Android:Geofence是否会自动更新用户位置?
创始人
2024-10-13 12:02:18
0

Geofence不会自动更新用户位置,需要通过实现LocationListener并监听位置更新来手动获取位置信息并更新Geofence。以下是一个示例代码:

public class MainActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {

    private GoogleApiClient mGoogleApiClient;
    private LocationRequest mLocationRequest;
    private Location mCurrentLocation;
    private ArrayList mGeofenceList;
    private PendingIntent mGeofencePendingIntent;
    private GeofencingClient mGeofencingClient;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addApi(LocationServices.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();

        mLocationRequest = new LocationRequest();
        mLocationRequest.setInterval(10000);
        mLocationRequest.setFastestInterval(5000);
        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

        mGeofenceList = new ArrayList<>();
        mGeofencingClient = LocationServices.getGeofencingClient(this);
        populateGeofenceList();
    }

    @Override
    protected void onStart() {
        super.onStart();
        mGoogleApiClient.connect();
    }

    @Override
    protected void onStop() {
        super.onStop();
        if (mGoogleApiClient.isConnected()) {
            LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
            mGoogleApiClient.disconnect();
        }
    }

    @Override
    public void onConnected(@Nullable Bundle bundle) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (checkSelfPermission(android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                requestPermissions(new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, 1);
            }
        }
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        if (requestCode == 1) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
            }
        }
    }

    @Override
    public void onConnectionSuspended(int i) {
        mGoogleApiClient.connect();
    }

    @Override
    public void onLocationChanged(Location location) {
        mCurrentLocation = location;
        updateGeofence();
    }

    private void populateGeofenceList() {
        mGeofenceList.add(new Geofence.Builder()
                .setRequestId("Google")

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