我如何在Android中以单一布局设计ExpendableListView，RecylerView（GridView）

Question

Previously am designed expandablelistview and recyclerview inside ScrollView but i saw in stack overflow they said this is not good idea,never put a scrollable view inside another scrollable view.Then how can i design this. This is my previous code:

     <ScrollView
       xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content">

       <ExpandableListView
         android:id="@+id/secPage_explist"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:choiceMode="singleChoice"
         android:groupIndicator="@null"
         android:nestedScrollingEnabled="true"
    />

    <android.support.v7.widget.RecyclerView
      android:id="@+id/grid_recycler_template"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:background="@color/oreser_item_seperator"
    />

        </LinearLayout>
   </ScrollView>

Please tell me any one.

Answer 1

Calculate height of Expandablelistview and RecyclerView programatically and Remove Scrollview

here in below is class that caluclate height of expandable listview

public class Calculate_Height {

public static int calculateHeight_expandable(ExpandableListView list) {

    int height = 0;

    ExpandableListAdapter listAdapter = list.getExpandableListAdapter();
    if (listAdapter == null) {
        // pre-condition
        return 0;
    }

        for (int i = 0; i < listAdapter.getGroupCount(); i++) {
            View groupItem = listAdapter.getGroupView(i, false, null, list);
            groupItem.measure(
                    MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
                    MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
            height += groupItem.getMeasuredHeight();

            if (list.isGroupExpanded(i)) {
                for (int j = 0; j <listAdapter.getChildrenCount(i); j++) {
                    View listItem = listAdapter.getChildView(i, j, false, null,
                            list);
                    listItem.measure(MeasureSpec.makeMeasureSpec(0,
                            MeasureSpec.UNSPECIFIED), MeasureSpec
                            .makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
                    height += listItem.getMeasuredHeight();
                }
            }
        }

        height += list.getDividerHeight() * (list.getCount() - 1);
        Log.i("height", "" + height);
        return height;
    }
 }

set height of expandalbelistview in oncreate activity

   expandable_myitem.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
        @Override
        public void onGroupExpand(int groupPosition) {
            expandable_myitem.setLayoutParams(new LinearLayout.LayoutParams(
                    LinearLayout.LayoutParams.WRAP_CONTENT,
                    Calculate_Height.calculateHeight_expandable(expandable_myitem)));
        }
    });

---

  expandable_myitem.setOnGroupCollapseListener(new     ExpandableListView.OnGroupCollapseListener() {
        @Override
        public void onGroupCollapse(int groupPosition) {
            expandable_myitem.setLayoutParams(new   LinearLayout.LayoutParams(
                    LinearLayout.LayoutParams.WRAP_CONTENT,
                        Calculate_Height.calculateHeight_expandable(expandable_myitem)));
        }
    });

Answer 2

删除滚动视图并为线性布局添加权重，根据布局使用权重用于回收视图和列表视图，否则请使用动态高度代码来管理屏幕。