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diff --git a/java/com/android/dialer/app/calllog/CallLogAsync.java b/java/com/android/dialer/app/calllog/CallLogAsync.java
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+++ b/java/com/android/dialer/app/calllog/CallLogAsync.java
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+/*
+ * Copyright (C) 2010 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.dialer.app.calllog;
+
+import android.content.Context;
+import android.os.AsyncTask;
+import android.provider.CallLog.Calls;
+import com.android.dialer.common.Assert;
+
+/**
+ * Class to access the call log asynchronously to avoid carrying out database operations on the UI
+ * thread, using an {@link AsyncTask}.
+ *
+ * <pre class="prettyprint"> Typical usage: ==============
+ *
+ * // From an activity... String mLastNumber = "";
+ *
+ * CallLogAsync log = new CallLogAsync();
+ *
+ * CallLogAsync.GetLastOutgoingCallArgs lastCallArgs = new CallLogAsync.GetLastOutgoingCallArgs(
+ * this, new CallLogAsync.OnLastOutgoingCallComplete() { public void lastOutgoingCall(String number)
+ * { mLastNumber = number; } }); log.getLastOutgoingCall(lastCallArgs); </pre>
+ */
+public class CallLogAsync {
+
+  /** CallLog.getLastOutgoingCall(...) */
+  public AsyncTask getLastOutgoingCall(GetLastOutgoingCallArgs args) {
+    Assert.isMainThread();
+    return new GetLastOutgoingCallTask(args.callback).execute(args);
+  }
+
+  /** Interface to retrieve the last dialed number asynchronously. */
+  public interface OnLastOutgoingCallComplete {
+
+    /** @param number The last dialed number or an empty string if none exists yet. */
+    void lastOutgoingCall(String number);
+  }
+
+  /** Parameter object to hold the args to get the last outgoing call from the call log DB. */
+  public static class GetLastOutgoingCallArgs {
+
+    public final Context context;
+    public final OnLastOutgoingCallComplete callback;
+
+    public GetLastOutgoingCallArgs(Context context, OnLastOutgoingCallComplete callback) {
+      this.context = context;
+      this.callback = callback;
+    }
+  }
+
+  /** AsyncTask to get the last outgoing call from the DB. */
+  private class GetLastOutgoingCallTask extends AsyncTask<GetLastOutgoingCallArgs, Void, String> {
+
+    private final OnLastOutgoingCallComplete mCallback;
+
+    public GetLastOutgoingCallTask(OnLastOutgoingCallComplete callback) {
+      mCallback = callback;
+    }
+
+    // Happens on a background thread. We cannot run the callback
+    // here because only the UI thread can modify the view
+    // hierarchy (e.g enable/disable the dial button). The
+    // callback is ran rom the post execute method.
+    @Override
+    protected String doInBackground(GetLastOutgoingCallArgs... list) {
+      String number = "";
+      for (GetLastOutgoingCallArgs args : list) {
+        // May block. Select only the last one.
+        number = Calls.getLastOutgoingCall(args.context);
+      }
+      return number; // passed to the onPostExecute method.
+    }
+
+    // Happens on the UI thread, it is safe to run the callback
+    // that may do some work on the views.
+    @Override
+    protected void onPostExecute(String number) {
+      Assert.isMainThread();
+      mCallback.lastOutgoingCall(number);
+    }
+  }
+}