我正在尝试在我的应用程序中实现地理围栏，因此每当用户输入其中一个地理围栏对象时，就会发生一些事情。按照Android开发人员指南（让您的应用位置知晓），当我添加此代码段时：
LocationServices.GeofencingApi.addGeofences(
mGoogleApiClient,
getGeofencingRequest(),
getGeofencePendingIntent()
).setResultCallback(this);
我在加载地理围栏后把它放在我的onMapReady（）中，这样它们就会立即添加到我的应用程序中。但是，我收到了这个错误：
java.lang.IllegalStateException: GoogleApiClient is not connected yet.
我确信我已经在onCreate（）中构建了google api客户端，但我仍然遇到此错误。如果我删除上面的代码段（第一个代码段），则错误不再存在。我做错了什么？
代码：
公共类MapsActivity扩展AppCompatActivity实现OnMapReadyCallback，ConnectionCallbacks，OnConnectionFailedListener，LocationListener，ResultCallback {
//Google Maps
public GoogleMap mMap;
private GoogleApiClient mGoogleApiClient;
LocationRequest mLocationRequest = new LocationRequest();
public Location mCurrentLocation;
private static final int FINE_LOCATION_PERMISSION_REQUEST = 1;
private static final int CONNECTION_RESOLUTION_REQUEST = 2;
List<Marker> markerList = new ArrayList<Marker>();
//Temporary Vars
double lat = 0;
double lon = 0;
Marker current_marker;
//Request Info vars
static final int GET_DETAILS = 1;
static final int EDIT_DETAILS = 2;
//Debug
private static final String TAG = "GeekysMessage";
SharedPreferences sharedPreferences;
int markerCount;
private Toolbar toolbar;
//Geofence
private boolean mGeofencesAdded;
ArrayList mGeofenceList = new ArrayList<Geofence>();
private PendingIntent mGeofencePendingIntent;
public int geofenceCount;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
toolbar = (Toolbar) findViewById(R.id.my_toolbar);
setSupportActionBar(toolbar);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
buildGoogleAPIClient();
//Geofence
// Empty list for storing geofences.
mGeofenceList = new ArrayList<Geofence>();
// Initially set the PendingIntent used in addGeofences() and removeGeofences() to null.
mGeofencePendingIntent = null;
}
@Override
protected void onResume() {
super.onResume();
buildGoogleAPIClient();
if (mGoogleApiClient.isConnected()) {
startLocationUpdates();
}
}
//LOCATION
private void buildGoogleAPIClient() {
if (mGoogleApiClient == null) {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
createLocationRequest();
}
}
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(10000);
mLocationRequest.setFastestInterval(5000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
protected void onStart() {
mGoogleApiClient.connect();
super.onStart();
}
protected void onStop() {
mGoogleApiClient.disconnect();
super.onStop();
}
protected void startLocationUpdates() {
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
@Override
public void onConnected(@Nullable Bundle bundle) {
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
if (mCurrentLocation == null) {
mCurrentLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
updateUI();
}
startLocationUpdates();
}
}
@TargetApi(Build.VERSION_CODES.N)
@Override
public void onLocationChanged(Location location) {
mCurrentLocation = location;
updateUI();
Toast.makeText(this, "Updated",
Toast.LENGTH_SHORT).show();
}
private void updateUI() {
}
@Override
public void onConnectionSuspended(int i) {
Toast.makeText(this, "Connection suspended", Toast.LENGTH_SHORT).show();
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
if (connectionResult.hasResolution()) {
try {
connectionResult.startResolutionForResult(this, CONNECTION_RESOLUTION_REQUEST);
} catch (IntentSender.SendIntentException e) {
// There was an error with the resolution intent. Try again.
mGoogleApiClient.connect();
}
} else {
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(connectionResult.getErrorCode(), this, 1);
dialog.show();
}
}
protected void stopLocationUpdates() {
// It is a good practice to remove location requests when the activity is in a paused or
// stopped state. Doing so helps battery performance and is especially
// recommended in applications that request frequent location updates.
// The final argument to {@code requestLocationUpdates()} is a LocationListener
// (http://developer.android.com/reference/com/google/android/gms/location/LocationListener.html).
