Question

这可能是一个非常简单的问题，但我正在寻找你的帮助。我使用下载的开源文件。我有一个包含填充儿童的群组列表。我能够扩展列表并查看孩子的内容。如何在点击特定儿童时打开带有文本信息关联器的新活动窗口？

感谢您的支持。

MainActivity.java：

package com.example.expandablelistviewsearch;

import android.app.Activity;
import android.app.SearchManager;
import android.content.Context;
import android.os.Bundle;
import android.view.Menu;
import android.widget.ExpandableListView;
import android.widget.SearchView;
import android.widget.ExpandableListView.OnChildClickListener; 
import java.util.ArrayList;

public class MainActivity extends Activity implements

        SearchView.OnQueryTextListener, SearchView.OnCloseListener {

    private SearchView search;
    private MyListAdapter listAdapter;
    private ExpandableListView myList;
    private ArrayList<Continent> continentList = new ArrayList<Continent>();


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        myList.setOnChildClickListener(myListItemClicked); //added line

        SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
        search = (SearchView) findViewById(R.id.search);
        search.setSearchableInfo(searchManager
                .getSearchableInfo(getComponentName()));
        search.setIconifiedByDefault(true);
        search.setOnQueryTextListener(this);
        //search.setOnCloseListener(this);

        // display the list
        displayList();
        // expand all Groups
        //expandAll();

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    // method to expand all groups
    private void expandAll() {
        int count = listAdapter.getGroupCount();
        for (int i = 0; i < count; i++) {
            myList.expandGroup(i);
        }
    }
    private OnChildClickListener myListItemClicked =  new OnChildClickListener() {

        public boolean onChildClick(ExpandableListView parent, View v,
                                    int groupPosition, int childPosition, long id) {

            //get the group header
            HeaderInfo headerInfo = deptList.get(groupPosition);
            //get the child info
            DetailInfo detailInfo =  headerInfo.getProductList().get(childPosition);
            //start new activity with specific child information

            return false;
        }

    };
    // method to expand all groups
    private void displayList() {

        // display the list
        loadSomeData();

        // get reference to the ExpandableListView
        myList = (ExpandableListView) findViewById(R.id.expandableList);
        // create the adapter by passing your ArrayList data
        listAdapter = new MyListAdapter(MainActivity.this, continentList);
        // attach the adapter to the list
        myList.setAdapter(listAdapter);

    }

            private void loadSomeData() {
            ArrayList<Country> countryList = new ArrayList<Country>();
            Country country = new Country("Test1", "Test2", "Test3");
            countryList.add(country);

            Continent continent = new Continent("Main Test", countryList);
            continentList.add(continent);


            private void loadSomeData() {
            ArrayList<Country> countryList = new ArrayList<Country>();
            Country country = new Country("Test1", "Test2", "Test3");
            countryList.add(country);

            Continent continent = new Continent("Main Tes1t", countryList);
            continentList.add(continent);


            private void loadSomeData() {
            ArrayList<Country> countryList = new ArrayList<Country>();
            Country country = new Country("Test1", "Test2", "Test3");
            countryList.add(country);

            Continent continent = new Continent("Main Test2", countryList);
            continentList.add(continent);

        }


        @Override
        public boolean onClose() {
            // TODO Auto-generated method stub
            listAdapter.filterData("");
            //expandAll();
            return true;
        }

        @Override
        public boolean onQueryTextChange(String newText) {
            // TODO Auto-generated method stub
            listAdapter.filterData(newText);
            expandAll();
            return false;
        }

        @Override
        public boolean onQueryTextSubmit(String query) {
            // TODO Auto-generated method stub
            listAdapter.filterData(query);
            expandAll();
            return false;
        }

