我正在对我的列表视图进行过滤搜索。我的listview代码执行得很好。我放了一个edittext对象，我将进行过滤搜索。我该怎么做？我的代码如下。
package com.nexum.imageloadingromjson;
public class MainActivity extends Activity {
private ListView list;
private MyAdapter adapter;
private final String parsingUrl = "someurl";
private String tag_coord = "Coord";
private String tag_lat = "Lat";// Double
private String tag_lon = "Lon";// Double
private String tag_image = "Image";
private String tag_InIzmir = "InIzmir";// Boolean
private String tag_name = "Name";
private ImageLoader imageLoader;
private EditText filteredittext;
private ProgressDialog pDialog;
private static int clickedItemPosition = -1;
private final int REQUEST_CODE_DETAIL = 1;
ArrayList<CoordItem> items;
ArrayList<CoordItem> filterlist;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
items = new ArrayList<CoordItem>();
filterlist = new ArrayList<CoordItem>();
adapter = new MyAdapter(this, R.layout.list_item, items);
list = (ListView) findViewById(R.id.exampList);
list.setAdapter(adapter);
list.setTextFilterEnabled(true);
filteredittext = (EditText)findViewById(R.id.filtersearchedittext);
filteredittext.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
viewitems.clear();
String search = filteredittext.getText().toString();
for (int i = 0; i < items.size(); i++) {
if(items.get(i).name.equals(search)){
viewitems.add(items.get(i));
adapter.notifyDataSetChanged();
}
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});
pDialog = new ProgressDialog(this);
pDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
pDialog.setMessage("Veriler alınıyor...");
new ListViewLoad().execute();
list.setOnItemClickListener(new OnItemClickListener() {
@SuppressLint("ShowToast")
@Override
public void onItemClick(AdapterView<?> a, View v, int position,
long id) {
/*
* String bulunma = ""; if (items.get(position).inIzmir) {
* bulunma+="İzmir de bulundu."; }else{
* bulunma+="İzmir de bulunmadı."; } String
* s="Name:"+items.get(position).name+"\nInIzmir:"+bulunma;
* Toast.makeText(getApplicationContext(), s,
* Toast.LENGTH_LONG).show();
*/
clickedItemPosition = position;
Intent myIntent = new Intent(MainActivity.this,
DetailActivity.class);
Bundle bundle = new Bundle();
bundle.putParcelable(
"parcelable_key",
new CoordItem(items.get(position).name, items
.get(position).img, items.get(position).lat,
items.get(position).lon,
items.get(position).inIzmir));
myIntent.putExtras(bundle);
// Güncelleme olayı burada baÅŸlıyor
// startActivityForResult(myIntent, REQUEST_CODE_DETAIL);
startActivityForResult(myIntent, REQUEST_CODE_DETAIL);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE_DETAIL && resultCode == RESULT_OK
&& data != null) {
CoordItem coorditem = new CoordItem(data.getStringExtra("name"),
items.get(clickedItemPosition).img, Double.parseDouble(data
.getStringExtra("lat")), Double.parseDouble(data
.getStringExtra("lon")),
items.get(clickedItemPosition).inIzmir);
items.set(clickedItemPosition, coorditem);
adapter.notifyDataSetChanged();
Toast.makeText(getApplicationContext(), "Guncelleme yapıldı.",
Toast.LENGTH_SHORT).show();
}
}
private class ListViewLoad extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog.show();
}
@Override
protected Void doInBackground(Void... params) {
String json = getStringFromURL(parsingUrl);
try {
final JSONArray jArray = new JSONArray(json);
for (int i = 0; i < jArray.length(); i++) {
JSONObject c = jArray.getJSONObject(i);
JSONObject coord = c.getJSONObject(tag_coord);
double lat = coord.getDouble(tag_lat);
double lon = coord.getDouble(tag_lon);
String image = c.getString(tag_image);
boolean InIzmir = c.getBoolean(tag_InIzmir);
String name = c.getString(tag_name);
CoordItem item = new CoordItem(name, image, lat, lon,
InIzmir);
items.add(item);
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
adapter.notifyDataSetChanged();
pDialog.dismiss();
}
}
private class MyAdapter extends ArrayAdapter<CoordItem> {
private LayoutInflater inflater;
public MyAdapter(Context context, int textViewResourceId,
