我在谷歌地图上找到以下代码（第2项）以显示设备当前位置......效果很好......但是如何将其转换为片段以将其添加到现有主要活动中。我的大多数代码使用片段如下（第1项）：
ITEM 1
switch (position) {
case 0:
fragment = new HomeFragment();
break;
case 1:
fragment = new login_login();
break;
case 2:
fragment = new login_create();
break;
case 3:
fragment = new calendar();
break;
case 4:
fragment = new live_webcast();
break;
case 5:
fragment = new live_webcast_archive();
break;
case 6:
fragment = new find_us();
break;
第2项
import android.location.Location;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class Maps2Activity extends FragmentActivity implements LocationProvider.LocationCallback {
// Use Location Provider
public static final String TAG = Maps2Activity.class.getSimpleName();
private GoogleMap mMap; // Might be null if Google Play services APK is not available.
private LocationProvider mLocationProvider;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity2_maps);
setUpMapIfNeeded();
mLocationProvider = new LocationProvider(this, this);
}
@Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
mLocationProvider.connect();
}
@Override
protected void onPause() {
super.onPause();
mLocationProvider.disconnect();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the find_us.
if (mMap == null) {
// Try to obtain the find_us from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the find_us.
if (mMap != null) {
setUpMap();
}
}
}
/**
* This is where we can add markers or lines, add listeners or move the camera. In this case, we
* just add a marker near Africa.
* <p/>
* This should only be called once and when we are sure that {@link #mMap} is not null.
*/
private void setUpMap() {
//mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
}
public void handleNewLocation(Location location) {
Log.d(TAG, location.toString());
double currentLatitude = location.getLatitude();
double currentLongitude = location.getLongitude();
LatLng latLng = new LatLng(currentLatitude, currentLongitude);
commonfunc.myprint("Lat/Lon______________: " + " " + currentLatitude + "-" +currentLongitude);
//mMap.addMarker(new MarkerOptions().position(new LatLng(currentLatitude, currentLongitude)).title("Current Location"));
MarkerOptions options = new MarkerOptions()
.position(latLng)
.title("I am here!");
mMap.clear();
mMap.addMarker(options);
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
}
}
答案 0 :(得分：1)
您可以将片段与SupportMapFragment小部件一起使用，如下所示：
MapFragment：
public class MapFragment extends Fragment implements OnMapReadyCallback,GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
public static MapFragment newInstance() {
Bundle args = new Bundle();
MapFragment fragment = new MapFragment();
fragment.setArguments(args);
return fragment;
}
private GoogleMap mMap;
private GoogleApiClient mGoogleApiClient;
private Context mContext;
@Override
public void onAttach(Context context) {
super.onAttach(context);
this.mContext = context;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_maps, null);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
// Get location
if (mGoogleApiClient == null) {
mGoogleApiClient = new GoogleApiClient.Builder(mContext)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
}
@Override
public void onStart() {
if (mGoogleApiClient != null)
mGoogleApiClient.connect();
super.onStart();
}
public void onStop() {
if (mGoogleApiClient != null)
mGoogleApiClient.disconnect();
super.onStop();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
if (ActivityCompat.checkSelfPermission(mContext, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
// Add a marker in Sydney and move the camera
Location mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
LatLng here = new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude());
mMap.addMarker(new MarkerOptions().position(here).title("YOU ARE HERE").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN)));
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(here, 14));
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
}
R.layout.fragment_maps：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/contenitor_child"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="50dp" >
<fragment android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
app:layout_collapseMode="parallax"
android:layout_width="match_parent"
android:layout_height="400dp"/>
</LinearLayout>
记得添加gms 编译'com.google.android.gms：play-services：9.8.0'