Multi-user ringtone playback.

Change RingtonePlayer to open content:// Uris based on requesting
UserHandle.  Grant SystemUI visibility to all emulated storage so
it can play ringtones for apps without READ_EXTERNAL_STORAGE.

Resolve canonical file:// Uris before passing out of source app,
replacing any /emulated_legacy/-style paths with user-specific
variant so they can be opened by SystemUI.  Calling for RemoteViews,
Ringtones, and Notifications.

Bug: 7202982
Change-Id: Ibf0eca8df80c1486711144a7b648f464aadfe099

Author: jsharkey

core/java/android/app/NotificationManager.java

@@ -124,6 +124,9 @@ public void notify(String tag, int id, Notification notification)
         int[] idOut = new int[1];
         INotificationManager service = getService();
         String pkg = mContext.getPackageName();
+        if (notification.sound != null) {
+            notification.sound = notification.sound.getCanonicalUri();
+        }
         if (localLOGV) Log.v(TAG, pkg + ": notify(" + id + ", " + notification + ")");
         try {
             service.enqueueNotificationWithTag(pkg, tag, id, notification, idOut,
@@ -143,6 +146,9 @@ public void notifyAsUser(String tag, int id, Notification notification, UserHand
         int[] idOut = new int[1];
         INotificationManager service = getService();
         String pkg = mContext.getPackageName();
+        if (notification.sound != null) {
+            notification.sound = notification.sound.getCanonicalUri();
+        }
         if (localLOGV) Log.v(TAG, pkg + ": notify(" + id + ", " + notification + ")");
         try {
             service.enqueueNotificationWithTag(pkg, tag, id, notification, idOut,

core/java/android/net/Uri.java

@@ -16,10 +16,13 @@
 
 package android.net;
 
+import android.os.Environment;
 import android.os.Parcel;
 import android.os.Parcelable;
+import android.os.Environment.UserEnvironment;
 import android.util.Log;
 import java.io.File;
+import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.net.URLEncoder;
 import java.nio.charset.Charsets;
@@ -2288,4 +2291,39 @@ public static Uri withAppendedPath(Uri baseUri, String pathSegment) {
         builder = builder.appendEncodedPath(pathSegment);
         return builder.build();
     }
+
+    /**
+     * If this {@link Uri} is {@code file://}, then resolve and return its
+     * canonical path. Also fixes legacy emulated storage paths so they are
+     * usable across user boundaries. Should always be called from the app
+     * process before sending elsewhere.
+     *
+     * @hide
+     */
+    public Uri getCanonicalUri() {
+        if ("file".equals(getScheme())) {
+            final String canonicalPath;
+            try {
+                canonicalPath = new File(getPath()).getCanonicalPath();
+            } catch (IOException e) {
+                return this;
+            }
+
+            if (Environment.isExternalStorageEmulated()) {
+                final String legacyPath = Environment.getLegacyExternalStorageDirectory()
+                        .toString();
+
+                // Splice in user-specific path when legacy path is found
+                if (canonicalPath.startsWith(legacyPath)) {
+                    return Uri.fromFile(new File(
+                            Environment.getExternalStorageDirectory().toString(),
+                            canonicalPath.substring(legacyPath.length() + 1)));
+                }
+            }
+
+            return Uri.fromFile(new File(canonicalPath));
+        } else {
+            return this;
+        }
+    }
 }

core/java/android/os/UserHandle.aidl

@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2012, 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 android.os;
+
+parcelable UserHandle;

core/java/android/widget/RemoteViews.java

@@ -2166,6 +2166,8 @@ public void setCharSequence(int viewId, String methodName, CharSequence value) {
      * @param value The value to pass to the method.
      */
     public void setUri(int viewId, String methodName, Uri value) {
+        // Resolve any filesystem path before sending remotely
+        value = value.getCanonicalUri();
         addAction(new ReflectionAction(viewId, methodName, ReflectionAction.URI, value));
     }
 

media/java/android/media/IRingtonePlayer.aidl

@@ -17,6 +17,7 @@
 package android.media;
 
 import android.net.Uri;
+import android.os.UserHandle;
 
 /**
  * @hide
@@ -28,6 +29,6 @@ interface IRingtonePlayer {
     boolean isPlaying(IBinder token);
 
     /** Used for Notification sound playback. */
-    void playAsync(in Uri uri, boolean looping, int streamType);
+    void playAsync(in Uri uri, in UserHandle user, boolean looping, int streamType);
     void stopAsync();
 }

media/java/android/media/Ringtone.java

@@ -225,8 +225,9 @@ public void play() {
                 mLocalPlayer.start();
             }
         } else if (mAllowRemote) {
+            final Uri canonicalUri = mUri.getCanonicalUri();
             try {
-                mRemotePlayer.play(mRemoteToken, mUri, mStreamType);
+                mRemotePlayer.play(mRemoteToken, canonicalUri, mStreamType);
             } catch (RemoteException e) {
                 Log.w(TAG, "Problem playing ringtone: " + e);
             }

packages/SystemUI/AndroidManifest.xml

@@ -5,6 +5,7 @@
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.ACCESS_ALL_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
 
