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你好，我做了一个动态列表视图。现在我想在listview.if中添加过滤器，如果我在edittext中输入文本，那么计算搜索的项目应该显示.. hasve called addTextChangedListener to my edittext..and叫我adapter..but很老我应该怎么在我的滤波方法写成它是一个动态的ListView任何想法的方法过滤器...过滤器动态列表视图android
这里是我的代码：
package com.XXXXX.XXXXX;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Locale;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v4.widget.SwipeRefreshLayout.OnRefreshListener;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.AdapterView.OnItemClickListener;
import com.XXXXX.adapter.UpdateSingleItemViewActivity;
import com.XXXXX.adapter.UpdatesAdapterList;
import com.XXXXX.local.database.DBController;
import com.XXXXX.XXXXX.XXXXX.constant.Constant;
import com.XXXXX.XXXXX.XXXXX.utils.Utility;
public class Cardiology_updates extends Activity implements OnClickListener,
OnRefreshListener {
EditText et ;
private Context appContext;
// ProgressDialog mProgressDialog;
private Dialog dialog;
private boolean isFinish = false;
String result = "";
JSONObject jsonobject;
JSONArray jsonArray;
ArrayList<HashMap<String, String>> UpdatesHmList;
public static ArrayList<HashMap<String, String>> FinalLocalDataList;
ArrayList<HashMap<String, String>> LocalDataList;
DBController controller = new DBController(this);
HashMap<String, String> queryValues;
ListView list;
UpdatesAdapterList adapter;
public static String UpdateID = "UpdateID";
public static String UpdateTitle = "Title";
/*
* public static String UpdateDescription = "Description"; public static
* String POPULATION = "UpdateDate"; public static String UpdateImage =
* "Photo";
*/
public static String UpdateDescription = "Description";
public static String POPULATION = "Title";
public static String UpdateImage = "Complete_imagePath";
public static String Complete_imagePath;
public static String Title;
public static String Description;
SwipeRefreshLayout swipeLayout;
private ProgressBar progressbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_cardiology_updates);
// controller.deleteAllJsonData();
appContext = this;
animationView();
initComponent();
}
private void animationView() {
// TODO Auto-generated method stub
progressbar = (ProgressBar) findViewById(R.id.loading);
}
private void initComponent() {
// TODO Auto-generated method stub
swipeLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_container);
swipeLayout.setOnRefreshListener(this);
swipeLayout.setColorScheme(android.R.color.holo_blue_bright,
android.R.color.holo_green_light,
android.R.color.holo_orange_light,
android.R.color.holo_red_light);
dialog = new Dialog(appContext);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.alert_dialog);
((Button) findViewById(R.id.Button01)).setOnClickListener(this);
((Button) dialog.findViewById(R.id.btnOk)).setOnClickListener(this);
new GetUpdatesInfo().execute();
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (v.getId() == R.id.Button01) {
finish();
// finishActivity() ;
} else if (v.getId() == R.id.btnOk) {
dialog.dismiss();
if (isFinish) {
this.finish();
}
}
}
public class GetUpdatesInfo extends AsyncTask<String, Void, String> {
protected void onPreExecute() {
super.onPreExecute();
if (progressbar.getVisibility() != View.VISIBLE) {
progressbar.setVisibility(View.VISIBLE);
}
}
@Override
protected String doInBackground(String... params) {
// Create an array
UpdatesHmList = new ArrayList<HashMap<String, String>>();
// Retrieve JSON Objects from the given URL address
String url = null;
url = Constant.serverUrl + "/GetUpdateList";
result = Utility.postParamsAndfindJSON(url);
Log.e("result doInBackground", "" + result);
if (!(result == null)) {
try {
controller.deleteAllJsonData();
// Locate the array name in JSON
jsonArray = new JSONArray(result);
for (int i = 0; i < jsonArray.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
jsonobject = jsonArray.getJSONObject(i);
// Retrive JSON Objects
map.put("UpdateID", jsonobject.getString("UpdateID"));
map.put("Title", jsonobject.getString("Title"));
