二级菜单

来源：互联网发布：见过的高人知乎编辑：程序博客网时间：2024/04/26 21:35

import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.ExpandableListView;import com.bawei.zhoukao_21.R;import com.bawei.zhoukao_21.bean.WeatherBean;import com.bawei.zhoukao_21.url.Url;import com.bawei.zhoukao_21.utils.MyAsyncTask;import com.google.gson.Gson;import java.util.ArrayList;import java.util.LinkedList;import java.util.List;public class MainActivity extends AppCompatActivity {    private ExpandableListView mExpandableListView;    private ArrayList<WeatherBean.ResultBean> mArrayList;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();        initData();    }    private void initView() {        mExpandableListView = (ExpandableListView) findViewById(R.id.main_explistview);        mExpandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {            @Override            public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {                expand_group(groupPosition);                return true;            }        });    }    private void initData() {        MyAsyncTask asyncTask = new MyAsyncTask() {            @Override            protected void onPostExecute(String s) {                super.onPostExecute(s);                Gson gson = new Gson();                WeatherBean weatherBean = gson.fromJson(s, WeatherBean.class);                //解析完 获得相应的集合                List<WeatherBean.ResultBean> resultList = weatherBean.getResult();                //获得处理后 显示的集合                mArrayList = dispose_list(resultList);                MyAdapter myAdapter = new MyAdapter(MainActivity.this, mArrayList);                mExpandableListView.setAdapter(myAdapter);            }        };        asyncTask.execute(Url.url);    }    //处理 解析出来的集合    private ArrayList<WeatherBean.ResultBean> dispose_list(List<WeatherBean.ResultBean> list) {        //new 一个最后需要的集合        ArrayList<WeatherBean.ResultBean> f_list = new ArrayList<WeatherBean.ResultBean>();                       for (int i = 0; i < list.size(); ) {            WeatherBean.ResultBean resultBean = list.get(i);            int id = Integer.parseInt(resultBean.getParentid());                        if (id == 0) {                resultBean.setChild_list(new ArrayList<WeatherBean.ResultBean>());                f_list.add(resultBean);                               list.remove(i);            } else if (id != 0) {                               break;            } else {                i++;            }        }               for (int i = 0; i < f_list.size(); i++) {            WeatherBean.ResultBean bean = f_list.get(i);            int id = Integer.parseInt(bean.getCityid());                        for (int k = 0; k < list.size(); ) {                WeatherBean.ResultBean city_child = list.get(k);                int child_id = Integer.parseInt(city_child.getParentid());                if (child_id == id) {                    bean.getChild_list().add(city_child);                    list.remove(k);                } else {                    k++;                }            }        }        return f_list;    }    //设置 点开一个 关闭其它    private void expand_group(int groupPosition) {        for (int i = 0; i < mArrayList.size(); i++) {            if (i == groupPosition) {                //当前条目是否展开  展开则关闭  关闭则展开                if (mExpandableListView.isGroupExpanded(groupPosition)) {                    mExpandableListView.collapseGroup(i);                    return;                } else {                    mExpandableListView.expandGroup(i);                }            } else {                mExpandableListView.collapseGroup(i);            }        }    }}

package com.bawei.zhoukao_21.activity;import android.content.Context;import android.view.Gravity;import android.view.View;import android.view.ViewGroup;import android.widget.BaseExpandableListAdapter;import android.widget.TextView;import com.bawei.zhoukao_21.bean.WeatherBean;import java.util.ArrayList;/** * 类用途： * 作者：史壮壮 * 时间：2017/4/9 21:13 */public class MyAdapter extends BaseExpandableListAdapter {    private Context context;    private ArrayList<WeatherBean.ResultBean> arrayList;    public MyAdapter(Context context, ArrayList<WeatherBean.ResultBean> arrayList) {        this.context = context;        this.arrayList = arrayList;    }    @Override    public int getGroupCount() {        return arrayList.size();    }    @Override    public int getChildrenCount(int groupPosition) {        return arrayList.get(groupPosition).getChild_list().size();    }    @Override    public Object getGroup(int groupPosition) {        return arrayList.get(groupPosition);    }    @Override    public Object getChild(int groupPosition, int childPosition) {        return arrayList.get(groupPosition).getChild_list().get(childPosition);    }    @Override    public long getGroupId(int groupPosition) {        return groupPosition;    }    @Override    public long getChildId(int groupPosition, int childPosition) {        return childPosition;    }    @Override    public boolean hasStableIds() {        return false;    }    @Override    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {        String city = arrayList.get(groupPosition).getCity();        View view = get_group_TextView(city);        return view;    }    @Override    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {        String s = arrayList.get(groupPosition).getChild_list().get(childPosition).getCity();        View view = get_child_TextView(s);        return view;    }    @Override    public boolean isChildSelectable(int groupPosition, int childPosition) {        return false;    }    private View get_group_TextView(String text) {        TextView tv = new TextView(context);        tv.setGravity(Gravity.CENTER);        tv.setPadding(5, 5, 5, 5);        tv.setTextSize(25);        tv.setText(text);        return tv;    }    private View get_child_TextView(String text) {        TextView tv = new TextView(context);        tv.setPadding(5, 5, 5, 5);        tv.setGravity(Gravity.CENTER);        tv.setTextSize(20);        tv.setText(text);        return tv;    }}

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