我有一些关于可展开列表视图的内容。我无法滚动整个布局。我已经搜索了一个多星期，寻找合适的答案。请给出一些建议。
可展开的列表视图嵌套在滚动视图中
12
- Satty
4
如果你想滚动你的布局，那么你可以在你的布局中使用滚动条。 - Himani
https://dev59.com/r4rda4cB1Zd3GeqPKUgV#46660821 - Ankur Bavishi
我已经解决了相同的问题 > https://dev59.com/r4rda4cB1Zd3GeqPKUgV#46660821 - Ankur Bavishi
1我用以下方法解决了这个问题：链接 - Ankur Bavishi
9个回答
19
这个解决方案对我有用。当我在导航视图中使用带有LinearLayout的滚动视图的自定义布局时，它能够支持可扩展列表视图。
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="@layout/nav_header">
<ScrollView
android:fillViewport="true"
android:layout_marginTop="130dp"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:id="@+id/homeLayout"
android:clickable="true"
android:gravity="center_vertical"
android:background="@drawable/layout_click_effect"
android:layout_width="match_parent"
android:layout_height="45dp">
<ImageView
android:id="@+id/homeIv"
android:layout_width="45dp"
android:layout_height="wrap_content"
android:src="@mipmap/ic_home_black_24dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Home" />
</LinearLayout>
<View
android:background="@android:color/darker_gray"
android:layout_width="match_parent"
android:layout_height="1dp"/>
<ExpandableListView
android:id="@+id/topCatgExpLv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="start"
android:groupIndicator="@null"
android:dividerHeight="1dp" />
</ScrollView>
</android.support.design.widget.NavigationView>
在你的onCreate方法中
mListView = (ExpandableListView) findViewById(R.id.activity_expandable_list_view);
MyExpandableListAdapter adapter = new MyExpandableListAdapter(this,
mGroups);
mListView.setAdapter(adapter);
mListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
setListViewHeight(parent, groupPosition);
return false;
}
});
private void setListViewHeight(ExpandableListView listView, int group) {
ExpandableListAdapter listAdapter = (ExpandableListAdapter) listView.getExpandableListAdapter();
int totalHeight = 0;
int desiredWidth = View.MeasureSpec.makeMeasureSpec(listView.getWidth(),
View.MeasureSpec.EXACTLY);
for (int i = 0; i < listAdapter.getGroupCount(); i++) {
View groupItem = listAdapter.getGroupView(i, false, null, listView);
groupItem.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);
totalHeight += groupItem.getMeasuredHeight();
if (((listView.isGroupExpanded(i)) && (i != group))
|| ((!listView.isGroupExpanded(i)) && (i == group))) {
for (int j = 0; j < listAdapter.getChildrenCount(i); j++) {
View listItem = listAdapter.getChildView(i, j, false, null,
listView);
listItem.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);
totalHeight += listItem.getMeasuredHeight();
}
//Add Divider Height
totalHeight += listView.getDividerHeight() * (listAdapter.getChildrenCount(i) - 1);
}
}
//Add Divider Height
totalHeight += listView.getDividerHeight() * (listAdapter.getGroupCount() - 1);
ViewGroup.LayoutParams params = listView.getLayoutParams();
int height = totalHeight
+ (listView.getDividerHeight() * (listAdapter.getGroupCount() - 1));
if (height < 10)
height = 200;
params.height = height;
listView.setLayoutParams(params);
listView.requestLayout();
}
- Amit Tumkur
5
1对我有用。谢谢。 - Usman Rana
但是它只在我点击可展开列表视图的组项时才起作用。当我滚动视图时，它不起作用。 - S HemaNandhini
@SNandhini 上面的代码 'setListViewHeight' 添加了子项的高度，并且只有在单击组时才显示它，如果您想要展开组并显示其子项，则应手动设置组展开状态，并相应地调用上述 'setListViewHeight' 方法，例如在 for 循环中传递 Exp Listview 和组位置。 - Amit Tumkur
@AmitTumkur，对于多级可展开列表视图（例如3级或4级），它无法正常工作。有什么帮助吗？ - KJEjava48
@KJEjava48，您的顶层/第一级可展开视图高度应根据子可展开列表视图的展开/关闭状态进行计算。 - Amit Tumkur
8
你可以很简单地实现这一点。将滚动视图的高度设置为wrap_content。将滚动视图内根视图（比如线性布局）的高度设置为wrap_content，将可展开列表视图的高度也设置为wrap_content。之后，为您的可展开列表视图设置OnGroupExpandListener和OnGroupCollapseListener，并将其高度设置为可展开列表视图的子项高度。代码如下：
你的布局：
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/scrollViewDrawer"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:fillViewport="true"
>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:background="@color/mainGray"
>
<ExpandableListView
android:id="@+id/expandableListCategory"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
</ScrollView>
这是你的片段代码：（或者在你的活动中）
public class DrawerFragment extends Fragment implements, OnGroupExpandListener, OnGroupCollapseListener{
ScrollView scrollView;
ExpandableListView expListView;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
view rootView = inflater.inflate(R.layout.fragment_layout, container, false);
scrollView = (ScrollView) rootView.findViewById(R.id.scrollViewDrawer);
expListView = (ExpandableListView) rootView.findViewById(R.id.expandableListCategory);
....
