나는이 listview와 함께 edittext각 행 내부 위젯. 모든 뷰를 추적하기 위해 viewholder내부를 사용합니다 custom adapter.
하지만 내 문제는 내 값을 입력하면 edittext화면 시간이 초과 될 때까지 일시 중지하고 여전히 동일한 상태에서 전화를 잠금 해제 activity하면 기본값 edittext이 다시 채워져 편집 내용을 덮어 쓴다는 것입니다.
나는 아마도 내가 오른쪽을 사용하지 않지만 여전히 같은 문제에 직면하고 있다는 것을 고려하여 여기 에서이 제안을 따랐습니다 (목록보기가 그 시간을 스크롤 할 때 edittext가 기본값을 설정했을 때)viewholder . getView()계속 전화를 받고 내 견해를 완전히 다시 그리는 것과 같습니다 .
해결 방법에 대한 아이디어 / 제안이 있습니까?
package com.shop.shopOfficer;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.ImageView;
import android.widget.TextView;
import com.shopOfficer.R;
import java.util.ArrayList;
import java.util.List;
/**
* Created by steve on 2/15/16.
*/
public class ProductListAdapter extends BaseAdapter implements Filterable {
List<ProductModel> mStringFilterList;
ValueFilter valueFilter;
private Activity activity;
private LayoutInflater inflater;
private List<ProductModel> modelItems;
private AddRemoveProductInterface myActivityInterface;
public ProductListAdapter(Activity activity, List<ProductModel> modelItems, AddRemoveProductInterface myActivityInterface) {
this.activity = activity;
this.modelItems = modelItems;
mStringFilterList = modelItems;
this.myActivityInterface = myActivityInterface;
}
@Override
public int getCount() {
return modelItems.size();
}
@Override
public Object getItem(int location) {
return modelItems.get(location);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolderItem viewHolder;
if (convertView == null) {
// inflate the layout
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.product_item_row, null);
// well set up the ViewHolder
viewHolder = new ViewHolderItem();
viewHolder.tvTitle = (TextView) convertView.findViewById(R.id.tv2);
viewHolder.price = (TextView) convertView.findViewById(R.id.price);
viewHolder.p = (TextView) convertView.findViewById(R.id.p);
viewHolder.minus = (Button) convertView.findViewById(R.id.minus);
viewHolder.add = (Button) convertView.findViewById(R.id.add);
viewHolder.quantity = (EditText) convertView.findViewById(R.id.num);
viewHolder.quantity.addTextChangedListener(new MyTextWatcher(convertView, position));
viewHolder.add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//get the value of edittext
//add one item
int added_item = Integer.parseInt(viewHolder.quantity.getText().toString()) + 1;
viewHolder.quantity.setText("" + added_item);
}
});
viewHolder.minus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int removed_item = Integer.parseInt(viewHolder.quantity.getText().toString()) - 1;
if (removed_item >= 0) {
viewHolder.quantity.setText("" + removed_item);
} else {
}
}
});
// store the holder with the view.
convertView.setTag(viewHolder);
} else {
// we've just avoided calling findViewById() on resource everytime
// just use the viewHolder
viewHolder = (ViewHolderItem) convertView.getTag();
}
// object item based on the position
final ProductModel m = modelItems.get(position);
viewHolder.tvTitle.setText(m.getname());
viewHolder.price.setText("(" + m.getPrice() + ")");
viewHolder.p.setText(m.getPrice());
viewHolder.quantity.setTag(m);
viewHolder.quantity.setText(String.valueOf(m.getTQuantity()));
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(inflater.getContext(), EditProduct.class);
intent.putExtra("name", m.getname());
intent.putExtra("price", m.getPrice());
intent.putExtra("description", m.getproductDesc());
intent.putExtra("image_url", m.getImage_url());
inflater.getContext().startActivity(intent);
}
});
return convertView;
}
@Override
public Filter getFilter() {
if (valueFilter == null) {
valueFilter = new ValueFilter();
}
return valueFilter;
}
private class ValueFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
if (constraint != null && constraint.length() > 0) {
ArrayList<ProductModel> filterList = new ArrayList<>();
for (int i = 0; i < mStringFilterList.size(); i++)
if ((mStringFilterList.get(i).getname().toUpperCase())
.contains(constraint.toString().toUpperCase()) ||
(mStringFilterList.get(i).getproductDesc().toUpperCase())
.contains(constraint.toString().toUpperCase())) {
ProductModel m = new ProductModel(mStringFilterList.get(i)
.getname(), mStringFilterList.get(i)
.getproductId(), mStringFilterList.get(i)
.getImage_url(), mStringFilterList.get(i)
.getPrice(), mStringFilterList.get(i)
.getproductDesc());
filterList.add(m);
}
results.count = filterList.size();
results.values = filterList;
} else {
results.count = mStringFilterList.size();
results.values = mStringFilterList;
//show no results were picked
//(myActivityInterface).onSearchEmpty("No results found");
}
return results;
}
