问题
I have a RecyclerView and each row has a EditText also. I am adding item to RecyclerView by searching them and then I type the quantity in the edit text. Then I send it to the server to store using json format. Item add is working perfectly. There is no edit text value swapping problem also when scrolling. I can display 5 rows in the screen.
Problem is when I send item to the server, edit text values in bottom rows get the same after 5th row.
These are the rows I am adding to the recyclerview.Printed List that send to the server.
Item : 7.50-15 10PR FM CEAT Quantity : 1
Item : 5.60-15 04PR K 511 CEAT Quantity : 2
Item : 2.75-18 04PR SECURA F85 CEAT (F) Quantity : 3
Item : 3.00-17 06PR SECURA ZOOM CEAT (R) Quantity : 4
Item : 6.50-14 10PR FM CEAT Quantity : 5
Item : 5.00-12 04PR GRIP MASTER CEAT Quantity : 5
Item : 4.00-08 06PR AUTO RAJA RPG Quantity : 5
Item : 9.00-20 14PR CEAT CLT LUG Quantity : 5
Item : 8.25-20 14PR TR PLUS SUNTRAC Quantity : 5
Item : 7.00-15 12PR FM CEAT Quantity : 5
After the 5th position Quantity is the same. My input value is not coming.
This is my SelectItem class -
public class SelectItem extends AppCompatActivity implements SelectItemAdapter.OnItemClickListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.select_item);
vollySingleton = VollySingleton.getsInstance();
requestQueue = vollySingleton.getmRequestQueue();
toolbar = (Toolbar) findViewById(R.id.app_bar);
setSupportActionBar(toolbar);
getSupportActionBar().setHomeButtonEnabled(false);
getSupportActionBar().setDisplayHomeAsUpEnabled(false);
myRecyclerView = (RecyclerView) findViewById(R.id.selectedItemRecyclerView);
linearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
spinner = (Spinner) findViewById(R.id.selectDistribChannel);
arrayAdapter = new ArrayAdapter<String>(this, R.layout.spinner_item, YourDealerListFragment.disChannel);
arrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(arrayAdapter);
selectedDisChannel = spinner.getSelectedItem().toString();
sqLiteHandler = new SQLiteHandler(getApplicationContext());
myRecyclerViewAdapter = new SelectItemAdapter(this);
myRecyclerViewAdapter.setOnItemClickListener(this);
myRecyclerView.setAdapter(myRecyclerViewAdapter);
myRecyclerView.setLayoutManager(linearLayoutManager);
myRecyclerViewAdapter.notifyDataSetChanged();
dealerName = DealerListAdapter.getDealerName();
dealerID = DealerListAdapter.getDealerID();
repID = DealerListAdapter.getRepID();
//order number
orderId = "70000001";
if (newOrderId == null) {
newOrderId = orderId;
}
bAdd = (Button) findViewById(R.id.bAdd);
bAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (myRecyclerViewAdapter.getItemCount() != 0) {
new AlertDialog.Builder(SelectItem.this)
.setTitle("Confirmation")
.setMessage("Do you want to send?")
.setIcon(android.R.drawable.ic_dialog_alert)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
checkOrderNo();
}
})
.setNegativeButton(android.R.string.no, null).show();
} else {
Toast.makeText(getApplicationContext(), "Empty List", Toast.LENGTH_SHORT).show();
}
}
});
//textView.setText(dealerName);
getSupportActionBar().setTitle(dealerName);
final AutoCompleteTextView acTextView = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView);
adapter = new MaterialSuggestionAdapter(getApplicationContext());
acTextView.setAdapter(adapter);
acTextView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Product result = adapter.getItem(position);
String newName = result.getMatName().toString();
String newQty = String.valueOf(result.getMatQuantity());
String newPCode = result.getMatNo().toString();
String newPlant = result.getMatPlant().toString();
if (!newName.equals("")) {
if (myRecyclerViewAdapter.getItemCount() > 0) {
if (!isPresent(newPlant, newPCode, myRecyclerViewAdapter)) {
myRecyclerViewAdapter.add(1, newName, newQty, newPCode, newPlant);
} else {
Toast.makeText(getApplicationContext(), "Product Already in the List", Toast.LENGTH_SHORT).show();
}
} else {
myRecyclerViewAdapter.add(0, newName, newQty, newPCode, newPlant);
}
} else {
Toast.makeText(getApplicationContext(), "Invalied Item!", Toast.LENGTH_SHORT).show();
}
acTextView.setText("");
}
});
}
private boolean isPresent(String newPlant, String newPCode, SelectItemAdapter myRecyclerViewAdapter) {
boolean isPresent = false;
for (int i = 0; i < myRecyclerViewAdapter.getItemCount(); i++) {
if (newPCode.equalsIgnoreCase(myRecyclerViewAdapter.getItemPCode(i).toString()) && newPlant.equalsIgnoreCase(myRecyclerViewAdapter.getItemPlant(i).toString())) {
isPresent = true;
break;
}
}
return isPresent;
}
//send items for one order
private class SendItemAsync extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
}
@Override
protected Void doInBackground(Void... arg0) {
//Create JSON string start
json_string = "{\"sending_items\":[";
for (int i = 0; i < myRecyclerViewAdapter.getItemCount(); i++) {