String Upadates_Photo = jsonobject.optString("Photo")
.toString();
String Complete_imagePath = Constant.prifixserverUrl
+ Upadates_Photo;
String Title = jsonobject.getString("Title").toString();
String Description = jsonobject
.getString("Description").toString();
String noHtml = Description.replaceAll("<[^>]*>", "");
String parseResponse = noHtml.replaceAll(" ", "");
map.put("Photo", Complete_imagePath);
map.put("Description", Description);
map.put("UpdateDate",
jsonobject.getString("UpdateDate"));
Log.e("UpdateID ",
" "
+ jsonobject.getString("UpdateID")
.toString());
Log.e("Title ", " "
+ jsonobject.getString("Title").toString());
Log.e("Complete_imagePath ",
" " + Complete_imagePath.toString());
Log.e("Description ", " " + parseResponse);
Log.e("UpdateDate ",
" "
+ jsonobject.getString("UpdateDate")
.toString());
queryValues = new HashMap<String, String>();
queryValues.put("Complete_imagePath",
Complete_imagePath);
queryValues.put("Title", Title);
queryValues.put("Description", Description);
controller.insertAllJsonData(queryValues);
// Set the JSON Objects into the array
UpdatesHmList.add(map);
}
} catch (JSONException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
}
return result;
}
@Override
protected void onPostExecute(String result) {
// Locate the listview in listview_main.xml
if (progressbar.getVisibility() == View.VISIBLE) {
progressbar.setVisibility(View.GONE);
}
/*
* if (result == null) { //mProgressDialog.dismiss();
* localalldata();
*
* }
*/
localalldata();
/*
* list = (ListView) findViewById(R.id.list_Upadates); // Pass the
* results into ListViewAdapter.java adapter = new
* UpdatesAdapterList(Cardiology_updates.this, FinalLocalDataList);
* // Set the adapter to the ListView list.setAdapter(adapter);
*/
// Close the progressdialog
// mProgressDialog.dismiss();
}
}
@Override
public void onRefresh() {
// TODO Auto-generated method stub
// TODO Auto-generated method stub
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
getSomeData();
// localalldata();
swipeLayout.setRefreshing(false);
}
}, 5000);
}
protected void getSomeData() {
// TODO Auto-generated method stub
// localalldata();
new GetUpdatesInfo().execute();
adapter.notifyDataSetChanged();
/*
* if (LocalDataList == null) { Log.e("LocalDataList inside if ",
* "LocalDataList inside if "); new GetUpdatesInfo().execute();
*
* } else { // adapter.imageLoader.clearCache();
* Log.e("LocalDataList else ", "LocalDataList else ");
*
* adapter.notifyDataSetChanged(); }
*/
}
private void localalldata() {
// TODO Auto-generated method stub
LocalDataList = controller.getAllJsonData();
FinalLocalDataList = new ArrayList<HashMap<String, String>>();
for (HashMap<String, String> hashMap : LocalDataList) {
System.out.println(hashMap.keySet());
HashMap<String, String> map = new HashMap<String, String>();
for (String key : hashMap.keySet()) {
System.out.println(hashMap.get(key));
Complete_imagePath = hashMap.get("Complete_imagePath");
Title = hashMap.get("Title");
Description = hashMap.get("Description");
map.put("Complete_imagePath", Complete_imagePath);
map.put("Title", Title);
map.put("Description", Description);
Log.v("All Json CodiateUpdate Title", "" + Complete_imagePath);
Log.v("All Json CodiateUpdate Title", "" + Title);
}
FinalLocalDataList.add(map);
}
list = (ListView) findViewById(R.id.list_Upadates);
// Pass the results into ListViewAdapter.java
adapter = new UpdatesAdapterList(Cardiology_updates.this,
FinalLocalDataList);
// Set the adapter to the ListView
list.setAdapter(adapter);
// adapter.notifyDataSetChanged();
et = (EditText) findViewById(R.id.search);
// Capture Text in EditText
et.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable arg0) {
// 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 onTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
//String text = et.getText().toString().toLowerCase(Locale.getDefault());
adapter.getFilter().filter(arg0);
}
});
}
}
这里我的适配器类包括过滤器：
