- 一.tml代码
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="${relativePackage}.${activityClass}" > <ListView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/lv"> </ListView> </RelativeLayout>
二.条目代码
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="80dp">
<ImageView
android:id="@+id/img"
android:layout_width="75dp"
android:layout_height="75dp"
android:src="@drawable/ic_launcher"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textColor="#000"
android:id="@+id/text_name"
android:text="灰太狼"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000"
android:textSize="18sp"
android:text="价格:"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/text_price"
android:textColor="#000"
android:text="2200元"/>
</LinearLayout>
</LinearLayout>
</RelativeLayout>
三.弹窗输入框.xml
<?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="wrap_content"
android:orientation="vertical" >
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/ed_upd"
android:hint="请输入修改的价格"/>
</LinearLayout>
四.java代码
package com.example.list_upd;
public class Person {
private String name;
private int price;
public Person() {
// TODO Auto-generated constructor stub
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getPrice() {
return price;
}
public void setPrice(int price) {
this.price = price;
}
public Person(String name, int price) {
super();
this.name = name;
this.price = price;
}
}
package com.example.list_upd;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends Activity {
private List<Person> list;
private ListView lv;
private MainActivity.Madapter madapter;
private EditText ed_upd;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//获取控件
lv=(ListView) findViewById(R.id.lv);
//初始化数据
initData();
//自定义适配器
madapter=new Madapter();
//设置适配器
lv.setAdapter(madapter);
//条目点击事件,修改条目中的内容
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
final int position, long id) {
//获取AlertDialog中输入框的视图
View inflate = View.inflate(MainActivity.this,R.layout.ed_view, null);
//获取AlertDialog中输入框的控件
ed_upd = (EditText) inflate.findViewById(R.id.ed_upd);
AlertDialog alertDialog=new AlertDialog.Builder(MainActivity.this)
//头部
.setTitle("调整商品价格")
//内容,获取的是条目的name值
.setMessage(list.get(position).getName())
//输入框
.setView(inflate)
//确定事件
.setPositiveButton("确定", new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
//ed_upd.getText().toString()获取输入框的值
//Integer.parseInt() 把String类型强转成int类型
//list.get(position).setPrice()获取点击条目的list值,修改price的内容
list.get(position).setPrice(Integer.parseInt(ed_upd.getText().toString()));
//刷新适配器
madapter.notifyDataSetChanged();
}
})
.create();
alertDialog.show();
}
});
}
private void initData() {
list=new ArrayList<Person>();
for (int i = 0; i <20; i++) {
list.add(new Person("喜羊羊与灰太狼",2200));
}
}
public class Madapter extends BaseAdapter{
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// 优化
ViewHolder holder;
if (convertView==null) {
holder=new ViewHolder();
//获取条目布局
convertView=View.inflate(MainActivity.this,R.layout.wang, null);
//复用控件
holder.name=(TextView) convertView.findViewById(R.id.text_name);
holder.price=(TextView) convertView.findViewById(R.id.text_price);
//绑定
convertView.setTag(holder);
} else {
holder=(ViewHolder) convertView.getTag();
}
//给复用控件设置值
holder.name.setText(list.get(position).getName());
holder.price.setText(list.get(position).getPrice()+"");
return convertView;
}
}
class ViewHolder{
TextView name;
TextView price;
}
}