Wallpaper settings

Added an option in Screen settings to choose a wallpaper.
It then shows a list of wallpaper sources and launches the
corresponding intent on selecting.

Bug: 4691375
Change-Id: I9de9edf56ae4cdd5145a1c5d836df66b893a05fe

res/values/strings.xml

@@ -1450,6 +1450,8 @@
     <string name="screen_timeout">Timeout</string>
     <!-- Sound & display settings screen, setting option summary to change screen timeout -->
     <string name="screen_timeout_summary">Screen turns off automatically after <xliff:g id="timeout_description">%1$s</xliff:g></string>
+    <!-- Wallpaper settings title [CHAR LIMIT=30] -->
+    <string name="wallpaper_settings_title">Wallpaper</string>
     <!-- Display settings screen, trigger for screen saver options -->
     <string name="dream_settings_title">Android Dreams</string>
     <!-- Display settings screen, summary for screen saver options -->

res/xml/display_settings.xml

@@ -41,7 +41,13 @@
                 android:persistent="false"
                 android:entries="@array/screen_timeout_entries"
                 android:entryValues="@array/screen_timeout_values" />
-                
+
+        <PreferenceScreen
+                android:key="wallpaper"
+                android:title="@string/wallpaper_settings_title"
+                android:fragment="com.android.settings.WallpaperTypeSettings"
+            />
+
         <PreferenceScreen 
                 android:title="@string/dream_settings_title" 
                 android:summary="@string/dream_settings_summary"

res/xml/wallpaper_settings.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2011 The Android Open Source Project
+
+     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.
+-->
+
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
+        android:title="@string/wallpaper_settings_title">
+
+</PreferenceScreen>

src/com/android/settings/WallpaperTypeSettings.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * 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.android.settings;
+
+import android.content.ComponentName;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.graphics.drawable.Drawable;
+import android.os.Bundle;
+import android.preference.Preference;
+
+import java.util.List;
+
+public class WallpaperTypeSettings extends SettingsPreferenceFragment {
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        addPreferencesFromResource(R.xml.wallpaper_settings);
+
+        populateWallpaperTypes();
+    }
+
+    private void populateWallpaperTypes() {
+        // Search for activities that satisfy the ACTION_SET_WALLPAPER action
+        Intent intent = new Intent(Intent.ACTION_SET_WALLPAPER);
+        final PackageManager pm = getPackageManager();
+        List<ResolveInfo> rList = pm.queryIntentActivities(intent,
+                PackageManager.MATCH_DEFAULT_ONLY);
+
+        // Add Preference items for each of the matching activities
+        for (ResolveInfo info : rList) {
+            Preference pref = new Preference(getActivity());
+            Intent prefIntent = new Intent(intent);
+            prefIntent.setComponent(new ComponentName(
+                    info.activityInfo.packageName, info.activityInfo.name));
+            pref.setIntent(prefIntent);
+            CharSequence label = info.loadLabel(pm);
+            if (label == null) label = info.activityInfo.packageName;
+            pref.setTitle(label);
+            getPreferenceScreen().addPreference(pref);
+        }
+    }
+}