android - ListView 中的多个数组

Question

对于我的 ListView ，我希望能够在其中显示多个 TextView ，每个 TextView 显示与其关联的特定数组的项目。现在是我所拥有的:

public class GreatestHits extends ListActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, Array1));

    ListView lv = getListView();
    lv.setTextFilterEnabled(true);

    lv.setOnItemClickListener(new OnItemClickListener() {
      public void onItemClick(AdapterView<?> parent, View view,
          int position, long id) {
          String text = (String) ((TextView)view).getText();
}

    });

}
 static final String[] Array1 = new String[] {"Item1", "Item2"};
 static final String[] Array2 = new String[] {"Item1", "Item2"};
static final String[] Array3 = new String[] {"Item1", "Item2"};  

和 R.layout.list_item 的 xml:

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp"
android:textSize="16sp"
android:id= "@+id/textView1" 
>

</TextView>

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp"
android:textSize="16sp" 
android:id= "@+id/textView2" 
>
</TextView>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp"
android:textSize="16sp" 
android:id= "@+id/textView3" 
>
</TextView>

如何将数组 2 和数组 3 放入代码中，以便它可以显示在 listview lv 的 TextView 中？

Answer 1

ArrayAdapter 只能在一个 TextView 中显示来自一个数组的数据。您必须通过自己扩展 BaseAdapter 来自己提供此功能。我目前无法编译 android 代码，因此以下代码未经测试...但它至少应该让您了解您可以做什么。

public class TripleArrayAdapter extends BaseAdapter {
  private String[] array1, array2, array3;
  private LayoutInflater inflater;

  public TripleArrayAdapter(Context context, String[] a1, String[] a2, String[]a3) {
    array1 = a1;
    array2 = a2;
    array3 = a3;
    inflater = 
        (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  }

  @Override
  public int getCount() {
    return array1.length;
  }

  @Override
  public Object getItem(int position) {
    return null;
  }

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

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

    if(currentView==null) {
      currentView = inflater.inflate(R.layout.list_item, parent, false);
    }

    TextView tView = (TextView)currentView.findViewById(R.id.textView1);
    tView.setText(array1[position]);

    tView = (TextView)currentView.findViewById(R.id.textView2);
    tView.setText(array2[position]);

    tView = (TextView)currentView.findViewById(R.id.textView3);
    tView.setText(array3[position]);

    return currentView;
  }
}

然后，要将此适配器用作您的 ListActivity 的适配器，您只需说

setListAdapter(new TripleArrayAdapter(this, Array1, Array2, Array3));