     <uses-permission android:name="android.permission.INJECT_EVENTS" />

packages/SystemUI/src/com/android/systemui/media/RingtonePlayer.java

@@ -17,6 +17,7 @@
 package com.android.systemui.media;
 
 import android.content.Context;
+import android.content.pm.PackageManager.NameNotFoundException;
 import android.media.IAudioService;
 import android.media.IRingtonePlayer;
 import android.media.Ringtone;
@@ -26,6 +27,7 @@
 import android.os.Process;
 import android.os.RemoteException;
 import android.os.ServiceManager;
+import android.os.UserHandle;
 import android.util.Slog;
 
 import com.android.systemui.SystemUI;
@@ -70,9 +72,10 @@ private class Client implements IBinder.DeathRecipient {
         private final IBinder mToken;
         private final Ringtone mRingtone;
 
-        public Client(IBinder token, Uri uri, int streamType) {
+        public Client(IBinder token, Uri uri, UserHandle user, int streamType) {
             mToken = token;
-            mRingtone = new Ringtone(mContext, false);
+
+            mRingtone = new Ringtone(getContextForUser(user), false);
             mRingtone.setStreamType(streamType);
             mRingtone.setUri(uri);
         }
@@ -90,12 +93,16 @@ public void binderDied() {
     private IRingtonePlayer mCallback = new IRingtonePlayer.Stub() {
         @Override
         public void play(IBinder token, Uri uri, int streamType) throws RemoteException {
-            if (LOGD) Slog.d(TAG, "play(token=" + token + ", uri=" + uri + ")");
+            if (LOGD) {
+                Slog.d(TAG, "play(token=" + token + ", uri=" + uri + ", uid="
+                        + Binder.getCallingUid() + ")");
+            }
             Client client;
             synchronized (mClients) {
                 client = mClients.get(token);
                 if (client == null) {
-                    client = new Client(token, uri, streamType);
+                    final UserHandle user = Binder.getCallingUserHandle();
+                    client = new Client(token, uri, user, streamType);
                     token.linkToDeath(client, 0);
                     mClients.put(token, client);
                 }
@@ -131,12 +138,13 @@ public boolean isPlaying(IBinder token) {
         }
 
         @Override
-        public void playAsync(Uri uri, boolean looping, int streamType) {
-            if (LOGD) Slog.d(TAG, "playAsync(uri=" + uri + ")");
+        public void playAsync(Uri uri, UserHandle user, boolean looping, int streamType) {
+            if (LOGD) Slog.d(TAG, "playAsync(uri=" + uri + ", user=" + user + ")");
             if (Binder.getCallingUid() != Process.SYSTEM_UID) {
                 throw new SecurityException("Async playback only available from system UID.");
             }
-            mAsyncPlayer.play(mContext, uri, looping, streamType);
+
+            mAsyncPlayer.play(getContextForUser(user), uri, looping, streamType);
         }
 
         @Override
@@ -149,6 +157,14 @@ public void stopAsync() {
         }
     };
 
+    private Context getContextForUser(UserHandle user) {
+        try {
+            return mContext.createPackageContextAsUser(mContext.getPackageName(), 0, user);
+        } catch (NameNotFoundException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
     @Override
     public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
         pw.println("Clients:");

services/java/com/android/server/NotificationManagerService.java

@@ -890,6 +890,7 @@ public void enqueueNotificationInternal(String pkg, int callingUid, int callingP
 
         userId = ActivityManager.handleIncomingUser(callingPid,
                 callingUid, userId, true, true, "enqueueNotification", pkg);
+        final UserHandle user = new UserHandle(userId);
 
         // Limit the number of notifications that any given package except the android
         // package can enqueue.  Prevents DOS attacks and deals with leaks.
@@ -991,7 +992,6 @@ public void enqueueNotificationInternal(String pkg, int callingUid, int callingP
             }
 
             if (notification.icon != 0) {
-                final UserHandle user = new UserHandle(userId);
                 final StatusBarNotification n = new StatusBarNotification(
                         pkg, id, tag, r.uid, r.initialPid, score, notification, user);
                 if (old != null && old.statusBarKey != null) {
@@ -1063,7 +1063,7 @@ public void enqueueNotificationInternal(String pkg, int callingUid, int callingP
                         try {
                             final IRingtonePlayer player = mAudioService.getRingtonePlayer();
                             if (player != null) {
-                                player.playAsync(uri, looping, audioStreamType);
+                                player.playAsync(uri, user, looping, audioStreamType);
                             }
                         } catch (RemoteException e) {
                         } finally {