package com.XXXXX.adapter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Locale;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.ImageView;
import android.widget.TextView;
import com.XXXXX.XXXXX.Cardiology_updates;
import com.XXXXX.XXXXX.R;
import com.XXXXX.imageloader.ImageLoader;
public class UpdatesAdapterList extends BaseAdapter implements Filterable {
// Declare Variables
Context context;
LayoutInflater inflater;
ArrayList<HashMap<String, String>> data;
public ImageLoader imageLoader;
private Activity activity;
HashMap<String, String> resultp = new HashMap<String, String>();
public UpdatesAdapterList(Context context,
ArrayList<HashMap<String, String>> arraylist) {
this.context = context;
data = arraylist;
imageLoader = new ImageLoader(context.getApplicationContext());
}
@Override
public int getCount() {
return data.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
public View getView(final int position, View convertView, ViewGroup parent) {
// Declare Variables
TextView UpdateTitle;
TextView country;
TextView population;
ImageView UpdateImage;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.listview_updateitem, parent, false);
// Get the position
resultp = data.get(position);
// Locate the TextViews in listview_item.xml
UpdateTitle = (TextView) itemView.findViewById(R.id.txtUpdatetitle);
//country = (TextView) itemView.findViewById(R.id.country);
// population = (TextView) itemView.findViewById(R.id.population);
// Locate the ImageView in listview_item.xml
UpdateImage = (ImageView) itemView.findViewById(R.id.list_UpdateImage);
// Capture position and set results to the TextViews
UpdateTitle.setText(resultp.get(Cardiology_updates.UpdateTitle));
// country.setText(resultp.get(UpdatesActivity.COUNTRY));
// population.setText());
// Capture position and set results to the ImageView
// Passes flag images URL into ImageLoader.class
imageLoader.DisplayImage(resultp.get(Cardiology_updates.UpdateImage), UpdateImage);
// Capture ListView item click
itemView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// Get the position
resultp = data.get(position);
Intent intent = new Intent(context, UpdateSingleItemViewActivity.class);
// Pass all data rank
intent.putExtra("UpdateTile", resultp.get(Cardiology_updates.UpdateTitle));
// Pass all data country
intent.putExtra("UpdateDescription", resultp.get(Cardiology_updates.UpdateDescription));
// Pass all data population
intent.putExtra("population",resultp.get(Cardiology_updates.POPULATION));
// Pass all data flag
intent.putExtra("UpdateImage", resultp.get(Cardiology_updates.UpdateImage));
// Start SingleItemView Class
intent.putExtra("position", position);
context.startActivity(intent);
}
});
return itemView;
}
public Filter getFilter() {
Filter filter = new Filter() {
FilterResults results;
ArrayList<HashMap<String, String>> filteredList;
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
// Has the filtered values
data = (ArrayList<HashMap<String, String>>) results.values;
notifyDataSetChanged();
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
// Holds the results of a filtering operation in values
results = new FilterResults();
filteredList= new ArrayList<HashMap<String, String>>();
//This is the search string user typed in EditText.
String searchString = constraint.toString().toUpperCase(Locale.getDefault());
/*
* Code to update the filteredList based on Search String.
*
* I'm just writing pseudo code for search, based on
* Cardiology_updates.UpdateTitle
*/
int mCount=data.size();
for (int i = 0; i < mCount; i++) {
HashMap<String, String> obj= data.get(i);
String updateTitle=obj.get(Cardiology_updates.UpdateTitle);
if(updateTitle.contains(searchString)){
filteredList.add(obj);
}
}
synchronized (this) {
// set the Filtered result to return
results.count = filteredList.size();
results.values = filteredList;
}
return results;
}
};
return filter;
}
}
很老任何想法在逻辑部分被软件写.. :( – vvv12 2014-11-06 09:17:28
我已经为搜索逻辑更新的伪代码。 – blizzard 2014-11-06 10:38:41
我的列表视图是越来越过滤完美，但同时backpressing按钮清除列表视图的EditText不获取更新 – vvv12 2014-11-10 13:58:50