购物车listview加减按钮监听
问题描述：
android关于购物车listview加减按钮监听
我用vieholder按完加减跟新完数据后 更新数据是对的 但是跟新的itme不对 我刚觉viewholder记不住position的原因
想不用viewholder 但是太卡 我该怎么做 我是学渣一枚 求大神指导 程序都改蒙了 有不规范的 求大神指出来
@Override
public View getView(int position,View convertView, ViewGroup parent) {
data=mlist.get(position);
Log.i("wu", ""+position);
//重新创建view 不做优化
// View view=minflater.inflate(R.layout.buycar_thing_list,null);
// ImageView buycar_image=(ImageView)view.findViewById(R.id.buycar_thingimage);
// TextView thingname=(TextView) view.findViewById(R.id.buycar_thingname);
// TextView thingvalue=(TextView) view.findViewById(R.id.bugcar_thingvalue);
// TextView num=(TextView) view.findViewById(R.id.bugcar_thingnumber);
// ImageView image_change=(ImageView) view.findViewById(R.id.buycar_sth_change);
// ImageView image_reduce=(ImageView) view.findViewById(R.id.buycar_reduce);
// TextView value_xiaoji=(TextView) view.findViewById(R.id.bugcar_thingvalue_two);
// ImageView image_add=(ImageView)view.findViewById(R.id.buycar_add);
// buycar_image.setImageResource(data.ImageResId);
// thingname.setText(data.thingbuycar_name);
// thingvalue.setText(data.thingbuycar_value);
// buycar_image.setBackgroundResource(data.ImageResId);
// thingname.setText(data.thingbuycar_name);
// thingvalue.setText(data.thingbuycar_value);
// num.setText(data.thingbuycar_num);
// //选择判断
// if(data.thingbuycar_or){
// image_change.setImageResource(R.drawable.pay_and_delivery_unchecked);
// value_xiaoji.setText("0.00");
// }else{
// double d_value=Double.parseDouble(data.thingbuycar_value);
// double d_num=Double.parseDouble(data.thingbuycar_num);
// double d_xiaoji=d_value*d_num/1.00;
// DecimalFormat df = new DecimalFormat("0.00");
// String s=df.format(d_xiaoji);
// value_xiaoji.setText(s);
// }
// if(data.thingbuycar_num!="1"){
// image_reduce.setImageResource(R.drawable.shopping_cart_product_num_reduce);
// }
// MyListener mylistener_add=new MyListener(position,1);
// MyListener mylistener_reduce=new MyListener(position,2);
// MyListener mylistener_change=new MyListener(position,3);
// image_add.setOnClickListener(mylistener_add);
// image_reduce.setOnClickListener(mylistener_reduce);
// image_change.setOnClickListener(mylistener_change);
// return view;
MyListener mylistener_add=new MyListener(position,1);
MyListener mylistener_reduce=new MyListener(position,2);
MyListener mylistener_change=new MyListener(position,3);
if(convertView==null){
viewHolder=new viewHolder();
vae=convertView=minflater.inflate(R.layout.buycar_thing_list, null);
viewHolder.image=(ImageView) convertView.findViewById(R.id.buycar_thingimage);
viewHolder.name=(TextView) convertView.findViewById(R.id.buycar_thingname);
viewHolder.value=(TextView) convertView.findViewById(R.id.bugcar_thingvalue);
viewHolder.num=(TextView) convertView.findViewById(R.id.bugcar_thingnumber);
viewHolder.image_change=(ImageView) convertView.findViewById(R.id.buycar_sth_change);
viewHolder.image_reduce=(ImageView) convertView.findViewById(R.id.buycar_reduce);
viewHolder.value_xiaoji=(TextView) convertView.findViewById(R.id.bugcar_thingvalue_two);
viewHolder.image_add=(ImageView)convertView.findViewById(R.id.buycar_add);
convertView.setTag(viewHolder);
}else{
viewHolder=(viewHolder) convertView.getTag();
}
viewHolder.image.setBackgroundResource(data.ImageResId);
viewHolder.name.setText(data.thingbuycar_name);
viewHolder.value.setText(data.thingbuycar_value);
viewHolder.num.setText(data.thingbuycar_num);
Log.i("wu", "我就不信了"+position);
//选择判断
if(data.thingbuycar_or){
viewHolder.image_change.setImageResource(R.drawable.pay_and_delivery_unchecked);
viewHolder.value_xiaoji.setText("0.00");
}else{
double d_value=Double.parseDouble(data.thingbuycar_value);
double d_num=Double.parseDouble(data.thingbuycar_num);
double d_xiaoji=d_value*d_num/1.00;
DecimalFormat df = new DecimalFormat("0.00");
String s=df.format(d_xiaoji);
viewHolder.value_xiaoji.setText(s);
// System.out.println(d_num+" "+d_value+" "+d_xiaoji);
// String s=String.valueOf(d_xiaoji);
// System.out.println(s);
}
if(data.thingbuycar_num!="1"){
