ScrollView內的Android ExpandableListView無法展開全高

Question

我正在開發一個帶有左幻燈片菜單的Android應用，其中包含一些LinearLayout和中間的ExpandableListview ，如圖所示

ExpandableListview的子視圖在下面包含一個TextView和一個ListView ，默認情況下，ListView的可見性消失了。 單擊TextView ，將顯示ListView 。

問題是，當單擊ExpandableListview的父視圖時，列表的高度也會擴展以包裝其內容。 但是，當單擊子視圖（也為TextView ）時，列表的高度不會改變，我必須向下滾動才能看到最后一個項目。

要在ScrollView中設置ExpandableListview的高度，我使用了以下代碼：

public static void setListViewHeightBasedOnChildren(ListView listView) {
    ListAdapter listAdapter = listView.getAdapter();
    if (listAdapter == null) {
        // pre-condition
        return;
    }

    int totalHeight = listView.getPaddingTop() + listView.getPaddingBottom();
    for (int i = 0; i < listAdapter.getCount(); i++) {
        View listItem = listAdapter.getView(i, null, listView);
        if(listItem instanceof SecondLevelExpandableListView)
            Log.e("abc", "SecondLevelExpandableListView");
        if (listItem instanceof ViewGroup) {
            Log.e("abc", "ViewGroup");
            listItem.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
        }
        listItem.measure(0, 0);
        totalHeight += listItem.getMeasuredHeight();
    }

    ViewGroup.LayoutParams params = listView.getLayoutParams();
    params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
    listView.setLayoutParams(params);
}

問題截圖

請幫助我解決此問題，我需要始終使用列表來包裝其內容。

提前致謝。

Answer 1

展開動畫結束時，請調用此命令：

listView.smoothScrollTo(x,y);

您可以使用listView.getScrollY-屏幕上的maxY找到y

Answer 2

Use the Snippet for ExpandableListView

    import android.content.Context;
import android.util.AttributeSet;
import android.view.ViewGroup;
import android.widget.ExpandableListView;

public class ExpandableHeightListView extends ExpandableListView {

    boolean expanded = false;

    public ExpandableHeightListView(Context context) {
        super(context);
    }

    public ExpandableHeightListView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ExpandableHeightListView(Context context, AttributeSet attrs,
            int defStyle) {
        super(context, attrs, defStyle);
    }

    public boolean isExpanded() {
        return expanded;
    }

    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // HACK! TAKE THAT ANDROID!
        if (isExpanded()) {
            // Calculate entire height by providing a very large height hint.
            // But do not use the highest 2 bits of this integer; those are
            // reserved for the MeasureSpec mode.
            int expandSpec = MeasureSpec.makeMeasureSpec(
                    Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
            super.onMeasure(widthMeasureSpec, expandSpec);

            ViewGroup.LayoutParams params = getLayoutParams();
            params.height = getMeasuredHeight();
        } else {
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    }

    public void setExpanded(boolean expanded) {
        this.expanded = expanded;
    }
}



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use <classpath for ExpandableHeightListView 
attribs
/>

*****
ExpandableHeightListView expListView = (ExpandableHeightListView)findViewById(id);