expandablelistview的group元素上的多次单击事件

Question

我有两个关于groupView的expandablelistview点击事件的问题（不是孩子）

1. 当我在GroupView中有孩子时，我可以使用以下代码段获取groupPosition

   expandableListView.setOnGroupClickListener（new ExpandableListView.OnGroupClickListener（）{

     @Override public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) { Log.d("Clicked on item: ", ""+groupPosition); return false; } }); 

但是当我没有孩子时， 不幸的是，“ MyApp”在单击鼠标时已停止 。 在这种情况下，如何获取groupPosition？

2. 我的expandablelistview的groupView布局中有两个按钮。 现在，我需要为两个按钮注册两个不同的单击事件。 这个groupView也没有孩子。 我进行了彻底的搜索，但是对此一无所知。

     <LinearLayout android:layout_below="@id/qtd_prc_cont" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center"> <Textview android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/group_text" android:text="Group 1" /> <Button android:id="@+id/btn_reject" android:layout_width="90dp" android:layout_height="30dp" android:text="Reject" android:textAllCaps="false" android:background="@drawable/reject_button_styles" android:layout_marginRight="60dp" android:textColor="#a1a2a1" android:textSize="13dp"/> <Button android:id="@+id/btn_accept" android:layout_width="90dp" android:layout_height="30dp" android:text="Accept" android:textAllCaps="false" android:background="@drawable/button_radius" android:textColor="@color/colorWhite" android:textSize="13dp"/> </LinearLayout> 

这是我的适配器类：

public class OfferedTrucksAdapter extends BaseExpandableListAdapter {
private Context context;
private ArrayList<QuotedListGroup> groups;

public OfferedTrucksAdapter(Context context, ArrayList<QuotedListGroup> groups) {
    this.context = context;
    this.groups = groups;
}

@Override
public Object getChild(int groupPosition, int childPosition) {
    ArrayList<QuotedListItem> chList = groups.get(groupPosition).getItems();
    return chList.get(childPosition);
}

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

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

    QuotedListItem child = (QuotedListItem) getChild(groupPosition, childPosition);
    if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) context
                .getSystemService(context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.activity_quoted_list_item, null);
    }
    TextView container_label = (TextView) convertView.findViewById(R.id.container);
    container_label.setText(child.getContainer());

    TextView truck_number = (TextView) convertView.findViewById(R.id.truck_number);
    truck_number.setText(child.getTruckNumber().toString());

    TextView truck_weight = (TextView) convertView.findViewById(R.id.truck_weight);
    truck_weight.setText(child.getTruckWeight().toString());

    return convertView;
}

@Override
public int getChildrenCount(int groupPosition) {
    ArrayList<QuotedListItem> chList = groups.get(groupPosition).getItems();
    return chList.size();
}

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

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

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

@Override
public View getGroupView(int groupPosition, boolean isExpanded,
                         View convertView, ViewGroup parent) {
    QuotedListGroup group = (QuotedListGroup) getGroup(groupPosition);
    if (convertView == null) {
        LayoutInflater inf = (LayoutInflater) context
                .getSystemService(context.LAYOUT_INFLATER_SERVICE);
        convertView = inf.inflate(R.layout.activity_offered_trucks_group, null);
    }

    if(groupPosition%2 == 0) {
        convertView.findViewById(R.id.offered_trucks_group).setVisibility(View.VISIBLE);
        convertView.findViewById(R.id.offered_price_group).setVisibility(View.GONE);

        TextView destination = (TextView) convertView.findViewById(R.id.offered_destination);
        destination.setText(group.getDestination());

        TextView trucks = (TextView) convertView.findViewById(R.id.offered_trucks);
        trucks.setText(group.getTrucks() + "");

        TextView date_label = (TextView) convertView.findViewById(R.id.offered_date_label);
        date_label.setText(group.getDateLabel().toString());

        TextView material = (TextView) convertView.findViewById(R.id.offered_material);
        material.setText(group.getMaterial().toString());