}
@Override
public void onGroupExpand(int groupPosition) {
LinearLayout.LayoutParams param = (LinearLayout.LayoutParams) expListView.getLayoutParams();
param.height = (childCount * expListView.getHeight());
expListView.setLayoutParams(param);
expListView.refreshDrawableState();
scrollView.refreshDrawableState();
}
@Override
public void onGroupCollapse(int groupPosition) {
LinearLayout.LayoutParams param = (LinearLayout.LayoutParams) expListView.getLayoutParams();
param.height = LinearLayout.LayoutParams.WRAP_CONTENT;
expListView.setLayoutParams(param);
expListView.refreshDrawableState();
scrollView.refreshDrawableState();
}
- Saber Solooki
3
1在onGroupExpand计算param.height时，我必须将子项数量加1，以考虑到展开后高度为标题和子项高度之和的情况。（这假设标题布局高度和子项标题高度大小相同。） - k2col
嗨，这段代码在可扩展列表视图底部添加了额外的空间。 - pooja majoka
不起作用，我已经尝试了很多方法，比如在另一个XML中包含<layout>，但它没有起作用。 - Sulman Rasheed
3
我知道这个问题已经很老了，但也许对某些人有帮助。基本上我的答案是 Amit Tumkur 和 user2141833 的答案的结合体。经过了很多的尝试和错误，以下代码对我是起作用的:
首先计算可扩展列表视图的初始高度，即在整个列表折叠时的高度。
同时布局中包含一个ExpandableListView，位于一个LinearLayout和一个ScrollView内部。
希望这能帮助到某些人。 :)
首先计算可扩展列表视图的初始高度，即在整个列表折叠时的高度。
for (Integer i = 0; i < mAdapter.getGroupCount(); i++) {
View groupItem = mAdapter.getGroupView(i, false, null, mExpandableListView);
groupItem.measure(mExpandableListView.getWidth(), View.MeasureSpec.UNSPECIFIED);
mInitialHeight += groupItem.getMeasuredHeight();
}
当点击该组时，将可扩展列表视图的高度设置为“Wrap Content”
mExpandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
//Other Expansion/Collapsing Logic
setListHeightToWrap();
return true;
}
});
setListHeightToWrap是一种不同的方法：
private void setListHeightToWrap() {
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) mExpandableListView.getLayoutParams();
params.height = ViewGroup.LayoutParams.WRAP_CONTENT;
mExpandableListView.setLayoutParams(params);
mExpandableListView.refreshDrawableState();
mScrollView.refreshDrawableState();
}
然后在OnGroupExpandListener中将可扩展列表视图的高度设置为：
mExpandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) mStitchingWorksListView.getLayoutParams();
//The Logic here will change as per your requirements and the height of each of the children in the group
if (mAdapter.getRealChildrenCount(groupPosition) > 6) {
params.height = 9 * mInitialHeight;
} else {
params.height = 6 * mInitialHeight;
}
//For Last Group in the list and the number of children were less as compared to other groups
if (groupPosition == mAdapter.getGroupCount() - 1) {
params.height = 3 * mInitialHeight;
}
mExpandableListView.setLayoutParams(params);
mExpandableListView.refreshDrawableState();
}
});
同时布局中包含一个ExpandableListView，位于一个LinearLayout和一个ScrollView内部。
希望这能帮助到某些人。 :)
- Varun Ramani
2
对于想要在scrollview中使用可扩展列表视图的用户，请使用视图代替可扩展列表，按照以下链接和代码操作：
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:id="@+id/linear_listview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" />
</ScrollView>
在Java类中，有如下的代码 -
for (int i = 0; i < pProductArrayList.size(); i++) {
LayoutInflater inflater = null;
inflater = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View mLinearView = inflater.inflate(R.layout.row_first, null);
final TextView mProductName = (TextView) mLinearView.findViewById(R.id.textViewName);
final RelativeLayout mLinearFirstArrow=(RelativeLayout)mLinearView.findViewById(R.id.linearFirst);
final ImageView mImageArrowFirst=(ImageView)mLinearView.findViewById(R.id.imageFirstArrow);
final LinearLayout mLinearScrollSecond=(LinearLayout)mLinearView.findViewById(R.id.linear_scroll);
