这是我尝试过的，但是当我测试搜索框时没有任何显示。
@SuppressLint("NewApi")
public class east extends Fragment {
ListView list;
TextView id;
TextView name;
Button Btngetdata;
east adaptor;
EditText Search;
ArrayList<HashMap<String, String>> oslist = new ArrayList<HashMap<String, String>>();
//URL to get JSON Array
private static String url = "http://YYY.com/s/east.php";
//JSON Node Names
private static final String TAG_ARRAY = "coffee";
private static final String TAG_ID = "ID";
private static final String TAG_NAME = "name";
private static final String TAG_adress = "adress";
private static final String TAG_IMAGE = "image";
JSONArray coffee = null;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.east_fragment, container, false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
if (Connectivity.isConnected(getActivity())){
Toast.makeText(getActivity(), "conected", Toast.LENGTH_SHORT);
}else{
AlertDialog alertDialog1 = new AlertDialog.Builder(getActivity()).create();
// Setting Dialog Title
alertDialog1.setTitle(" error");
// Setting Dialog Message
alertDialog1.setMessage("no connection");
// Setting Icon to Dialog
alertDialog1.setIcon(R.drawable.east);
// Setting OK Button
alertDialog1.setButton("exit", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Write your code here to execute after dialog
// closed
System.exit(0);
}
});
// Showing Alert Message
alertDialog1.show();
}
oslist = new ArrayList<HashMap<String, String>>();
Btngetdata = (Button)getView().findViewById(R.id.getdata);
Btngetdata.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new JSONParse().execute();
Btngetdata.setVisibility(View.GONE);
}
});
}
private class JSONParse extends AsyncTask<String, String, JSONObject> {
private ProgressDialog pDialog;
JsonParser jParser = new JsonParser();
private JSONObject json;
@Override
protected void onPreExecute() {
super.onPreExecute();
name = (TextView)getView().findViewById(R.id.name);
id = (TextView)getView().findViewById(R.id.id);
pDialog = new ProgressDialog(getActivity());
pDialog.setMessage("Getting Data ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected JSONObject doInBackground(String... args) {
// Getting JSON from URL
json = jParser.getJSONFromUrl(url);
return json;
}
@Override
protected void onPostExecute(JSONObject json) {
pDialog.dismiss();
try {
// Getting JSON Array from URL
coffee = json.getJSONArray(TAG_ARRAY);
for(int i = 0; i < coffee.length(); i++){
JSONObject c = coffee.getJSONObject(i);
// Storing JSON item in a Variable
String ID = null;
String name = null;
String adress = null;
String image = null;
try {
ID = new String(c.getString(TAG_ID).getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
name = new String(c.getString(TAG_NAME).getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
adress = new String(c.getString(TAG_adress).getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
image = new String(c.getString(TAG_IMAGE).getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Adding value HashMap key => value
HashMap<String, String> map = new HashMap<String, String>();
map.put(TAG_ID, ID);
map.put(TAG_NAME, name);
map.put(TAG_adress, adress);
map.put(TAG_IMAGE, image);
oslist.add(map);
list = (ListView)getView().findViewById(R.id.listView1);
ListAdapter adapter = new SimpleAdapter(getActivity(), oslist,
R.layout.listview,
new String[] { TAG_ID, TAG_NAME, TAG_adress }, new int[] {
R.id.id, R.id.name, R.id.adress});
list.setAdapter(adapter);
Search = (EditText) getView().findViewById (R.id.wsSearch);
list.setTextFilterEnabled(true);
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)
{
ArrayList<HashMap<String, String>> arrayTemplist = new ArrayList<HashMap<String, String>>();
String searchString = Search.getText().toString();
if(searchString.length()>0)
{
for (int i1 = 1; i1 < oslist.size(); i1++)
{
String currentString = oslist.get(i1).get(east.TAG_NAME);
if (searchString.equalsIgnoreCase(currentString))
{
arrayTemplist.add(oslist.get(i1));
}
}
ListAdapter adapter = new SimpleAdapter(getActivity(), arrayTemplist,
R.layout.listview,
new String[] { TAG_ID, TAG_NAME, TAG_adress }, new int[] {
R.id.id, R.id.name, R.id.adress});
list.setAdapter(adapter);
}
else
{
ListAdapter adapter = new SimpleAdapter(getActivity(), oslist,
R.layout.listview,
new String[] { TAG_ID, TAG_NAME, TAG_adress }, new int[] {
R.id.id, R.id.name, R.id.adress});
list.setAdapter(adapter);
}
}
});
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(getActivity(), SingleItemView.class);
// Pass all data rank
intent.putExtra("rank", oslist.get(+position).get("ID"));
// Pass all data country
intent.putExtra("country", oslist.get(+position).get("name"));
// Pass all data population
intent.putExtra("population", oslist.get(+position).get("adress"));
// Pass all data flag
intent.putExtra("flag", oslist.get(+position).get("image"));
// Start SingleItemView Class
startActivity(intent);
}
});
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
Logcat 是空的，什么也不显示。我无法追踪搜索过程到底出了什么问题。我提前感谢您的帮助。