/* if (myRecyclerView.findViewHolderForLayoutPosition(i) instanceof SelectItemAdapter.ItemHolder) {
SelectItemAdapter.ItemHolder childHolder = (SelectItemAdapter.ItemHolder) myRecyclerView.findViewHolderForLayoutPosition(i);
numberPickerNumber = childHolder.getQtyNumber();
}*/
getNumPicNumber(i);
//Repeat and loop this until all objects are added (and add try+catch)
try {
JSONObject obj_new = new JSONObject();
obj_new.put("order_no", orderIdForItemTable);
obj_new.put("items", myRecyclerViewAdapter.getItemName(i).toString());
obj_new.put("items_no", myRecyclerViewAdapter.getItemPCode(i).toString());
obj_new.put("plant", myRecyclerViewAdapter.getItemPlant(i).toString());
obj_new.put("quantity", numberPickerNumber);
json_string = json_string + obj_new.toString() + ",";
} catch (JSONException e) {
e.printStackTrace();
}
}
//Close JSON string
json_string = json_string.substring(0, json_string.length() - 1);
json_string += "]}";
HttpParams httpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParams, 3500);
HttpConnectionParams.setSoTimeout(httpParams, 1000);
HttpClient client = new DefaultHttpClient(httpParams);
String url = AppConfig.URL_ITEMS_SEND;
HttpPost request = new HttpPost(url);
try {
request.setEntity(new ByteArrayEntity(json_string.getBytes("UTF8")));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
request.setHeader("json", json_string);
request.setHeader("Accept", "application/json");
request.setHeader("Content-Type", "application/json");
Log.i("", "excuting request");
HttpResponse response = null;
try {
response = client.execute(request);
Log.d("HTTP Response", response.getStatusLine().toString());
try {
String responseBody = EntityUtils.toString(response.getEntity());
Log.d("Server Response", responseBody);
} catch (IOException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
finish();
Bundle basket = new Bundle();
basket.putString("dealerName", dealerName);
basket.putString("orderNo", newOrderId);
basket.putString("jsonString", json_string);
Intent intent = new Intent(SelectItem.this, ItemCart.class);
intent.putExtras(basket);
startActivity(intent);
finish();
//Toast.makeText(getApplicationContext(), json_string, Toast.LENGTH_LONG).show();
}
}
private String getNumPicNumber(int i) {
if (myRecyclerView.findViewHolderForLayoutPosition(i) instanceof SelectItemAdapter.ItemHolder) {
SelectItemAdapter.ItemHolder childHolder = (SelectItemAdapter.ItemHolder) myRecyclerView.findViewHolderForLayoutPosition(i);
numberPickerNumber = childHolder.getQtyNumber();
}
return numberPickerNumber;
}
@Override
public void onItemClick(SelectItemAdapter.ItemHolder item, int position) {
Toast.makeText(this,
"Remove " + position + " : " + item.getItemName(),
Toast.LENGTH_SHORT).show();
myRecyclerViewAdapter.remove(position);
}
private void checkOrderNo() {
showDialog();
DateFormat df = new SimpleDateFormat("yyyy/MM/dd hh:mm:ss");
final String nowDate = df.format(new Date());
//final day of the month
Date today = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTime(today);
calendar.add(Calendar.MONTH, 1);
calendar.set(Calendar.DAY_OF_MONTH, 1);
calendar.add(Calendar.DATE, -1);
Date lastDayOfMonth = calendar.getTime();
DateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
final String lastDate = sdf.format(lastDayOfMonth);
Log.d("Last day ", sdf.format(lastDayOfMonth) + " // Today" + nowDate);
// Tag used to cancel the insert
String tag_string_req = "req_insert";
final StringRequest strReq = new StringRequest(Request.Method.POST,
AppConfig.URL_ITEM_DETAILS_SEND, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
hideDialog();
try {
JSONObject jObj = new JSONObject(response);
if (jObj.names().get(0).equals("found")) {
newOrderId = jObj.getString("found").toString();
orderIdForItemTable = newOrderId;
new SendItemAsync().execute();
Log.d(TAG, "newOrderId: " + newOrderId);
Log.d(TAG, "New repID 2 inserted into sqlite: " + newOrderId + " " + nowDate);
sqLiteHandler.addItemDetails(newOrderId, repID, dealerID, nowDate, lastDate, selectedDisChannel);
} else {
Toast.makeText(getApplicationContext(), "Invalied Request", Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Inserting Error: " + error.getMessage());
Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
// Posting params to register url
Map<String, String> params = new HashMap<String, String>();
params.put("order_no", orderId);
params.put("repID", repID);
params.put("dealerID", dealerID);
params.put("nowDate", nowDate);
params.put("lastDate", lastDate);
params.put("disChannel", selectedDisChannel);
return params;
}
};
strReq.setRetryPolicy(new DefaultRetryPolicy(6000, 1,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
// Adding request to request queue
AppController.getInstance().addToRequestQueue(strReq, tag_string_req);
}
}
My Adapter class.
