diff --git a/zxinglibrary/src/main/java/com/yzq/zxinglibrary/bean/ZxingConfig.java b/zxinglibrary/src/main/java/com/yzq/zxinglibrary/bean/ZxingConfig.java
index faeca6a..ab3be6e 100644
--- a/zxinglibrary/src/main/java/com/yzq/zxinglibrary/bean/ZxingConfig.java
+++ b/zxinglibrary/src/main/java/com/yzq/zxinglibrary/bean/ZxingConfig.java
@@ -38,6 +38,8 @@ public class ZxingConfig implements Serializable {
     @ColorRes
     private int frameLineColor = -1;
 
+    private int cameraId;
+
 
     /*扫描线颜色*/
     @ColorRes
@@ -122,4 +124,12 @@ public boolean isShowAlbum() {
     public void setShowAlbum(boolean showAlbum) {
         isShowAlbum = showAlbum;
     }
+
+    public int getCameraId() {
+        return cameraId;
+    }
+
+    public void setCameraId(int cameraId) {
+        this.cameraId = cameraId;
+    }
 }
diff --git a/zxinglibrary/src/main/java/com/yzq/zxinglibrary/camera/CameraManager.java b/zxinglibrary/src/main/java/com/yzq/zxinglibrary/camera/CameraManager.java
index 9a97baf..1bfefa6 100644
--- a/zxinglibrary/src/main/java/com/yzq/zxinglibrary/camera/CameraManager.java
+++ b/zxinglibrary/src/main/java/com/yzq/zxinglibrary/camera/CameraManager.java
@@ -70,6 +70,9 @@ public CameraManager(Context context, ZxingConfig config) {
         this.configManager = new CameraConfigurationManager(context);
         previewCallback = new PreviewCallback(configManager);
         this.config = config;
+        if (config != null) {
+            setManualCameraId(config.getCameraId());
+        }
     }
 
 //    public static void init(Context context) {
@@ -248,14 +251,16 @@ public synchronized Rect getFramingRect() {
             }
 
             int screenResolutionX = screenResolution.x;
-
-            int width = (int) (screenResolutionX * 0.6);
+            int screenResolutionY = screenResolution.y;
+            // 取下最小值
+            int minWidth = Math.min(screenResolutionX, screenResolutionY);
+            int width = (int) (minWidth * 0.6);
             int height = width;
 
 
             /*水平居中  偏上显示*/
             int leftOffset = (screenResolution.x - width) / 2;
-            int topOffset = (screenResolution.y - height) / 5;
+            int topOffset = (screenResolution.y - height) / 2-80;
 
             framingRect = new Rect(leftOffset, topOffset, leftOffset + width,
                     topOffset + height);