Question

我想创建一个AutoCompleteTextView，用户可以在其中输入邮政编码或城市名称，但只有城市名称应出现在建议信息中下来。

我使用AsyncTask获取Church List，我使用HashMap存储城市名称和邮政编码。

异步类：

    // Asynchronous Class for Fetching All Church.
public class FetchAllChurch extends AsyncTask<String, String, String> {

    Boolean isJsonObjectNull = false;
    HashMap<String, String> cityZipHashMap;

    @Override
    protected void onPreExecute() {
        // TODO Auto-generated method stub
        super.onPreExecute();

        progressDialog = new ProgressDialog(Search.this);
        progressDialog.setMessage("Loading Cities...");
        progressDialog.setCancelable(true);
        progressDialog.show();
    }

    @Override
    protected String doInBackground(String... params) {
        // TODO Auto-generated method stub
        jsonParser = new JsonParser();
        JSONObject jsonObject = jsonParser
                .makeHttpRequest(Utility.GET_ALL_CHURCH_URL);
        if (jsonObject != null) {
            Log.v("All Church: ", jsonObject.toString());
            try {
                JSONArray jsonArray = jsonObject
                        .getJSONArray(Utility.SEARCH_RESULT);

                for (int i = 0; i < jsonArray.length(); i++) {
                    JSONObject churchJsonObject = jsonArray
                            .getJSONObject(i);


                    String ePostalString = churchJsonObject
                            .getString(Utility.E_POSTAL);
                    String eZipCodeFullString = churchJsonObject
                            .getString(Utility.E_ZIP_FULL);
                    String eCityString = churchJsonObject
                            .getString(Utility.E_CITY);

                    cityZipHashMap = new HashMap<String, String>();
                    cityZipHashMap.put("city", eCityString);
                    cityZipHashMap.put("zip", ePostalString);
                    cityZipArrayList.add(cityZipHashMap);

                    }

                // }
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return null;
    }

    @Override
    protected void onPostExecute(String result) {
        // TODO Auto-generated method stub
        super.onPostExecute(result);

        progressDialog.dismiss();

            AutoCompleteAdapter adapter = new AutoCompleteAdapter(
                    getApplicationContext(), android.R.layout.simple_list_item_1, cityZipArrayList);
            searchAutoCompleteTextView.setAdapter(adapter);
        }

适配器：

这是适配器：

import java.util.ArrayList;
import java.util.HashMap;

import android.content.Context;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.Filterable;

public class AutoCompleteAdapter extends ArrayAdapter<String>
    implements Filterable {
private ArrayList<HashMap<String, String>> mData;

public AutoCompleteAdapter(Context context, int textViewResourceId,
        ArrayList<HashMap<String, String>> mData) {
    super(context, textViewResourceId);
    this.mData = mData;
}

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

@Override
public String getItem(int index) {
    return mData.get(index).toString();
}

@Override
public android.widget.Filter getFilter() {
    // TODO Auto-generated method stub

    android.widget.Filter filter = new android.widget.Filter() {

        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            // TODO Auto-generated method stub

            FilterResults filterResults = new FilterResults();
            if (constraint != null) {
                // A class that queries a web API, parses the data and
                // returns an ArrayList<Style>
                ArrayList<String> suggestion = new ArrayList<String>();
                for (int i = 0; i < getCount(); i++) {
                    if (getItem(i).startsWith(
                            constraint.toString())) {
                        suggestion.add(getItem(i));

                        Log.v("Adapter: ", getItem(i)
                                + "const" +constraint.toString());
                    }
                }

                // Now assign the values and count to the FilterResults
                // object
                filterResults.values = suggestion;

                filterResults.count = suggestion.size();
            }
            return filterResults;
        }

        @Override
        protected void publishResults(CharSequence constraint,
                FilterResults results) {
            // TODO Auto-generated method stub

            clear();
            @SuppressWarnings("unchecked")
            ArrayList<String> newValues = (ArrayList<String>) results.values;
            for (int i = 0; i < newValues.size(); i++) {
                add(newValues.get(i));

