Adding search suggestions

MyTracks/AndroidManifest.xml

@@ -112,12 +112,19 @@ limitations under the License.
     <meta-data android:name="com.google.android.backup.api_key"
                android:value="AEdPqrEAAAAIi-_QiwoRSc9_bAC9cmuNXTQyU8ajJmGtKdhskQ" />
 
+    <!-- Main track data provider -->
     <provider android:name="com.google.android.apps.mytracks.content.MyTracksProvider"
               android:authorities="com.google.android.maps.mytracks"
               android:exported="true"
               android:readPermission="com.google.android.apps.mytracks.READ_TRACK_DATA"
               android:writePermission="com.google.android.apps.mytracks.WRITE_TRACK_DATA" />
 
+    <!-- Provider for search suggestions -->
+    <provider android:name="com.google.android.apps.mytracks.content.SearchEngineProvider"
+              android:authorities="com.google.android.maps.mytracks.search"
+              android:exported="false" />
+
+    <!-- Main activity -->
     <activity android:name="com.google.android.apps.mytracks.MyTracks"
               android:configChanges="mcc|mnc|locale|touchscreen|keyboard|keyboardHidden|navigation|orientation|fontScale">
       <intent-filter>

MyTracks/res/xml/search.xml

@@ -5,6 +5,7 @@
     android:label="@string/my_tracks_app_name"
     android:searchSettingsDescription="@string/search_global_description"
     android:voicePromptText="@string/search_voice_prompt"
-    android:voiceSearchMode="showVoiceSearchButton|launchRecognizer">
-    <!-- TODO: Add search suggestions -->
-</searchable>
+    android:voiceSearchMode="showVoiceSearchButton|launchRecognizer"
+    android:searchSuggestAuthority="com.google.android.maps.mytracks.search"
+    android:searchSuggestThreshold="2"
+    android:searchSuggestSelection=" ? " />

MyTracks/src/com/google/android/apps/mytracks/SearchActivity.java

@@ -18,12 +18,13 @@ package com.google.android.apps.mytracks;
 import static com.google.android.apps.mytracks.Constants.TAG;
 
 import com.google.android.apps.mytracks.content.SearchEngine;
+import com.google.android.apps.mytracks.content.SearchEngine.ScoredResult;
+import com.google.android.apps.mytracks.content.SearchEngine.SearchQuery;
+import com.google.android.apps.mytracks.content.SearchEngineProvider;
 import com.google.android.apps.mytracks.content.Track;
 import com.google.android.apps.mytracks.content.TracksColumns;
 import com.google.android.apps.mytracks.content.Waypoint;
 import com.google.android.apps.mytracks.content.WaypointsColumns;
-import com.google.android.apps.mytracks.content.SearchEngine.ScoredResult;
-import com.google.android.apps.mytracks.content.SearchEngine.SearchQuery;
 import com.google.android.maps.mytracks.R;
 
 import android.app.ListActivity;
@@ -34,6 +35,7 @@ import android.location.Location;
 import android.location.LocationManager;
 import android.net.Uri;
 import android.os.Bundle;
+import android.provider.SearchRecentSuggestions;
 import android.util.Log;
 import android.view.View;
 import android.widget.ListView;
@@ -60,11 +62,14 @@ public class SearchActivity extends ListActivity {
   private SearchEngine engine;
   private LocationManager locationManager;
 
+  private SearchRecentSuggestions suggestions;
+
   @Override
   protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
 
     engine = new SearchEngine(this);
+    suggestions = SearchEngineProvider.newHelper(this);
     locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
 
     handleIntent(getIntent());
@@ -116,6 +121,9 @@ public class SearchActivity extends ListActivity {
         showSearchResults(displayResults);
       }
     });
+
+    // Save the query as a suggestion for the future.
+    suggestions.saveRecentQuery(query.textQuery, null);
   }
 
   private List<Map<String, Object>> prepareResultsforDisplay(

MyTracks/src/com/google/android/apps/mytracks/content/SearchEngineProvider.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.google.android.apps.mytracks.content;
+
+import android.content.Context;
+import android.content.SearchRecentSuggestionsProvider;
+import android.provider.SearchRecentSuggestions;
+
+/**
+ * Content provider for search suggestions.
+ *
+ * @author Rodrigo Damazio
+ */
+public class SearchEngineProvider extends SearchRecentSuggestionsProvider {
+
+  private static final String AUTHORITY = "com.google.android.maps.mytracks.search";
+  private static final int MODE = DATABASE_MODE_QUERIES;
+
+  public SearchEngineProvider() {
+    setupSuggestions(AUTHORITY, MODE);
+  }
+
+  // TODO: Also add suggestions from the database.
+
+  /**
+   * Creates and returns a helper for adding recent queries or clearing the recent query history.
+   */
+  public static SearchRecentSuggestions newHelper(Context context) {
+    return new SearchRecentSuggestions(context, AUTHORITY, MODE);
+  }
+}