程新手，有人能帮我吗？（很抱歉英语不好）以下是适配器中getView的代码：

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

final int posicao = position;

if (convertView == null) {
        LayoutInflater inflater = contexto.getLayoutInflater();
        convertView = inflater.inflate(R.layout.produtos, null);
        holder = new ViewHolder();
        holder.texto = (TextView) convertView.findViewById(R.id.txtDescricao);
        holder.checkbox = (CheckBox) convertView.findViewById(R.id.chkProduto);
        holder.edit = (EditText) convertView.findViewById(R.id.txtValor);
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }
    holder.texto.setText(getItem(position).getTexto());

holder.edit.setText("0");
    holder.edit.setTag(new LinhaItemTag(getItem(position), position));

//here a get an exception just setting the focus on edit
holder.edit.setOnFocusChangeListener(new OnFocusChangeListener() {
        public void onFocusChange(View v, boolean hasFocus) {
            int posicao = v.getId();
            EditText e = ((EditText) v);
            if (!e.getText().toString().equals("")) {
                if (hasFocus) {
                    if(e.getText().toString().length() != 0)
                        lista.get(posicao).setValor(Double.parseDouble(e.getText().toString()));
                }
            }

}
    });

holder.edit.addTextChangedListener( new TextWatcher() {

public void afterTextChanged(Editable s)
        {

if(s.length() != 0) 
            {
                lista.get(posicao).setValor(Double.parseDouble(s.toString()));              
            }

}

@Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {
            // TODO Auto-generated method stub

}

@Override
        public void onTextChanged(CharSequence s, int start, int before,
                int count) {
            // TODO Auto-generated method stub

}
    });

holder.checkbox.setOnCheckedChangeListener(null);
    holder.checkbox.setChecked(getItem(position).Selecionado());
    holder.checkbox.setTag(new LinhaItemTag(getItem(position), position));

holder.checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

@Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            LinhaItemTag elemento = (LinhaItemTag) buttonView.getTag();
            elemento.item.setSelecionado(isChecked);

if (isChecked) {
                pegos[elemento.position] = true;                
            } else {
                pegos[elemento.position] = false;
            }
            boolean checados = true;
            for (int i = 0; i < lista.size(); i++) {
                if (!pegos[i]) {
                    checados = false;
                    break;
                }
            }
            if (checados) {
                for(int i = 0; i < lista.size(); i++)
                {                   
                    total += lista.get(i).getValor();
                }
                Toast.makeText(contexto, "Compra finalizada - Valor Total: " + total, Toast.LENGTH_LONG).show();
            }
        }
    });

return convertView;
}

}

我设法从EditText中获得了值查看这篇文章：如何从ListView中的所有EditText中检索值现在，我面临着另一个问题：当我向下滚动列表时，EditText中的值丢失了。这就像我的代码现在的样子：

public class MeuAdapter extends ArrayAdapter<LinhaItem> {

private final List<LinhaItem> lista;
private final Activity contexto;
private final boolean[] pegos;
private final double[] valores;
double total;

public MeuAdapter(Activity contexto, List<LinhaItem> lista) {
    super(contexto, 0, lista);
    this.contexto = contexto;
    this.lista = lista;
    pegos = new boolean[lista.size()];
    valores = new double[lista.size()];
    for (int i = 0; i < lista.size(); i++) {
        pegos[i] = false;
        valores[i] = 0;
    }
    total = 0;
}

public class ViewHolder
{
    protected TextView texto;
    protected CheckBox checkbox;
    protected EditText edit;
}

public class LinhaItemTag {

LinhaItem item;
    int position;

LinhaItemTag(LinhaItem item, int position) {
        this.item = item;
        this.position = position;
    }
}

private class MeuTextWatcher implements TextWatcher {

private View v;

public MeuTextWatcher(View v)
    {
        this.v = v;     
    }

@Override
    public void afterTextChanged(Editable e) {
        String s = e.toString();
        LinhaItemTag lTag = (LinhaItemTag) v.getTag();      
        if(s.length() != 0)
        {           
            valores[lTag.position] = Double.parseDouble(s);         
        }
    }

@Override
    public void beforeTextChanged(CharSequence s, int start, int count,
            int after) {
        // TODO Auto-generated method stub

}

@Override
    public void onTextChanged(CharSequence s, int start, int before,
            int count) {
        // TODO Auto-generated method stub

}

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

holder.edit.setText("");
    holder.edit.setTag(new LinhaItemTag(getItem(position), position));

holder.edit.addTextChangedListener(new MeuTextWatcher(holder.edit));

holder.checkbox.setOnCheckedChangeListener(null);
    holder.checkbox.setChecked(getItem(position).Selecionado());
    holder.checkbox.setTag(new LinhaItemTag(getItem(position), position));

holder.checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

if (isChecked) {
                pegos[elemento.position] = true;                
            } else {
                pegos[elemento.position] = false;
            }
            boolean checados = true;
            for (int i = 0; i < lista.size(); i++) {
                if (!pegos[i]) {
                    checados = false;
                    break;
                }
            }
            String vlrs = "";
            if (checados) {
                for(int i = 0; i < lista.size(); i++)
                {                   
                    total += valores[i];                    
                }
                Toast.makeText(contexto, "Total da compra: " + total, Toast.LENGTH_LONG).show();
            }
        }
    });

return convertView;
}

}

我更改行：

收件人：

但这并不像我预期的那样工作，例如，如果我将一个值设置为ListView第一行的EditText，那么在我向下滚动列表后，该值将设置为列表第三行的EditText。。。

发布日期：2012-12-25

回答：1

您好，您可以使用下面的代码来实现这一点，listview无法保存行上的控制器状态，因此您需要使用控件的settag和gettag。

来源：https://dl.dropbox.com/u/68130108/ListViewEditItem.rar

回答：2

从EditText 在您的ListView, 你可以在活动中这样做。你一定需要一些视图点击或其他东西上的值。因此，每当发生这种情况时，只需编写以下代码

在这里，上面的代码将为您提供EditText 这是存在于position 你的职位ListView. 当所有文本都被选中时，您似乎需要编辑文本值的总和，对吗？你可以用这样的东西

回答：3

适配器类getView()方法的更改如下所示。

@Override
public View getView(final int position, View view, ViewGroup parent) {

TextView txt_id, txt_courny_symbol, txt_member_view;
    EditText edit_member_amount;

final int posicao = position;
    Log.v("ConvertView", String.valueOf(posicao));

inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    view = inflater.inflate(R.layout.list_member_layout, null);
    txt_id = (TextView) view.findViewById(R.id.txt_id);
    txt_courny_symbol = (TextView) view.findViewById(R.id.txt_courny_symbol);
    edit_member_amount = (EditText) view.findViewById(R.id.edit_member_amount);

edit_member_amount.setTag(new LinhaItemTag(getItem(posicao), posicao));
    edit_member_amount.addTextChangedListener(new MeuTextWatcher(edit_member_amount));

if (al_contact.size() != 0) {
        MemberClass memberClass = al_contact.get(position);
        txt_id.setText(memberClass.getName());
        txt_courny_symbol.setText(sym);
    }

return view;

}

删除ViewHolder类中的

回答：4

从EditText中丢失值可能会让人恼火。我在工作中找到了这个解决方案。

在android清单中，选择列表视图所在的活动。然后把这个代码块放在那里。

然后去你的办公室ListView, 然后导航到xml布局并将此块放在那里。

从ListView获取EditText值

回答：1

回答：2

回答：3

回答：4

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