我不是android listview和Edittext的专家。但是，我遇到了一些关于这个问题的烦人问题。我在 listview 中获取值没有任何问题但是当我在 Edittext 中输入内容并向下滚动 EditText 的值时会更改它的位置。这是我的代码。 //产品类
public class products {
public String prod_sl;
public String prod_code;
public String product_name;
public String product_desc;
public String prod_qnty;
public String prod_uom;
public String prod_price;
boolean ShowName;
public products(String psl, String pcode,String Name, String Desc, String UOM) {
this.prod_sl = psl;
prod_code = pcode;
prod_qnty="";
prod_price ="";
product_name=Name;
product_desc=Desc;
prod_uom =UOM;
}
/* public boolean isShowName() {
return ShowName;
}
public void setShowName(boolean showName) {
ShowName = showName;
}*/
//sl
public String getSl() { return prod_sl; }
public void setSl(String psl) { this.prod_sl = psl; }
//product code
public String getCode() { return prod_code; }
public void setCode(String pcode) { this.prod_code = pcode; }
//product Name
public String getName() { return product_name; }
public void setName(String product_name) { this.product_name = product_name; }
//product desc
public String getDesc() { return product_desc; }
public void setDesc(String product_desc) { this.product_desc = product_desc; }
//product UOM
public String getUom() { return prod_uom; }
public void setUom(String prod_uom) { this.prod_uom = prod_uom; }
// product quantity
public String getQnty() {
return prod_qnty; }
public void setQnty(String prod_qnty) {
this.prod_qnty = prod_qnty; }
//product price
public String getPrice() {
return prod_price; }
public void setPrice(String prod_price) {
this.prod_price = prod_price; }
}
这是适配器类
public class ListViewAdapter extends ArrayAdapter<products> {
Context mContext;
View v;
private String[] arrTemp;
LayoutInflater inflater;
ArrayList<products> arrayproducts;
public String[] scoresToUpdate=new String[1000];
//public String Array scoresToUpdate =scoresToUpdate[];
public static EditText edit_qnty,prod_price;
public static HashMap<Integer,String> myList=new HashMap<Integer,String>();
public ListViewAdapter(Context context, int resource, ArrayList<products> arrayproducts) {
super(context, resource);
this.mContext = context;
this.arrayproducts = arrayproducts;
this.inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
try {
final int pos=position;
final ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.list_adapter_view, null);
holder = new ViewHolder();
holder.prod_sl = (TextView) convertView.findViewById(R.id.prod_sl);
holder.prod_code = (TextView) convertView.findViewById(R.id.prod_code);
holder.txtTitle = (TextView) convertView.findViewById(R.id.adapter_text_title);
holder.txtDescription = (TextView) convertView.findViewById(R.id.adapter_text_description);
holder.prod_uom = (TextView) convertView.findViewById(R.id.prod_uom);
holder.prod_qnty = (EditText) convertView.findViewById(R.id.prod_qnty);
holder.prod_price = (EditText) convertView.findViewById(R.id.prod_price);
// edit_qnty = (EditText) convertView.findViewById(R.id.prod_qnty);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
// holder.prod_qnty.setText(scoresToUpdate[pos]);
}
holder.ref = position;
products prod = arrayproducts.get(position);
holder.prod_sl.setText("" + position);
holder.prod_code.setText(prod.getCode());
holder.txtTitle.setText(prod.getName());
holder.txtDescription.setText(prod.getDesc());
holder.prod_uom.setText(prod.getUom());
Log.e("row values",""+position+"\t-"+prod.getCode()+""+prod.getName()+""+prod.getDesc()+""+prod.getUom());
// holder.prod_qnty.setText(arrTemp[position]);
holder.prod_qnty.setText(scoresToUpdate[position]);
holder.prod_qnty.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
arrayproducts.get(pos).setQnty(holder.prod_qnty.getText().toString().trim());
myList.put(pos,arg0.toString().trim());
if (!arg0.equals("0")){
scoresToUpdate[pos] = arg0.toString();
Log.e("On text Change","Pos"+pos+"\tqnty:"+holder.prod_qnty.getText().toString().trim()+"\t Args: "+arg0.toString());
}
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
Log.e("After Text change","Pos"+holder.ref+"\tqnty:"+holder.prod_qnty.getText().toString().trim());
// arrTemp[holder.ref] = arg0.toString();
}
});
//holder.prod_qnty.setText(myList.get(position));
holder.prod_qnty.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
Log.e("Current Qnty",edit_qnty.getText().toString().trim());
if(holder.prod_qnty.getText().toString().trim().equals("0")){
holder.prod_qnty.setText("");
}
String inttext = (""+holder.prod_qnty.getText().toString().trim());
if (!inttext.equals("0")){
holder.prod_price.setText("");
}
return false;
//return true;
}
});
//Using setOnclickListener not setOnCheckedChangeListener
//we need to update adapter once we finish with editing
/* holder.prod_qnty.setOnFocusChangeListener(new View.OnFocusChangeListener() {
public void onFocusChange(View v, boolean hasFocus) {
if (!hasFocus) {
final int pos = v.getId();
final EditText Qnty = (EditText) v;
Log.e("Qnty For the positon","POS: "+pos+"\tQnty: "+Qnty.getText().toString().trim());
arrayproducts.get(pos).setQnty(Qnty.getText().toString().trim());
//holder.prod_qnty.setText(Caption.getText().toString().trim());
}
}
});*/
/* holder.prod_price.setOnFocusChangeListener(new View.OnFocusChangeListener() {
public void onFocusChange(View v, boolean hasFocus) {
if (!hasFocus) {
final int position = v.getId();
final EditText Caption = (EditText) v;
arrayproducts.get(position).setPrice(Caption.getText().toString().trim());
}
}
});
*/
return convertView;
}
catch(Exception e){
Toast.makeText(mContext, "!!!", Toast.LENGTH_SHORT).show();
e.printStackTrace();
Log.e("Exception:",""+e.toString());
}
return convertView;
}
/* @Override
public int getCount() {
return arrayproducts.size();
}*/
@Override
public int getCount() {
// TODO Auto-generated method stub
if(arrayproducts != null && arrayproducts.size() != 0){
return arrayproducts.size();
}
return 0;
}
/*@Override
public Objects getItem(int position) {
// TODO Auto-generated method stub
return arrayproducts[position];
}*/
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public void getQnty(){
if(edit_qnty.getText().toString().trim().equals("0"))
edit_qnty.setText("");
}
static class ViewHolder {
TextView prod_sl;
TextView prod_code;
TextView txtTitle;
TextView txtDescription;
TextView prod_uom;
EditText prod_qnty,prod_price;
TextWatcher qtyWatcher;
TextWatcher priceWatcher;
int ref;
}
}
请帮助我，关心
答案 0 :(得分：1)
这对我有用！
if (holder.qtyWatcher != null) {
holder.txtFourth.removeTextChangedListener(holder.qtyWatcher);
}
// Create the TextWatcher corresponding to this row
holder.qtyWatcher = new TextWatcher() {
@Override
public void afterTextChanged(Editable s) {
if(s.toString().equals("")||s.toString().equals("0")){
arrayproducts.get(position).setQnty("0");
}
else{
arrayproducts.get(position).setQnty(s.toString());
}
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
};
答案 1 :(得分：0)
不确定listview和recycleview是否可以这样使用，因为当用户向下/向上滚动以查看更多数据时，它们涉及回收机制以重用已创建的视图并从数组或游标重新绑定数据。换句话说，创建的行视图数量有限，只能填满屏幕（两侧几乎没有额外），如果您为一个产品系列插入价格或数量，回收如何回收并重复使用以显示数据进程将重新绑定以显示您插入的相同数据或显示在相同位置，我怀疑这是可能的。
我建议您在父/子基础上重新构建您的应用程序。显示列表父数据，例如固定产品数据，当用户单击一个产品线时，另一个屏幕打开，以便用户插入新数据，例如该特定产品系列的价格，子屏幕的布局将包含编辑文本和任何其他数据输入视图，在这种情况下，您需要集成SQLite数据库，以便持久保存用户提供的新数据。
希望这可以为您提供一些有用的想法，帮助您实现目标。