如何在 android 中使用 Geo Fence？答案

【问题标题】：GeoFence in android如何在 android 中使用 Geo Fence？
【发布时间】：2016-02-06 10:36:50
【问题描述】：

我正在尝试在 android 应用程序中实现地理围栏。我遵循了本教程http://developer.android.com/training/location/geofencing.html。和

在此处输入代码

   mapFragment = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map));
    googleMap = mapFragment.getMap();
    // set OnMarkerDrag Listener
    googleMap.setOnMarkerDragListener(this);
    // radius distance for geofencing boundary
    distance = 1;
    // move camera at specific location.
    // current location latitude and longitude can be provided here
    googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(Mylatitude, Mylongitude), 1));

    // createGeofence location latitude and longitude and shape
    createGeofence(latitudeGeofence, longitudeGeofence, distance, "CIRCLE", "MyOffice");
}
private void createGeofence(double latitude, double longitude, int radius, String geofenceType, String title){
    Marker marker = googleMap.addMarker(new MarkerOptions().draggable(true).position(new LatLng(latitude, longitude)).title(title).draggable(true).icon(BitmapDescriptorFactory.fromResource(R.drawable.lock)));
   //marker.setAnchor(10,10);

    googleMap.addCircle(new CircleOptions().center(new LatLng(latitude, longitude)).radius(radius).strokeColor(Color.parseColor("#ffff00")).fillColor(Color.parseColor("#B2A9F6")));
}

public void onMarkerDrag(Marker marker){}

public void onMarkerDragEnd(Marker marker){
    LatLng dragPosition = marker.getPosition();
    double dragLat = dragPosition.latitude;
    double dragLong = dragPosition.longitude;

    googleMap.clear();
    createGeofence(dragLat, dragLong, distance, "CIRCLE", "GEOFENCE");
}
public void onMarkerDragStart(Marker marker){}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_fencing, menu);
    return true;
}

但它不起作用，它没有收到任何关于在 android 应用程序中进入和退出的通知。请帮助我如何开发地理围栏以及如何在应用程序中获取通知。提前谢谢。

【问题讨论】：

你列出的代码只是在谷歌地图上画了一个圆圈。这不是创建地理围栏。
感谢您的回复。请帮助我如何在应用程序中进行地理围栏。提前致谢。

标签： android geofencing android-geofence

【解决方案1】：

public class SimpleGeofence {

    private final String mId;
    private final double mLatitude;
    private final double mLongitude;
    private final float mRadius;
    private long mExpirationDuration;
    private int mTransitionType;

    public SimpleGeofence(String geofenceId, double latitude, double longitude, float radius,long expiration, int transition) {

        this.mId = geofenceId;
        this.mLatitude = latitude;
        this.mLongitude = longitude;
        this.mRadius = radius;
        this.mExpirationDuration = expiration;
        this.mTransitionType = transition;
    }

    public String getId() {
        return mId;
    }
    public double getLatitude() {
        return mLatitude;
    }
    public double getLongitude() {
        return mLongitude;
    }
    public float getRadius() {
        return mRadius;
    }
    public long getExpirationDuration() {
        return mExpirationDuration;
    }
    public int getTransitionType() {
        return mTransitionType;
    }


    public Geofence toGeofence() {
        return new Geofence.Builder()
            .setRequestId(mId)
            .setTransitionTypes(mTransitionType)
            .setCircularRegion(mLatitude, mLongitude, mRadius)
            .setExpirationDuration(mExpirationDuration)
            .build();
    }
}

private GeofencingRequest getGeofencingRequest() {
    GeofencingRequest.Builder builder = new GeofencingRequest.Builder();
    builder.setInitialTrigger(GeofencingRequest.INITIAL_TRIGGER_ENTER);
    builder.addGeofences(mGeofenceList);return builder.build();
}

试试这个，这可能对你有帮助。

【讨论】：