    }

MyListAdapter.java

package com.example.expandablelistviewsearch;

import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;

import java.util.ArrayList;

public class MyListAdapter extends BaseExpandableListAdapter {

    private Context context;
    private ArrayList<Continent> continentList;
    private ArrayList<Continent> originalList;

    public MyListAdapter(Context context, ArrayList<Continent> continentList) {
        this.context = context;
        this.continentList = new ArrayList<Continent>();
        this.continentList.addAll(continentList);
        this.originalList = new ArrayList<Continent>();
        this.originalList.addAll(continentList);
    }
    @Override
    public Object getChild(int groupPosition, int childPosition) {
        // TODO Auto-generated method stub
        ArrayList<Country> countryList = continentList.get(groupPosition).getCountryList();
        return countryList.get(childPosition);
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        // TODO Auto-generated method stub
        return childPosition;
    }

    @Override
    public View getChildView(int groupPosition, int childPosition,
            boolean isLastChild, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub

        Country country = (Country) getChild(groupPosition, childPosition);
        if(convertView == null)
        {
            LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = layoutInflater.inflate(R.layout.child_row, null);
        }

        TextView code = (TextView) convertView.findViewById(R.id.code);
        TextView name = (TextView) convertView.findViewById(R.id.name);
        TextView fdd = (TextView) convertView.findViewById(R.id.fdd);
        code.setText(country.getCode().trim());
        name.setText(country.getName().trim());
        fdd.setText(country.getFdd().trim());
        //population.setText(NumberFormat.getNumberInstance(Locale.US).format(country.getPopulation()));

        return convertView;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        // TODO Auto-generated method stub
        ArrayList<Country> countryList = continentList.get(groupPosition).getCountryList();
        return countryList.size();
    }

    @Override
    public Object getGroup(int groupPosition) {
        // TODO Auto-generated method stub
        return continentList.get(groupPosition);
    }

    @Override
    public int getGroupCount() {
        // TODO Auto-generated method stub
        return continentList.size();
    }

    @Override
    public long getGroupId(int groupPosition) {
        // TODO Auto-generated method stub
        return groupPosition;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
            View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        Continent continent = (Continent) getGroup(groupPosition);
        if(convertView == null)
        {
            LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = layoutInflater.inflate(R.layout.group_row, null);
        }

        TextView heading = (TextView) convertView.findViewById(R.id.heading);
        heading.setText(continent.getName().trim());

        return convertView;
    }

    @Override
    public boolean hasStableIds() {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        // TODO Auto-generated method stub
        return true;
    }

    public void filterData(String query)
    {
        query = query.toLowerCase();
        Log.v("MyListAdapter", String.valueOf(continentList.size()));
        continentList.clear();

        if(query.isEmpty())
        {
            continentList.addAll(originalList);
        } else {
            for(Continent continent: originalList)
            {
                ArrayList<Country> countryList = continent.getCountryList();
                ArrayList<Country> newList = new ArrayList<Country>();
                for(Country country: countryList)
                {
                    if(country.getCode().toLowerCase().contains(query) || country.getName().toLowerCase().contains(query))
                    {
                        newList.add(country);
                    }
                }
                if(newList.size() > 0)
                {
                    Continent nContinent = new Continent(continent.getName(), newList);
                    continentList.add(nContinent);
                }
            }
        }

        Log.v("MyListAdapter", String.valueOf(continentList.size()));
        notifyDataSetChanged();
    }
}

Answer 1

您几乎就在那里，根据您的代码，您可以使用意图将与您点击的孩子相关的任何内容发送到新活动，然后在新活动中获取信息

private OnChildClickListener myListItemClicked =  new     OnChildClickListener() {

    public boolean onChildClick(ExpandableListView parent, View v,
                                int groupPosition, int childPosition, long id) {

        //get the group header
        HeaderInfo headerInfo = deptList.get(groupPosition);
        //get the child info
        DetailInfo detailInfo =  headerInfo.getProductList().get(childPosition);
        //start new activity with specific child information
        //--Add below codes to your code 
        Intent myIntent = new Intent(MainActivity.this, TargetActivity.class);
        myIntent.putExtra("information",detailInfo.getInfor());
        return false;
    }

};

在TargetActivity中，

    Intent tIntent= getIntent();
    Bundle b = tIntent.getExtras();
    String information = (String)b.get("information");

字符串信息可能是您想要显示的内容

可扩展列表视图，子项单击带有信息的新活动

1 个答案: