自定义的BaseAdapter实现LIstView的展示

使用自定义的BaseAdapter实现LIstView的展示

实现以下功能点：

1.通过自定义的BaseAdapter展示ListView；

2.动态修改、刷新ListView内容；

3.在自定义的BaseAdapter中实现ListView内容的点击和长按点击事件；

4.在BaseAdapter的getView方法中动态增加新组件；

效果图如下：

xml配置文件1（list_view01.xml）

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="/apk/res/android"android:orientation="vertical"android:layout_width="fill_parent"android:layout_height="fill_parent"><LinearLayoutandroid:orientation="horizontal"android:layout_width="fill_parent"android:layout_height="wrap_content"><EditText android:id="@+id/editText01Edit"android:layout_width="110sp" android:layout_height="wrap_content" android:text=""/><Button android:id="@+id/button01Edit"android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="动态修改第1行第2列数据"android:onClick="editPersonAndRefreshListView01"/></LinearLayout><ListView android:id="@+id/listView01"android:layout_width="fill_parent" android:layout_height="fill_parent" /></LinearLayout>

xml配置文件2（list_view01_item.xml）

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="/apk/res/android"android:orientation="horizontal"android:layout_width="fill_parent"android:layout_height="fill_parent"><TextView android:id="@+id/listView01Item01"android:layout_width="50sp" android:layout_height="wrap_content" /><TextView android:id="@+id/listView01Item02"android:layout_width="90sp" android:layout_height="wrap_content" /> <TextView android:id="@+id/listView01Item03"android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>

Activity类代码:

