android - 单击下一个 ExpandableListView 标题时，ExpandableListView 中的 EditText 内容消失

Question

我在 expandablelistview 子项目中有一个 edittext。然后，我在这个 edittext 中输入了一个文本，但是每当我点击其他 expandablelistview 标题时，我输入的文本就会消失。

我已经在我的 Manifest.xml 中使用了 android:windowSoftInputMode="adjustPan" 和许多其他可能的修复，但没有奏效。

这是我的适配器:

public class ExpendableAdapter extends BaseExpandableListAdapter {
    private Context _context;
    private List<String> _listDataHeader;
    private HashMap<String, List<ExpandItemModel>> _listDataChild;

public ExpendableAdapter(Context context, List<String> listDataHeader,
                             HashMap<String, List<ExpandItemModel>> listChildData) {
    this._context = context;
    this._listDataHeader = listDataHeader;
    this._listDataChild = listChildData;
}

@Override
public Object getChild(int groupPosition, int childPosititon) {
    return this._listDataChild.get(this._listDataHeader.get(groupPosition))
            .get(childPosititon);
}

@Override
public long getChildId(int groupPosition, int childPosition) {
    return childPosition;
}

@Override
public View getChildView(final int groupPosition, final int childPosition,
                         boolean isLastChild, View convertView, ViewGroup parent) {

    final ExpandItemModel childText = (ExpandItemModel) getChild(groupPosition, childPosition);

    if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) this._context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.list_item, null);
    }

    final EditText etTotal = (EditText)convertView
            .findViewById(R.id.et_total);

    etTotal.setText(childText.getTotal);

    return convertView;
}

@Override
public int getChildrenCount(int groupPosition) {
    return this._listDataChild.get(this._listDataHeader.get(groupPosition))
            .size();
}

@Override
public Object getGroup(int groupPosition) {
    return this._listDataHeader.get(groupPosition);
}

@Override
public int getGroupCount() {
    return this._listDataHeader.size();
}

@Override
public long getGroupId(int groupPosition) {
    return groupPosition;
}

@Override
public View getGroupView(int groupPosition, boolean isExpanded,
                         View convertView, ViewGroup parent) {
    String headerTitle = (String) getGroup(groupPosition);
    if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) this._context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.list_group, null);
    }



    TextView tvHeader = (TextView) convertView
            .findViewById(R.id.tv_header);
    tvHeader.setTypeface(null, Typeface.BOLD);
    tvHeader.setText(headerTitle);

    return convertView;
}

@Override
public boolean hasStableIds() {
    return true;
}


@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
}
}

这是布局:

<RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/rl_expen_but"
        android:layout_below="@+id/rl_ats_draft2"
        android:layout_above="@+id/selanjutnya"
        >



        <ExpandableListView
            android:background="@color/cardview_light_background"
            android:id="@+id/lvExp"
            android:descendantFocusability="beforeDescendants"
            android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:animateLayoutChanges="true"/>

        <View
            android:layout_below="@+id/lvExp"
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="#bebebe"/>

    </RelativeLayout>

我上面的代码有什么问题吗？谢谢。

编辑:

这是我按照 chandil03 的建议编辑代码后的样子。当我展开标题时，可扩展 ListView 不再刷新。但奇怪的是，当我在组位置 0 和子位置 0 的 edittext 中键入值时，然后在不同 goupposition 和 childposition 的其他一些 edittext 中出现我在先前的 edittext 中键入的相同值。或者更奇怪的是，以前的编辑文本中的值有时会消失。

static class ViewHolder {
    protected View et;

    public void addView(View et){
        this.et = et;
    }
}

       @Override
       public View getChildView(final int groupPosition, final int childPosition,
                     boolean isLastChild, View convertView, ViewGroup parent) {

       final ExpandItemModel childText = (ExpandItemModel) getChild(groupPosition, childPosition);

       ViewHolder viewHolder;

       if (convertView == null) {
           LayoutInflater infalInflater = (LayoutInflater) this._context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
           convertView = infalInflater.inflate(R.layout.list_item, null);
           viewHolder = new ViewHolder();
           viewHolder.addView(convertView
                .findViewById(R.id.et_total));
           convertView.setTag(viewHolder);
       }else{
           viewHolder = (ViewHolder)convertView.getTag();
       }

       final EditText etTotal = (EditText)convertView
        .findViewById(R.id.et_total);

       etTotal.setText(childText.getTotal);

       return convertView;
  }

Answer 1

每当您展开另一个组时，列表就会刷新，并且您会在其中获得另一个没有文本的 EditText 实例。您在其中输入文本的 EditText 将成为另一个 groupView 的子项。

所以我建议您创建一个 ViewHolder 类并将您的 View 保存在其中并将其设置为标签，并在 getView() 中检查 convertView 是否为 null你已经完成了。只需从 convertView 添加 else 部分和 getTag 并相应地设置值。

例如:

@Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent)
    {
        View v = convertView;
        if (v == null)
        {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            v = inflater.inflate(R.layout.my_layout, parent, false);
            ViewHolder holder = new ViewHolder(); // View holder to save views.
            holder.addView(v.findViewById(R.id.myView));
            v.setTag(holder);
        }
        else{
        ViewHolder holder = (ViewHolder) v.getTag();  // get tag and set values
        // Do whatever you need to with the group view
        }
        return v;
    }

编辑 1

我已经修改了你的代码。另请查看评论。

@Override
    public View getChildView(final int groupPosition, final int childPosition,
                             boolean isLastChild, View convertView, ViewGroup parent) {

        final ExpandItemModel childText = (ExpandItemModel) getChild(groupPosition, childPosition);
        ViewHolder holder;
        if (convertView == null) {
            LayoutInflater infalInflater = (LayoutInflater) this._context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = infalInflater.inflate(R.layout.list_item, null);
            holder = new ViewHolder(convertView);
            convertView.setTag(holder);
        }else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.editText.setText(childText.getTotal); // Here whatever you will type in edittext will be overwritten by the value of 'childText.getTotal'. So after you are done writing in edit text make sore you change that in "_listDataChild" list. 

        return convertView;
    }

    /**This is a class that holds view, Here i m not talking about support.v7.widget.RecyclerView.ViewHolder class. Though concept is more or less same.*/
    class ViewHolder{
        EditText editText;

        public ViewHolder(View v)
        {
            editText = (EditText) v.findViewById(R.id.et_total);
        }
    }

编辑 2

在getChildView() 方法中添加如下代码。

holder.editText.setOnFocusChangeListener(new View.OnFocusChangeListener()
    {
        @Override
        public void onFocusChange(View v, boolean hasFocus)
        {
            if(!hasFocus)
                childText.getTotal = holder.editText.getText().toString(); 
// In java variable contains reference of Object so when you change childText object, it will be reflected in same HashMap you are getting data from.

        }
    });