ArrayList<CoordItem> objects) {
super(context, textViewResourceId, objects);
imageLoader = ImageLoader.getInstance();
imageLoader.init(ImageLoaderConfiguration.createDefault(context));
this.inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
if (items != null)
return items.size();
else
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewholder = null;
if (convertView == null) {
viewholder = new ViewHolder();
convertView = inflater.inflate(R.layout.list_item, parent,
false);
viewholder.listItemImage = (ImageView) convertView
.findViewById(R.id.listItemImage);
viewholder.listItemName = (TextView) convertView
.findViewById(R.id.listItemName);
viewholder.listItemInIzmir = (TextView) convertView
.findViewById(R.id.listItemInIzmir);
viewholder.listItemLatitude = (TextView) convertView
.findViewById(R.id.listItemLatitude);
viewholder.listItemLongitude = (TextView) convertView
.findViewById(R.id.listItemLongitude);
convertView.setTag(viewholder);
} else {
viewholder = (ViewHolder) convertView.getTag();
}
viewholder.listItemName.setText(items.get(position).name);
if (items.get(position).inIzmir) {
viewholder.listItemInIzmir.setText("Izmirde.");
} else {
viewholder.listItemInIzmir.setText("Izmirde degil.");
}
DisplayImageOptions options = new DisplayImageOptions.Builder().delayBeforeLoading(1000).build();
imageLoader.displayImage(items.get(position).img,viewholder.listItemImage,options);
return convertView;
}
public Drawable getDrawableFromUrl(URL url) {
try {
InputStream is = (InputStream) url.getContent();
Drawable d = Drawable.createFromStream(is, "src");
return d;
} catch (Exception e) {
return null;
}
}
}
static class ViewHolder {
ImageView listItemImage;
TextView listItemName, listItemInIzmir, listItemLatitude,
listItemLongitude;
}
public String getStringFromURL(String url) {
// Making HTTP request
String json = "";
InputStream is = null;
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
e.printStackTrace();
}
// return JSON String
return json;
}
}
我必须在这些代码中写入onTextChanged方法吗？我研究过但是没有找到这个类的代码。或者我没有编辑。
答案 0 :(得分：0)
请尝试使用以下代码。
you must integrate this line .. where you are setting adapter .
listView.setAdapter(new MyAddapter(this));
array_sort.clear();
array_sort.addAll(Service_Listitems);
然后使用下面的行。
edittext_search.addTextChangedListener(new TextWatcher(){
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start, int count, int after){
}
public void onTextChanged(CharSequence s, int start, int before, int count){
try {
Service_Listitems.clear();// Clear your arraylist initially
for (int i = 0; i < array_sort.size(); i++) {
if (array_sort.get(i) instanceof yourServiceSetterGetterClass) {
yourServiceSetterGetterClass cp1 = (yourServiceSetterGetterClass)array_sort.get(i);
String strOrig = "";
if (cp1.getFirstName() == null) {
strOrig = "";
} else {
strOrig = cp1.getFirstName().toUpperCase().trim();
}
String str = edittext_search.getText().toString().toUpperCase().trim();
if (strOrig.startsWith(str)) { Service_Listitems.add(cp1);
}
}
}
listView.setAdapter(new MyAddapter(this));
} catch (Exception e) {
e.printStackTrace();
}
}
});;
编辑
ArrayList<CoordItem> Service_Listitems= new ArrayList<CoordItem>();
private ArrayList<Object> array_sort = new ArrayList<Object>();
或者您也可以使用以下
private ArrayList<CoordItem> array_sort = new ArrayList<CoordItem>();
答案 1 :(得分：0)
要在listview上搜索，请查看此处的链接。
How can I filter ListView data when typing on EditText in android
如果您想进行自定义搜索，可以使用以下代码
activity_main.xml中
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<EditText
android:id="@+id/search"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
主要活动
public class MainActivity extends Activity {
ArrayList<NewData> mTemp=new ArrayList<NewData>(); //temporary list for search data
ArrayList<NewData> mPostingData=new ArrayList<NewData>(); //data to post in listview
ArrayList< NewData> mOri = new ArrayList<NewData>() ;//original data
// You can have two arraylist instead of three. 1. for original values 2. one for search result.
