不显示自定义列表视图

按照一些教程，我设法创建了自定义列表。不显示自定义列表视图

但整个画面只是一个列表

现在希望把下面的表单列表。并且为了使整个屏幕与列表一起滚动（参见列表中的最后一项，表格需要上升）

日志（Toasty）表示该项已添加，但没有任何显示。我不知道这个问题是我怎么加，或者是我试图显示

的方式这是我的布局：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:background="#ffffff" 
    android:fillViewport="true" 
    android:padding="5dp" > 

    <LinearLayout 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:orientation="vertical" > 

     <LinearLayout 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:orientation="vertical" > 

      <TextView 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:text="@string/cliente" /> 

      <EditText 
       android:id="@+id/venda_form_cliente" 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:cursorVisible="false" 
       android:focusable="false" 
       android:hint="@string/selecione_um_cliente" /> 
     </LinearLayout> 

     <LinearLayout 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:orientation="vertical" > 

      <TextView 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:text="@string/produto" /> 

      <EditText 
       android:id="@+id/venda_form_prod" 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:cursorVisible="false" 
       android:focusable="false" 
       android:hint="@string/selecione_um_produto" /> 
     </LinearLayout> 

     <LinearLayout 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:orientation="horizontal" > 

      <LinearLayout 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:orientation="vertical" > 

       <TextView 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="@string/quantidade" /> 

       <EditText 
        android:id="@+id/venda_form_qtd" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:inputType="numberDecimal" 
        android:selectAllOnFocus="true" 
        android:text="@string/um" /> 
      </LinearLayout> 

      <LinearLayout 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:orientation="vertical" > 

       <TextView 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="@string/valor" /> 

       <EditText 
        android:id="@+id/venda_form_valor" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:cursorVisible="false" 
        android:focusable="false" 
        android:inputType="none" /> 
      </LinearLayout> 
     </LinearLayout> 

     <LinearLayout 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:orientation="horizontal" > 

      <LinearLayout 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:orientation="vertical" > 

       <TextView 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="@string/desconto" /> 

       <EditText 
        android:id="@+id/venda_form_desc" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:inputType="numberDecimal" 
        android:selectAllOnFocus="true" 
        android:text="@string/zero" /> 
      </LinearLayout> 

      <LinearLayout 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:orientation="vertical" > 

       <TextView 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="@string/subtotal" /> 

       <EditText 
        android:id="@+id/venda_form_subtotal" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:cursorVisible="false" 
        android:focusable="false" 
        android:inputType="none" /> 
      </LinearLayout> 
     </LinearLayout> 

     <Button 
      android:id="@+id/venda_form_btn" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_gravity="center_horizontal" 
      android:padding="10dp" 
      android:text="@string/adicionar" /> 

     <LinearLayout 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" > 

      <ListView 
       android:id="@android:id/list" 
       android:layout_width="fill_parent" 
       android:layout_height="0dp" 
       android:layout_weight="1" 
       android:scrollbars="none" > 
      </ListView> 
     </LinearLayout> 
    </LinearLayout> 

</LinearLayout>

而且我的活动

public class VendaFormActivity extends Activity { 

    private Cliente cliente; 
// private Spinner condicaoSelect; 
    private Produto produto; 
    private TextWatcher somar; 
    private ItemVenda itemVenda; 
    private ListaAdapter listaAdapter; 
    private EditText inputQuantidade; 
    private EditText inputDesconto; 
    private EditText inputSubTotal; 
    private EditText inputProduto; 
    private EditText inputValor; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_venda_form); 

     inputProduto = ((EditText) findViewById(R.id.venda_form_prod)); 
     inputValor = ((EditText) findViewById(R.id.venda_form_valor)); 

     ((EditText) findViewById(R.id.venda_form_cliente)).setOnClickListener(new ClickListener(this, ClienteActivity.class, MainActivity.REQUEST_CLIENTE)); 
     inputProduto.setOnClickListener(new ClickListener(this, ProdutoActivity.class, MainActivity.REQUEST_PRODUTO)); 

     //condicaoSelect = (Spinner) findViewById(R.id.venda_form_condicao); 
     //new CondicaoHelper(this).popular(condicaoSelect); 

     bindCamposValores(); 
     fazerLista(); 
     bindBtnAdd(); 
    } 

    private void limparCamposValores() { 
     inputDesconto.setText("0.00"); 
     inputQuantidade.setText("1"); 
     inputSubTotal.getText().clear(); 
     inputProduto.getText().clear(); 
    } 

    private void bindBtnAdd() { 
     ((Button) findViewById(R.id.venda_form_btn)).setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       try{ 
        Double quantidade = Double.parseDouble(inputQuantidade.getText().toString()); 
        Double desconto = Double.parseDouble(inputDesconto.getText().toString()); 

        itemVenda = new ItemVenda(); 
        itemVenda.setDesconto(desconto); 
        itemVenda.setProduto(produto); 
        itemVenda.setQuantidade(quantidade); 

        listaAdapter.setNotifyOnChange(true); 
        listaAdapter.getItens().add(itemVenda); 
        listaAdapter.notifyDataSetChanged(); 

