Merge "Support RRO for system wallpaper"

core/res/AndroidManifest.xml

@@ -4611,6 +4611,13 @@
             </intent-filter>
         </receiver>
 
+        <receiver android:name="com.android.server.WallpaperUpdateReceiver"
+                  android:permission="android.permission.RECEIVE_DEVICE_CUSTOMIZATION_READY">
+            <intent-filter>
+                <action android:name="android.intent.action.DEVICE_CUSTOMIZATION_READY"/>
+            </intent-filter>
+        </receiver>
+
         <service android:name="android.hardware.location.GeofenceHardwareService"
             android:permission="android.permission.LOCATION_HARDWARE"
             android:exported="false" />

services/core/java/com/android/server/WallpaperUpdateReceiver.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2018 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.server;
+
+import android.app.ActivityThread;
+import android.app.WallpaperManager;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.os.AsyncTask;
+import android.util.Slog;
+
+/**
+ * Receiver responsible for updating the wallpaper when the device
+ * configuration has changed.
+ *
+ * @hide
+ */
+public class WallpaperUpdateReceiver extends BroadcastReceiver {
+
+    private static final String TAG = "WallpaperUpdateReceiver";
+    private static final boolean DEBUG = false;
+
+    @Override
+    public void onReceive(final Context context, final Intent intent) {
+        if (DEBUG) Slog.d(TAG, "onReceive: " + intent);
+
+        if (intent != null && Intent.ACTION_DEVICE_CUSTOMIZATION_READY.equals(intent.getAction())) {
+            AsyncTask.execute(this::updateWallpaper);
+        }
+    }
+
+    private void updateWallpaper() {
+        try {
+            ActivityThread currentActivityThread = ActivityThread.currentActivityThread();
+            Context uiContext = currentActivityThread.getSystemUiContext();
+            WallpaperManager wallpaperManager = WallpaperManager.getInstance(uiContext);
+            if (DEBUG) Slog.d(TAG, "Set customized default_wallpaper.");
+            Bitmap blank = Bitmap.createBitmap(1, 1, Bitmap.Config.ALPHA_8);
+            // set a blank wallpaper to force a redraw of default_wallpaper
+            wallpaperManager.setBitmap(blank);
+            wallpaperManager.setResource(com.android.internal.R.drawable.default_wallpaper);
+        } catch (Exception e) {
+            Slog.w(TAG, "Failed to customize system wallpaper." + e);
+        }
+    }
+}