您好我需要一些帮助来根据我的关键字过滤我的列表。这是我为此编写的代码，但它不起作用。请帮我解决这个问题。
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
/**
* Created by jignesh on 28-07-2016.
*/
public class stock_product extends AppCompatActivity {
String type;
private static final String LOGIN_URL = "http://www.hetinfosolution.com/AdMobileApp/stock_full_list.php";
String myJSON;
private static final String TAG_ID="id";
private static final String TAG_NAME="name";
private static final String PTAG_NAME="stock_name";
private static final String TAG_RESULT="result";
private static final String SIZE_METER="size_meter";
private static final String SIZE_SQARE_FEET="size_square_feet";
private static final String EXP_QTY="expected_qty";
private static final String EXP_DATE="expected_date";
JSONArray STOCK_LIST = null;
String [] items;
ArrayList<HashMap<String, String>> personList;
ListView list;
EditText editText;
ArrayList<String> listItems;
// List view
private ListView lv;
// Listview Adapter
ArrayAdapter<String> adapter;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.display_stock);
Intent i = getIntent();
type = i.getStringExtra("type");
TextView heading = (TextView) findViewById(R.id.textView);
heading.setText(type);
list = (ListView)findViewById(R.id.StockType);
editText = (EditText)findViewById(R.id.txtSearch);
personList = new ArrayList<HashMap<String,String>>();
//// LoadData for fill listview data
LodaData();
/// here is method for search
editText.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) {
if(s.toString().equals("")){
//Reset ListView
LodaData();
}else{
/// SearchItem method created for search string and populate listview after search
SearchItem(s.toString());
}
}
@Override
public void afterTextChanged(Editable s) {
}
});
}
public void SearchItem(String item){
// here write code for search
}
}
public void LodaData() {
class stock extends AsyncTask<String, Void, String> {
ProgressDialog loading;
@Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(stock_product.this, "Please Wait...", null, true, true);
}
protected void onPostExecute(String s) {
super.onPostExecute(s);
loading.dismiss();
myJSON=s;
listView();
}
@Override
protected String doInBackground(String... params) {
HashMap<String, String> data = new HashMap<>();
data.put("username", type);
RegisterUserClass ruc = new RegisterUserClass();
String result = ruc.sendPostRequest(LOGIN_URL, data);
return result;
}
}
stock ulc = new stock();
ulc.execute(type);
}
private void listView() {
try {
// JSONObject jsonObject = new JSONObject(myJSON);
JSONObject jsonObject = new JSONObject(myJSON);
// jsonObject = new JSONObject(myJSON);
STOCK_LIST = jsonObject.getJSONArray(TAG_RESULT);
for(int i=0; i<STOCK_LIST.length(); i++){
JSONObject c = STOCK_LIST.getJSONObject(i);
String name = c.getString(PTAG_NAME);
String size_meter = c.getString(SIZE_METER);
String size_square_feet = c.getString(SIZE_SQARE_FEET);
String expected_date = c.getString(EXP_DATE);
String expected_qty = c.getString(EXP_QTY);
HashMap<String,String> STOCK = new HashMap<String, String>();
STOCK.put(PTAG_NAME,name);
STOCK.put(SIZE_METER,size_meter);
STOCK.put(SIZE_SQARE_FEET,size_square_feet);
STOCK.put(EXP_DATE,expected_date);
STOCK.put(EXP_QTY,expected_qty);
personList.add(STOCK);
}
ListAdapter adapter = new SimpleAdapter(
stock_product.this,personList,R.layout.list_stock,
new String[]{PTAG_NAME,SIZE_METER,SIZE_SQARE_FEET,EXP_DATE,EXP_QTY},
new int[]{R.id.name,R.id.size_meter,R.id.size_square_feet,R.id.expected_date,R.id.expected_qty}
);
list.setAdapter(adapter);
listItems = new ArrayList(Arrays.asList(personList));
list.setOnItemClickListener(
new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//String value = (String)list.getItemAtPosition((int)id);
TextView c = (TextView)view.findViewById(R.id.name);
String value = c.getText().toString();
TextView sizeMeter = (TextView)view.findViewById(R.id.size_meter);
String valuesizeMeter = sizeMeter.getText().toString();
TextView size_square_feet = (TextView)view.findViewById(R.id.size_square_feet);
String valuesize_square_feet = size_square_feet.getText().toString();
TextView expected_qty = (TextView)view.findViewById(R.id.expected_qty);
String valueexpected_qtyet = expected_qty.getText().toString();
TextView expected_date = (TextView)view.findViewById(R.id.expected_date);
String valueexpected_date = expected_date.getText().toString();
double SUM;
if(type=="Sonatine Blinds"){
SUM = Float.parseFloat(valuesizeMeter)*Float.parseFloat(valuesize_square_feet)*10.76/2;
}else if(type=="Vertical Blinds"){
SUM = Float.parseFloat(valuesizeMeter);
}else{
SUM= Float.parseFloat(valuesizeMeter)*Float.parseFloat(valuesize_square_feet)*10.76;
}
AlertDialog.Builder a_builder = new AlertDialog.Builder(stock_product.this);
a_builder.setMessage("PRODUCT NAME : "+value+"\n"+
"QUANTITY IN SQF : "+SUM+"\n"+
"QUANTITY IN METER : "+valuesizeMeter+"\n"+
"EXPECTED DATE OF ARRIVAL : "+valueexpected_date+"\n"+
"QUANTITY IN TRANSIT (In Mtr): "+valueexpected_qtyet)
.setCancelable(true)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog alert = a_builder.create();
alert.setTitle("PRODUCT STOCK DETAIL ");
alert.show();
}
}
);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
答案 0 :(得分：0)
潜水员是正确的。 在editdetext侦听器的OnTextChanged方法中使用stock_product.this.getFilter（）。filter（s）