diff --git a/CHANGES.md b/CHANGES.md
index 898c2b4..2da4227 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -4,6 +4,7 @@
 * Added new API - Suspend Contract
 * Added new API - Resume Contract
 * Un/archive Activities start supporting a list of codes
+* Added new method client.getAuthorizationUrl(oauthCallback), supported in mobile applications
 
 ## 0.1.7
 * Added new API - Get brief profile summary
diff --git a/doc/java-odesk-javadoc.zip b/doc/java-odesk-javadoc.zip
index c51b484..02a7e36 100644
Binary files a/doc/java-odesk-javadoc.zip and b/doc/java-odesk-javadoc.zip differ
diff --git a/example-android/app/src/main/java/com/odesk/example_odeskapi/MyActivity.java b/example-android/app/src/main/java/com/odesk/example_odeskapi/MyActivity.java
index 040e18d..7b1509a 100644
--- a/example-android/app/src/main/java/com/odesk/example_odeskapi/MyActivity.java
+++ b/example-android/app/src/main/java/com/odesk/example_odeskapi/MyActivity.java
@@ -159,6 +159,9 @@ class ODeskAuthorizeTask extends AsyncTask<Void, Void, String> {
         @Override
         protected String doInBackground(Void... params) {
             String authzUrl = client.getAuthorizationUrl();
+            // if your api key type is 'mobile', possibly you want to use
+            // oauth_callback in your application, then use
+            //String authzUrl = client.getAuthorizationUrl("x-app://your_callback");
 
             startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(authzUrl)));
 
diff --git a/lib/java-odesk.jar b/lib/java-odesk.jar
index f3239fc..65ca4ab 100644
Binary files a/lib/java-odesk.jar and b/lib/java-odesk.jar differ
diff --git a/src/com/oDesk/api/OAuthClient.java b/src/com/oDesk/api/OAuthClient.java
index 4fbf423..fc28051 100644
--- a/src/com/oDesk/api/OAuthClient.java
+++ b/src/com/oDesk/api/OAuthClient.java
@@ -100,22 +100,23 @@ public OAuthClient(Config properties) {
 		mOAuthConsumer = new CommonsHttpOAuthConsumer(consumerKey, consumerSecret);
 	}
 	
+	/**
+	 * Get authorization URL, and use provided callback
+	 * 
+     * @param   oauthCallback URL, i.e. oauth_callback used in mobile applications
+	 * @return	URL for authorizing application
+	 * */
+	public String getAuthorizationUrl(String oauthCallback) {
+        return _getAuthorizationUrl(oauthCallback);
+    }
+
 	/**
 	 * Get authorization URL
 	 * 
 	 * @return	URL for authorizing application
 	 * */
 	public String getAuthorizationUrl() {
-		String url = null;
-        
-		try {
-            url = mOAuthProvider.retrieveRequestToken(mOAuthConsumer, "");
-        }
-        catch (OAuthException e) {
-            e.printStackTrace();
-        }
-		
-		return url;
+        return _getAuthorizationUrl("");
 	}
 	
 	/**
@@ -246,6 +247,25 @@ public JSONObject delete(String url, HashMap<String, String> params) throws JSON
 		return sendPostRequest(url, METHOD_DELETE, params);
 	}
 	
+	/**
+	 * Get authorization URL, use provided callback URL
+	 * 
+     * @param   oauthCallback URL, i.e. oauth_callback
+	 * @return	URL for authorizing application
+	 * */
+	private String _getAuthorizationUrl(String oauthCallback) {
+		String url = null;
+        
+		try {
+            url = mOAuthProvider.retrieveRequestToken(mOAuthConsumer, oauthCallback);
+        }
+        catch (OAuthException e) {
+            e.printStackTrace();
+        }
+		
+		return url;
+	}
+	
 	/**
 	 * Send signed GET OAuth request
 	 *