        Toast.makeText(getApplication(), "Foi", Toast.LENGTH_SHORT).show(); 

        limparCamposValores(); 
       } catch (Exception e) { 
        Toast.makeText(getApplication(), "Invalido", Toast.LENGTH_SHORT).show(); 
        // NPE no produto 
        // NumberFormat nos valores 
       } 
      } 
     }); 
    } 

    private void fazerLista() { 
     listaAdapter = new ListaAdapter(getApplicationContext()); 
     ((ListView) findViewById(android.R.id.list)).setAdapter(listaAdapter); 
    } 

    static class ViewHolder { 
     protected TextView descricao; 
     protected TextView codigo; 
     protected TextView ean; 
     protected TextView referencia; 
     protected TextView quantidade; 
     protected TextView valor_unit; 
     protected TextView valor_item; 
    } 

    private class ListaAdapter extends ArrayAdapter<ItemVenda>{ 
     private final Context context; 
     private final List<ItemVenda> itens; 

     public ListaAdapter(Context context) { 
      super(context, R.layout.produto_list); 
      this.context = context; 
      this.itens = new LinkedList<ItemVenda>(); 
     } 
     public ListaAdapter(Context context, List<ItemVenda> itens) { 
      super(context, R.layout.produto_list, itens); 
      this.context = context; 
      this.itens = itens; 
     } 

     public List<ItemVenda> getItens() { 
      return itens; 
     } 

     @Override 
     public View getView(int position, View convertView, ViewGroup parent) { 
      View view = null; 
      if (convertView == null) { 
       LayoutInflater inflator = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
       view = inflator.inflate(R.layout.produto_list_item, null); 

       final ViewHolder viewHolder = new ViewHolder(); 
       viewHolder.descricao = (TextView) view.findViewById(R.id.descricao); 
       viewHolder.codigo = (TextView) view.findViewById(R.id.codigo); 
       viewHolder.ean = (TextView) view.findViewById(R.id.ean); 
       viewHolder.referencia = (TextView) view.findViewById(R.id.referencia); 
       viewHolder.quantidade = (TextView) view.findViewById(R.id.quantidade); 
       viewHolder.valor_unit = (TextView) view.findViewById(R.id.valor_unit); 
       viewHolder.valor_item = (TextView) view.findViewById(R.id.valor_item); 

       view.setTag(viewHolder); 
      } else { 
        view = convertView; 
      } 

      ViewHolder holder = (ViewHolder) view.getTag(); 

      ItemVenda item = itens.get(position); 
      holder.descricao.setText(item.getProduto().getNome()); 
      holder.codigo.setText(item.getProduto().getCodigo()); 
      holder.ean.setText(item.getProduto().getEan()); 
      holder.referencia.setText(item.getProduto().getReferencia()); 
      holder.quantidade.setText(item.getQuantidade().toString()); 
      holder.valor_unit.setText(item.getProduto().getPreco().toString()); 
      holder.valor_item.setText(item.getSubTotal().toString()); 

      return view; 
     } 

    } 

    private void bindCamposValores() { 
     inputQuantidade = ((EditText) findViewById(R.id.venda_form_qtd)); 
     inputDesconto = ((EditText) findViewById(R.id.venda_form_desc)); 
     inputSubTotal = ((EditText) findViewById(R.id.venda_form_subtotal)); 

     somar = new TextWatcher() { 

      @Override 
      public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { } 

      @Override 
      public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { } 

      @Override 
      public void afterTextChanged(Editable arg0) { 
       Double sub = 0.0; 

       try{ 
        itemVenda = new ItemVenda(); 
        itemVenda.setQuantidade(Double.parseDouble(inputQuantidade.getText().toString())); 
        itemVenda.setDesconto(Double.parseDouble(inputDesconto.getText().toString())); 
        itemVenda.setProduto(produto); 

        sub = itemVenda.getSubTotal(); 
       } catch (Exception e) { 
        // algum campo não é numero/está vazio 
       } 

       inputSubTotal.setText(""+sub); 
      } 
     }; 

     // Se mudar o valor 
     inputQuantidade.addTextChangedListener(somar); 
     inputDesconto.addTextChangedListener(somar); 

     // quando sair do campo 
     inputQuantidade.setOnFocusChangeListener(new Focus("1")); 
     inputDesconto.setOnFocusChangeListener(new Focus("0.00")); 
    } 

    private class Focus implements OnFocusChangeListener { 

     private final String padrao; 

     public Focus(String padrao){ 
      this.padrao = padrao; 
     } 

     @Override 
     public void onFocusChange(View v, boolean hasFocus) { 
      if(!hasFocus){ 

       Editable text = ((EditText) v).getText(); 
       if(null == text || "".equals(text.toString())){ 
        text.append(padrao); 
       } 
      } 
     } 

