CameraSettings: Do not crash if zoom ratios are not exposed

* On some devices, wrappers do not expose the zoom ratios, so the 
  list of zoomRatios is empty. So the .add() method cant run from a
  null class. If zoom rations are not exposed, simply return an empty
  list and the camera will take the default HAL's zoom ratios

-This fixes front camera photo shoot on jfltexx
Change-Id: Ic64e41a8c5a2d51966ec95d4b020e5d3951eac0e

1 files changed, 5 insertions, 4 deletions

diff --git a/src/com/android/camera/CameraSettings.java b/src/com/android/camera/CameraSettings.java
index 210e1103d..73f8ddb65 100644
--- a/src/com/android/camera/CameraSettings.java
+++ b/src/com/android/camera/CameraSettings.java
@@ -772,10 +772,11 @@ public class CameraSettings {
         ArrayList<String> supported = new ArrayList<String>();
         int zoomMaxIdx = params.getMaxZoom();
         List <Integer>  zoomRatios = params.getZoomRatios();
-        int zoomMax = zoomRatios.get(zoomMaxIdx)/100;
-
-        for (int zoomLevel = 0; zoomLevel <= zoomMax; zoomLevel++) {
-            supported.add(String.valueOf(zoomLevel));
+        if (zoomRatios != null ) {
+            int zoomMax = zoomRatios.get(zoomMaxIdx)/100;
+            for (int zoomLevel = 0; zoomLevel <= zoomMax; zoomLevel++) {
+                supported.add(String.valueOf(zoomLevel));
+            }
         }
         return supported;
     }