Added cancel method to autocomplete widget

libandroid/app/src/main/java/com/mapbox/services/android/testapp/geocoding/GeocodingWidgetActivity.java

@@ -116,6 +116,7 @@ protected void onSaveInstanceState(Bundle outState) {
   @Override
   protected void onDestroy() {
     super.onDestroy();
+    autocomplete.cancelApiCall();
     mapView.onDestroy();
   }
 

libandroid/lib/src/main/java/com/mapbox/services/android/geocoder/ui/GeocoderAdapter.java

@@ -1,6 +1,7 @@
 package com.mapbox.services.android.geocoder.ui;
 
 import android.content.Context;
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -19,6 +20,7 @@
 import java.io.IOException;
 import java.util.List;
 
+import retrofit2.Call;
 import retrofit2.Response;
 
 /**
@@ -37,6 +39,7 @@ public class GeocoderAdapter extends BaseAdapter implements Filterable {
   private double[] bbox;
   private Position position;
   private int limit;
+  private Call call;
 
   private GeocoderFilter geocoderFilter;
 
@@ -225,6 +228,18 @@ public void setLimit(int limit) {
     this.limit = limit;
   }
 
+  /**
+   * Can be used to cancel any calls currently in progress. It's a good idea to include in onDestroy() to prevent
+   * memory leaks
+   *
+   * @since 2.0.0
+   */
+  public void cancelApiCall() {
+    if (call != null) {
+      call.cancel();
+    }
+  }
+
   /*
    * Required by BaseAdapter
    */
@@ -366,6 +381,8 @@ protected FilterResults performFiltering(CharSequence constraint) {
           builder.setLimit(limit);
         }
 
+        call = builder.build().getCall();
+
         // Do request
         response = builder.build().executeCall();
       } catch (IOException ioException) {

libandroid/lib/src/main/java/com/mapbox/services/android/geocoder/ui/GeocoderAutoCompleteView.java

@@ -80,6 +80,16 @@ public boolean onTouch(View view, MotionEvent event) {
     });
   }
 
+  /**
+   * Can be used to cancel any calls currently in progress. It's a good idea to include in onDestroy() to prevent
+   * memory leaks
+   *
+   * @since 2.0.0
+   */
+  public void cancelApiCall() {
+    adapter.cancelApiCall();
+  }
+
   /*
    * Setters
    */