From ef1a4ecc65916e4e8d097ff91d8ccfceea858eb8 Mon Sep 17 00:00:00 2001
From: Mattia Iavarone <mat.iavarone@gmail.com>
Date: Tue, 27 Feb 2018 20:41:55 +0100
Subject: [PATCH] Check focus area max number before applying (#167)

---
 .../src/main/java/com/otaliastudios/cameraview/Camera1.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/cameraview/src/main/java/com/otaliastudios/cameraview/Camera1.java b/cameraview/src/main/java/com/otaliastudios/cameraview/Camera1.java
index 39d01df2..893dab91 100644
--- a/cameraview/src/main/java/com/otaliastudios/cameraview/Camera1.java
+++ b/cameraview/src/main/java/com/otaliastudios/cameraview/Camera1.java
@@ -38,8 +38,10 @@ class Camera1 extends CameraController implements Camera.PreviewCallback, Camera
             if (!isCameraAvailable()) return;
             mCamera.cancelAutoFocus();
             Camera.Parameters params = mCamera.getParameters();
-            params.setFocusAreas(null);
-            params.setMeteringAreas(null);
+            int maxAF = params.getMaxNumFocusAreas();
+            int maxAE = params.getMaxNumMeteringAreas();
+            if (maxAF > 0) params.setFocusAreas(null);
+            if (maxAE > 0) params.setMeteringAreas(null);
             applyDefaultFocus(params); // Revert to internal focus.
             mCamera.setParameters(params);
         }