fazilpuriasa fazilpuriasa - 11 days ago 5
JSON Question

How to implement autocompletetextview with listview?

I am getting response from server and display it using listview and it works fine,now what I am trying is i added autocompletetextview to search items by name,but when i run my app it crashes and showing errors..i already ask this

Tab1Activity.java

public class Tab1Activity extends ListActivity{


private ProgressDialog pDialog;
JSONArray Product=null;
private ListView listview;
ArrayList<HashMap<String,String>> aList;

ArrayList<HashMap<String, String>> arrayTemplist;
private static String PRODUCT_URL = "";
private static final String PRODUCT_DATA="Product";
private static final String PRODUCT_ID="productid";
private static final String PRODUCT_NAME="product_name";
private static final String PRODUCT_CODE="skucode";
private static final String PRODUCT_IMAGE="product_photo";
private static final String PRODUCT_WEIGHT="weight";
private static final String PRODUCT_SALERATE="sale_rate";
//private static final String PRODUCT_LOCATION="weight";
private CustomAdapterTabone adapter;
private TextView noacpt;
private AutoCompleteTextView inputSearch;

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.list_view_tabone);
//noacpt=(TextView)findViewById(R.id.no_acceptedlist);
/*String strtext = getIntent().getStringExtra("id");
System.out.println("<<<<<<<< id : " + strtext);*/

final ListView listview = (ListView)findViewById(android.R.id.list);
//listview.setSelector( R.drawable.list_selector);

//listview.setSelector(R.drawable.listselector);
new LoadAlbums().execute();

aList = new ArrayList<HashMap<String, String>>();
final ListView lv = getListView();

inputSearch = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);

inputSearch.addTextChangedListener(new TextWatcher() {


@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {

arrayTemplist= new ArrayList<HashMap<String,String>>();
String searchString =inputSearch.getText().toString().toLowerCase();

for (int i = 0; i < aList.size(); i++)
{
String currentString =aList.get(i).get(Tab1Activity.PRODUCT_NAME);
if (currentString.toLowerCase().startsWith(searchString ))
{
arrayTemplist.add(aList.get(i));
}
}

for (int i = 0; i < arrayTemplist.size(); i++)
{
String currentstrin = arrayTemplist.get(i).get(Tab1Activity.PRODUCT_NAME);
//Toast.makeText(getApplicationContext(), currentstrin, Toast.LENGTH_LONG).show();

}

adapter=new CustomAdapterTabone(getApplicationContext(), arrayTemplist);
listview.setAdapter(adapter);

/* SimpleAdapter adapters = new SimpleAdapter(Tab1Activity.this, arrayTemplist,R.layout.list_item_tabone, new String[] { PRODUCT_NAME
}, new int[] {
R.id.txtpronameacptedlist});
lv.setAdapter(adapters);
*/
}

@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub

}

@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
});


}

@Override
public void onListItemClick(ListView l, View v, int position, long id) {
Intent intent = new Intent(getApplicationContext(), AllProductDetails.class);
intent.putExtra("productid", aList.get(position).get(PRODUCT_ID));
startActivity(intent);
}

class LoadAlbums extends AsyncTask<String, String, ArrayList<HashMap<String,String>>> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Tab1Activity.this);
pDialog.setMessage("Loading...");
pDialog.setIndeterminate(true);
// pDialog.setIndeterminateDrawable(getResources().getDrawable(R.drawable.custom_progress));
pDialog.setCancelable(false);
pDialog.show();
}
protected ArrayList<HashMap<String,String>> doInBackground(String... args) {
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
ArrayList<HashMap<String,String>> data = new ArrayList<HashMap<String, String>>();
String jsonStr = sh.makeServiceCall(PRODUCT_URL, ServiceHandler.GET);

Log.d("Response: ", "> " + jsonStr);

if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);

// Getting JSON Array node
Product = jsonObj.getJSONArray(PRODUCT_DATA);

for (int i = 0; i < Product.length(); i++) {
JSONObject c = Product.getJSONObject(i);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(PRODUCT_ID, c.getString(PRODUCT_ID));
map.put(PRODUCT_NAME,c.getString(PRODUCT_NAME));
map.put(PRODUCT_CODE, c.getString(PRODUCT_CODE));
map.put(PRODUCT_IMAGE, c.getString(PRODUCT_IMAGE));
map.put(PRODUCT_WEIGHT, c.getString(PRODUCT_WEIGHT));
map.put(PRODUCT_SALERATE, c.getString(PRODUCT_SALERATE)+getResources().getString(R.string.rupee));
// map.put(INTEREST_ACCEPT_LOCATION, c.getString(INTEREST_ACCEPT_LOCATION));
// adding HashList to ArrayList
data.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return data;
}
protected void onPostExecute(ArrayList<HashMap<String,String>> result) {
super.onPostExecute(result);

