ANDROID笔记:ExpandableListView和Adapter的简单使用

package com.example.adaptertest.doubleadapter;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ExpandableListView;

import com.example.adaptertest.R;

public class ExpandListViewActivity extends Activity {
    private String[] groupStrings = { "家人", "同事", "朋友" };
    private String[][] personStrings = { { "爸", "妈" }, { "同事1", "同事2" },
            { "朋友1", "朋友2" } };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_expandlistview);
        ExpandableListView expandableListView = (ExpandableListView) findViewById(R.id.expandlistview_list);
        expandableListView.setAdapter(new BaseExpandListViewAdapter(
                ExpandListViewActivity.this, groupStrings, personStrings));

    }

}

package com.example.adaptertest.doubleadapter;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;
import android.widget.Toast;

import com.example.adaptertest.R;

public class BaseExpandListViewAdapter extends BaseExpandableListAdapter {
    private LayoutInflater inflater;
    private String[] groupStrings;
    private String[][] personStrings;
    private Context context;

    public BaseExpandListViewAdapter(Context context, String[] groupStrings,
            String[][] personStrings) {
        this.groupStrings = groupStrings;
        this.context = context;
        this.personStrings = personStrings;
        inflater = LayoutInflater.from(context);
    }

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

    @Override
    public int getChildrenCount(int groupPosition) {
        // TODO Auto-generated method stub
        return personStrings[groupPosition].length;
    }

    @Override
    public Object getGroup(int groupPosition) {
        // TODO Auto-generated method stub
        return groupStrings[groupPosition];
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) {
        // TODO Auto-generated method stub
        return personStrings[groupPosition][childPosition];
    }

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

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        // TODO Auto-generated method stub
        return 0;
    }

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

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
            View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        View view = inflater.inflate(R.layout.expandlistview_item, null);
        TextView textView = (TextView) view.findViewById(R.id.expand_text);
        textView.setText(groupStrings[groupPosition]);
        return view;
    }

    @Override
    public View getChildView(final int groupPosition, final int childPosition,
            boolean isLastChild, View convertView, ViewGroup parent) {
        View view = inflater.inflate(R.layout.expandlistview_childitem, null);
        view.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Toast.makeText(context,
                        personStrings[groupPosition][childPosition],
                        Toast.LENGTH_SHORT).show();
            }
        });
        TextView textView = (TextView) view
                .findViewById(R.id.expand_child_text);
        textView.setText(personStrings[groupPosition][childPosition]);
        return view;
    }

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

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <ExpandableListView
        android:id="@+id/expandlistview_list"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
    </ExpandableListView>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher" />

    <TextView
        android:id="@+id/expand_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="测试"
        android:textSize="30sp" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher" 
        android:layout_marginLeft="40dp"/>

    <TextView
        android:id="@+id/expand_child_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="测试"
        android:textSize="30sp" />

</LinearLayout>