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android ExpandableListView三级菜单的使用

时间:2016-07-19 13:46:45      阅读:2124      评论:0      收藏:0      [点我收藏+]

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由于本人所作的项目需要用到这种列表式的收缩与展开,因此,就好好研究了有关这方面的一些知识,当然,也借鉴了网上一些成功的案列。下面就是我模拟测试的一个展示界面。

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实现上面的这些功能,我主要是通过ExpandableListView这一控件,以及BaseExpandableListAdapter适配器。这两者关联实现的。好的,那接下来,就对这些进行详细的展示。

  • 所有的xml布局展示
    ## activity_main.xml##
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.administrator.expandablelistviewdemo1.MainActivity">

    <ExpandableListView
        android:id="@+id/expand_list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:groupIndicator="@null"/>
</RelativeLayout>
## parent_group_item.xml##
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:paddingLeft="10dp" >

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="50dp"
        android:gravity="center_vertical"
        android:text="121"/>
    <TextView
        android:id="@+id/kpi_score"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/title"
        android:layout_centerVertical="true"
        android:layout_marginLeft="10dp"
        android:text="80分"/>
    <ImageView
        android:id="@+id/kpi_back_img"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/up"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:layout_marginRight="20dp"
        />
</RelativeLayout>
## child_adapter.xml##
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="50dp" >

        <TextView
            android:id="@+id/childGroupTV"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:paddingLeft="40dp" />
        <ImageView
            android:id="@+id/kpi_back_img"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/up"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:layout_marginRight="20dp"
            />
        <TextView
            android:id="@+id/score_value"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:gravity="center"
            android:visibility="gone"
            android:background="@drawable/score_bg"
            android:text="10分"
            android:layout_marginRight="50dp"
            />
    </RelativeLayout>

</LinearLayout>
## child_child.xml##
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="50dp" >

        <TextView
            android:id="@+id/childGroupTV"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:paddingLeft="60dp" />
        <TextView
            android:id="@+id/score_value"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:gravity="center"
            android:visibility="gone"
            android:background="@drawable/score_bg"
            android:text="10分"
            android:layout_marginRight="50dp"
            />
    </RelativeLayout>

</LinearLayout>
## activity_content.xml##
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.administrator.expandablelistviewdemo1.ContentActivity">
    <TextView
        android:id="@+id/content"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:textSize="40dp"
        android:textColor="#ff0000"
        />
</RelativeLayout>
  • 接下来就是获取数据、适配数据,以及对控件的操作事件。首先是获取数据,由于项目接口不宜公开,固这里采用的是测试数据其主要代码如下。
 /**
     * 初始化数据
     */
    private void initData() {
        for(int i=0;i<4;i++){
            FirstBean firstBean = new FirstBean();
            ArrayList<SecondBean> mArrlistSecondBean = new ArrayList<SecondBean>();
            if(i==0){
                firstBean.setScore("80分");
                firstBean.setTitle("KPI  关键能力");
            }else if(i==1){
                firstBean.setScore("10分");
                firstBean.setTitle("API  工作态度");
            }else if(i==2){
                firstBean.setScore("10分");
                firstBean.setTitle("LPI  团队建设");
            }else if(i==3){
                firstBean.setScore("5分");
                firstBean.setTitle("WPI  特殊事件");
            }
            for(int j=0;j<3;j++){
                SecondBean secondBean = new SecondBean();
                secondBean.setTitle("第"+i+"个二级标题");
                ArrayList<ThirdBean> mArrlistBean = new ArrayList<ThirdBean>();
                for(int k=0;k<2;k++){
                    ThirdBean thirdBean = new ThirdBean();
                    thirdBean.setTitle("第"+k+"个三级标题");
                    mArrlistBean.add(thirdBean);
                }
                secondBean.setSecondBean(mArrlistBean);
                mArrlistSecondBean.add(secondBean);
            }
            firstBean.setFirstData(mArrlistSecondBean);
            mDatas.add(firstBean);

            Log.e("xxx",mDatas.get(i).getTitle());
        }
    }
  • 由于是三级菜单,所以这里的实体用了3个,理论上,n级菜单的话,那就得n个实体,但是一般的app用到的至多就是3级,4级以上的都比较少见。其适配器那就得用两个。接下来讲解第一个适配器,它不是继承BaseAdapter,继承的是BaseExpandableListAdapter,通过重写它的方法能很好的把数据与控件结合在一起。其主要的方法有:getGroupView()、getChildView()….主要代码如下。
/**
     *  第一级菜单适配器布局
     * @param parentPosition
     * @param isExpanded
     *
     * @param convertView
     * @param viewGroup
     * @return
     */
    @Override
    public View getGroupView(int parentPosition, boolean isExpanded, View convertView, ViewGroup viewGroup) {
        if (convertView == null) {
            convertView = LayoutInflater.from(mContext).inflate(
                    R.layout.parent_group_item, null);
            holder = new ViewHolder();
            holder.upImg = (ImageView) convertView.findViewById(R.id.kpi_back_img);
            holder.score = (TextView) convertView.findViewById(R.id.kpi_score);
            holder.title = (TextView) convertView.findViewById(R.id.title);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        //区分箭头往上还是
        if(isExpanded){
            holder.upImg.setImageResource(R.drawable.dowm);
        }else{
            holder.upImg.setImageResource(R.drawable.up);
        }
        holder.title.setText(mData.get(parentPosition).getTitle());
        holder.score.setText(mData.get(parentPosition).getScore());
        return convertView;
    }
    class ViewHolder{
        private TextView title;
        private TextView score;
        private ImageView upImg;
    }
    public ExpandableListView getExpandableListView() {
        ExpandableListView mExpandableListView = new ExpandableListView(
                mContext);
        AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT, (int) mContext
                .getResources().getDimension(
                        R.dimen.parent_list_height));
        mExpandableListView.setLayoutParams(lp);
        mExpandableListView.setDividerHeight(0);// 取消group项的分割线
        mExpandableListView.setChildDivider(null);// 取消child项的分割线
        mExpandableListView.setGroupIndicator(null);// 取消展开折叠的指示图标
        return mExpandableListView;
    }
    /**
     * 第二级菜单式配
     * @param parentPosition
     * @param childPosition
     * @param isExpanded
     * @param view
     * @param viewGroup
     * @return
     */
    @Override
    public View getChildView(final int parentPosition, final int childPosition, boolean isExpanded, View view, ViewGroup viewGroup) {
        final ExpandableListView childListView = getExpandableListView();
        //获取子菜单的数据
        final ArrayList<SecondBean> childData = new ArrayList<SecondBean>();
        final SecondBean bean = getChild(parentPosition,childPosition);
        childData.add(bean);
        ChildAdapter adapter = new ChildAdapter(mContext,childData,parentPosition);
        childListView.setAdapter(adapter);

        /**
         * 点击最小级菜单,调用该方法
         * */
        childListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {

            @Override
            public boolean onChildClick(ExpandableListView arg0, View arg1,
                                        int groupIndex, int childIndex, long arg4) {
                if(mListener != null){
                    mListener.onclick(parentPosition,childPosition, childIndex);
                    //点击三级菜单,跳转到编辑菜单界面
                    Intent intent = new Intent(mContext, ContentActivity.class);
                    intent.putExtra("content","你点的位置是:  "+"parentPosition>>"+parentPosition+
                    "childPosition>>"+childPosition+"childIndex>>"+childIndex);
                    mContext.startActivity(intent);
                }
                return false;
            }
        });
        /**
         *子ExpandableListView展开时,因为group只有一项,所以子ExpandableListView的总高度=
         * (子ExpandableListView的child数量 + 1 )* 每一项的高度
         * */
        childListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
            @Override
            public void onGroupExpand(int groupPosition) {
                Log.e("xxx",groupPosition+"onGroupExpand>>");
                AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
                        ViewGroup.LayoutParams.MATCH_PARENT,
                        (bean.getSecondBean().size() + 1)* (int) mContext
                        .getResources().getDimension(R.dimen.parent_list_height));
                childListView.setLayoutParams(lp);
            }
        });
        /**
         *子ExpandableListView关闭时,此时只剩下group这一项,
         * 所以子ExpandableListView的总高度即为一项的高度
         * */
        childListView.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() {
            @Override
            public void onGroupCollapse(int groupPosition) {
                Log.e("xxx",groupPosition+">>onGroupCollapse");
                AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
                        ViewGroup.LayoutParams.MATCH_PARENT, (int) mContext
                        .getResources().getDimension(R.dimen.parent_list_height));
                childListView.setLayoutParams(lp);
                holder.upImg.setImageResource(R.drawable.up);
            }
        });
        /**
         * 在这里对二级菜单的点击事件进行操作
         */
        childListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
            @Override
            public boolean onGroupClick(ExpandableListView parent, View v, int Position, long id) {
//                if(isClick){
//                    holder.mUpImg.setImageResource(R.drawable.dowm);
//                    isClick = false;
//                }else{
//                    holder.mUpImg.setImageResource(R.drawable.up);
//                    isClick = true;
//                }
                Log.e("Xxx","恭喜你,点击了"+parentPosition+"childpos>>>"+childPosition);
                return false;
            }
        });
        return childListView;
    }
  • 第二个适配器与上述差不多,也是主要通过以上的方法来实现的。在这里,我就不在贴出重复的的代码了,在下面的链接,就可以下载源代码。

    源代码点此下载

android ExpandableListView三级菜单的使用

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原文地址:http://blog.csdn.net/huangf321123/article/details/51920056

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