Android BaseAdapter用法

1.兩個布局檔案listview和listitem

 第一個布局檔案

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

<ListView 

 android:id="@+id/listview"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:divider="#ff0000"

    android:dividerHeight="2dp"

    />

</LinearLayout>

弟二個布局檔案

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

  xmlns:android="http://schemas.android.com/apk/res/android"

  android:orientation="horizontal"

  android:layout_width="match_parent"

  android:layout_height="match_parent">

  <ImageView

   android:layout_width="50dp"

   android:layout_height="50dp"

   android:id="@+id/imageview"/>

  <TextView

   android:layout_width="150dp"

   android:layout_height="50dp"

   android:id="@+id/textview"/>

  <CheckBox

   android:layout_width="wrap_content"

   android:layout_height="wrap_content"

   android:id="@+id/checkbox"/>

</LinearLayout>

java檔案

package com.example.baseadapter;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import android.os.Bundle;

import android.app.Activity;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AdapterView;

import android.widget.BaseAdapter;

import android.widget.CheckBox;

import android.widget.CompoundButton;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.CompoundButton.OnCheckedChangeListener;

public class MainActivity extends Activity {

 private ListView listview;

 private String[] names = {"寮犱笁","鏉庡洓","鐜嬩簲"};

 private int[] images = {R.drawable.a,R.drawable.b,R.drawable.c};

 private String[] states = {"0","0","0"};

 MyAdapter adapter;

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

 @Override

 protected void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.activity_main);

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

        loadData();

        adapter = new MyAdapter();

        listview.setAdapter(adapter);

        listview.setOnItemClickListener(new OnItemClickListener() {

   @Override

   public void onItemClick(AdapterView<?> parent, View view,

     int position, long id) {

    // TODO Auto-generated method stub

    if(list.get(position).get("state").toString().equals("1")){

     list.get(position).put("state", "0");

    }

    else {

     list.get(position).put("state","1");

    }

    adapter.notifyDataSetChanged();

   }

  });

 }

 public void loadData(){

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

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

   map.put("name", names[i]);

   map.put("image", images[i]);

   map.put("state", states[i]);

   list.add(map);

  }

    }

    class MyAdapter extends BaseAdapter{

  @Override

  public int getCount() {

   // TODO Auto-generated method stub

   return list.size();

  }

  @Override

  public Object getItem(int position) {

   // TODO Auto-generated method stub

   return null;

  }

  @Override

  public long getItemId(int position) {

   // TODO Auto-generated method stub

   return 0;

  }

  @Override

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

   // TODO Auto-generated method stub

   LayoutInflater l = LayoutInflater.from(MainActivity.this);

   View view = l.inflate(R.layout.item, null);

   ImageView imageview = (ImageView)view.findViewById(R.id.imageview);

   imageview.setImageResource(Integer.parseInt(list.get(position).get("image").toString()));

   TextView textview = (TextView)view.findViewById(R.id.textview);

   textview.setText(list.get(position).get("name").toString());

   CheckBox checkbox = (CheckBox)view.findViewById(R.id.checkbox);

   checkbox.setFocusable(false);

   if(list.get(position).get("state").equals("1")){

    checkbox.setChecked(true);

   }

   else {

    checkbox.setChecked(false);

   }

   checkbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {

    @Override

    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

     // TODO Auto-generated method stub

     if(isChecked){

      list.get(position).put("state", "1");

     }

     else {

      list.get(position).put("state", "0");

     }

    }

   });

   return view;

  }

    }

 @Override

 public boolean onCreateOptionsMenu(Menu menu) {

  // Inflate the menu; this adds items to the action bar if it is present.

  getMenuInflater().inflate(R.menu.activity_main, menu);

  return true;

 }

}