为了搜索listview中已完成编码的数据项，这是逻辑，在arraylist上创建了onTextChanged，edittext的关键字是与listview进行比较，结果存储在名为arraylist的{{1}}中，并使用searchResult将其显示在lazyadapter中，以便能够获得搜索结果listview但是现在我必须告诉惰性适配器按顺序排列toast的项目并在listview中显示，我在很多方面尝试过，但没有任何帮助我得到结果。< / p>
这是我的完整代码listview。
lazyadapterLazyAdapter
public class Home extends ListActivity {
ArrayList<HashMap<String, String>> songsList;
ListView list;
LazyAdapter adapter;
JSONArray posts;
//ArrayList thats going to hold the search results
ArrayList<HashMap<String, String>> searchResults;
LayoutInflater inflater;
// All static variables
static final String URL = "http://www.abc.com/ads/?json=get_recent_posts";
static final String KEY_POSTS = "posts";
static final String KEY_ID = "id";
static final String KEY_TITLE = "title";
static final String KEY_DATE = "date";
static final String KEY_CONTENT = "content";
static final String KEY_AUTHOR = "author";
static final String KEY_NAME = "name";
static final String KEY_ATTACHMENTS = "attachments";
static final String KEY_SLUG = "slug";
static final String KEY_THUMB_URL = "thumbnail";
static final String KEY_IMAGES = "images";
static final String KEY_URL = "url";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final EditText searchBox=(EditText) findViewById(R.id.search);
final ListView list=(ListView)findViewById(android.R.id.list);
//get the LayoutInflater for inflating the customomView
//this will be used in the custom adapter
inflater=(LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
// Creating JSON Parser instance
final JSONParser jParser = new JSONParser();
// getting JSON string from URL
JSONObject json = jParser.getJSONFromUrl(URL);
try {
posts = json.getJSONArray(KEY_POSTS);
// looping through all song nodes <song>
for(int i = 0; i < posts.length(); i++){
JSONObject c = posts.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(KEY_ID);
String title = c.getString(KEY_TITLE);
String date = c.getString(KEY_DATE);
String content = c.getString(KEY_CONTENT);
// to remove all <P> </p> and <br /> and replace with ""
content = content.replace("<br />", "");
content = content.replace("<p>", "");
content = content.replace("</p>", "");
//authornumber is agin JSON Object
JSONObject author = c.getJSONObject(KEY_AUTHOR);
String name = author.getString(KEY_NAME);
String url = null;
String slug = null;
try {
JSONArray atta = c.getJSONArray("attachments");
for(int j = 0; j < atta.length(); j++){
JSONObject d = atta.getJSONObject(j);
slug = d.getString(KEY_SLUG);
JSONObject images = d.getJSONObject(KEY_IMAGES);
JSONObject thumbnail = images.getJSONObject(KEY_THUMB_URL);
url = thumbnail.getString(KEY_URL);
}
} catch (Exception e) {
e.printStackTrace();
}
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(KEY_ID, id);
map.put(KEY_TITLE, title);
map.put(KEY_DATE, date);
map.put(KEY_NAME, name);
map.put(KEY_CONTENT, content);
map.put(KEY_SLUG, slug);
map.put(KEY_URL, url);
// adding HashList to ArrayList
songsList.add(map);
}
}catch (JSONException e) {
e.printStackTrace();
}
//searchResults=OriginalValues initially
searchResults=new ArrayList<HashMap<String, String>>(songsList);
// Getting adapter by passing json data ArrayList
adapter=new LazyAdapter(this, songsList);
list.setAdapter(adapter);
searchBox.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
//get the text in the EditText
String searchString=searchBox.getText().toString();
int textLength=searchString.length();
//clear the initial data set
searchResults.clear();
for(int i=0;i<songsList.size();i++)
{
String playerName=songsList.get(i).get("title").toString();
if(textLength<=playerName.length()){
//compare the String in EditText with Names in the ArrayList
if(searchString.equalsIgnoreCase(playerName.substring(0,textLength)))
Toast.makeText(getApplicationContext(),playerName,1).show();
searchResults.add(songsList.get(i));
}
}
adapter=new LazyAdapter(Home.this, searchResults);
list.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void afterTextChanged(Editable s) {
}
});
}
答案 0 :(得分：0)
我想你错过了这一行只是在yourActivity.this.adapter.getFilter().filter(cs);添加这一行
这里addTextChangedListener这个
searchBox.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int start, int count, int after) {
// your data
Home .this.adapter.getFilter().filter(cs);
}
编辑：改变这样
public void onTextChanged(CharSequence s, int start, int before, int count) {
//get the text in the EditText
String searchString=searchBox.getText().toString();
int textLength=searchString.length();
//clear the initial data set
searchResults.clear();
for(int i=0;i<songsList.size();i++)
{
String playerName=songsList.get(i).get("title").toString();
if(textLength<=playerName.length()){
//compare the String in EditText with Names in the ArrayList
if(searchString.equalsIgnoreCase(playerName.substring(0,textLength)))
Toast.makeText(getApplicationContext(),playerName,1).show();
searchResults.add(songsList.get(i));
}
}
adapter=new LazyAdapter(Home.this, searchResults);
list.setAdapter(adapter);
adapter.notifyDataSetChanged();
Home .this.adapter.getFilter().filter(s);
}
答案 1 :(得分：0)
我建议你使用Filter类来搜索/过滤列表中的任何项目。你需要从EditText的onTextChanged（）API调用该类，并且过滤联系人的逻辑必须写在过滤器类中。 如，
public void onTextChanged(CharSequence s, int start, int before, int count){
//Call filter class
getFilter().filter(s);
}
//getFilter class
public Filter getFilter() {
//put a Null check
if (null == filter) {
//Calling a private filter class, that contains the logic..
filter = new FilterList();
}
return filter;
}
private class FilterList extends Filter {
//Here, I was using a pojo to store the attributes of the List Item
List<DefaultPojo> buffer = new ArrayList<DefaultPojo>();
@Override
protected FilterList performFiltering(CharSequence constraint) {
FilterList results = new FilterList();
if(constraint != null && constraint.toString().length() > 0)
{
if(List != null){
int count = List.size();
ArrayList<DefaultPojo> filt = new ArrayList<DefaultPojo>(count);
if(constraint != null && constraint.toString().length() > 0){
//Logic for searching the list
}
else{
//Load the Parent List....
buffer = List;
}
//Sorting the obtained List..
Collections.sort(buffer);
if(buffer!=null && buffer.size()>0){
results.values = buffer;
results.count = buffer.size(); }
return results;
}
//Setting the content to the List and Adapter will be done by publishResults() method..
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
filteredList = (List<DefaultPojo>)results.values;
if(filteredList!=null){
ListAdapter = new ListAdapter(Contactlist.this,mFilteredContactDetails);
List.setAdapter(ListAdapter);
}
else{
List.setAdapter(null);
ListAdapter=null;
}
}
}
答案 2 :(得分：0)
我认为您无需在搜索后重新初始化adapter。
你可以这样试试。
准备一个ArrayList说tempList＆amp;在第一次使用songsList初始化它。然后在初始化时将tempList传递给适配器。在搜索时，将tempList与searchResults＆amp;只需致电adapter.notifyDataSetChanged()。