Help with my code, please, setMyLocationEnabled(true) gives an error.
The program closes when running, and I can not find the solution :(
MainActivity.java File:
public class MainActivity extends Activity {
Button btnDireccion;
TextView lblDireccion;
public static double lat = 0;
public static double lon = 0;
public static boolean checked = false; //Se ha chequeado el mapa.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
btnDireccion = (Button)findViewById(R.id.btnDireccion);
lblDireccion = (TextView)findViewById(R.id.lblDireccion);
}
public void mostrarMapa(View view){
Intent pantalla = new Intent(this, SeleccionarDireccion.class);
startActivity(pantalla);
}}
SeleccionarDireccion.java
public class SeleccionarDireccion extends AppCompatActivity {
private LatLng latlong = new LatLng (-6.760644,-79.863413);
private GoogleMap map;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_seleccionar_direccion);
MapFragment fMap = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
map.setMyLocationEnabled(true);
map = fMap.getMap();
map.setOnMapLongClickListener(new GoogleMap.OnMapLongClickListener() {
public void onMapLongClick(LatLng LL) {
MainActivity.lat = LL.latitude;
MainActivity.lon = LL.longitude;
regresar();
}
});
MainActivity.checked = true;
if (map!=null){
iniciarGPS();
}
}
private void iniciarGPS(){
map.addMarker(new MarkerOptions().position(latlong)
.title("Ubicacion actual"));
map.moveCamera(CameraUpdateFactory.newLatLngZoom(latlong,15));
}
public void regresar() {
Intent intent = new Intent(this, MainActivity.class);
intent .setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
startActivity(intent);
this.finish();
} }
activity_seleccionar_direccion.xml
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/map"
tools:context="com.androidmorefast.moden.appcapturardireccion.SeleccionarDireccion"
android:name="com.google.android.gms.maps.MapFragment" />
Activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.androidmorefast.moden.appcapturardireccion.MainActivity">
<LinearLayout
android:id="#+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="150dp"
android:orientation="vertical" >
<Button
android:id="#+id/btnDireccion"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Dirección"
android:onClick="mostrarMapa" />
<TextView
android:id="#+id/lblDireccion"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:text=" "
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
</LinearLayout>
</RelativeLayout>
The getMap method is deprecated and in your case is returning null, so the line map.setMyLocationEnabled(true); is throwing NullPointerException. You should use getMapAsync:
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
#Override
protected void onCreate(Bundle savedInstanceState) {
// ...
MapFragment fMap = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
fmap.getMapAsync(this);
}
#Override
public void onMapReady(final GoogleMap googleMap) {
map = googleMap;
map.setMyLocationEnabled(true);
map.setOnMapLongClickListener(new GoogleMap.OnMapLongClickListener() {
public void onMapLongClick(LatLng LL) {
MainActivity.lat = LL.latitude;
MainActivity.lon = LL.longitude;
regresar();
}
});
iniciarGPS();
}
}
Related
I'm developing an app using Android sdk version 29. I want to add Google Maps in one of my Fragments Activity but its not working and i couldnt fix it.
fradment_map.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.jHumildes.beautyappointment.Fragments.MapFragment">
<fragment
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/mapAPI"
android:name="com.google.android.gms.maps.SupportMapFragment"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
MapFragment.java
public class MapFragment extends Fragment implements OnMapReadyCallback {
GoogleMap mapAPI;
SupportMapFragment mapFragment;
public MapFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_map, container, false);
return view;
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SupportMapFragment mapFragment = (SupportMapFragment) getChildFragmentManager()
.findFragmentById(R.id.mapAPI);
mapFragment.getMapAsync(this);
}
#Override
public void onMapReady(GoogleMap googleMap) {
mapAPI = googleMap;
LatLng Dublin = new LatLng(53.3581716, -6.2595678);
mapAPI.addMarker(new MarkerOptions().position(Dublin).title("Dublin"));
mapAPI.moveCamera(CameraUpdateFactory.newLatLng(Dublin));
}
}
I have implemented the libraries and also added uses-permissions in manifest.
implementation 'com.google.android.gms:play-services-maps:11.0.4'
implementation 'com.google.maps.android:android-maps-utils:0.4+'
...
