I created an app composed of google map and listview of places. The data of places is in the SQLite together with the latitude and longitude. I decided to add a button wherein if the user clicks it, nearby location will appear based on the location of the user in listview and it will replace the previous listview and the markers will appear in the map. I dont have an idea how to display the nearby location once I click a button. In my project, all the list of places already displays in the listview and once the users selects in the list, map will automatically get the latitude of longitude. Please help me.
public class MainActivity extends AppCompatActivity implements LocationListener {
GoogleMap map;
List<LocationModel> GetLocation;
Context context = this;
DatabaseHelper dbhelper;
DatabaseHelper db = new DatabaseHelper(this);
ListView lv;
View yourListView,yourProfileView;
Button buttonnearby;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
dbhelper = new DatabaseHelper(MainActivity.this);
buttonnearby = (Button) findViewById(R.id.button);
buttonnearby.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View convertView) {
}
});
try{
dbhelper.createDataBase();
}
catch(IOException e){
e.printStackTrace();
}
try {
dbhelper.openDataBase();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
GetLocation = dbhelper.getLocation();
lv = (ListView) findViewById(R.id.listView);
lv.setAdapter(new ViewAdapter());
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
LatLng latlngtofocus = new LatLng(Double.parseDouble(GetLocation.get(i).getlatitude()), Double.parseDouble(GetLocation.get(i).getlongitude()));
map.animateCamera(CameraUpdateFactory.newLatLngZoom(latlngtofocus, 17.0f));
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latlngtofocus);
//adding marker to the map
map.addMarker(markerOptions);
yourListView = findViewById(R.id.layout);
ViewGroup parent = (ViewGroup) yourListView.getParent();
parent.removeView(yourListView);
// inflate your profile view (or get the reference to it if it's already inflated)
yourProfileView = getLayoutInflater().inflate(R.layout.profile_location, parent, false);
// add it to the parent
parent.addView(yourProfileView);
}
});
//To get MapFragment reference from xml layout
MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
//To get map object
map = mapFragment.getMap();
map.getUiSettings().setZoomControlsEnabled(true);
/* //to show current location in the map
map.setMyLocationEnabled(true);
map.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
@Override
public void onMapClick(LatLng latLng) {
Toast.makeText(getApplicationContext(), latLng.toString(), Toast.LENGTH_LONG).show();
}
});*/
//To setup location manager
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
//To request location updates
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1, 1, this);
}
@Override
public void onLocationChanged(Location location) {
//To clear map data
map.clear();
//To hold location
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
//To create marker in map
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("My Location");
//adding marker to the map
map.addMarker(markerOptions);
//opening position with some zoom level in the map
map.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 17.0f));
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
/****************************************************************************************
* CUSTOM LIST
****************************************************************************************/
public class ViewAdapter extends BaseAdapter {
LayoutInflater mInflater;
public ViewAdapter() {
mInflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
return GetLocation.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = mInflater.inflate(R.layout.item_location,null);
}
final TextView place = (TextView) convertView.findViewById(R.id.location);
final TextView latitude = (TextView) convertView.findViewById(R.id.latitude);
final TextView longitude = (TextView) convertView.findViewById(R.id.longitude);
location.setText(GetLocation.get(position).getlocation());
latitude.setText(GetLocation.get(position).getlatitude());
longitude.setText(GetLocation.get(position).getlongitude());
return convertView;
}
}
@Override
public void onBackPressed() {
if(yourProfileView != null && yourProfileView.getParent() != null) {
// remove your profile view
ViewGroup parent = (ViewGroup) yourProfileView.getParent();
parent.removeView(yourProfileView);
// a reference to yourListView has to be saved somewhere; just get it
// add your listview to the parent
parent.addView(yourListView);
} else {
super.onBackPressed();
}
}
}
DatabaseHelper
public List<LocationModel> getLocation() {
List<LocationModel> lList = new ArrayList<LocationModel>();
{
String selectQuery =
"SELECT id,location,latitude,longitude FROM places ";
Log.e("places query: ", selectQuery);
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
LocationModel lm = new LocationModel();
lm.setid(Integer.parseInt(cursor.getString(0)));
lm.setlocation(cursor.getString(1));
lm.setlatitude(cursor.getString(2));
lm.setlongitude(cursor.getString(3));
lList.add(lm);
} while (cursor.moveToNext());
}
db.close();
}
return lList;
}
}
