我有一个ExpandableListView内部NestedScrollView（是的，我知道，在另一个滚动视图中拥有一个滚动视图并不好，但我不知道还能做什么，如果有人知道更好的方法，请告诉我）。
里面的内容大小NestedScrollView还在屏幕内所以不会滚动，但是ExpandableListView展开时内容会漏到屏幕外但NestedScrollView还是不会滚动..为什么会这样？
这是我的NestedScrollView布局：
<NestedScrollView>
<LinearLayout>
<LinearLayout></LinearLayout>
... // About 3 of the LinearLayouts
<ExpandableListView/>
</LinearLayout>
</NestedScrollView>
您可以使用您可以实现任何或或通过覆盖以下方法NonScrollExpandableListView的非滚动属性。LisviewGridViewExpandableListView
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int heightMeasureSpec_custom = MeasureSpec.makeMeasureSpec(
Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec_custom);
ViewGroup.LayoutParams params = getLayoutParams();
params.height = getMeasuredHeight();
}
因此，为了使用NonScrollExpandableListView，您需要创建一个自定义类。
public class NonScrollExpandableListView extends ExpandableListView {
public NonScrollExpandableListView(Context context) {
super(context);
}
public NonScrollExpandableListView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public NonScrollExpandableListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int heightMeasureSpec_custom = MeasureSpec.makeMeasureSpec(
Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec_custom);
ViewGroup.LayoutParams params = getLayoutParams();
params.height = getMeasuredHeight();
}
}
并像使用它一样。
<com.example.extraclasses.NonScrollExpandableListView
android:layout_width="match_parent"
android:layout_height="wrap_content" />
快乐编码。
添加android:nestedScrollingEnabled="true"到您的 ExpandalbleListView 布局。
V-rund Puro-hit的答案对我有用。但是需要一些修改才能使用支持 API >19 的 Kotlin。因此，为了节省时间，这里是：
创建一个新的类文件NonScrollExpandableListView：
import android.content.Context
import android.util.AttributeSet
import android.widget.ExpandableListAdapter
import android.widget.ExpandableListView
class NonScrollExpandableListView : ExpandableListView {
constructor(context: Context) : super(context) {}
constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {}
constructor(context: Context, attrs: AttributeSet, defStyle: Int) : super(context, attrs, defStyle) {}
override fun setAdapter(adapter: ExpandableListAdapter?) {
super.setAdapter(adapter)
}
override fun setOnChildClickListener(onChildClickListener: OnChildClickListener) {
super.setOnChildClickListener(onChildClickListener)
}
override fun expandGroup(groupPos: Int) : Boolean {
return super.expandGroup(groupPos)
}
override fun expandGroup(groupPos: Int, animate: Boolean) : Boolean {
return super.expandGroup(groupPos, animate)
}
override fun isGroupExpanded(groupPosition: Int): Boolean {
return super.isGroupExpanded(groupPosition)
}
public override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
val heightMeasureSpec_custom = MeasureSpec.makeMeasureSpec(
Integer.MAX_VALUE shr 2, MeasureSpec.AT_MOST)
super.onMeasure(widthMeasureSpec, heightMeasureSpec_custom)
val params = layoutParams
params.height = measuredHeight
}
}
...我像这样使用它：
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<com.example.you.kotlinlistview.NonScrollExpandableListView
android:id="@+id/expandableCategories"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/add_new_feed"
android:drawableStart="@drawable/ic_add"
android:layout_width="match_parent"
android:layout_height="50dp"
android:text="Add new feed"
/>
<Button
android:id="@+id/settings_button"
android:drawableStart="@drawable/ic_settings"
android:layout_width="match_parent"
android:layout_height="50dp"
android:text="Settings"
/>
<Button
android:id="@+id/logout_button"
android:drawableStart="@drawable/ic_exit"
android:layout_width="match_parent"
android:layout_height="50dp"
android:text="Log Out"
/>
</LinearLayout>
</ScrollView>
结果，我可以轻松地将按钮和其他元素添加到NavigationView侧抽屉），并且所有这些都可以在一个 common 中很好地工作ScrollView。这里的主要用途是当您需要将多个ListViews 和s 组合在一个可以处理滚动ExpandableListView的 common中时。ScrollView
Use this method this will calculate the ExpendableListSize at run time.
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();
}
}
}
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();
}
An call this method in your setOnGroupClickListener.like below
mExpandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
setListViewHeight(parent, groupPosition);
return false;
}
});
我们不能在滚动视图中使用列表视图、网格视图或可扩展列表视图。如果您不想在滚动视图中使用可扩展列表视图，那么您必须为可扩展列表视图提供一些固定高度。