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="AIzaSyDI-Hx6qi9dEkuGZL_c2sMMg-Cm2wd7wNg" />
</application>
map fragment
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
tools:layout_editor_absoluteX="58dp"
tools:layout_editor_absoluteY="257dp" />
map class:
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFragment.onCreate(savedInstanceState);
mapFragment.onResume();
try {
MapsInitializer.initialize(getApplicationContext());
} catch (Exception e) {
e.printStackTrace();
}
mapFragment.getMapAsync(new OnMapReadyCallback() {
#Override
public void onMapReady(GoogleMap mMap) {
googleMap = mMap;
googleMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
public void onMapClick(LatLng point) {
// Drawing marker on the map
}
});
googleMap.setOnInfoWindowClickListener(new GoogleMap.OnInfoWindowClickListener() {
#Override
public void onInfoWindowClick(Marker marker) {
// TODO Auto-generated method stub
}
});
googleMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() {
#Override
public boolean onMarkerClick(final Marker marker) {
DetailData(String.valueOf(marker.getTag()));
tag = String.valueOf(marker.getTag());
name = marker.getTitle();
return false;
}
});
}
});
In my application i set one image in my layout center of map, and i want when drag googleMap show latLong of this image (marker).
layout code:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
android:id="#+id/mainToolbar"
layout="#layout/toolbar_main" />
<fragment
android:id="#+id/mainMap"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/mainToolbar"
tools:context="com.tida.utils.safine.Activities.MainActivity" />
<ImageView
android:id="#+id/location_setter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:src="#drawable/ic_location_origin_pin" />
</RelativeLayout>
Java code:
public class MainActivity extends FragmentActivity implements OnMapReadyCallback {
private GoogleMap mMap;
private UiSettings mUiSettings;
private CameraUpdate mapCenter, mapZoom;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.mainMap);
mapFragment.getMapAsync(this);
}
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mUiSettings = mMap.getUiSettings();
mUiSettings.setScrollGesturesEnabled(true);
mUiSettings.setZoomGesturesEnabled(true);
mUiSettings.setTiltGesturesEnabled(true);
mUiSettings.setRotateGesturesEnabled(true);
/*Set center of Tehran location*/
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(35.724414, 51.427059), 18.0f));
/*Map listener*/
mMap.setOnMarkerDragListener(new GoogleMap.OnMarkerDragListener() {
#Override
public void onMarkerDragStart(Marker marker) {
Log.e("mapDrag", "DragStart : " + marker.getPosition());
}
#Override
public void onMarkerDrag(Marker marker) {
Log.e("mapDrag", "Drag : " + marker.getPosition());
}
#Override
public void onMarkerDragEnd(Marker marker) {
Log.e("mapDrag", "DragEnd : " + marker.getPosition());
}
});
}
}
How can i set my image for marker and get this position ?
marker.getPosition() returns LatLng
you should use:
marker.getPosition().latitude
&
marker.getPosition().longitude
set marker using global variable of marker and call mMarker.setPosition(marker.getPosition());
I am trying to implement "Swipe to load more" method in my application but I got that error when I swipe down in the first time. This is what it showed in the console:
E/SwipeRefreshLayout: Got ACTION_MOVE event but don't have an active
pointer id. E/SwipeRefreshLayout: Got ACTION_MOVE event but don't have
an active pointer id. E/SwipeRefreshLayout: Got ACTION_MOVE event but
don't have an active pointer id. E/SwipeRefreshLayout: Got ACTION_MOVE
event but don't have an active pointer id.
This is my layout code:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="training.com.chatgcmapplication.ChatActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.SwipeRefreshLayout
android:id="#+id/swipeLayout"
android:layout_width="match_parent"
android:layout_height="380dp">
<ListView
android:id="#+id/listMessage"
android:layout_width="match_parent"
android:layout_height="380dp"
android:layout_alignParentLeft="false"
android:layout_alignParentTop="false"
android:divider="#null"
android:listSelector="#android:color/transparent"
android:stackFromBottom="true"
android:transcriptMode="alwaysScroll" />
</android.support.v4.widget.SwipeRefreshLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:weightSum="1">
<EditText
android:id="#+id/txt_chat"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.92"
android:inputType="text" />
<Button
android:id="#+id/btn_send"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginLeft="30dp"
android:text="#string/btn_send" />
</LinearLayout>
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
And when I swipe in the second time: it load double data.