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
//if(results)
modelItems = (List<ProductModel>) results.values;
if (modelItems.size() > 0) {
notifyDataSetChanged();
} else {
(myActivityInterface).onSearchEmpty("No results found");
}
}
}
static class ViewHolderItem {
TextView tvTitle, price, p;
Button add, minus;
EditText quantity;
}
private class MyTextWatcher implements TextWatcher {
View view;
int position;
public MyTextWatcher(View convertView, int position) {
this.view = convertView;
this.position = position;
}
@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) {
EditText qtyView = (EditText) view.findViewById(R.id.num);
// ProductModel m = modelItems.get(position);
String qtyString = s.toString().trim();
int quantity = qtyString.equals("") ? 0:Integer.valueOf(qtyString);
ProductModel m = (ProductModel)qtyView.getTag();
if(m.getTQuantity() != quantity) {
m.setTQuantity(quantity);
String price = ((TextView) view.findViewById(R.id.p))
.getText().toString();
String name = ((TextView) view.findViewById(R.id.tv2))
.getText().toString();
int database_position = 1 + position;
Log.d("my position", "" + position);
Log.d("my value", s.toString() + price);
(myActivityInterface).onAdded(s.toString().trim(), price, database_position, name);
}
}
}
}활동 코드 :
public class ProductList extends AppCompatActivity implements AddRemoveProductInterface {
ListView listView, checkout_listview;
EditText inputSearch;
ProductListAdapter adapter;
ProductCheckoutAdapter checkout_adapter;
ProductHandler productDB;
String tag_json_obj = "json_obj_req";
TextView total;
String unformatted_number;
String c_phone, c_zip, c_name, total_amount, checkout_id;
Boolean c_extras;
fr.castorflex.android.smoothprogressbar.SmoothProgressBar progbar;
Button button;
byte[] b;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_product_list);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
total = (TextView) findViewById(R.id.total);
total.setText("0.00");
Intent i = getIntent();
Bundle extras = i.getExtras();
if (extras == null) {
//is null
c_extras = false;
} else {
//has extras
c_extras = true;
b = extras.getByteArray("picture");
c_phone = i.getStringExtra("phone");
c_zip = i.getStringExtra("zip");
c_name = i.getStringExtra("name");
total_amount = i.getStringExtra("total_amount");
checkout_id = i.getStringExtra("checkout_id");
if (total_amount == null) {
total.setText("0.00");
} else {
total.setText(total_amount);
}
// Toast.makeText(getApplicationContext(), total_amount, Toast.LENGTH_LONG).show();
}
productDB = new ProductHandler(this);
/* sbv = (SlideBottomPanel) findViewById(R.id.sbv);*/
progbar = (fr.castorflex.android.smoothprogressbar.SmoothProgressBar) findViewById(R.id.prog1);
listView = (ListView) findViewById(R.id.list);
// listView.setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);
checkout_listview = (ListView) findViewById(R.id.checkout_list);
// insert data into the list before setting the adapter
// otherwise it will generate NullPointerException - Obviously
productListRequest();
showProductFromTable();
inputSearch = (EditText) findViewById(R.id.inputSearch);
inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changed the Text
/* ProductList.this.myList.getFilter().filter(cs);*/
if (cs.length() > 0) {
adapter.getFilter().filter(cs);
} else {
TextView search = (TextView) findViewById(R.id.no_results);
search.setVisibility(View.INVISIBLE);
adapter.getFilter().filter(cs);
}
}
@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
}
});
final LinearLayout animated_layout = (LinearLayout) findViewById(R.id.list_animated);
//animating product sold list
button = (Button) findViewById(R.id.submit);
if (total.getText().toString().equals("0.00")) {
button.setEnabled(false);
} else {
button.setEnabled(true);
}
button.setOnClickListener(new View.OnClickListener() {
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
@Override
public void onClick(View v) {
Log.d("JSON PROD:", productDB.composeProductSolddJSONfromSQLite());
Intent intent = new Intent(getApplicationContext(), CustomerIdentify.class);
intent.putExtra("total_sld", unformatted_number);
//send extras if exist to identify activity
if (c_extras) {
intent.putExtra("picture", b);
intent.putExtra("c_phone", c_phone);
intent.putExtra("c_extras", c_extras);
intent.putExtra("c_zip", c_zip);
intent.putExtra("c_name", c_name);
}
startActivity(intent);
}
});
}
private void showProductFromTable() {
//progbar.setVisibility(View.INVISIBLE);
ArrayList<ProductModel> modelArrayList = productDB.loadProduct();
//adding it to the list view.
