java - 用 3 个列表填充 GridView

Question

我有 3 个列表，我希望它们在单击按钮时填充 GridView 。

在 Layout.xml 中，griView 的 numColumns 为 3

private List<Strings> list1;
private List<Strings> list2;
private List<Strings> list3;

public void buttonOnClick(View v)
{
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
           android.R.layout.simple_list_item_1, list1);

    gridView.setAdapter(adapter);
}

我希望 GridView 像这样打印

list1(0)   list2(0)    list3(0)
list1(1)   list2(1)    list3(1)
list1(2)   list2(2)    list3(2)
list1(3)   list2(3)    list3(3)

Answer 1

假设您的三个列表大小相同:

List<String> gridList = new ArrayList<String>();
for(int i=0; i<list1.length; i++) {
    gridList.add(list1.get(i));
    gridList.add(list2.get(i));
    gridList.add(list3.get(i));
}

// Creates adapter with mixed list.
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, gridList);
gridView.setAdapter(adapter);

然后将 gridView numColumns 设置为 3:

<GridView android:id="@+id/gvItems" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"
    android:numColumns="3"
    android:gravity="center"
    android:stretchMode="columnWidth" />