From 58919c2912941ac0a2ee8c8a927feef1596141b9 Mon Sep 17 00:00:00 2001
From: cketti <cketti@gmail.com>
Date: Sat, 2 Feb 2013 04:13:26 +0100
Subject: [PATCH] Fix accessing the unread count using MessageProvider

Thanks to teslacoil for diagnosing the problem and coming up with a fix.
---
 src/com/fsck/k9/provider/MessageProvider.java | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/com/fsck/k9/provider/MessageProvider.java b/src/com/fsck/k9/provider/MessageProvider.java
index 7035baa65..94442704a 100644
--- a/src/com/fsck/k9/provider/MessageProvider.java
+++ b/src/com/fsck/k9/provider/MessageProvider.java
@@ -13,6 +13,7 @@ import android.database.CursorWindow;
 import android.database.DataSetObserver;
 import android.database.MatrixCursor;
 import android.net.Uri;
+import android.os.Binder;
 import android.os.Bundle;
 import android.provider.BaseColumns;
 import android.util.Log;
@@ -460,10 +461,22 @@ public class MessageProvider extends ContentProvider {
             int accountId = -1;
             segments = uri.getPathSegments();
             accountId = Integer.parseInt(segments.get(1));
-            return getAccountUnread(accountId);
+
+            /*
+             * This method below calls Account.getStats() which uses EmailProvider to do its work.
+             * For this to work we need to clear the calling identity. Otherwise accessing
+             * EmailProvider will fail because it's not exported so third-party apps can't access it
+             * directly.
+             */
+            long identityToken = Binder.clearCallingIdentity();
+            try {
+                return getAccountUnread(accountId);
+            } finally {
+                Binder.restoreCallingIdentity(identityToken);
+            }
         }
 
-        public Cursor getAccountUnread(int accountNumber) {
+        private Cursor getAccountUnread(int accountNumber) {
             String[] projection = new String[] { "accountName", "unread" };
 
             MatrixCursor ret = new MatrixCursor(projection);