if(isFirstViewClick==false){
mLinearScrollSecond.setVisibility(View.GONE);
mImageArrowFirst.setBackgroundResource(R.drawable.arw_lt);
}
else{
mLinearScrollSecond.setVisibility(View.VISIBLE);
mImageArrowFirst.setBackgroundResource(R.drawable.arw_down);
}
mLinearFirstArrow.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if(isFirstViewClick==false){
isFirstViewClick=true;
mImageArrowFirst.setBackgroundResource(R.drawable.arw_down);
mLinearScrollSecond.setVisibility(View.VISIBLE);
}else{
isFirstViewClick=false;
mImageArrowFirst.setBackgroundResource(R.drawable.arw_lt);
mLinearScrollSecond.setVisibility(View.GONE);
}
return false;
}
});
- Manish Srivastava
1
这种方法仅适用于少于100个项目的情况，因为如果超过100个项目，应用程序将会在所有项目的填充完成之前冻结。 - MSA
0
在下面输入adapteSet代码
enter code hereListAdapter listAdapter = listView.getAdapter();
int totalHeight = 0;
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight
+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
listView.requestLayout();
- vaisakh mv
0
从API Level 21（棒棒糖）开始，Android SDK正式支持嵌套滚动容器。View和ViewGroup类中有许多方法提供此功能。要使Lollipop上的嵌套滚动工作，您必须通过将android：nestedScrollingEnabled =“true”添加到其XML声明或显式调用setNestedScrollingEnabled（true）来启用子滚动视图的嵌套滚动。
- meekash55
0
请尝试一次。
1）在设置适配器后，请添加此行setExpandableListViewHeight（expandableListViewCategories）。
expandableListCategoriesAdapter = new ExpandableListCategoriesAdapter(getActivity(), listDataHeader, listDataChild);
expandableListViewCategories.setAdapter(expandableListCategoriesAdapter);
expandableListCategoriesAdapter.notifyDataSetChanged();
setExpandableListViewHeight(expandableListView);
2) 复制下面的内容并粘贴到setExpandableListViewHeight()方法中。
private void setExpandableListViewHeight(ExpandableListView listView) {
try {
ExpandableListAdapter listAdapter = (ExpandableListAdapter) listView.getExpandableListAdapter();
int totalHeight = 0;
for (int i = 0; i < listAdapter.getGroupCount(); i++) {
View listItem = listAdapter.getGroupView(i, false, null, listView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
int height = totalHeight + (listView.getDividerHeight() * (listAdapter.getGroupCount() - 1));
if (height < 10) height = 200;
params.height = height;
listView.setLayoutParams(params);
listView.requestLayout();
scrollBody.post(new Runnable() {
public void run() {
scrollBody.fullScroll(ScrollView.FOCUS_UP);
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
注意：这将自动收起您的可扩展列表视图，您可以滚动查看完整视图。
- Surendar D
1
scrollBody是什么，它没有被识别。 - Amir Dora.
0
尝试了太多解决方案后，我将两个解决方案结合起来，现在它正常工作menuHeight很重要。
expandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
LinearLayout.LayoutParams param = (LinearLayout.LayoutParams)
expandableListView.getLayoutParams();
param.height = (2 * menuHeight); //adjust 2 according to you
expandableListView.setLayoutParams(param);
expandableListView.refreshDrawableState();
findViewById(R.id.sv_menu).refreshDrawableState();
}
});
static int menuHeight =0; // declare globally
public static void setListViewHeightBasedOnChildren(ExpandableListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) return;
int desiredWidth = View.MeasureSpec.makeMeasureSpec(listView.getWidth(),
View.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, ViewGroup.LayoutParams.WRAP_CONTENT));
view.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);
totalHeight += view.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
listView.requestLayout();
menuHeight = totalHeight;}
- Swapnil Thube
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