아래는 사람들의 이름과 전화번호 위치정보(위도,경도)를 받아와서
이름, 전화번호, 나와의 거리를
리스트뷰에 뿌려주는 소스입니다.
모든 것이 잘 작동하는데,
사람이름 순으로 정렬하여 리스트뷰에 나열하는 방법과
거리순으로 정렬하여 리스트뷰에 나열하는 방법에 대하여 고견을 구합니다.
public class MainActivity extends Activity{
ArrayList<HashMap<String, Object>> searchResults;
ArrayList<HashMap<String, Object>> originalValues;
private CustomAdapter adapter;
LayoutInflater inflater;
double x,y;
Timer timer;
LocationManager lm;
boolean gps_enabled = false;
boolean network_enabled = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final EditText searchBox = (EditText) findViewById(R.id.et_search_name);
final ListView insurListView = (ListView) findViewById(android.R.id.list);
inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
String names[] = {
"K",
"J",
"L",
"O",
"S",
};
String calls[] = {
"11111111",
"22222222",
"33333333",
"44444444",
"55555555",
};
Double lati[] = {
35.000001,
26.000001,
67.000001,
15.000001,
79.000001,
};
Double longi[] = {
129.000001,
159.000001,
100.000001,
131.000001,
162.000001,
};
originalValues = new ArrayList<HashMap<String, Object>>();
HashMap<String, Object> temp;
int oriname = names.length;
for (int i = 0; i < oriname; i++) {
temp = new HashMap<String, Object>();
temp.put("name", names[i]);
temp.put("call", calls[i]);
temp.put("lati", lati[i]);
temp.put("longi", longi[i]);
originalValues.add(temp);
}
searchResults = new ArrayList<HashMap<String, Object>>(originalValues);
adapter = new CustomAdapter(this,R.layout.list_row, searchResults);
insurListView.setAdapter(adapter);
searchBox.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
String searchString = searchBox.getText().toString();
int textLength = searchString.length();
searchResults.clear();
for (int i = 0; i < originalValues.size(); i++) {
String insurName = originalValues.get(i).get("name").toString();
if (textLength <= insurName.length()) {
if (searchString.equalsIgnoreCase(insurName.substring(0, textLength)))
searchResults.add(originalValues.get(i));
}
}
adapter.notifyDataSetChanged();
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void afterTextChanged(Editable s) {
}
});
/*gps part*/
lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!gps_enabled && !network_enabled) {
Context context = getApplicationContext();
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, "nothing is enabled", duration);
toast.show();
}
if (gps_enabled)
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,
locationListenerGps);
if (network_enabled)
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0,
locationListenerNetwork);
}
private class CustomAdapter extends ArrayAdapter<HashMap<String, Object>> {
public CustomAdapter(Context context, int textViewResourceId,
ArrayList<HashMap<String, Object>> Strings) {
super(context, textViewResourceId, Strings);
}
private class ViewHolder {
TextView name;
TextView call;
TextView distance;
}
ViewHolder viewHolder;
@Override
public View getView(int position, View convertView, ViewGroup parent) {
double sLat = Double.valueOf(searchResults.get(position).get("lati").toString());
double sLng = Double.valueOf(searchResults.get(position).get("longi").toString());
double eLat = Double.valueOf(x);
double eLng = Double.valueOf(y);
if (x==0){
sLat = 0;
sLng = 0;
}
String distance = SocialUtil.calcDistance(sLat, sLng, eLat, eLng);
if (convertView == null) {
convertView = inflater.inflate(R.layout.list_row, null);
viewHolder = new ViewHolder();
viewHolder.name = (TextView) convertView.findViewById(R.id.name);
viewHolder.call = (TextView) convertView.findViewById(R.id.call);
viewHolder.distance = (TextView) convertView.findViewById(R.id.distance);
convertView.setTag(viewHolder);
} else
viewHolder = (ViewHolder) convertView.getTag();
final int pos = position;
viewHolder.name.setText(searchResults.get(position).get("name").toString());
viewHolder.call.setText(searchResults.get(position).get("call").toString());
viewHolder.distance.setText(distance);
return convertView;
}
}
LocationListener locationListenerGps = new LocationListener() {
public void onLocationChanged(Location location) {
timer.cancel();
x =location.getLatitude();
y = location.getLongitude();
lm.removeUpdates(this);
lm.removeUpdates(locationListenerNetwork);
adapter.notifyDataSetChanged();
Context context = getApplicationContext();
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, "gps enabled "+x + "\n" + y, duration);
toast.show();
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
};
LocationListener locationListenerNetwork = new LocationListener() {
public void onLocationChanged(Location location) {
timer.cancel();
x = location.getLatitude();
y = location.getLongitude();
lm.removeUpdates(this);
lm.removeUpdates(locationListenerGps);
adapter.notifyDataSetChanged();
Context context = getApplicationContext();
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, "network enabled"+x + "\n" + y, duration);
toast.show();
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
};
public static class SocialUtil {
public static String calcDistance(double lat1, double lon1, double lat2, double lon2){
double EARTH_R, Rad, radLat1, radLat2, radDist;
double distance, ret;
EARTH_R = 6371000.0;
Rad = Math.PI/180;
radLat1 = Rad * lat1;
radLat2 = Rad * lat2;
radDist = Rad * (lon1 - lon2);
distance = Math.sin(radLat1) * Math.sin(radLat2);
distance = distance + Math.cos(radLat1) * Math.cos(radLat2) * Math.cos(radDist);
ret = EARTH_R * Math.acos(distance);
double rslt = Math.round(Math.round(ret) / 1000);
String result = rslt + " km";
if(rslt == 0) result = Math.round(ret) +" m";
return result;
}
}
}
