自定义一下BaseAdapter

我们很多时候需要去自定义一下BaseAdapter，很常用的一个东西，希望对需要的人有帮助
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标签： Android SDK

代码片段(4)

[图片] 菜2.jpg

[图片] 菜.jpg

[代码] 主类

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package com.android.wei.zidingyib;

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import android.app.Activity;

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import android.app.AlertDialog;

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import android.os.Bundle;

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import android.view.View;

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import android.view.View.OnClickListener;

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import android.widget.ImageButton;

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import android.widget.ListView;

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import java.util.*;

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public class MyActivity extends Activity {

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    private ListView listView;

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    private ImageButton imageButton;

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    private ListViewAdapter listViewAdapter;

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    private List<Map<String,Object>> listItems;

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    private Integer[] imgeIDs = {

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        R.drawable.niao,R.drawable.niao,R.drawable.rui,R.drawable.rui,

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        R.drawable.ning,R.drawable.ning

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    };

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    private String[] goodsNames={

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        "土豆丝","土豆块","土豆泥","红烧土豆",

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        "麻辣土豆","清蒸土豆"

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    };

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    private String[] goodsDetails={

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        "土豆丝：便宜又好吃",    "土豆丝：便宜又好吃",    "土豆丝：便宜又好吃",   

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        "土豆丝：便宜又好吃",    "土豆丝：便宜又好吃",    "土豆丝：便宜又好吃",

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    };

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    private int[] money={

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        2,3,3,10,8,13  

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    };

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    public void onCreate(Bundle savedInstanceState) {

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        super.onCreate(savedInstanceState);

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        setContentView(R.layout.main);

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        listView=(ListView) this.findViewById(R.id.listview);

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        imageButton = (ImageButton) this.findViewById(R.id.imagebutton);

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        imageButton.setOnClickListener(new  ClickEvent());

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        listItems = getListItems();

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        listViewAdapter = new ListViewAdapter(this,listItems);

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        listView.setAdapter(listViewAdapter);

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    }

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    private List<Map<String,Object>> getListItems(){

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        List<Map<String,Object>> listItems = new ArrayList<Map<String,Object>>();

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        for(int i=0;i<goodsNames.length;i++){

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            Map<String,Object> map = new HashMap<String,Object>();

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            map.put("image", imgeIDs[i]);

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            map.put("title", goodsNames[i]);

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            map.put("info", money[i]+"元");

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            map.put("detail", goodsDetails[i]);

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            listItems.add(map);

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        }

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        return listItems;

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    }

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    class ClickEvent implements OnClickListener{

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        public void onClick(View v){

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            String goodsList="";

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            int sun=0;

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            for(int i=0;i<listItems.size();i++){

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                goodsList += listViewAdapter.hasChecked(i)?goodsNames[i]+" ":"";

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                sun +=listViewAdapter.hasChecked(i)?money[i]:0;

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            }

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            new AlertDialog.Builder(MyActivity.this)

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            .setTitle("点菜清单")

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            .setMessage("你好，你选择的菜：\n"+goodsList+"\n"+"总消费额为："+sun+"元")

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            .setPositiveButton("确定",null)

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            .show();

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        }

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    }

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}

[代码] 自定义的类

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package com.android.wei.zidingyib;

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import java.util.List;

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import java.util.Map;

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import android.app.AlertDialog;

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import android.content.Context;

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import android.view.LayoutInflater;

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import android.view.View;

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import android.view.ViewGroup;

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import android.widget.BaseAdapter;

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import android.widget.Button;

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import android.widget.CheckBox;

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import android.widget.CompoundButton;

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import android.widget.ImageView;

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import android.widget.TextView;

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public class ListViewAdapter extends BaseAdapter{

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    private Context context;

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    private List<Map<String,Object>> listItems;

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    private LayoutInflater listContainer;

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    private boolean[] hasChecked;

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    public final class ListItemView{

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        public ImageView image;

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        public TextView title;

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        public TextView info;

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        public CheckBox check;

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        public Button detail;

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    }

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    public ListViewAdapter(Context context,List<Map<String,Object>> listItems){

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        this.context = context;

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        listContainer = LayoutInflater.from(context);

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        this.listItems = listItems;

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        hasChecked = new boolean[getCount()];

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    }

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    @Override

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    public int getCount() {

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        // TODO Auto-generated method stub

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        return listItems.size();

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    }

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    @Override

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    public Object getItem(int position) {

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        // TODO Auto-generated method stub

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        return null;

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    }

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    @Override

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    public long getItemId(int position) {

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        // TODO Auto-generated method stub

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        return 0;

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    }

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    private void checkedChange(int checkedID){

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        hasChecked[checkedID] = !hasChecked[checkedID];

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    }

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    public boolean hasChecked(int checkedID){

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        return hasChecked[checkedID];

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    }

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    private void showDetailInfo(int clickID){

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        new AlertDialog.Builder(context)

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           .setTitle("本菜详情:"+listItems.get(clickID).get("title"))

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           .setMessage(listItems.get(clickID).get("detail").toString())

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           .setPositiveButton("确定",null)

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           .show();

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    }

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    @Override

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    public View getView(int position, View convertView, ViewGroup parent) {

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        final int selectID= position;

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        ListItemView listItemView = null;

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        if(convertView ==null){

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            listItemView = new ListItemView();

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            convertView = listContainer.inflate(R.layout.list_item, null);

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            //获得控件对象

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            listItemView.image =(ImageView) convertView.findViewById(R.id.imageitem);

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            listItemView.title =(TextView) convertView.findViewById(R.id.textview);

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            listItemView.info =(TextView) convertView.findViewById(R.id.textview1);

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            listItemView.detail=(Button) convertView.findViewById(R.id.button);

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            listItemView.check = (CheckBox) convertView.findViewById(R.id.checkItem);

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           //设置空间集到convertView

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            convertView.setTag(listItemView);

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        }else{

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            listItemView = (ListItemView) convertView.getTag();

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        }

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        //设置文字图片

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        listItemView.image.setBackgroundResource((Integer)listItems.get(position).get("image"));

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        listItemView.title.setText((String)listItems.get(position).get("title"));

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        listItemView.info.setText((String) listItems.get(position).get("info"));

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        listItemView.detail.setText("本菜介绍");

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        listItemView.detail.setOnClickListener(new View.OnClickListener() {

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            @Override

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            public void onClick(View v) {

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                // TODO Auto-generated method stub

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                showDetailInfo(selectID);

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            }

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        });

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        listItemView.check.setOnCheckedChangeListener(newCheckBox.OnCheckedChangeListener(){

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            public void onCheckedChanged(CompoundButton buttonView,booleanisChecked){

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                checkedChange(selectID);

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            }

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        });

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        return convertView;

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    }

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}