我有一个从服务器获取数据的异步任务填充的列表视图。但是,当列表视图第一次出现时,滚动条会出现,然后立即消失。我的主要活动扩展了 MapActivity,因为我在列表视图上方显示了一张地图。有谁知道为什么滚动条消失以及如何纠正它?下面是我的主要布局。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
>
<TextView
android:text="Address is: "
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/address_view" />
<com.google.android.maps.MapView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mapvw"
android:layout_width="match_parent"
android:layout_height="250dp"
android:enabled="true"
android:clickable="true"
android:apiKey="xxxxxxxxxxxxxxxxxx"
/>
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="200dp"
android:scrollbars="vertical"
android:drawSelectorOnTop="false" />
</LinearLayout>
这是我的列表视图的自定义布局。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TextView
android:id="@+id/viewtext"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:minHeight="?android:attr/listPreferredItemHeight"
android:paddingLeft="6sp"
android:textColor="#000000"
android:textSize="15sp"
android:paddingRight="10sp"
/>
</LinearLayout>
下面是创建列表视图的逻辑:
@Override
protected void onPostExecute(ArrayList<String> result) {
......... some code
List<String> viewline = new ArrayList<String>();
..... some code
mapView.postInvalidate();
final ArrayAdapter<String> arrayAdpt = new ArrayAdapter<String>(getApplicationContext(), R.layout.listview, R.id.viewtext, viewline);
ListView restaurant_list = (ListView) findViewById(R.id.list);
restaurant_list.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
restaurant_list.setAdapter(arrayAdpt);
restaurant_list.setScrollContainer(true);
restaurant_list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "You have selected " + String.valueOf(arg2) + " arg3=" + String.valueOf(arg3) , Toast.LENGTH_LONG).show();
}
});
}