Vibration when approaching object.

app/src/main/AndroidManifest.xml

@@ -30,4 +30,6 @@
 
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"  />
+
+    <uses-permission android:name="android.permission.VIBRATE"/>
 </manifest>

app/src/main/java/fr/chteufleur/mytrackingdog/MainActivity.java

@@ -12,6 +12,7 @@ import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Environment;
+import android.os.Vibrator;
 import android.preference.PreferenceManager;
 import android.support.annotation.NonNull;
 import android.support.annotation.RequiresApi;
@@ -181,7 +182,7 @@ public class MainActivity extends AppCompatActivity implements IOrientationConsu
         textViewCurrentLocation.setVisibility(View.GONE);
 
         if (serviceGps == null) {
-            serviceGps = new ServiceGps();
+            serviceGps = new ServiceGps((Vibrator) getSystemService(Context.VIBRATOR_SERVICE));
             serviceGps.addObserver(this);
         }
     }

app/src/main/java/fr/chteufleur/mytrackingdog/services/ServiceGps.java

@@ -1,11 +1,15 @@
 package fr.chteufleur.mytrackingdog.services;
 
+import android.content.res.Resources;
 import android.location.Location;
 import android.location.LocationListener;
 import android.location.LocationManager;
 import android.location.LocationProvider;
+import android.os.Build;
 import android.os.Bundle;
 import android.os.Environment;
+import android.os.VibrationEffect;
+import android.os.Vibrator;
 import android.util.Log;
 
 import org.xmlpull.v1.XmlPullParserException;
@@ -40,6 +44,10 @@ public class ServiceGps extends Observable implements IServiceGps, LocationListe
 
     private final Traces traces = new Traces();
 
+    public ServiceGps(Vibrator vibrator) {
+        this.vibrator = vibrator;
+    }
+
     public void setLocationManager(LocationManager locationManager) {
         this.locationManager = locationManager;
     }
@@ -90,6 +98,8 @@ public class ServiceGps extends Observable implements IServiceGps, LocationListe
         Log.i(TAG, "Stop location");
     }
 
+    private final Vibrator vibrator;
+    private boolean nearObjectVibration = false;
 
     @Override
     public void onLocationChanged(Location location) {
@@ -98,6 +108,27 @@ public class ServiceGps extends Observable implements IServiceGps, LocationListe
         traces.addCurrentPoint(currentLocation);
         setChanged();
         notifyObservers(NOTIF_NEW_LOCATION);
+
+        if (isDogActivated()) {
+            if (isNearObjects()) {
+                if (!nearObjectVibration) {
+                    nearObjectVibration = true;
+                    vibrate(1_000);
+                }
+            } else {
+                nearObjectVibration = false;
+            }
+        }
+    }
+
+    private void vibrate(int timeVibrationMs) {
+        if (this.vibrator != null) {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                this.vibrator.vibrate(VibrationEffect.createOneShot(timeVibrationMs, VibrationEffect.DEFAULT_AMPLITUDE));
+            } else {
+                this.vibrator.vibrate(timeVibrationMs);
+            }
+        }
     }
 
     @Override
@@ -187,11 +218,18 @@ public class ServiceGps extends Observable implements IServiceGps, LocationListe
         return traces.getPointObjectDog(lat, lon);
     }
 
+    public boolean isNearObjects() {
+        return !foundNearObjects(20).isEmpty();
+    }
     public List<WayPointLocation> foundNearObjects() {
+        return foundNearObjects(10);
+    }
+
+    public List<WayPointLocation> foundNearObjects(int distance) {
         List<WayPointLocation> ret = new ArrayList<>();
         MyLocation curLoc = currentLocation;
         for (MyLocation ml: getListGeoPointObjectsTrail()) {
-            if (curLoc.distanceTo(ml) < 10 && ml instanceof WayPointLocation) {
+            if (curLoc.distanceTo(ml) < distance && ml instanceof WayPointLocation) {
                 ret.add((WayPointLocation) ml);
             }
         }