viewHolder.image_reduce.setImageResource(R.drawable.shopping_cart_product_num_reduce);
}
viewHolder.image_add.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
viewHolder.image_reduce.setImageResource(R.drawable.shopping_cart_product_num_reduce);
// double d_value=Double.parseDouble(data.thingbuycar_value);
// double d_num=Double.parseDouble(data.thingbuycar_num);
// double d_xiaoji=d_value*d_num/1.00;
// DecimalFormat df = new DecimalFormat("0.00");
// String s=df.format(d_xiaoji);
viewHolder.value_xiaoji.setText("5");
}});
viewHolder.image_reduce.setOnClickListener(mylistener_reduce);
viewHolder.image_change.setOnClickListener(mylistener_change);
return convertView;
}
private class viewHolder{
private ImageView image;
private TextView name;
private TextView value;
private TextView num;
private TextView value_xiaoji;
private ImageView image_change;
private ImageView image_reduce;
private ImageView image_add;
}
private class MyListener implements OnClickListener{
int mposition;
int change;
public MyListener(int mposition,int change){
this.mposition=mposition;
this.change=change;
}
public void updata_xiaoji(int mposition){
viewHolder.value_xiaoji.setTag(mposition);
Log.i("wu", "真的"+viewHolder.value_xiaoji.getTag());
double d_value=Double.parseDouble(mlist.get(mposition).thingbuycar_value);
double d_num=Double.parseDouble(mlist.get(mposition).thingbuycar_num);
double d_xiaoji=d_value*d_num/1.00;
DecimalFormat df = new DecimalFormat("0.00");
String s=df.format(d_xiaoji);
viewHolder.value_xiaoji.setText(s);
}
@Override
public void onClick(View v) {
String Snum=null;
int mnumber=(int)Double.parseDouble(mlist.get(mposition).thingbuycar_num);
switch (change) {
//加
case 1:
viewHolder.image_add.setTag(mposition);
viewHolder.image_change.setTag(mposition);
viewHolder.image_reduce.setTag(mposition);
viewHolder.image_reduce.setImageResource(R.drawable.shopping_cart_product_num_reduce);
mnumber++;
Snum=""+mnumber;
mlist.get(mposition).thingbuycar_num=Snum;
viewHolder.num.setText(Snum);
Log.i("wu", ""+viewHolder.image_add.getTag());
updata_xiaoji(mposition);
Log.i("wu", ""+mposition);
break;
case 2:
//减法
viewHolder.image_add.setTag(mposition);
viewHolder.image_change.setTag(mposition);
viewHolder.image_reduce.setTag(mposition);
if(mnumber>1){
mnumber--;
if(mnumber==1){
viewHolder.image_reduce.setImageResource(R.drawable.shopping_cart_product_num_reduce_disable);
}
Snum=""+mnumber;
mlist.get(mposition).thingbuycar_num=Snum;
viewHolder.num.setText(Snum);
}
updata_xiaoji(mposition);
Log.i("wu", ""+mposition);
break;
case 3:
//默认false 小计
viewHolder.image_add.setTag(mposition);
viewHolder.image_change.setTag(mposition);
viewHolder.image_reduce.setTag(mposition);
if(mlist.get(mposition).thingbuycar_or){
viewHolder.image_change.setImageResource(R.drawable.pay_and_delivery_fast_checked);
updata_xiaoji(mposition);
mlist.get(mposition).thingbuycar_or=false;
}else{
viewHolder.image_change.setImageResource(R.drawable.pay_and_delivery_unchecked);
viewHolder.value_xiaoji.setText("0.00");
mlist.get(mposition).thingbuycar_or=true;
}
break;
}
}
}
}
答
我以前项目里的，借你参考一下，不难的
public class ShopItemAdapter extends BaseAdapter{
private Context context; //运行上下文
private List<Map<String, Object>> listItems; ///商品信息集合
private LayoutInflater listContainer; //视图容器
private Integer []num;
private Handler mHandler;
public final class ListItemView{ //自定义控件集合
public ImageView product;
public TextView pro_name;
public TextView shelves_date;
public TextView make_date;
public TextView use_date;
public TextView new_price;
public TextView old_price;
public TextView reduce;
public TextView num;
public TextView add;
public TextView delete;
}
private ListItemView listItemView;
public ShopItemAdapter(Context context,
List<Map<String, Object>> listItems, Integer[] from,
Handler mHandler) {
// TODO Auto-generated constructor stub
this.context = context;
listContainer = (LayoutInflater)context.getSystemService(
Context.LAYOUT_INFLATER_SERVICE);
this.listItems = listItems;
this.num = new Integer[from.length];
System.arraycopy(from, 0, num, 0, from.length);
this.mHandler = mHandler;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return listItems.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return listItems.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
/**
* ListView Item设置
*/
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
Log.e("method", "getView");
final int selectID = position;
//自定义视图
if (convertView == null) {
listItemView = new ListItemView();
//获取list_item布局文件的视图
convertView = listContainer.inflate(R.layout.item, null);
//获取控件对象
listItemView.product = (ImageView)convertView.findViewById(R.id.pro_pic);
listItemView.pro_name = (TextView)convertView.findViewById(R.id.pro_name);
listItemView.shelves_date = (TextView)convertView.findViewById(R.id.shelves_date);
listItemView.make_date = (TextView)convertView.findViewById(R.id.make_date);
listItemView.use_date = (TextView)convertView.findViewById(R.id.use_date);
listItemView.new_price = (TextView)convertView.findViewById(R.id.new_price);
listItemView.old_price = (TextView)convertView.findViewById(R.id.old_price);
listItemView.reduce = (TextView)convertView.findViewById(R.id.reduce);
listItemView.num = (TextView)convertView.findViewById(R.id.num);
listItemView.add = (TextView)convertView.findViewById(R.id.add);
listItemView.delete = (TextView)convertView.findViewById(R.id.delete);
listItemView.reduce.setOnClickListener(new lvButtonListener(position));
listItemView.add.setOnClickListener(new lvButtonListener(position));
listItemView.delete.setOnClickListener(new lvButtonListener(position));
//设置控件集到convertView
convertView.setTag(listItemView);
}
else {
listItemView = (ListItemView)convertView.getTag();
}
//设置文字和图片
listItemView.pro_name.setText((String) listItems.get(position)
.get("info"));
listItemView.shelves_date.setText((String) listItems.get(position)
.get("saleTime"));
listItemView.make_date.setText((String) listItems.get(position)
.get("produceTime"));
listItemView.use_date.setText((String) listItems.get(position)
.get("durabilityPeriod"));
listItemView.use_date.setText((String) listItems.get(position)
.get("durabilityPeriod"));
listItemView.num.setText(String.valueOf(listItems.get(position)
.get("num")));
listItemView.new_price.setText("￥"+String.valueOf(listItems.get(position)
.get("new_price")));
listItemView.old_price.setText("￥"+String.valueOf(listItems.get(position)
.get("old_price")));
listItemView.old_price.getPaint().setFlags(Paint. STRIKE_THRU_TEXT_FLAG);
return convertView;
}
public void addNum(int position){
int num=(Integer) listItems.get(position).get("num");
num++;
listItems.get(position).put("num",num);
mHandler.sendMessage(mHandler.obtainMessage(1, getTotalPrice()));
this.notifyDataSetChanged();
}
public void cutNum(int position){
int num = (Integer) listItems.get(position).get("num");
if(num>0){
num--;
}
//将数据源中改变后的数据重新放进数据源中，再加载到item中
listItems.get(position).put("num",num);
mHandler.sendMessage(mHandler.obtainMessage(1, getTotalPrice()));
//重新刷新页面
this.notifyDataSetChanged();
}
public void deletItem(int position){
listItems.remove(position);
mHandler.sendMessage(mHandler.obtainMessage(1, getTotalPrice()));
//重新刷新页面
this.notifyDataSetChanged();
}
/**
* 计算选中商品的金额
* @return 返回需要付费的总金额
*/
private Integer getTotalPrice(){
Integer totalPrice = 0;
for(int i=0;i<listItems.size();i++){
int num = (Integer) listItems.get(i).get("num");
int price = (Integer) listItems.get(i).get("new_price");
totalPrice += num * price;
}
return totalPrice;
}
//按钮监听事件，实现view中的监听事件
class lvButtonListener implements View.OnClickListener{
private int position;
lvButtonListener(int pos){
position = pos;
}
@Override
public void onClick(View v){
int vid = v.getId();
if(vid == listItemView.add.getId()){
addNum(position);
}
else if(vid == listItemView.reduce.getId()){
cutNum(position);
}
else if(vid == listItemView.delete.getId()){
deletItem(position);
}
}
}
}
答
if(data.thingbuycar_num!="1"){
viewHolder.image_reduce.setImageResource(R.drawable.shopping_cart_product_num_reduce);
}
把else加上，使用holder之后，带状态的都需要成对出现，不能只出现if.