Add some comments for zoom methods.
Also change RuntimeException to IllegalArgumentException.
bug:2458926
Change-Id: I87af31f5f3f10244131a1117bd1725c2d292b587
diff --git a/core/java/android/hardware/Camera.java b/core/java/android/hardware/Camera.java
index 4dddfd8..abebdeb 100644
--- a/core/java/android/hardware/Camera.java
+++ b/core/java/android/hardware/Camera.java
@@ -532,11 +532,15 @@
* called with value 3. Three ZoomCallback will be generated with zoom value
* 1, 2, and 3. The applications can call {@link #stopSmoothZoom} to stop
* the zoom earlier. The applications should not call startSmoothZoom again
- * or change the zoom value before zoom stops. This method is supported if
- * {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} is true.
+ * or change the zoom value before zoom stops. If the passing zoom value
+ * equals to the current zoom value, no zoom callback will be generated.
+ * This method is supported if {@link
+ * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true.
*
* @param value zoom value. The valid range is 0 to {@link
* android.hardware.Camera.Parameters#getMaxZoom}.
+ * @throws IllegalArgumentException if the zoom value is invalid.
+ * @throws RuntimeException if the method fails.
*/
public native final void startSmoothZoom(int value);
@@ -545,6 +549,8 @@
* ZoomCallback} to know when the zoom is actually stopped. This method is
* supported if {@link
* android.hardware.Camera.Parameters#isSmoothZoomSupported} is true.
+ *
+ * @throws RuntimeException if the method fails.
*/
public native final void stopSmoothZoom();