Kev*_*vie 16 android expandablelistview android-nestedscrollview
我有一个ExpandableListView内部NestedScrollView(是的我知道,在另一个滚动视图中有一个滚动视图是不好的,但我不知道还有什么要做,请告诉我,如果有人知道更好的方法).
内容的大小NestedScrollView仍然在屏幕内,因此它不会滚动,但是当ExpandableListView展开时,内容将泄漏到屏幕外但NestedScrollView仍然不会滚动..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>
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V-r*_*hit 61
你可以使用NonScrollExpandableListView你可以实现任何非滚动财产Lisview或GridView或ExpandableListView通过覆盖下面的方法.
@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();
}
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因此,对于使用,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();
}
}
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并使用它.
<com.example.extraclasses.NonScrollExpandableListView
android:layout_width="match_parent"
android:layout_height="wrap_content" />
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快乐的编码.
V-rund Puro-hit的答案对我有用。但需要进行一些修改才能与支持 API >19 的 Kotlin 配合使用。因此,为了节省某人的时间,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
}
}
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...我这样使用它:
<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>
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因此,我可以轻松地将按钮和其他元素添加到NavigationView侧抽屉中),并且这一切都可以在一个 common 中很好地工作ScrollView。这里的主要用途是当您需要在一个公共内部组合多个ListViews 和s来处理滚动。ExpandableListViewScrollView
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