// dismiss the dialog after getting all albums
if (pDialog.isShowing())
pDialog.dismiss();
// updating UI from Background Thread

aList = new ArrayList<HashMap<String, String>>();
aList.addAll(result);
adapter = new CustomAdapterTabone(getApplicationContext(),result);
setListAdapter(adapter);

aList.addAll(result);
adapter.notifyDataSetChanged();



}


}

CustomAdapter

public class CustomAdapterTabone extends BaseAdapter{


private Context context;
private ArrayList<HashMap<String,String>> listData;
private AQuery aQuery;

private static final String TAG_NAME="product_name";
private static final String TAG_PROFILE="skucode";
private static final String TAG_IMAGE="product_photo";
private static final String TAG_CAST="weight";
private static final String TAG_AGE="sale_rate";
// private static final String TAG_LOCATION="weight";

public CustomAdapterTabone(Context context,ArrayList<HashMap<String,String>> listData) {
this.context = context;
this.listData=listData;
aQuery = new AQuery(this.context);
}

@Override
public int getCount() {
return listData.size();
}

@Override
public Object getItem(int position) {
return listData.get(position);
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = LayoutInflater.from(context).inflate(R.layout.list_item_tabone, null);
holder.propic = (ImageView) convertView.findViewById(R.id.propicaccept);
holder.txtproname = (TextView) convertView.findViewById(R.id.txtpronameacptedlist);
holder.txtproid = (TextView) convertView.findViewById(R.id.txtproidacptedlist);
holder.txtprofilecast = (TextView) convertView.findViewById(R.id.txtprofilecastacptedlist);
holder.txtprofileage = (TextView) convertView.findViewById(R.id.txtprofileageacptedlist);
// holder.txtprofileplace = (TextView) convertView.findViewById(R.id.txtprofileplaceacptedlist);
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
}

holder.txtproname.setText(listData.get(position).get(TAG_NAME));
holder.txtproid.setText(listData.get(position).get(TAG_PROFILE));
holder.txtprofilecast.setText(listData.get(position).get(TAG_CAST));
holder.txtprofileage.setText(listData.get(position).get(TAG_AGE));
//holder.txtprofileplace.setText(listData.get(position).get(TAG_LOCATION));

aQuery.id(holder.propic).image(listData.get(position).get(TAG_IMAGE),true,true,0,R.drawable.ic_launcher);
// image parameter : 1 : memory cache,2:file cache,3:target width,4:fallback image
return convertView;
}
class ViewHolder{
ImageView propic;
TextView txtproname;
TextView txtproid;
TextView txtprofilecast;
TextView txtprofileage;
TextView txtprofileplace;
}
}

Answer

First create a custom adapter implements filterable:

public class MyFilterableAdapter extends BaseAdapter implements Filterable {
    private Context context;
    private List<String> items;
    private List<String> filteredItems;
    private ItemFilter mFilter = new ItemFilter();

    public MyFilterableAdapter(Context context, List<String> items) {
        //super(context, R.layout.your_row, items);
        this.context = context;
        this.items = items;
        this.filteredItems = items;
    }

    @Override
    public int getCount() {
        return filteredItems.size();
    }

    @Override
    public Object getItem(int position) {
        return filteredItems.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder;

        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            convertView = inflater.inflate(R.layout.row_search_merchant, parent, false);
            viewHolder = new ViewHolder();
            viewHolder.tvTitle = (TextView) convertView.findViewById(R.id.tv_title);
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }

        String location = filteredItems.get(position);
        if (!location.isEmpty() || viewHolder != null) {
            viewHolder.tvTitle.setText(location);
        }
        return convertView;
    }

    public static class ViewHolder {
        TextView tvTitle;
    }

    private class ItemFilter extends Filter {
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            String filterString = constraint.toString().toLowerCase();
            FilterResults results = new FilterResults();

            int count = items.size();
            final List<String> tempItems = new ArrayList<>(count);

            for (int i = 0; i < count; i++) {
                if (items.get(i).toLowerCase().contains(filterString)) {
                    tempItems.add(items.get(i));
                }
            }

            results.values = tempItems;
            results.count = tempItems.size();

            return results;
        }

        @SuppressWarnings("unchecked")
        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            filteredItems = (ArrayList<String>) results.values;
            notifyDataSetChanged();
        }
    }

    public Filter getFilter() {
        return mFilter;
    }
}

And than create a textwatcher

public class MyTextWatcher implements TextWatcher {
    private MyCustomAdapter lAdapter;

    public MyTextWatcher(MyCustomAdapter lAdapter) {
        this.lAdapter = lAdapter;
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {

    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {

    }

    @Override
    public void afterTextChanged(Editable s) {
        lAdapter.getFilter().filter(s.toString().toLowerCase());
    }
}

And finally add your TextWatcher to your Search Edit Text:

final MyCustomAdapter lAdapter = new MyCustomAdapter(context, items);
EditText etSearch = (EditText) view.findViewById(R.id.et_search);
        etSearch.addTextChangedListener(new SearchTextWatcher(lAdapter));

I hope this'll help you.

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