package com.zhouzijing.android;import java.util.ArrayList;import java.util.List;import com.zhouzijing.android.util.MenuEntity;import android.app.Activity;import android.os.Bundle;import android.view.ContextMenu;import android.view.ContextMenu.ContextMenuInfo;import android.view.MenuItem;import android.view.View;import android.view.View.OnCreateContextMenuListener;import android.widget.AdapterView;import android.widget.AdapterView.AdapterContextMenuInfo;import android.widget.AdapterView.OnItemClickListener;import android.widget.AdapterView.OnItemLongClickListener;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.BaseAdapter;import android.widget.EditText;import android.widget.ListAdapter;import android.widget.ListView;import android.widget.Toast;public class ListViewDemo extends Activity {//定义PersonList<Person> persons ;ListAdapter adapter = null;ListView listView01 = null;EditText editTextPersonName = null;//定义上下文菜单 final private static int CONTEXT_MENU_EDIT = 0;//菜单[编辑]的编号 final private static int CONTEXT_MENU_SHARE = 1;//菜单[分享]的编号 final private static int CONTEXT_MENU_DELETE = 2;//菜单[删除]的编号 final private static int CONTEXT_MENU_CANCEL = 3;//菜单[取消]的编号 private MenuEntity[] contextMenus = { new MenuEntity(0, CONTEXT_MENU_EDIT, 0, "编辑"), new MenuEntity(0, CONTEXT_MENU_SHARE, 1, "分享"), new MenuEntity(0, CONTEXT_MENU_DELETE, 2, "删除"), new MenuEntity(0, CONTEXT_MENU_CANCEL, 3, "取消"), }; @Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.list_view01);//获取组件listView01 = (ListView)findViewById(R.id.listView01);editTextPersonName = (EditText)findViewById(R.id.editText01Edit);//显示ListViewinitListAllPersons();showByMyBaseAdapter();//初始化ListView的事件//initListView01Event();}public void initListAllPersons(){persons = new ArrayList<Person>();persons.add(new Person(100,"李小龙","香港",android.R.drawable.ic_delete));persons.add(new Person(101,"施瓦辛格","美国",android.R.drawable.ic_dialog_alert));persons.add(new Person(102,"戴安娜王妃","英国",android.R.drawable.ic_dialog_dialer));persons.add(new Person(103,"成龙","香港",android.R.drawable.ic_dialog_map));persons.add(new Person(104,"史泰龙","美国",android.R.drawable.ic_lock_idle_alarm));persons.add(new Person(105,"圣女贞德","法国",android.R.drawable.ic_media_next));persons.add(new Person(106,"列宁","苏联",android.R.drawable.ic_media_play));persons.add(new Person(107,"爱迪生","美国",android.R.drawable.ic_menu_add));persons.add(new Person(108,"孔子","中国",android.R.drawable.ic_media_rew));persons.add(new Person(109,"杨七郎","宋朝",android.R.drawable.ic_menu_zoom));persons.add(new Person(110,"秦始皇","秦国",android.R.drawable.ic_menu_agenda));persons.add(new Person(111,"岳飞","宋朝",android.R.drawable.ic_lock_lock));}public void showByMyBaseAdapter(){adapter = new MyBaseAdapter(this, persons);listView01.setAdapter(adapter);}/*** 按钮button01Edit的onClick事件.* @param view*/public void editPersonAndRefreshListView01(View view){//获取TextEdit数据String value = editTextPersonName.getText().toString();//更新ListView的内容，并且动态刷新.persons.get(0).name=value;((BaseAdapter) adapter).notifyDataSetChanged();}/*** 初始化listView01的事件.*/public void initListView01Event(){//ListView的item点击事件listView01.setOnItemClickListener(new OnItemClickListener(){@Overridepublic void onItemClick(AdapterView<?> parent, View view,int position, long id) {Toast.makeText(getApplicationContext(), "[OnItemClickListener]点击了："+persons.get(position).name, Toast.LENGTH_SHORT).show();}});//ListView的item长按点击事件listView01.setOnItemLongClickListener(new OnItemLongClickListener(){@Overridepublic boolean onItemLongClick(AdapterView<?> parent, View view,int position, long id) {Toast.makeText(getApplicationContext(), "[OnItemLongClickListener]点击了："+persons.get(position).name, Toast.LENGTH_SHORT).show();return false;}});//ListView的键盘选中事件(直接触摸屏幕选中不会激发)listView01.setOnItemSelectedListener(new OnItemSelectedListener(){@Overridepublic void onItemSelected(AdapterView<?> parent, View view,int position, long id) {Toast.makeText(getApplicationContext(), "[OnItemSelectedListener:onItemSelected]点击了："+persons.get(position).name, Toast.LENGTH_SHORT).show();}@Overridepublic void onNothingSelected(AdapterView<?> parent) {Toast.makeText(getApplicationContext(), "[OnItemSelectedListener:onNothingSelected]点击了", Toast.LENGTH_SHORT).show();}});//ListView组件:创建上下文菜单listView01.setOnCreateContextMenuListener(new OnCreateContextMenuListener(){@Overridepublic void onCreateContextMenu(ContextMenu menu, View v,ContextMenuInfo menuInfo) {//获取上下文菜单点击的ListView的位置(position)属性AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;int position = info.position;//设置上下文菜单标题menu.setHeaderTitle(persons.get(position).name);//设置上下文菜单栏目MenuEntity menuEntity = null; for(int i=0;i<contextMenus.length;i++){ menuEntity = contextMenus[i]; menu.add(menuEntity.getGroupId(),menuEntity.getItemId(),menuEntity.getOrder(),menuEntity.getTitle()); } }});}//监听选择上下文菜单的选择事件@Overridepublic boolean onContextItemSelected(MenuItem item) {//选中的上下文菜单的itemIdint itemId = item.getItemId();//获取上下文菜单点击的ListView的位置(position)属性AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();int position = info.position;//ToastToast.makeText(getApplicationContext(), "[onContextItemSelected]点击了"+persons.get(position).name+"" +",菜单="+contextMenus[itemId].getTitle(), Toast.LENGTH_SHORT).show();return true;}}

Person类代码

package com.zhouzijing.android;public class Person {public int id;public String name;public String address;public int photo;public Person(int id, String name, String address,int photo) {super();this.id = id;this.name = name;this.address = address;this.photo = photo;}}

