安卓定位Google+Google|安卓定位Google+Google Play services location APIs 安卓定位Google+GooglePlayservices

功能介绍:加载googleMap并知道定位到当前位置,当位置改变,定位的mark也随之改变

public class MainActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener, OnMapReadyCallback {LocationRequest mLocationRequest; GoogleApiClient mGoogleApiClient; LatLng latLng; GoogleMap mGoogleMap; SupportMapFragment mFragment; Marker mCurrLocation; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map); mFragment.getMapAsync(this); }@Override public void onMapReady(GoogleMap googleMap) {mGoogleMap = googleMap; if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { // TODO: Consider calling //ActivityCompat#requestPermissions // here to request the missing permissions, and then overriding //public void onRequestPermissionsResult(int requestCode, String[] permissions, //int[] grantResults) // to handle the case where the user grants the permission. See the documentation // for ActivityCompat#requestPermissions for more details. return; } mGoogleMap.setMyLocationEnabled(true); buildGoogleApiClient(); mGoogleApiClient.connect(); }@Override public void onPause() { super.onPause(); //Unregister for location callbacks: if (mGoogleApiClient != null) { LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this); } }protected synchronized void buildGoogleApiClient() { Toast.makeText(this, "buildGoogleApiClient", Toast.LENGTH_SHORT).show(); mGoogleApiClient = new GoogleApiClient.Builder(this) .addConnectionCallbacks(this) .addOnConnectionFailedListener(this) .addApi(LocationServices.API) .build(); }@Override public void onConnected(Bundle bundle) { Toast.makeText(this, "onConnected", Toast.LENGTH_SHORT).show(); if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { // TODO: Consider calling //ActivityCompat#requestPermissions // here to request the missing permissions, and then overriding //public void onRequestPermissionsResult(int requestCode, String[] permissions, //int[] grantResults) // to handle the case where the user grants the permission. See the documentation // for ActivityCompat#requestPermissions for more details. return; } Log.i("位置", LocationServices.FusedLocationApi.getLocationAvailability(mGoogleApiClient) + ""); Location mLastLocation = LocationServices.FusedLocationApi.getLastLocation( mGoogleApiClient); Log.i("位置",mLastLocation+"1111111"); if (mLastLocation != null) { //place marker at current position mGoogleMap.clear(); latLng = new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude()); MarkerOptions markerOptions = new MarkerOptions(); markerOptions.position(latLng); markerOptions.title("Current Position"); mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude()), 15)); markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA)); mCurrLocation = mGoogleMap.addMarker(markerOptions); }mLocationRequest =LocationRequest.create(); mLocationRequest.setInterval(5000); //5 seconds mLocationRequest.setFastestInterval(3000); //3 seconds mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY); //mLocationRequest.setSmallestDisplacement(0.1F); //1/10 meterLocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this); }@Override public void onConnectionSuspended(int i) { Toast.makeText(this,"onConnectionSuspended",Toast.LENGTH_SHORT).show(); }@Override public void onConnectionFailed(ConnectionResult connectionResult) { Toast.makeText(this,"onConnectionFailed",Toast.LENGTH_SHORT).show(); } /** *当位置发生改变 **/ @Override public void onLocationChanged(Location location) {//remove previous current location marker and add new one at current position if (mCurrLocation != null) { mCurrLocation.remove(); } latLng = new LatLng(location.getLatitude(), location.getLongitude()); MarkerOptions markerOptions = new MarkerOptions(); markerOptions.position(latLng); markerOptions.title("Current Position00"); Log.i("位置............",location+""); markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA)); mCurrLocation = mGoogleMap.addMarker(markerOptions); mGoogleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 16.0f)); Toast.makeText(this,"Location Changed",Toast.LENGTH_SHORT).show(); //If you only need one location, unregister the listener //LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this); }}

【安卓定位Google+Google|安卓定位Google+Google Play services location APIs】关于LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient); 返回null问题,这是由于建立连接需要一段时间,你可以启动光放的googleMap先建立一次连接.