This is ChatActivity, what implement that method:
public class ChatActivity extends AppCompatActivity implements View.OnClickListener, SwipeRefreshLayout.OnRefreshListener {
private static EditText txt_chat;
private String registId;
private String chatTitle;
private MessageSender mgsSender;
private int userId;
private DatabaseHelper databaseHelper;
private TimeUtil timeUtil;
private MessageAdapter messageAdapter;
private int offsetNumber = 5;
private SwipeRefreshLayout swipeRefreshLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
if (getSupportActionBar() != null) {
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
Button btn_send = (Button) findViewById(R.id.btn_send);
txt_chat = (EditText) findViewById(R.id.txt_chat);
swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeLayout);
swipeRefreshLayout.setOnRefreshListener(this);
ListView lv_message = (ListView) findViewById(R.id.listMessage);
timeUtil = new TimeUtil();
databaseHelper = DatabaseHelper.getInstance(getApplicationContext());
btn_send.setOnClickListener(this);
Bundle bundle = getIntent().getExtras();
chatTitle = bundle.getString("titleName");
if (getIntent().getBundleExtra("INFO") != null) {
chatTitle = getIntent().getBundleExtra("INFO").getString("name");
this.setTitle(chatTitle);
} else {
this.setTitle(chatTitle);
}
registId = bundle.getString("regId");
userId = databaseHelper.getUser(chatTitle).getUserId();
List<Message> messages = databaseHelper.getLastTenMessages(AppConfig.USER_ID, databaseHelper.getUser(chatTitle).getUserId(), 0);
messageAdapter = new MessageAdapter(getApplicationContext(), R.layout.chat_item, (ArrayList<Message>) messages);
LocalBroadcastManager.getInstance(this).registerReceiver(onNotice, new IntentFilter("Msg"));
if (messages.size() > 0) lv_message.setAdapter(messageAdapter);
}
private BroadcastReceiver onNotice = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String message = intent.getStringExtra("message");
try {
Message messageObj = new Message();
messageObj.setMessage(message);
messageObj.setUserId(userId);
messageObj.setSender_id(AppConfig.USER_ID);
messageObj.setExpiresTime(timeUtil.formatDateTime(timeUtil.getCurrentTime()));
messageAdapter.add(messageObj);
} catch (ParseException e) {
e.printStackTrace();
}
messageAdapter.notifyDataSetChanged();
}
};
#Override
public void onBackPressed() {
super.onBackPressed();
finish();
}
#Override
protected void onDestroy() {
LocalBroadcastManager.getInstance(this).unregisterReceiver(onNotice);
super.onDestroy();
}
private static MessageSenderContent createMegContent(String regId, String title) {
String message = txt_chat.getText().toString();
MessageSenderContent mgsContent = new MessageSenderContent();
mgsContent.addRegId(regId);
mgsContent.createData(title, message);
return mgsContent;
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_send:
String message = txt_chat.getText().toString();
databaseHelper = DatabaseHelper.getInstance(getApplicationContext());
mgsSender = new MessageSender();
new AsyncTask<Void, Void, Void>() {
#Override
protected Void doInBackground(Void... params) {
MessageSenderContent mgsContent = createMegContent(registId, AppConfig.USER_NAME);
mgsSender.sendPost(mgsContent);
return null;
}
}.execute();
databaseHelper.addMessage(message, timeUtil.getCurrentTime(), userId, AppConfig.USER_ID);
txt_chat.setText("");
try {
Message messageObj = new Message();
messageObj.setMessage(message);
messageObj.setUserId(AppConfig.USER_ID);
messageObj.setSender_id(userId);
messageObj.setExpiresTime(timeUtil.formatDateTime(timeUtil.getCurrentTime()));
messageAdapter.add(messageObj);
} catch (ParseException e) {
e.printStackTrace();
}
messageAdapter.notifyDataSetChanged();
break;
}
}
#Override
public void onRefresh() {
swipeRefreshLayout.setRefreshing(true);
List<Message> messages = databaseHelper.getLastTenMessages(AppConfig.USER_ID, databaseHelper.getUser(chatTitle).getUserId(), offsetNumber);
messageAdapter.insertToTheFirst(messages);
messageAdapter.notifyDataSetChanged();
offsetNumber += 5;
Log.i("Offset number", offsetNumber + "");
swipeRefreshLayout.setRefreshing(false);
}
}
UPDATE ISSUE's REASON
I found the reason of that issue. It due to I force the listview scroll to the bottom when it init with this code :
android:stackFromBottom="true"
I replace that code with this but still have same issue:
lv_message.post(new Runnable() {
#Override
public void run() {
lv_message.setSelection(lv_message.getCount() -1);
}
});
I think the problem is , You are trying to show , dismiss and refresh swipeRefreshLayout inside the same method i.e onRefresh().
