更改Listview dynamicAndroid的高度

Question

我的XML文件格式如下:

 LinearLayout 

     ScrollView

         RelativeLayout

             LinearLayout

             <ListView
               android:id="@android:id/list"
               android:layout_width="match_parent"
               android:layout_height="fill_parent"
               android:layout_margin="5dip"
               android:layout_weight="30" >
             </ListView>

             LinearLayout

这是我的BaseAdapter类

public class APIQuickCheckoutProductProvider extends BaseAdapter {

private Activity activity;
private ArrayList<HashMap<String, String>> data;
private static LayoutInflater inflater = null;

public APIQuickCheckoutProductProvider(Activity a, ArrayList<HashMap<String, String>> d) {
    activity = a;
    data = d;
    inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}

public int getCount() {
    return data.size();
}

public Object getItem(int position) {
    return position;
}

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

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View vi = convertView;
    if (convertView == null)
        vi = inflater.inflate(R.layout.product_item, null);

    TextView brand = (TextView) vi.findViewById(R.id.brands); 
    TextView quantity_name = (TextView) vi.findViewById(R.id.quantity_name); 

    TextView price = (TextView) vi.findViewById(R.id.price); 

    HashMap<String, String> product = new HashMap<String, String>();
    product = data.get(position);

    // Setting all values in listview
    brand.setText(product.get(APIQuickCheckout.KEY_BRAND));
    quantity_name.setText(product.get(APIQuickCheckout.KEY_QUANTITY_NAME));
    price.setText(product.get(APIQuickCheckout.KEY_PRICE));

    return vi;
}
}

这是我设置适配器的主要类:

adapter = new APIQuickCheckoutProductProvider(APIQuickCheckout.this, productList);
lv.setAdapter(adapter);
adapter.notifyDataSetChanged();

最后,这是我设置到列表视图的每一行

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

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="0dip"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="5dip"
    android:layout_weight="7"
    android:weightSum="6" >

    <TextView
        android:id="@+id/brands"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:layout_weight="3" />

    <TextView
        android:id="@+id/quantity_name"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:layout_weight="3" />
  </LinearLayout>

  <LinearLayout
    android:layout_width="0dip"
    android:layout_height="wrap_content"
    android:layout_weight="1" />

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="0dip"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="5dip"
    android:layout_weight="2"
    android:weightSum="6" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="0dip"
        android:layout_weight="3" />

    <TextView
        android:id="@+id/price"
        android:layout_width="wrap_content"
        android:layout_height="0dip"
        android:layout_weight="3" />
   </LinearLayout>

 </LinearLayout>

但是,当我尝试上面提到的代码时,它会显示第一个产品,而我只能看到第二个产品的顶部.从那时起我就什么都看不见了.那么,ListView当我添加新产品时,如何动态更改高度呢？为了显示所有这些.

Answer 1

如果要动态更改列表视图的高度,可以使用,

list.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, theSizeIWant));