Add missing @Override annotations (#617)

vtm-android-example/src/org/oscim/android/test/MapActivity.java

@@ -38,6 +38,7 @@ public class MapActivity extends Activity {
         this(R.layout.activity_map);
     }
 
+    @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(mContentView);

vtm-android-example/src/org/oscim/android/test/MultiMapViewActivity.java

@@ -35,6 +35,7 @@ public class MultiMapViewActivity extends Activity {
     private MapView mMapView1, mMapView2;
     private MapPreferences mPrefs1, mPrefs2;
 
+    @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_map_multi);

vtm-android-example/src/org/oscim/android/test/PoiSearchActivity.java

@@ -96,6 +96,7 @@ public class PoiSearchActivity extends MapsforgeActivity implements ItemizedLaye
 
         Button addItem = (Button) findViewById(R.id.add_item);
         addItem.setOnClickListener(new View.OnClickListener() {
+            @Override
             public void onClick(View v) {
                 searchPatterns.add(new Pattern("", ""));
                 adapter.notifyDataSetChanged();
@@ -104,6 +105,7 @@ public class PoiSearchActivity extends MapsforgeActivity implements ItemizedLaye
 
         Button startSearch = (Button) findViewById(R.id.start_search);
         startSearch.setOnClickListener(new View.OnClickListener() {
+            @Override
             public void onClick(View v) {
                 // Clear overlays
                 mMarkerLayer.removeAllItems();
@@ -244,6 +246,7 @@ public class PoiSearchActivity extends MapsforgeActivity implements ItemizedLaye
             Button remove = (Button) convertView.findViewById(R.id.remove);
             remove.setTag(pattern);
             remove.setOnClickListener(new View.OnClickListener() {
+                @Override
                 public void onClick(View v) {
                     Pattern pat = (Pattern) v.getTag();
                     remove(pat);