            }

            if (results != null && results.count > 0) {
                notifyDataSetChanged();
            } else {
                notifyDataSetInvalidated();
            }
        }

    };
    return filter;
}

}

我没有得到预期的结果提前谢谢。

Answer 1

请尝试这种方式，希望这有助于您解决问题。

<强> main.xml中

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center"
    android:padding="5dp">

    <AutoCompleteTextView
        android:id="@+id/autoComplete"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>

<强> MyActivity.java

public class MyActivity extends Activity {

    private AutoCompleteTextView autoComplete;
    ArrayList<HashMap<String,String>> cityZipList;
    ArrayList<HashMap<String,String>> autoCompleteList;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

         cityZipList = new ArrayList<HashMap<String, String>>();

        HashMap<String,String> row1 = new HashMap<String, String>();
        row1.put("city","AAC");
        row1.put("zip", "123");
        cityZipList.add(row1);

        HashMap<String,String> row2 = new HashMap<String, String>();
        row2.put("city","AAD");
        row2.put("zip", "231");
        cityZipList.add(row2);

        HashMap<String,String> row3 = new HashMap<String, String>();
        row3.put("city","EFG");
        row3.put("zip", "125");
        cityZipList.add(row3);

        HashMap<String,String> row4 = new HashMap<String, String>();
        row4.put("city","AAL");
        row4.put("zip", "334");
        cityZipList.add(row4);

        HashMap<String,String> row5 = new HashMap<String, String>();
        row5.put("city","EFD");
        row5.put("zip", "235");
        cityZipList.add(row5);

        HashMap<String,String> row6 = new HashMap<String, String>();
        row6.put("city","JKL");
        row6.put("zip", "333");
        cityZipList.add(row6);

        HashMap<String,String> row7 = new HashMap<String, String>();
        row7.put("city","JKM");
        row7.put("zip", "521");
        cityZipList.add(row7);

        HashMap<String,String> row8 = new HashMap<String, String>();
        row8.put("city","AAN");
        row8.put("zip","527");
        cityZipList.add(row8);

        autoComplete = (AutoCompleteTextView) findViewById(R.id.autoComplete);
        autoComplete.setAdapter(new AutoCompleteAdapter(this,R.layout.auto_item, cityZipList));

    }

    private class AutoCompleteAdapter extends ArrayAdapter<String> implements Filterable {


        public AutoCompleteAdapter(Context context, int textViewResourceId,ArrayList<HashMap<String,String>> data) {
            super(context, textViewResourceId);
        }

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

        @Override
        public String getItem(int position) {
            return autoCompleteList.get(position).get("city");
        }

        @Override
        public Filter getFilter() {
            Filter filter = new Filter() {
                @Override
                protected FilterResults performFiltering(final CharSequence constraint) {
                    FilterResults filterResults = new FilterResults();
                    if (constraint != null) {

                       autoCompleteList = new ArrayList<HashMap<String, String>>();
                        for (int i = 0; i < cityZipList.size(); i++) {
                            if (cityZipList.get(i).get("city").startsWith(
                                    constraint.toString()) || cityZipList.get(i).get("zip").startsWith(
                                    constraint.toString())) {
                                autoCompleteList.add(cityZipList.get(i));
                            }
                        }

                        // Now assign the values and count to the FilterResults
                        // object
                        filterResults.values = autoCompleteList;

                        filterResults.count = autoCompleteList.size();
                    }
                    return filterResults;
                }

                @Override
                protected void publishResults(CharSequence constraint, FilterResults results) {
                    if (results != null && results.count > 0) {
                        notifyDataSetChanged();
                    } else {
                        notifyDataSetInvalidated();
                    }
                }
            };
            return filter;
        }
    }

}

Answer 2

使用我在代码中使用的自定义适配器。我已经使用了这个带有哈希映射的适配器。

SERIALIZABLE

如何从HashMap绑定AutoCompleteTextView

2 个答案: