我在 scrollView 中有 listView(是的,我知道那是不好的方法。最好使用页眉/页脚)。我知道 scrollView 和 listView 都有滚动,这会导致一些冲突。在这种情况下,我需要手动设置列表的高度。这就是问题所在,因为 listView 具有自定义适配器。
布局:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ScrollView01"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
android:scrollbars="none" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/fragment_lessons"
android:background="#FAF9F9"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.cbsystematic.mobile.itvdn.LessonsFragment">
<TextView
android:id="@+id/course_title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Описание курса: "
android:textSize="16sp"
android:textStyle="bold"
android:textColor="#000000"/>
<TextView
android:id="@+id/course_description"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="16sp"
android:layout_below="@id/course_title"
android:textColor="#000000"/>
<TextView
android:id="@+id/course_duration"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="14sp"
android:textStyle="italic"
android:layout_below="@id/course_description"
android:textColor="#000000"/>
<ListView android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@id/course_duration"/>
</RelativeLayout>
</LinearLayout>
</ScrollView>
自定义列表适配器:
class LessonsItemAdapter extends ArrayAdapter<LessonData> {
private Activity myContext;
private ArrayList<LessonData> datas;
public LessonsItemAdapter(Context context, int textViewResourceId, ArrayList<LessonData> objects){
super(context, textViewResourceId, objects);
myContext = (Activity) context;
datas = objects;
}
public View getView(int position, View convertView, ViewGroup parent){
ViewHolder viewHolder;
if(convertView == null) {
LayoutInflater inflater = myContext.getLayoutInflater();
convertView = inflater.inflate(R.layout.lessons_list_item, null);
viewHolder = new ViewHolder();
viewHolder.postNameView = (TextView) convertView.findViewById(R.id.lessons_name);
viewHolder.postDurationView = (TextView) convertView.findViewById(R.id.lessons_duration);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
//(position + 1) + ") " used to display 1) 2) 3) etc of lessons
viewHolder.postNameView.setText((position + 1) + ") " + datas.get(position).getName());
viewHolder.postDurationView.setText("Длительность: " + datas.get(position).getDuration().substring(0,8));
return convertView;
}
static class ViewHolder{
TextView postNameView;
TextView postDurationView;
}
}
求高的方法:
public static void setListViewSize(AbsListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null)
return;
int desiredWidth = MeasureSpec.makeMeasureSpec(listView.getWidth(), MeasureSpec.UNSPECIFIED);
int totalHeight = 0;
View view = null;
for (int i = 0; i < listAdapter.getCount(); i++) {
view = listAdapter.getView(i, view, listView);
if (i == 0)
view.setLayoutParams(new ViewGroup.LayoutParams(desiredWidth, AbsListView.LayoutParams.WRAP_CONTENT));
view.measure(desiredWidth, MeasureSpec.UNSPECIFIED);
totalHeight += view.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getMeasuredHeight() * (listAdapter.getCount() + 1));
listView.setLayoutParams(params);
listView.requestLayout();
}
这就是我设置列表内容的方式:
mAdapter = new LessonsItemAdapter(getActivity(),
R.layout.lessons_list_item, parserJson.getLessons(courseUrl).getLessonsArray());
// Set the adapter
mListView = (AbsListView) view.findViewById(android.R.id.list);
((AdapterView<ListAdapter>) mListView).setAdapter(mAdapter);
// Set OnItemClickListener so we can be notified on item clicks
mListView.setOnItemClickListener(this);
ListHelper.setListViewSize(mListView);
这就是结果:
整个View都在滚动。但是最后一项总是只显示一半。你看,持续时间字段(“Длительность”)没有显示。尽管列表的最后一项是可点击的。
请帮助我定义总高度的方法。 提前致谢。感谢任何帮助。
最佳答案
使用这段代码。它会根据项目的数量重置 ListView 的大小。
public static void setListViewHeightBasedOnChildren(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null)
return;
int desiredWidth = MeasureSpec.makeMeasureSpec(listView.getWidth(),
MeasureSpec.UNSPECIFIED);
int totalHeight = 0;
View view = null;
for (int i = 0; i < listAdapter.getCount(); i++) {
view = listAdapter.getView(i, view, listView);
if (i == 0)
view.setLayoutParams(new ViewGroup.LayoutParams(desiredWidth,
LayoutParams.WRAP_CONTENT));
view.measure(desiredWidth, MeasureSpec.UNSPECIFIED);
totalHeight += view.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight
+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
listView.requestLayout();
}
关于android - 使用自定义适配器获取 ListView 的高度,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28189975/