我已经开始在 Android 上开发最后一个位置服务功能：地理围栏！！模拟位置提供程序是否存在任何已知问题？以下示例 (https://developer.android.com/training/location/geofencing.html) 即使当前位置在地理围栏内，我的意图服务也从未触发。我正在使用 FakeGPS android 应用程序作为模拟位置提供程序，如果我模拟路线，我会在 Google 地图应用程序上看到位置变化，因此模拟位置提供程序运行良好。有什么想法吗？
谢谢。 保罗。
【问题讨论】：
标签： android android-location android-geofence
我一直在努力让它发挥作用。谷歌多么痛苦！因为它说可以使用模拟轻松测试地理围栏。
魔术是在传递给 setMockLocation 的位置中使用提供者名称“network”。
Location location = new Location("network");
location.setLatitude(latitude);
location.setLongitude(longitude);
location.setTime(new Date().getTime());
location.setAccuracy(3.0f);
location.setElapsedRealtimeNanos(System.nanoTime());
LocationServices.FusedLocationApi.setMockLocation(_googleApiClient, location);
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实际上，如果您的应用在前台，则在上述示例中使用的 Intent 服务效果很好，但当应用在后台时，该 IntentService 永远不会被调用。因此我们需要使用 Broadcast-Receiver 而不是 Intent 服务。
我发现这个博客有助于获得解决方案。
http://davehiren.blogspot.in/2015/01/android-geofence-stop-getting.html
【讨论】：
地理围栏使用 FusedLocationProviderApi，因此要模拟它们，您必须使用 FusedLocationProviderApi.setMockLocation
【讨论】：
确保在您的手机上启用模拟位置。选择设置->开发者选项->“允许模拟位置”。
【讨论】：
LocationServices.FusedLocationApi.setMockMode(googleApiClient, true) 需要在设置 Mock Location 之前使用。
【讨论】：
您可以使用广播接收器代替这样的活动
public class GeofenceReceiver extends BroadcastReceiver
implements
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
ResultCallback<Status>{
GoogleApiClient mGoogleApiClient;
PendingIntent mGeofencePendingIntent ;
Context mContext;
@Override
public void onReceive(Context context, Intent intent) {
mContext = context;
mGoogleApiClient = new GoogleApiClient.Builder(mContext)
.addOnConnectionFailedListener(this)
.addConnectionCallbacks(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
try {
LocationServices.GeofencingApi.addGeofences(
mGoogleApiClient,
// The GeofenceRequest object.
getGeofencingRequest(),
getGeofencePendingIntent()
).setResultCallback(this); // Result processed in onResult().
} catch (SecurityException securityException) {
Log.i(getClass().getSimpleName(),securityException.getMessage());
}
}
// Catch exception generated if the app does not use ACCESS_FINE_LOCATION permission.
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
/**
* Runs when the result of calling addGeofences() and removeGeofences() becomes available.
* Either method can complete successfully or with an error.
*
* Since this activity implements the {@link ResultCallback} interface, we are required to
* define this method.
*
* @param status The Status returned through a PendingIntent when addGeofences() or
* removeGeofences() get called.
*/
@Override
public void onResult(@NonNull Status status) {
if (status.isSuccess()) {
Log.i(getClass().getSimpleName(),"Success");
} else {
// Get the status code for the error and log it using a user-friendly message.
Log.i(getClass().getSimpleName(),getErrorString(status.getStatusCode()));
}
}
private GeofencingRequest getGeofencingRequest() {
GeofencingRequest.Builder builder = new GeofencingRequest.Builder();
builder.setInitialTrigger(GeofencingRequest.INITIAL_TRIGGER_ENTER | GeofencingRequest.INITIAL_TRIGGER_DWELL);
builder.addGeofences(getGeofecne());
return builder.build();
}
private List<Geofence> getGeofecne(){
List<Geofence> mGeofenceList = new ArrayList<>();
//add one object
mGeofenceList.add(new Geofence.Builder()
// Set the request ID of the geofence. This is a string to identify this
// geofence.
.setRequestId("key")
// Set the circular region of this geofence.
.setCircularRegion(
25.768466, //lat
47.567625, //long
50) // radios
// Set the expiration duration of the geofence. This geofence gets automatically
// removed after this period of time.
//1000 millis * 60 sec * 5 min
.setExpirationDuration(1000 * 60 * 5)
// Set the transition types of interest. Alerts are only generated for these
// transition. We track entry and exit transitions in this sample.
.setTransitionTypes(
Geofence.GEOFENCE_TRANSITION_DWELL)
//it's must to set time in millis with dwell transition
.setLoiteringDelay(3000)
// Create the geofence.
.build());
return mGeofenceList;
}
private PendingIntent getGeofencePendingIntent() {
// Reuse the PendingIntent if we already have it.
if (mGeofencePendingIntent != null) {
return mGeofencePendingIntent;
}
Intent intent = new Intent(mContext, GeofenceTransitionsIntentService.class);
return PendingIntent.getService(mContext, 0, intent, PendingIntent.
FLAG_UPDATE_CURRENT);
}
}
查看我的仓库，有一个使用地理围栏的完整示例 https://github.com/3zcs/Geofence
【讨论】：