    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     getMenuInflater().inflate(R.menu.activity_venda_form, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle item selection 
     switch (item.getItemId()) { 
      case R.id.menu_copiar: 
       copiar(); 
       return true; 

      case R.id.menu_simulacao: 
       simulacao(); 
       return true; 
      default: 
       return super.onOptionsItemSelected(item); 
     } 
    } 

    private void copiar() { 
     Toast.makeText(getApplication(), "Nada ainda", Toast.LENGTH_SHORT).show(); 

    } 

    private void simulacao() { 
     Intent intent = new Intent(getApplicationContext(), SimulacaoPagtoActivity.class); 
     startActivityForResult(intent, MainActivity.REQUEST_SIMULACAO); 
    } 

    @Override 
    public void onActivityResult(int requestCode, int resultCode, Intent intent) { 
     if (requestCode == MainActivity.REQUEST_CLIENTE) { 

      if (resultCode == RESULT_OK) { 
       cliente = (Cliente) intent.getSerializableExtra(MainActivity.RESULT_MODEL_LIST); 
       ((EditText) findViewById(R.id.venda_form_cliente)).setText(cliente.getNome()); 
      } 

     } else if (requestCode == MainActivity.REQUEST_PRODUTO) { 

      if (resultCode == RESULT_OK) { 
       produto = (Produto) intent.getSerializableExtra(MainActivity.RESULT_MODEL_LIST); 
       inputProduto.setText(produto.getNome()); 
       inputValor.setText(""+produto.getPreco()); 
       somar.afterTextChanged(null); 
      } 

     } else if(requestCode == MainActivity.REQUEST_SIMULACAO){ 
      // o que fazer quando voltar da simulação ? 
     } 
    } 

}

最后，我项目布局

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:baselineAligned="false" 
    android:orientation="vertical" 
    android:padding="5dp" > 

    <TextView 
     android:id="@+id/descricao" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:textColor="#333" 
     android:textSize="16sp" 
     android:textStyle="bold" /> 

    <LinearLayout 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:orientation="horizontal" > 

     <TextView 
      android:id="@+id/codigo" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:layout_weight="1" 
      android:text="CODIGO" /> 

     <TextView 
      android:id="@+id/ean" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:layout_weight="1" 
      android:text="EAN" /> 

     <TextView 
      android:id="@+id/referencia" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:layout_weight="1" 
      android:text="REFERENCIA" /> 

    </LinearLayout> 
    <LinearLayout 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:orientation="horizontal" > 

     <TextView 
      android:id="@+id/quantidade" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:layout_weight="1" 
      android:text="QUANT." /> 

     <TextView 
      android:id="@+id/valor_unit" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:layout_weight="1" 
      android:text="VLR UNIT" /> 

     <TextView 
      android:id="@+id/valor_item" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:layout_weight="1" 
      android:text="VLR ITEM" /> 

    </LinearLayout> 

</LinearLayout>

UPDATE

当我在列表中添加一个项目时，什么都不显示。但是，当我点击一个TextEdit和虚拟键盘后，输入一些值后，我关闭键盘，然后调用adapter.getView（），并出现列表

来源

2013-05-21 Falci

实测溶液

1）适配器具有2个构造函数，但只是1 ，并且它不被调用。我修好了。

2）要在列表中添加项目，我需要调用adapter.add()而不是adapter.getItens（）。add（）`。我觉得这触发了别人的方法。

3）最后，要采取滚动列表，并在屏幕上应用滚动，我需要增加列表的大小。然后我重写方法适配器。加（），并计算出名单的新高度，并添加android:scrollbars="none"上ListView

感谢所有人，特别是滚动型事业`UnsupportedOperationException`内@Marek

来源

2013-05-21 03:24:39 Falci

我不确定，但如果你希望列表可以与活动一起滚动，您应该使用ScrollView，然后检查您是否滚动列表或视图本身。试一试

如果该项目实际添加到列表中，您还可以尝试查看调试器。我希望你会发现一个错误。

来源

2013-05-21 01:57:27 Marek

的ListView。另一件事，adapter.getView（）从来没有被称为 – Falci

也许你将能够帮助我在http://stackoverflow.com/questions/16661647/drawingpanel-canvas-not-drawing-in-a-android-fragment-from - 教程非常感谢！ – Marek

我想我找到了你的问题。应该不是下面的代码：

((ListView) findViewById(android.R.id.list)).setAdapter(listaAdapter);

要：

((ListView) findViewById(R.id.list)).setAdapter(listaAdapter);

呢？

您正在尝试查找默认的Android视图，而不是您创建的视图，这意味着您实际上没有为您的ListView设置适配器。

来源

2013-05-21 03:05:55 JosephGarrone

我承认，我没有太多的Android经验，但我很惊讶地发现这部分是正确的 – Falci

@Falci所以......这是否解决了这个问题？ – JosephGarrone

现在，是的！谢谢 – Falci

不显示自定义列表视图

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