adapter = new ProductListAdapter(this, modelArrayList, this);
listView.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
public void productListRequest() {
progbar.setVisibility(View.VISIBLE);
String url = "http://shopofficer.com/business/products/api";
JsonArrayRequest jsonObjReq = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
Log.d("product list response:", response.toString());
//listView.setVisibility(View.VISIBLE);
progbar.setVisibility(View.INVISIBLE);
// Parsing json
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
String name = obj.getString("name");
String price = obj.getString("price");
String description = obj.getString("description");
String image = obj.getString("image");
String product_id = obj.getString("id");
/*Log.d("my data is", id + title + description);*/
productDB.addProduct(product_id, name, price, description, image, "0");
showProductFromTable();
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d("productlist error",
"Error: " + error.getMessage());
/* Crouton.makeText(AttendantList.this, "Something went wrong, please retry",
Style.ALERT, R.id.anchor).show();*/
progbar.setVisibility(View.INVISIBLE);
}
}) {
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("session_id", getapikey());
return headers;
}
};
ShopOfficer.getInstance().getRequestQueue().getCache()
.invalidate(url, true);
// Adding request to request queue
ShopOfficer.getInstance().addToRequestQueue(jsonObjReq, tag_json_obj);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_select_product, menu);
return true;
}
@Override
public void onResume() {
super.onResume();
showProductFromTable();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_add_product) {
Intent intent = new Intent(getApplicationContext(), AddNewProduct.class);
startActivity(intent);
return true;
}
if (id == android.R.id.home) {
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onAdded(String s, String price, int database_position, String name) {
if (s.equals("")) {
} else {
//set total
Double currentPrice = Double.valueOf(price);
Double quantity = Double.valueOf(s);
Double calculated = quantity * currentPrice;
//Double priceDiff = Double.valueOf(df.format(extPrice - currPrice));
productDB.update(database_position, "" + calculated);
DecimalFormat df = new DecimalFormat("0.00##");
//add commas thousands
unformatted_number = String.valueOf(df.format(productDB.getTotalOfAmount()));
double amount = Double.parseDouble(unformatted_number);
DecimalFormat formatter = new DecimalFormat("#,###.00");
total.setText("" + formatter.format(amount));
if (total.getText().toString().equals(".00")) {
total.setText("0.00");
}
//add product sold
if (quantity < 1) {
productDB.deleteSingleProductSold(Integer.valueOf(s));
} else {
productDB.addSale(database_position, name, String.valueOf(calculated), s);
}
if (total.getText().toString().equals("0.00")) {
button.setEnabled(false);
} else {
button.setEnabled(true);
}
}
}
@Override
public void onRemoved(String s) {
total.setText("");
}
@Override
public void onSearchEmpty(String s) {
// Toast.makeText(getApplicationContext(), s, Toast.LENGTH_LONG).show();
TextView search = (TextView) findViewById(R.id.no_results);
search.setVisibility(View.VISIBLE);
search.setText(s);
}
}뷰와 뷰 홀더는 행과 일시적으로 만 연결됩니다. 이는 편집 된 데이터를 다른 곳에 저장해야 함을 의미합니다. 그렇지 않으면보기를 스크롤하거나 다시 작성할 때와 같이보기가 다시 작성되거나 다른 행에 재사용 될 때마다 정보가 손실됩니다.
한 가지 가능한 해결책은 모델에 추가하는 것입니다.
데이터 (수량)를 ProductModel. ( the_quantity)
뷰 홀더 ( the_position)에 위치 속성을 추가합니다 . 이는 리스너가 익명 클래스이기 때문에 필요합니다. 그들은 position인스턴스화되었을 때 가지고 있던 값으로 매개 변수 의 값 (복사본)을 봅니다.
이것이 컴파일러가 때때로 position매개 변수가 최종적이지 않다고 불평하는 이유 이며 일반적으로 무언가 잘못되었다는 의미입니다. 콜백 외부에서만 참조해야합니다.
UI-> 모델 : 수정 된 값을 모델에 저장 (두 리스너 모두)
public void onClick(View v) {
//get the value of edittext
//add one item
int added_item = Integer.parseInt(viewHolder.quantity.getText().toString()) + 1;
// Store the value in the model
// We use the position from the viewholder,
// **not** the method's parameter (which contain
// the value when the listener was created)
modelItems.get(viewHolder.the_position).the_quantity = added_item;
viewHolder.quantity.setText("" + added_item);
}
Model-> UI : 뷰 생성시뿐만 아니라 매번 UI 업데이트
// object item based on the position
final ProductModel m = modelItems.get(position);
viewHolder.tvTitle.setText(m.getname());
// update the viewholder's position
viewHolder.the_position = position;
viewHolder.quantity.setText("" + m.the_quantity)
return convertView;
이 기사는 인터넷에서 수집됩니다. 재 인쇄 할 때 출처를 알려주십시오.
침해가 발생한 경우 연락 주시기 바랍니다[email protected] 삭제
몇 마디 만하겠습니다