Question

MainActivity：

public class MainActivity extends Activity {

ListView lista;
Context c;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    c=getApplicationContext();
    ArrayList<Seleccion> seleccion=new ArrayList<Seleccion>();
    seleccion.add(new Seleccion("David", "Fernández", R.drawable.ic_launcher));
    seleccion.add(new Seleccion("Fernando", "Pérez", R.drawable.ic_launcher));
    seleccion.add(new Seleccion("Antonio", "López", R.drawable.ic_launcher));
    seleccion.add(new Seleccion("María", "Domínguez", R.drawable.ic_launcher));
    ListaAdapter listAdapter=new ListaAdapter(c, seleccion);
    lista=(ListView)findViewById(R.id.listView1);
    lista.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                long id) {


        }
    });
    lista.setAdapter(listAdapter);

}
}

自定义适配器：

公共类ListaAdapter扩展了BaseAdapter {

private static int contador=0;
ArrayList<Seleccion>seleccion;
private LayoutInflater inflater = null;

static class ViewHolder{
    TextView nombre;
    TextView apellido;
    int imagen;
}

public ListaAdapter(Context c, ArrayList<Seleccion> seleccion) {
    Log.i("LISTA", "creating adapter");
    this.seleccion=seleccion;
    inflater = LayoutInflater.from(c);
    // TODO Auto-generated constructor stub
}

@Override
public int getCount() {
    // TODO Auto-generated method stub
    Log.i("LIST", "Returned "+seleccion.size()+" results");
    return seleccion.size();
}

@Override
public Object getItem(int position) {
    Log.i("LIST", "one item returned, name: "+seleccion.get(position).getNombre());
    return seleccion.get(position);
}

@Override
public long getItemId(int position) {
    // TODO Auto-generated method stub
    return position;
}

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

    ViewHolder holder;

    if(convertView==null){

        convertView=inflater.inflate(R.layout.listitemlayout, null);
        contador++;
        Log.i("LIST", contador+" vews created");
        holder=new ViewHolder();
        holder.nombre=(TextView)convertView.findViewById(R.id.textView1);
        holder.apellido=(TextView) convertView.findViewById(R.id.textView2);
        holder.imagen=R.id.imageView1;
        convertView.setTag(holder);
    }else{
        holder = (ViewHolder) convertView.getTag();
        Seleccion sel=(Seleccion)getItem(position);
        Log.i("LIST", "Name "+sel.getNombre());
        holder.nombre.setText(sel.getNombre());
        holder.apellido.setText(sel.getApellidos());
        holder.imagen=sel.getImagen();
    }

    return convertView;
}

}

自定义适配器的布局：

<?xml version="1.0" encoding="utf-8"?>

<ImageView
    android:id="@+id/imageView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:src="@drawable/ic_launcher" />

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="false"
    android:layout_alignTop="@drawable/ic_launcher"
    android:layout_toRightOf="@+id/imageView1"
    android:text="TextView"
    android:textSize="20dp" />

<TextView
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/textView1"
    android:layout_below="@+id/textView1"
    android:text="Small Text"
    android:textAppearance="?android:attr/textAppearanceSmall" />

</RelativeLayout>

MainActivity布局......

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<ListView
    android:id="@+id/listView1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >
</ListView>

</LinearLayout>

我在表中有四行，但只有第一行接收值。其他的仍保留适配器布局中的默认文本集。我不知道错误在哪里...任何帮助？谢谢。

Answer 1

将您的getView更改为：

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

    ViewHolder holder;

    if(convertView==null){

        convertView=inflater.inflate(R.layout.listitemlayout, null);
        contador++;
        Log.i("LIST", contador+" vews created");
        holder=new ViewHolder();
        holder.nombre=(TextView)convertView.findViewById(R.id.textView1);
        holder.apellido=(TextView) convertView.findViewById(R.id.textView2);
        holder.imagen=R.id.imageView1;
        convertView.setTag(holder);
    }else{
        holder = (ViewHolder) convertView.getTag();  
    }

        Seleccion sel=(Seleccion)getItem(position);
        Log.i("LIST", "Name "+sel.getNombre());
        holder.nombre.setText(sel.getNombre());
        holder.apellido.setText(sel.getApellidos());
        holder.imagen=sel.getImagen();

    return convertView;
}

Answer 2

症状相同但对我不同。我将片段布局更改为受控高度而不是match_parent，这解决了我的问题。

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

到

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:orientation="horizontal" >

ListView，四个值，只有第一个值得到满足

2 个答案: