listview中的EditText重复值
EditText in listview repeats the value
我在列表中有三个文本视图和一个编辑文本。当我在 edittext 中输入任何值时,相同的值也会复制到另一个 edittext 中。我厌倦了同时使用 onFocusChangedListener 和 onTextChanged 来实现,但是这两种情况下的问题都是一样的。
public class ProductListAdapter extends BaseAdapter {
Context context;
public ArrayList<Products> prodList;
private static LayoutInflater inflater = null;
public ProductsList productListActivity;
public ProductListAdapter(Context context,ArrayList<Products> prodList) {
this.context = context;
this.prodList = prodList;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Log.e("In adapter", "yes");
}
@Override
public int getCount() {
return prodList.size();
}
@Override
public Products getItem(int position) {
return prodList.get(position); }
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView( final int position, View convertView, ViewGroup parent) {
Log.i(" in prodlist adapter","View holder");
final ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.productslistviewadapter, parent, false);
holder = new ViewHolder();
holder.tvdrCode = (TextView) convertView.findViewById(R.id.tvname);
holder.tvDrName = (TextView) convertView.findViewById(R.id.tvprodpack);
holder.tvterrcode= (TextView) convertView.findViewById(R.id.textView3);
holder.caption = (EditText)convertView.findViewById(R.id.editText1);
convertView.setTag(holder);
}
else {
holder = (ViewHolder) convertView.getTag();
}
Products p = prodList.get(position);
holder.tvdrCode.setText(p.getDocCode());
holder.tvDrName.setText(p.getDocName());
holder.tvterrcode.setText(p.getAdr());
//holder.caption.setText(prodList.get(position).caption);
/* holder.caption.setId(position);
holder.caption.setOnFocusChangeListener(new View.OnFocusChangeListener() {
public void onFocusChange(View v, boolean hasFocus) {
if (!hasFocus) {
final int position = v.getId();
final EditText Caption = (EditText) v;
// prodList.get(position)= Caption.getText().toString();
String d = prodList.get(position).getDocCode();
Log.e("dr code",d);
}
}
}); */
holder.caption.setTag(position);
// holder.caption.setText(ProdList.get(position).toString());
int tag_position=(Integer) holder.caption.getTag();
holder.caption.setId(tag_position);
holder.caption.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start,int before, int count) {
//2nd method String d = planArraylist.get(position).getDocCode();
final int position2 = holder.caption.getId();
final EditText Caption = (EditText) holder.caption;
if(Caption.getText().toString().length()>0){
String d = prodList.get(position2).getDocCode();
Log.e("dr code",d);
}
}
@Override
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
return convertView;
}
static class ViewHolder {
TextView tvdrCode;
TextView tvDrName;
TextView tvterrcode;
EditText caption;
}
}
xml代码
<?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="match_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animationCache="false"
android:scrollingCache="false"
android:smoothScrollbar="true" >
<!-- android:descendantFocusability="beforeDescendants" -->
</ListView>
正如我们所知,当我们滚动整个列表时,ListView 会重用 ListItem 的视图。
因此,当我们有一个带有 EditText 的自定义 ListView 时,如果我们在第一个 EditText 中输入任何值并开始滚动,那么当我们滚动 listview 时,一个 EditText 的值将一个一个地复制到另一个 EditText。
这发生在列表视图重用该视图和另一个视图中的另一个列表项时,即未看到的视图向上滚动它重用旧列表视图,因此在新编辑文本中可以看到该视图的旧值.