Make seperate methods for showing and dismissing dialog and invoke them from the place where they are required as I have done below:
#Override
public void onRefresh() {
// refresh code here.
}
#Override
public void showDialog() {
swipeRef.post(new Runnable() {
#Override
public void run() {
if(swipeRef != null)
swipeRef.setRefreshing(true);
}
});
}
#Override
public void dismissDialog() {
if(swipeRef!=null && swipeRef.isShown() )
swipeRef.setRefreshing(false);
}
Started working with Android Studio, trying to display a Google Map in a fragment. The maps displays fine and I'm able to zoom/move the map around, but my markers will not display.
Here is my MapsActivity (HomePageMapsActivity.java):
public class HomePageMapsActivity extends FragmentActivity {
private GoogleMap mMap; // Might be null if Google Play services APK is not available.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_page_maps);
setUpMapIfNeeded();
}
#Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
}
/**
* Sets up the map if it is possible to do so, and the map has not already been instantiated.
* If not installed {#link SupportMapFragment} (and
* {#link com.google.android.gms.maps.MapView MapView}) will prompt user to
* install/update the Google Play services APK on their device.
*/
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
/**
* This is where we can add markers, lines, listeners, or move the camera.
* Only call once and when sure {#link #mMap} is not null.
*/
private void setUpMap() {
mMap.addMarker(new MarkerOptions().position(new LatLng(33, -84)).title("Atlanta"));
}
}
The xml (activity_home_page_maps.xml):
<?xml version="1.0" encoding="utf-8"?>
<fragment
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/map"
class="com.google.android.gms.maps.SupportMapFragment"
tools:context="net.datanetics.campusresponseapp.HomePageMapsActivity" />
The home page xml (activity_home_page):
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<fragment
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/HomePageMap"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="9"
tools:context=".HomePageMapsActivity"
class="com.google.android.gms.maps.SupportMapFragment" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal"
android:weightSum="1" >
<Button
android:id="#+id/MenuButton"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:background="#3498DB"
android:text="Menu"
android:textColor="#FFFFFF" />
<Button
android:id="#+id/EmergencyButton"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:background="#C1392B"
android:text="Emergency"
android:textColor="#FFFFFF" />
</LinearLayout>
Are you sure, your GoogleMap is not null? Try to get map asynchronously:
public class YourActivity extends AppCompatActivity implements OnMapReadyCallback {
private GoogleMap mMap;
SupportMapFragment fragMap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_page_maps);
fragMap = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
fragMap.getMapAsync(this);
}
#Override
public void onMapReady(final GoogleMap map) {
if (map != null) {
mMap = map;
setUpMap();
}
}
}
Two things:
1) You are trying to use the map too early. You need to have the view
first, so your code should be in onCreateView() not onCreate().
Correction: onCreateView() applies to fragments, not activities.
The app I used to test this used a Fragment to hold the map, not a
FragmentActivity.
2) I found I needed to prod the initialization of the map layers by
calling mMapView.onCreate() and mMapView.onResume() explicitly. See
also JoelLipman.com.
public class HomePageMaps extends SupportMapFragment {
private View mView;
private View mMapView;
private GoogleMap mMap;
#Override public View onCreateView(LayoutInflater inflater, ViewGroup group, Bundle state) {
super.onCreateView(inflater, group, state);
mView = inflater.inflate(R.layout.activity_home_page_maps, group, false);
mMapView= (MapView)mView.findViewById(R.id.map);
mMapView.onCreate(state);
mMapView.onResume();
mMap= mMapView.getMap();
mapUpdate();
return (mView);
}
private void mapUpdate() {
LatLng myLoc= new LatLng(33,-84);
MarkerOptions opt = new MarkerOptions();
mMap.clear();
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(myLoc, 15));
mMap.addMarker(opt.position(myLoc).title("Me"));
}
}
I got your issue change this line
mMap.addMarker(new MarkerOptions().position(new LatLng(33, -84)).title("Atlanta"));
to
mMap.addMarker(new MarkerOptions().position(new LatLng(33.7550,84.3900)).title("Atlanta"));
you have to pass the double value in lat and lng.