Myadapter ma;
EditText search;
NewData nd;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
for(int i = 0; i < 20; i++)
{
// Add your Json Parsed Data here
// each item from json add it to hash map in NewData class. Arraylist of 0 contains jsondata of customer1
nd=new NewData();
nd.newDatacus.put(NewData.TAG_CUSTOMER_CODE, "i"+i);
nd.newDatacus.put(NewData.TAG_CUSTOMER_NAME, "a"+i);
nd.newDatacus.put(NewData.TAG_CUSTOMER_MOBILE, "number");
nd.newDatacus.put(NewData.TAG_CUSTOMER_ADDRESS, "address");
mOri.add(nd);
}
ma= new Myadapter(MainActivity.this);
mPostingData=mOri;
mTemp=mOri;
ListView lv= (ListView) findViewById(R.id.list);
lv.setAdapter(ma);
search= (EditText) findViewById(R.id.search); //editext
search.addTextChangedListener(new TextWatcher() { //supply edittext value to filter
public void onTextChanged(CharSequence s, int start, int before, int count) {
ma.getFilter().filter(s);
ma.notifyDataSetChanged();
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void afterTextChanged(Editable s) {
}
});
}
class Myadapter extends ArrayAdapter
{
LayoutInflater mInflater;
public void setData(ArrayList<NewData> mPpst) { //function to set data based on search result
mPostingData = mPpst;//contains class items data.
}
@Override
public Filter getFilter() { //implement getFilter
return new Filter() {
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
if (results != null && results.count >= 0) {
setData((ArrayList<NewData>) results.values);//if results of search is null set the searched results data
} else {
setData(mOri);// set original values
}
notifyDataSetInvalidated();//refresh listview
}
//this performs filtering data.//check if data matches whats typed in editext
//add it to list if found. return list (founditems)
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults result = new FilterResults();
if (!TextUtils.isEmpty(constraint)) {
constraint = constraint.toString().toLowerCase();
ArrayList<NewData> foundItems = new ArrayList<NewData>();
if(mTemp!=null)
{
for(int i=0;i<mTemp.size();i++)
{
if (mTemp.get(i).newDatacus.get(NewData.TAG_CUSTOMER_CODE).toString().contains(constraint)) {
System.out.println("My datas"+mTemp.get(i).newDatacus.get(NewData.TAG_CUSTOMER_CODE).toString());
foundItems.add(mTemp.get(i));
}
else
{
}
}
}
result.count = foundItems.size();//search results found return count
result.values = foundItems;// return values
}
else
{
result.count=-1;// no search results found
}
return result;
}
};
}
public Myadapter(Context context) {
super(context, 0);
mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// TODO Auto-generated constructor stub
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return mPostingData.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder holder;
if(mOri == null ){
return null;
}
// When convertView is not null, we can reuse it directly, there is no need
// to reinflate it. We only inflate a new View when the convertView supplied
// by ListView is null.
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list, null);
convertView.setLayoutParams(new AbsListView.LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
// Creates a ViewHolder and store references to the two children views
// we want to bind data to.
holder = new ViewHolder();
holder.t1=(TextView) convertView.findViewById(R.id.textView1);
holder.t2 = (TextView) convertView.findViewById(R.id.textView2);
holder.t3 = (TextView) convertView.findViewById(R.id.textView3);
convertView.setTag(holder);
} else {
// Get the ViewHolder back to get fast access to the TextView
// and the ImageView.
holder = (ViewHolder) convertView.getTag();
}
holder.t1.setText(mPostingData.get(position).newDatacus.get(NewData.TAG_CUSTOMER_CODE).toString());
holder.t2.setText(mPostingData.get(position).newDatacus.get(NewData.TAG_CUSTOMER_NAME).toString());
holder.t3.setText(mPostingData.get(position).newDatacus.get(NewData.TAG_CUSTOMER_MOBILE).toString());
return convertView;
}
}
class ViewHolder
{
TextView t1,t2,t3;
}
}
list.xml
<?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="horizontal" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="20dp"
android:text="TextView" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="20dp"
android:text="TextView" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="20dp"
android:text="TextView" />
</LinearLayout>
NewData Class-保存hashmap中的所有数据
public class NewData {
public static final String TAG_CUSTOMER_CODE = "customer_code";
public static final String TAG_CUSTOMER_NAME = "customer_name";
public static final String TAG_CUSTOMER_MOBILE = "customer_mobile";
public static final String TAG_CUSTOMER_ADDRESS = "customer_address";
Hashtable newDatacus=new Hashtable();
public NewData()
{
newDatacus.put(NewData.TAG_CUSTOMER_CODE,new String());
newDatacus.put(NewData.TAG_CUSTOMER_ADDRESS,new String());
newDatacus.put(NewData.TAG_CUSTOMER_NAME,new String());
newDatacus.put(NewData.TAG_CUSTOMER_MOBILE,new String());
newDatacus.put(NewData.TAG_CUSTOMER_ADDRESS,new String());
}
}