http://www.webplusandroid.com/creating-listview-with-edittext-and-textwatcher-in-android/
添加到下面的答案中,您应该始终使用 if else 条件将值放入 getView(..) 方法中,如果没有将 put empty space 放在 else 条件下,我也遇到了同样的问题。
这是一个很好的教程,解决了我的问题:
http://www.webplusandroid.com/creating-listview-with-edittext-and-textwatcher-in-android/
关键是:
@Override
public View getView(int position, View convertView, ViewGroup parent) {
//ViewHolder holder = null;
final ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
LayoutInflater inflater = ListviewActivity.this.getLayoutInflater();
convertView = inflater.inflate(R.layout.lyt_listview_list, null);
holder.textView1 = (TextView) convertView.findViewById(R.id.textView1);
holder.editText1 = (EditText) convertView.findViewById(R.id.editText1);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.ref = position;
holder.textView1.setText(arrText[position]);
holder.editText1.setText(arrTemp[position]);
holder.editText1.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
}
@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
arrTemp[holder.ref] = arg0.toString();
}
});
return convertView;
}
private class ViewHolder {
TextView textView1;
EditText editText1;
int ref;
}
我在列表中有三个文本视图和一个编辑文本。当我在 edittext 中输入任何值时,相同的值也会复制到另一个 edittext 中。我厌倦了同时使用 onFocusChangedListener 和 onTextChanged 来实现,但是这两种情况下的问题都是一样的。
public class ProductListAdapter extends BaseAdapter {
Context context;
public ArrayList<Products> prodList;
private static LayoutInflater inflater = null;
public ProductsList productListActivity;
public ProductListAdapter(Context context,ArrayList<Products> prodList) {
this.context = context;
this.prodList = prodList;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Log.e("In adapter", "yes");
}
@Override
public int getCount() {
return prodList.size();
}
@Override
public Products getItem(int position) {
return prodList.get(position); }
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView( final int position, View convertView, ViewGroup parent) {
Log.i(" in prodlist adapter","View holder");
final ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.productslistviewadapter, parent, false);
holder = new ViewHolder();
holder.tvdrCode = (TextView) convertView.findViewById(R.id.tvname);
holder.tvDrName = (TextView) convertView.findViewById(R.id.tvprodpack);
holder.tvterrcode= (TextView) convertView.findViewById(R.id.textView3);
holder.caption = (EditText)convertView.findViewById(R.id.editText1);
convertView.setTag(holder);
}
else {
holder = (ViewHolder) convertView.getTag();
}
Products p = prodList.get(position);
holder.tvdrCode.setText(p.getDocCode());
holder.tvDrName.setText(p.getDocName());
holder.tvterrcode.setText(p.getAdr());
//holder.caption.setText(prodList.get(position).caption);
/* holder.caption.setId(position);
holder.caption.setOnFocusChangeListener(new View.OnFocusChangeListener() {
public void onFocusChange(View v, boolean hasFocus) {
if (!hasFocus) {
final int position = v.getId();
final EditText Caption = (EditText) v;
// prodList.get(position)= Caption.getText().toString();
String d = prodList.get(position).getDocCode();
Log.e("dr code",d);
}
}
}); */
holder.caption.setTag(position);
// holder.caption.setText(ProdList.get(position).toString());
int tag_position=(Integer) holder.caption.getTag();
holder.caption.setId(tag_position);
holder.caption.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start,int before, int count) {
//2nd method String d = planArraylist.get(position).getDocCode();
final int position2 = holder.caption.getId();
final EditText Caption = (EditText) holder.caption;
if(Caption.getText().toString().length()>0){
String d = prodList.get(position2).getDocCode();
Log.e("dr code",d);
}
}
@Override
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
return convertView;
}
static class ViewHolder {
TextView tvdrCode;
TextView tvDrName;
TextView tvterrcode;
EditText caption;
}
}
xml代码
<?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="match_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animationCache="false"
android:scrollingCache="false"
android:smoothScrollbar="true" >
<!-- android:descendantFocusability="beforeDescendants" -->
</ListView>
正如我们所知,当我们滚动整个列表时,ListView 会重用 ListItem 的视图。
因此,当我们有一个带有 EditText 的自定义 ListView 时,如果我们在第一个 EditText 中输入任何值并开始滚动,那么当我们滚动 listview 时,一个 EditText 的值将一个一个地复制到另一个 EditText。
这发生在列表视图重用该视图和另一个视图中的另一个列表项时,即未看到的视图向上滚动它重用旧列表视图,因此在新编辑文本中可以看到该视图的旧值.
http://www.webplusandroid.com/creating-listview-with-edittext-and-textwatcher-in-android/
添加到下面的答案中,您应该始终使用 if else 条件将值放入 getView(..) 方法中,如果没有将 put empty space 放在 else 条件下,我也遇到了同样的问题。
这是一个很好的教程,解决了我的问题:
http://www.webplusandroid.com/creating-listview-with-edittext-and-textwatcher-in-android/
关键是:
@Override
public View getView(int position, View convertView, ViewGroup parent) {
//ViewHolder holder = null;
final ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
LayoutInflater inflater = ListviewActivity.this.getLayoutInflater();
convertView = inflater.inflate(R.layout.lyt_listview_list, null);
holder.textView1 = (TextView) convertView.findViewById(R.id.textView1);
holder.editText1 = (EditText) convertView.findViewById(R.id.editText1);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.ref = position;
holder.textView1.setText(arrText[position]);
holder.editText1.setText(arrTemp[position]);
holder.editText1.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
}
@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
arrTemp[holder.ref] = arg0.toString();
}
});
return convertView;
}
private class ViewHolder {
TextView textView1;
EditText editText1;
int ref;
}