I found my "FirstMap" project, hope it helps. You will want to
move your map into a fragment sooner rather than later.
MapsActivity.java
public class MapsActivity extends FragmentActivity {
private PageMap mPageMap;
public interface IAction {
boolean onClick(int BtnID);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPageMap= new PageMap();
setContentView(R.layout.activity_main);
}
public void onClick(View Ctrl) {
int BtnID= Ctrl.getId();
switch(BtnID) {
case R.id.MainBtn_Map: ShowMap(); break;
default: mPageMap.onClick(BtnID);
}
}
private void ShowMap() {
LoadPage(mPageMap);
}
public void LoadPage(Fragment NewPage) {
FragmentManager Mgr= getSupportFragmentManager();
FragmentTransaction Action= Mgr.beginTransaction();
Action.replace(R.id.Main_FragmentContainer,NewPage);
Action.show(NewPage);
Action.commit();
}
}
res/layout/activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<Button
android:id="#+id/MainBtn_Map"
android:onClick="onClick"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:text="Load Map"
/>
<LinearLayout
android:id="#+id/Main_FragmentContainer"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#color/material_blue_grey_800"
>
</LinearLayout>
</LinearLayout>
PageMap.java
public class PageMap extends SupportMapFragment implements MapsActivity.IAction {
private FragmentActivity mActivity;
private MapView mMapView;
private GoogleMap mMap;
#Override public void onAttach(Activity parent) {
mActivity= (FragmentActivity)parent;
super.onAttach(parent);
}
#Override public View onCreateView(LayoutInflater inflater, ViewGroup group, Bundle instance) {
super.onCreateView(inflater,group,instance);
View view= inflater.inflate(R.layout.page_map,group,false);
mMapView= (MapView)view.findViewById(R.id.map);
mMapView.onCreate(instance);
mMapView.onResume();
mMap= mMapView.getMap();
return(view);
}
public boolean onClick(int BtnID) {
switch(BtnID) {
case R.id.PageMap_BtnUpdate: return (Update());
}
return (false);
}
private boolean Update() {
setUpMap();
return(true);
}
private void setUpMap() {
if(mMap!=null) {
LatLng loc = new LatLng(-34, 151);
mMap.addMarker(new MarkerOptions().position(loc).title("Marker"));
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(loc, 15));
}
}
}
//EOF: PAGEMAP.JAVA
res/layout/page_map.xml
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<Button
android:id="#+id/PageMap_BtnUpdate"
android:onClick="onClick"
android:text="Update"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<com.google.android.gms.maps.MapView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
/>
</LinearLayout>
I have an Activity (which inflates a map fragment) which implements the GoogleMap.onCameraChangedListener, and I have overriden the onCameraChange method.
The problem is that whenever I move across the map, i.e. the camera position changes, the onCameraChange method is never called.
What could be causing this?
Try this :
public class MapActivity extends AppCompatActivity implements
GoogleMap.OnCameraChangeListener{
private GoogleMap googleMap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.googlemap_layout);
setUpMapIfNeeded();
}
#Override
public void onCameraChange(CameraPosition cameraPosition) {
double latitude = cameraPosition.target.latitude;
double longitude = cameraPosition.target.longitude;
}
private void setUpMapIfNeeded() {
if (googleMap == null) {
// Try to obtain the map from the SupportMapFragment.
googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
if (googleMap != null) {
googleMap.setMyLocationEnabled(true);
googleMap.getUiSettings().setMyLocationButtonEnabled(true);
googleMap.getUiSettings().setRotateGesturesEnabled(false);
googleMap.getUiSettings().setZoomControlsEnabled(false);
googleMap.setOnCameraChangeListener(this);
}
}
}
}
Layout :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment" />
</RelativeLayout>