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
@Override
protected void onPause() {
super.onPause();
// Stop location updates to save battery, but don't disconnect the GoogleApiClient object.
if (mGoogleApiClient.isConnected()) {
stopLocationUpdates();
}
}
int requestCode = 0;
//MAP
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
//load all saved markers
loadMarkers();
LocationServices.GeofencingApi.addGeofences(
mGoogleApiClient,
getGeofencingRequest(),
getGeofencePendingIntent()
).setResultCallback(this);
//Permissions
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
FINE_LOCATION_PERMISSION_REQUEST);
} else {
mMap.setMyLocationEnabled(true);
}
}
private void loadMarkers() {
// Opening the sharedPreferences object
sharedPreferences = getSharedPreferences("location", 0);
// Getting number of locations already stored
markerCount = sharedPreferences.getInt("markerCount", 0);
//if marker are already saved
if (markerCount != 0) {
String lat = "";
String lng = "";
String marker_title = null;
String marker_snippet = null;
int marker_radius = 0;
for (int i=0; i < markerCount; i++) {
lat = sharedPreferences.getString("lat"+i, "0");
lng = sharedPreferences.getString("lng"+i, "0");
marker_title = sharedPreferences.getString("title"+i, "");
marker_snippet = sharedPreferences.getString("snippet"+i, "");
marker_radius = sharedPreferences.getInt("radius"+i, 20);
double lati = Double.valueOf(lat);
double lngi = Double.valueOf(lng);
addMarker(lati, lngi, marker_title, marker_snippet);
addGeofence(marker_title, lati, lngi, marker_radius);
}
}
}
private PendingIntent getGeofencePendingIntent() {
// Reuse the PendingIntent if we already have it.
if (mGeofencePendingIntent != null) {
return mGeofencePendingIntent;
}
Intent intent = new Intent(this, GeofenceTransitionsIntentService.class);
// We use FLAG_UPDATE_CURRENT so that we get the same pending intent back when
// calling addGeofences() and removeGeofences().
return PendingIntent.getService(this, 0, intent, PendingIntent.
FLAG_UPDATE_CURRENT);
}
public void addMarker(double lati, double longi, String title, String snippet){
if (snippet==""){snippet = null;}
Marker m = mMap.addMarker(new MarkerOptions()
.position(new LatLng(lati, longi))
.title(title)
.snippet(snippet)
.draggable(true));
markerList.add(m);
}
public void saveMarkers(){
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.clear();
markerCount = 0;
for (Marker i : markerList) {
//Save to sharedprefences
markerCount++;
editor.putString("lat" + Integer.toString((markerCount - 1)), String.valueOf(i.getPosition().latitude));
editor.putString("lng" + Integer.toString((markerCount - 1)), String.valueOf(i.getPosition().longitude));
editor.putString("title" + Integer.toString((markerCount - 1)),i.getTitle());
editor.putString("snippet" + Integer.toString((markerCount - 1)),i.getSnippet());
editor.putInt("markerCount", markerCount);
editor.commit();
}
}
private GeofencingRequest getGeofencingRequest() {
GeofencingRequest.Builder builder = new GeofencingRequest.Builder();
builder.setInitialTrigger(GeofencingRequest.INITIAL_TRIGGER_ENTER);
builder.addGeofences(mGeofenceList);
return builder.build();
}
public void addGeofence(String key, double lat, double lng, int radius ){
mGeofenceList.add(new Geofence.Builder()
// Set the request ID of the geofence. This is a string to identify this
// geofence.
.setRequestId(key)
.setCircularRegion(
lat,
lng,
radius
)
.setExpirationDuration(12*60*60*1000)
.setTransitionTypes(Geofence.GEOFENCE_TRANSITION_ENTER |
Geofence.GEOFENCE_TRANSITION_EXIT)
.build());
Circle circle = mMap.addCircle(new CircleOptions()
.center(new LatLng(lat, lng))
.radius(radius)
.fillColor(Color.parseColor("#02bbff")));
}
@Override
public void onResult(@NonNull Status status) {
if (status.isSuccess()) {
// Update state and save in shared preferences.
mGeofencesAdded = !mGeofencesAdded;
Toast.makeText(
this,
getString(mGeofencesAdded ? R.string.geofences_added :
R.string.geofences_removed),
Toast.LENGTH_SHORT
).show();
} else {
// Get the status code for the error and log it using a user-friendly message.
String errorMessage = GeofenceErrorMessages.getErrorString(this,
status.getStatusCode());
Log.e(TAG, errorMessage);
}
}
}
非常感谢任何帮助。
答案 0 :(得分：1)
您正在mGoogleApiClient.disconnect();中呼叫onStop()。 LocationServices.GeofencingApi.addGeofences(代码必须触发onStop，因此mGoogleApiClient正在断开连接。
Boolean fromOnMapReady = false;
@Override
public void onMapReady(GoogleMap googleMap) {
fromOnMapReady = true;
protected void onStop() {
if(!fromOnMapReady){
mGoogleApiClient.disconnect();
}
super.onStop();
}
任何流程完成后都会重置fromOnMapReady = false，否则mGoogleApiClient将无法在需要时断开连接