        TruckaroIconView see_hide_icon = (TruckaroIconView) convertView.findViewById(R.id.offered_see_hide_icon);
        TextView see_hide_label = (TextView) convertView.findViewById(R.id.offered_see_hide_label);
        if(isExpanded) {
            see_hide_label.setText("Hide Trucks");
            see_hide_icon.setRotation(180);
        } else {
            see_hide_label.setText("See Trucks");
            see_hide_icon.setRotation(0);
        }
    } else {
        convertView.findViewById(R.id.offered_trucks_group).setVisibility(View.GONE);
        convertView.findViewById(R.id.offered_price_group).setVisibility(View.VISIBLE);

        TextView offeredPrice = (TextView) convertView.findViewById(R.id.offered_price);
        offeredPrice.setText(group.getOfferedPrice());

        TextView quotedPrice = (TextView) convertView.findViewById(R.id.quoted_price);
        quotedPrice.setText(group.getQuotedPrice());

    }
    return convertView;
}

protected static class RowViewHolder {
    public Button buttonReject, buttonAccept;
}

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

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

}

基于接受/拒绝按钮的单击，我需要通过意图将Textview的数据传递到下一个活动。

这是我的可扩展列表视图的样子：

在上图中，有四个列表项。 第一和第三有孩子，但是第二和第四没有孩子。 当我单击第二元素接受按钮时，我需要将第一元素数据传递到下一个活动。 我无法在这些按钮上设置点击事件。

请帮助我。

提前致谢。

Answer 1

好的。 如果我正确理解了您的担忧，那么您的目标行为是传递上一项的元素（在屏幕截图中，如果单击了“ 接受”按钮，将从上一项中获取的值会通过一个intent 。

这是我得到的：

@Override
    public View getGroupView(final int groupPosition, boolean isExpanded,
                             View convertView, ViewGroup parent) {
        QuotedListGroup group = (QuotedListGroup) getGroup(groupPosition);
        if (convertView == null) {
            LayoutInflater inf = (LayoutInflater) context
                    .getSystemService(context.LAYOUT_INFLATER_SERVICE);
            convertView = inf.inflate(R.layout.activity_offered_trucks_group, null);
        }

        if (groupPosition % 2 == 0) {

            // Removed some code here.

        } else {
            convertView.findViewById(R.id.offered_trucks_group).setVisibility(View.GONE);
            convertView.findViewById(R.id.offered_price_group).setVisibility(View.VISIBLE);

            TextView offeredPrice = (TextView) convertView.findViewById(R.id.offered_price);
            offeredPrice.setText(group.getOfferedPrice());

            TextView quotedPrice = (TextView) convertView.findViewById(R.id.quoted_price);
            quotedPrice.setText(group.getQuotedPrice());

            // Added code here ----

            // Initialize the buttons.
            Button btnAccept = (Button) convertView.findViewById( < insert_btn_id_here >);
            Button btnReject = (Button) convertView.findViewById( < insert_btn_id_here >);

            // Set onClickListeners for the buttons.
            btnAccept.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {

                    /*
                    Modify with the object you have, then pass the group position - 1
                    (double check this, you just need to pass the position of the upper item).
                    */
                    Object groupObject = getGroup(groupPosition - 1);

                    /*
                    Get the value from the groupObject that you want to include in the intent.
                    NOTE: I'm just using some sample codes, modify it to what you need.
                    */
                    String sampleStr = groupObject.destination.getText().toString();

                    /*
                    Intent stuff, I think you know this already.
                     */

                    Intent intent = new Intent(context, SampleActivity.class);
                    intent.putExtra("SAMPLE_KEY", sampleStr);
                    context.startActivity(intent);

                }
            });

            btnReject.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    // your code for reject button here.
                }
            });

            // Until here ----

        }

        return convertView;
    }

我只是在else语句中为按钮（接受，拒绝）添加了侦听器。 您需要将其修改为所需的内容，因为我的其余代码没有可见性。 如果您有任何问题，请告诉我。 干杯! ：D