我一直在尝试创建一个总线跟踪应用程序,但我一直坚持让应用程序定期显示手机的位置。我的目标是找到手机并在地图上绘图。我一直试图让标记显示我当前的位置并每秒更新一次(我使用手机跟踪公交车)
import android.location.Location;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class MainActivity extends Activity implements
OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener {
private final String TAG = "ThisIsStressful";
private TextView mLocationView;
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLocationView = new TextView(this);
setContentView(R.layout.activity_main);
MapFragment mapFragment = (MapFragment) getFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
}
public void onMapReady(GoogleMap map) {
//enable location of user
map.setMyLocationEnabled(true);
//map.moveCamera(CameraUpdateFactory.newLatLngZoom(mapCenter, 163));
// One example of Bus stop (Hard coded bus stop)
map.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE))
.position(new LatLng(2.975177, 101.729509))
.title("Murni")
.snippet("Bus Stop")
.flat(true));
}
@Override
protected void onStart() {
super.onStart();
// Connect the client.
mGoogleApiClient.connect();
}
@Override
protected void onStop() {
// Disconnecting the client invalidates it.
mGoogleApiClient.disconnect();
super.onStop();
}
@Override
public void onConnected(Bundle bundle) {
mLocationRequest = LocationRequest.create();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(1000); // Update location every second
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
@Override
public void onConnectionSuspended(int i) {
Log.i(TAG, "GoogleApiClient connection has been suspend");
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Log.i(TAG, "GoogleApiClient connection has failed");
}
@Override
public void onLocationChanged(Location location) {
mLocationView.setText("Location received: " + location.toString());
}
正如您在位置更改方法中看到的那样。我可以用字符串来表示。但我不知道如何将它作为标记显示在地图上。
答案 0 :(得分:0)
尝试在onLocationChanged方法中添加以下代码。
map.addMarker(new MarkerOptions() .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE))
.position(new LatLng(location.getLatitude(), location.getLongitude()))
.title("My Location")
.snippet("Current Location")
.flat(true));