Add dynamic Preferences indexing

- introduce a new private interface "Indexable".
- refactor Wallpaper and Wi-Fi settings to support this new
interface.
- only index saved/remembered Wi-Fi networks
- also add the capability to remove some data from the Index.

Fragments that want to publish some dynamic indexable data should
implement the "Indexable" interface and provide a static final field
named "INDEX_DATA_PROVIDER" with is the Indexable.IndexDataProvider
interface for providing the data for indexing.

Thru this interface the Index can ask what are the data chuncks to
index.

Change-Id: I31e7212c87b8218efe1a8f3028147cb19e119be6

1 files changed, 47 insertions, 4 deletions

diff --git a/src/com/android/settings/WallpaperTypeSettings.java b/src/com/android/settings/WallpaperTypeSettings.java
index fa5f0ac73..f46315a1d 100644
--- a/src/com/android/settings/WallpaperTypeSettings.java
+++ b/src/com/android/settings/WallpaperTypeSettings.java
@@ -16,18 +16,23 @@
 
 package com.android.settings;
 
-import android.app.Activity;
 import android.content.ComponentName;
+import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.os.Bundle;
 import android.preference.Preference;
 import android.preference.PreferenceScreen;
+import com.android.settings.indexer.Indexable;
+import com.android.settings.indexer.IndexableData;
+import com.android.settings.indexer.IndexableRef;
 
+import java.util.ArrayList;
 import java.util.List;
 
-public class WallpaperTypeSettings extends SettingsPreferenceFragment {
+public class WallpaperTypeSettings extends SettingsPreferenceFragment implements Indexable {
+
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -38,9 +43,9 @@ public class WallpaperTypeSettings extends SettingsPreferenceFragment {
 
     private void populateWallpaperTypes() {
         // Search for activities that satisfy the ACTION_SET_WALLPAPER action
-        Intent intent = new Intent(Intent.ACTION_SET_WALLPAPER);
+        final Intent intent = new Intent(Intent.ACTION_SET_WALLPAPER);
         final PackageManager pm = getPackageManager();
-        List<ResolveInfo> rList = pm.queryIntentActivities(intent,
+        final List<ResolveInfo> rList = pm.queryIntentActivities(intent,
                 PackageManager.MATCH_DEFAULT_ONLY);
 
         final PreferenceScreen parent = getPreferenceScreen();
@@ -58,4 +63,42 @@ public class WallpaperTypeSettings extends SettingsPreferenceFragment {
             parent.addPreference(pref);
         }
     }
+
+    public static final IndexDataProvider INDEX_DATA_PROVIDER =
+        new IndexDataProvider() {
+            @Override
+            public List<IndexableRef> getRefsToIndex(Context context) {
+                return null;
+            }
+
+            @Override
+            public List<IndexableData> getRawDataToIndex(Context context) {
+                final List<IndexableData> result = new ArrayList<IndexableData>();
+
+                final Intent intent = new Intent(Intent.ACTION_SET_WALLPAPER);
+                final PackageManager pm = context.getPackageManager();
+                final List<ResolveInfo> rList = pm.queryIntentActivities(intent,
+                        PackageManager.MATCH_DEFAULT_ONLY);
+
+                // Add indexable data for each of the matching activities
+                for (ResolveInfo info : rList) {
+                    Intent prefIntent = new Intent(intent);
+                    prefIntent.setComponent(new ComponentName(
+                            info.activityInfo.packageName, info.activityInfo.name));
+                    CharSequence label = info.loadLabel(pm);
+                    if (label == null) label = info.activityInfo.packageName;
+
+                    IndexableData data = new IndexableData();
+                    data.title = label.toString();
+                    data.fragmentTitle = context.getResources().getString(
+                            R.string.wallpaper_settings_fragment_title);
+                    data.intentAction = intent.getAction();
+                    data.intentTargetPackage = info.activityInfo.packageName;
+                    data.intentTargetClass = info.activityInfo.name;
+                    result.add(data);
+                }
+
+                return result;
+            }
+        };
 }