diff --git a/src/main/java/com/budiyev/android/codescanner/BarcodeUtils.java b/src/main/java/com/budiyev/android/codescanner/BarcodeUtils.java
index 373eb9b..660bccd 100644
--- a/src/main/java/com/budiyev/android/codescanner/BarcodeUtils.java
+++ b/src/main/java/com/budiyev/android/codescanner/BarcodeUtils.java
@@ -121,8 +121,8 @@ public static Result decodeRgb(@NonNull final int[] pixels, final int width, fin
         Objects.requireNonNull(pixels);
         final MultiFormatReader reader = createReader(hints);
         try {
-            return Utils
-                    .decodeLuminanceSource(reader, new RGBLuminanceSource(width, height, pixels));
+            return Utils.decodeLuminanceSource(reader,
+                    new RGBLuminanceSource(width, height, pixels));
         } catch (final ReaderException e) {
             return null;
         }
@@ -291,8 +291,8 @@ private static MultiFormatReader createReader(@Nullable final Map<DecodeHintType
         if (hints != null) {
             reader.setHints(hints);
         } else {
-            reader.setHints(Collections
-                    .singletonMap(DecodeHintType.POSSIBLE_FORMATS, CodeScanner.ALL_FORMATS));
+            reader.setHints(Collections.singletonMap(DecodeHintType.POSSIBLE_FORMATS,
+                    CodeScanner.ALL_FORMATS));
         }
         return reader;
     }
diff --git a/src/main/java/com/budiyev/android/codescanner/CodeScannerView.java b/src/main/java/com/budiyev/android/codescanner/CodeScannerView.java
index 7d195f0..eee0119 100644
--- a/src/main/java/com/budiyev/android/codescanner/CodeScannerView.java
+++ b/src/main/java/com/budiyev/android/codescanner/CodeScannerView.java
@@ -213,7 +213,7 @@ private void initialize(@NonNull final Context context, @Nullable final Attribut
 
     @Override
     protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
-        int childCount = getChildCount();
+        final int childCount = getChildCount();
         if (childCount > MAX_CHILD_COUNT) {
             throw new IllegalStateException("CodeScannerView can have zero or one child");
         }
@@ -222,7 +222,7 @@ protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec
         measureChildWithMargins(mAutoFocusButton, widthMeasureSpec, 0, heightMeasureSpec, 0);
         measureChildWithMargins(mFlashButton, widthMeasureSpec, 0, heightMeasureSpec, 0);
         if (childCount == MAX_CHILD_COUNT) {
-            Rect frameRect = mViewFinderView.getFrameRect();
+            final Rect frameRect = mViewFinderView.getFrameRect();
             measureChildWithMargins(getChildAt(HINT_VIEW_INDEX), widthMeasureSpec, 0,
                     heightMeasureSpec, frameRect != null ? frameRect.getBottom() : 0);
         }
@@ -233,7 +233,7 @@ protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec
     @Override
     protected void onLayout(final boolean changed, final int left, final int top, final int right,
             final int bottom) {
-        int childCount = getChildCount();
+        final int childCount = getChildCount();
         if (childCount > MAX_CHILD_COUNT) {
             throw new IllegalStateException("CodeScannerView can have zero or one child");
         }
@@ -687,19 +687,19 @@ interface SizeListener {
 
     public static class LayoutParams extends MarginLayoutParams {
 
-        public LayoutParams(@NonNull Context c, @Nullable AttributeSet attrs) {
+        public LayoutParams(@NonNull final Context c, @Nullable final AttributeSet attrs) {
             super(c, attrs);
         }
 
-        public LayoutParams(int width, int height) {
+        public LayoutParams(final int width, final int height) {
             super(width, height);
         }
 
-        public LayoutParams(@NonNull MarginLayoutParams source) {
+        public LayoutParams(@NonNull final MarginLayoutParams source) {
             super(source);
         }
 
-        public LayoutParams(@NonNull ViewGroup.LayoutParams source) {
+        public LayoutParams(@NonNull final ViewGroup.LayoutParams source) {
             super(source);
         }
     }
diff --git a/src/main/java/com/budiyev/android/codescanner/ViewFinderView.java b/src/main/java/com/budiyev/android/codescanner/ViewFinderView.java
index b40d0b0..2ad2c11 100644
--- a/src/main/java/com/budiyev/android/codescanner/ViewFinderView.java
+++ b/src/main/java/com/budiyev/android/codescanner/ViewFinderView.java
@@ -60,7 +60,7 @@ public ViewFinderView(@NonNull final Context context) {
     }
 
     @Override
-    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+    protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
         invalidateFrameRect(getMeasuredWidth(), getMeasuredHeight());
     }