public class SelectItemAdapter extends RecyclerView.Adapter<SelectItemAdapter.ItemHolder> {
private List<String> itemsName, itemsQty, itemsPCode, itemPlant;
private OnItemClickListener onItemClickListener;
private LayoutInflater layoutInflater;
private RecyclerView myRecyclerview;
public SelectItemAdapter(Context context) {
layoutInflater = LayoutInflater.from(context);
itemsName = new ArrayList<String>();
itemsQty = new ArrayList<String>();
itemsPCode = new ArrayList<String>();
itemPlant = new ArrayList<String>();
}
@Override
public SelectItemAdapter.ItemHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = layoutInflater.inflate(R.layout.custom_row_selected_item, parent, false);
return new ItemHolder(itemView, this);
}
@Override
public void onBindViewHolder(SelectItemAdapter.ItemHolder holder, int position) {
holder.setItemName(itemsName.get(position));
holder.setItemQty(itemsQty.get(position));
holder.setItemPCode(itemsPCode.get(position));
holder.setItemPlant(itemPlant.get(position));
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public int getItemCount() {
return itemsName.size();
}
public Object getItemName(int position) {
return itemsName.get(position);
}
public Object getItemPCode(int position) {
return itemsPCode.get(position);
}
public Object getItemPlant(int position) {
return itemPlant.get(position);
}
public void setOnItemClickListener(OnItemClickListener listener) {
onItemClickListener = listener;
}
public OnItemClickListener getOnItemClickListener() {
return onItemClickListener;
}
public interface OnItemClickListener {
public void onItemClick(ItemHolder item, int position);
}
public void add(int location, String iName, String iQty, String iPCode, String iPlant) {
itemsName.add(location, iName);
itemsQty.add(location, iQty);
itemsPCode.add(location, iPCode);
itemPlant.add(location, iPlant);
notifyItemInserted(location);
}
public void remove(int location) {
if (location >= itemsName.size())
return;
itemsName.remove(location);
notifyItemRemoved(location);
}
public static class ItemHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private SelectItemAdapter parent;
TextView textItemName, txtPCode, txtAvailableQty, txtTempQty, txtPlant;
Button bRemove;
EditText numPicker;
public ItemHolder(View itemView, SelectItemAdapter parent) {
super(itemView);
this.parent = parent;
textItemName = (TextView) itemView.findViewById(R.id.txtProductName);
txtAvailableQty = (TextView) itemView.findViewById(R.id.txtAvailbleQty);
txtPCode = (TextView) itemView.findViewById(R.id.txtPCode);
txtPlant = (TextView) itemView.findViewById(R.id.txtPlant);
bRemove = (Button) itemView.findViewById(R.id.bRemove);
numPicker = (EditText) itemView.findViewById(R.id.numberPicker);
bRemove.setOnClickListener(this);
}
public void setItemName(CharSequence name) {
textItemName.setText(name);
}
public void setItemQty(CharSequence name) {
txtAvailableQty.setText(name);
}
public void setItemPCode(CharSequence name) {
txtPCode.setText(name);
}
public void setItemPlant(CharSequence name) {
txtPlant.setText(name);
}
public String getQtyNumber() {
return numPicker.getText().toString();
}
public CharSequence getItemName() {
return textItemName.getText();
}
public CharSequence getItemPCode() {
return txtPCode.getText();
}
@Override
public void onClick(View v) {
final OnItemClickListener listener = parent.getOnItemClickListener();
if (listener != null) {
listener.onItemClick(this, getPosition());
}
}
}
}
回答1:
RecyclerView creates only as many view holders as are needed to display the on-screen portion of the dynamic content, plus a few extra. As the user scrolls through the list, the RecyclerView takes the off-screen views and rebinds them to the data which is scrolling onto the screen
// Items for recycler View
//binding data
private ArrayList<Data> Items;
//HashMap to store editText text afterTextChanged
//each editext in RecyclerView contains Unique Key And Value
private HashMap<String,String> sourceData=new HashMap<>();