自定义的BaseAdapter类代码

package com.zhouzijing.android;import java.util.List;import android.content.Context;import android.util.Log;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnLongClickListener;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TextView;import android.widget.Toast;public class MyBaseAdapter extends BaseAdapter {private List<Person> persons;Context context;public MyBaseAdapter(Context context,List<Person> persons){this.persons = persons;this.context = context;}@Overridepublic int getCount() {return (persons==null)?0:persons.size();}@Overridepublic Object getItem(int position) {return persons.get(position);}@Overridepublic long getItemId(int position) {return position;}public class ViewHolder{TextView textViewItem01;TextView textViewItem02;TextView textViewItem03;ImageView imageView;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {final Person person = (Person)getItem(position);ViewHolder viewHolder = null;if(convertView==null){Log.d("MyBaseAdapter", "新建convertView,position="+position);convertView = LayoutInflater.from(context).inflate(R.layout.list_view01_item, null);viewHolder = new ViewHolder();viewHolder.textViewItem01 = (TextView)convertView.findViewById(R.id.listView01Item01);viewHolder.textViewItem02 = (TextView)convertView.findViewById(R.id.listView01Item02);viewHolder.textViewItem03 = (TextView)convertView.findViewById(R.id.listView01Item03);//动态增加1个ImageViewviewHolder.imageView = new ImageView(context);LinearLayout.LayoutParams mParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,LinearLayout.LayoutParams.WRAP_CONTENT);mParams.gravity = Gravity.CENTER;mParams.width=50;viewHolder.imageView.setLayoutParams(mParams);//这个ImageView放到ListView的第2列之后((LinearLayout)convertView).addView(viewHolder.imageView,2);convertView.setTag(viewHolder);}else{viewHolder = (ViewHolder)convertView.getTag();Log.d("MyBaseAdapter", "旧的convertView,position="+position);}viewHolder.textViewItem01.setText(String.valueOf(person.id));viewHolder.textViewItem02.setText(person.name);viewHolder.textViewItem03.setText(person.address);viewHolder.imageView.setImageResource(person.photo);//对ListView中第1个TextView配置OnClick事件viewHolder.textViewItem01.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v) {Toast.makeText(context, "[textViewItem01.setOnClickListener]点击了"+person.name, Toast.LENGTH_SHORT).show();}});//对ListView中的每一行信息配置OnClick事件convertView.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v) {Toast.makeText(context, "[convertView.setOnClickListener]点击了"+person.name, Toast.LENGTH_SHORT).show();}});//对ListView中的每一行信息配置OnLongClick事件convertView.setOnLongClickListener(new OnLongClickListener(){@Overridepublic boolean onLongClick(View v) {Toast.makeText(context, "[convertView.setOnLongClickListener]点击了"+person.name, Toast.LENGTH_SHORT).show();return true;}});return convertView;}}

MenuEntity类代码：

package com.zhouzijing.android.util;/*** 定义菜单实体结构.* @author stephen**/public class MenuEntity{/*** 生成菜单.* @param groupId* @param itemId* @param order* @param title*/public MenuEntity(int groupId, int itemId, int order, CharSequence title) {super();this.groupId = groupId;this.itemId = itemId;this.order = order;this.title = title;}/*** 组.*/private int groupId;/*** 菜单编号.*/private int itemId;/*** 显示顺序号.*/private int order;/*** 菜单显示名称.*/private CharSequence title;/*** @return the groupId*/public int getGroupId() {return groupId;}/*** @param groupId the groupId to set*/public void setGroupId(int groupId) {this.groupId = groupId;}/*** @return the itemId*/public int getItemId() {return itemId;}/*** @param itemId the itemId to set*/public void setItemId(int itemId) {this.itemId = itemId;}/*** @return the order*/public int getOrder() {return order;}/*** @param order the order to set*/public void setOrder(int order) {this.order = order;}/*** @return the title*/public CharSequence getTitle() {return title;}/*** @param title the title to set*/public void setTitle(CharSequence title) {this.title = title;}}