Refer This RecyclerView Program
public class DataRecyclerView extends RecyclerView.Adapter<DataRecyclerView.DataViewHolder> {
private Context context;
// Items for recycler View
//binding data
private ArrayList<Data> Items;
private LayoutInflater layoutInflater;
//HashMap to store editText text afterTextChanged
//each editext in RecyclerView contains Unique Key And Value
private HashMap<String,String> sourceData=new HashMap<>();
DataRecyclerView(Context context,ArrayList<Data> Items)
{
this.Items=Items;
this.context=context;
layoutInflater=LayoutInflater.from(context);
}
@NonNull
@Override
public DataViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
//DataBinding is used to bind Data
DataViewHolderBinding binding= DataBindingUtil.inflate(layoutInflater, R.layout.template,parent,false);
return new DataViewHolder(binding);
}
@Override
public void onBindViewHolder(@NonNull DataViewHolder holder, int position) {
//Pass Data pojo to Holder
holder.bindData(Items.get(position));
}
@Override
public int getItemCount() {
return Items.size();
}
class DataViewHolder extends RecyclerView.ViewHolder {
private EditText amount;
DataViewHolder(DataViewHolderBinding itemView) {
super(itemView.getRoot());
binding=itemView;
amount=binding.PayAmount;
}
void bindData(Data data)//Data pojo for DataBinding
{
if(binding!=null) {
// data will automatically set to textViews In DataBinding
binding.setData(data);
//every time data binds to views
//get text of respective edittext and assign to that current edittext
if (sourceData.containsKey((String.valueOf(getAdapterPosition())))) {// checks current editText key is availible or not
if (data.getIDNumber().equals(Items.get(getAdapterPosition()).getData.getIDNumber())) { //
amount.setText(sourceData.get((String.valueOf(getAdapterPosition()))).getAmount());
}else
{
if (data.getIDNumber().equals(Items.get(getAdapterPosition()).getData.getIDNumber())) { //
amount.setText(null);
}
amount.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
//when user enter text into edittext
//editetext key already availible in sourceData
// then update the value to hashmap sourceData
if (sourceData.containsKey(String.valueOf(getAdapterPosition()))) {
if (data.getIDNumber().equals(Items.get(getAdapterPosition()).getData.getIDNumber())) { //
if (!s.toString().trim().isEmpty()) {
if (!s.toString().trim().equals("0")) {
sourceData.put(String.valueOf(getAdapterPosition()),s.toString().trim());
} else {
sourceData.put(String.valueOf(getAdapterPosition()), s.toString().trim();
}
} else {
sourceData.put(String.valueOf(getAdapterPosition()),null );
}
}
}
else {
//when user enter text into edittext for the first time
//check for current Data pojo IDNumber with getAdapterPosition Items Data pojo IDNumber
//if it equal
//then we store text into hashmap for specific edittext by using adapterPosition as key
if (data.getIDNumber().equals(Items.get(getAdapterPosition()).getData.getIDNumber())) { //
if (!s.toString().trim().isEmpty()) {
if (!s.toString().trim().equals("0")) {
sourceData.put(String.valueOf(getAdapterPosition()),s.toString().trim());
} else {
sourceData.put(String.valueOf(getAdapterPosition()), s.toString().trim();
}
} else {
sourceData.put(String.valueOf(getAdapterPosition()),null );
}
}
}
}
});
}
}
}
}
### Image Reference I can't show proper Image but Its Look Like this
回答2:
The rows in RecyclerView is reusing while scrolling. So you need to create an array for save each EditText value
Then addTextChangedListener to your EditText to save the EditText value while you input
public void onBindViewHolder(SelectItemAdapter.ItemHolder holder, int position) {
...
holder.numPicker.setText(arrayForSaveEditTextValue[position]);
holder.numPicker.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
arrayForSaveEditTextValue[position] = arg0.toString();
}
});
...
}
来源：https://stackoverflow.com/questions/37066412/edittext-values-in-a-recyclerview-gives-same-value-after-5th-position