diff --git a/pinentryedittext/src/main/java/com/alimuzaffar/lib/pin/PinEntryEditText.java b/pinentryedittext/src/main/java/com/alimuzaffar/lib/pin/PinEntryEditText.java
index 09e4952..df205b2 100755
--- a/pinentryedittext/src/main/java/com/alimuzaffar/lib/pin/PinEntryEditText.java
+++ b/pinentryedittext/src/main/java/com/alimuzaffar/lib/pin/PinEntryEditText.java
@@ -15,28 +15,16 @@
  */
 package com.alimuzaffar.lib.pin;
 
-import android.animation.Animator;
-import android.animation.AnimatorSet;
-import android.animation.ValueAnimator;
+import android.animation.*;
 import android.content.Context;
 import android.content.res.ColorStateList;
 import android.content.res.TypedArray;
-import android.graphics.Canvas;
-import android.graphics.Color;
-import android.graphics.Paint;
-import android.graphics.Rect;
-import android.graphics.RectF;
-import android.graphics.Typeface;
+import android.graphics.*;
 import android.graphics.drawable.Drawable;
-import android.text.InputFilter;
-import android.text.InputType;
-import android.text.TextUtils;
+import android.text.*;
 import android.util.AttributeSet;
 import android.util.TypedValue;
-import android.view.ActionMode;
-import android.view.Menu;
-import android.view.MenuItem;
-import android.view.View;
+import android.view.*;
 import android.view.animation.OvershootInterpolator;
 import android.view.inputmethod.InputMethodManager;
 
@@ -46,8 +34,9 @@
 import androidx.core.view.ViewCompat;
 
 public class PinEntryEditText extends AppCompatEditText {
-    private static final String XML_NAMESPACE_ANDROID = "http://schemas.android.com/apk/res/android";
 
+    private static final String XML_NAMESPACE_ANDROID = "http://schemas.android.com/apk/res/android";
+    private static final int DEFAULT_MAX_LENGTH = 4;
     public static final String DEFAULT_MASK = "\u25CF";
 
     protected String mMask = null;
@@ -56,9 +45,9 @@ public class PinEntryEditText extends AppCompatEditText {
     protected int mAnimatedType = 0;
     protected float mSpace = 24; //24 dp by default, space between the lines
     protected float mCharSize;
-    protected float mNumChars = 4;
+    protected float mNumChars = DEFAULT_MAX_LENGTH;
     protected float mTextBottomPadding = 8; //8dp by default, height of the text from our lines
-    protected int mMaxLength = 4;
+    protected int mMaxLength = DEFAULT_MAX_LENGTH;
     protected RectF[] mLineCoords;
     protected float[] mCharBottom;
     protected Paint mCharPaint;
@@ -176,7 +165,7 @@ private void init(Context context, AttributeSet attrs) {
 
         setBackgroundResource(0);
 
-        mMaxLength = attrs.getAttributeIntValue(XML_NAMESPACE_ANDROID, "maxLength", 4);
+        mMaxLength = getAndroidAttributeIntValue(attrs, "maxLength", DEFAULT_MAX_LENGTH);
         mNumChars = mMaxLength;
 
         //Disable copy paste
@@ -232,6 +221,15 @@ public boolean onLongClick(View v) {
         mAnimate = mAnimatedType > -1;
     }
 
+    private int getAndroidAttributeIntValue(AttributeSet attrs, String attributeName, int defaultValue) {
+        int resId = attrs.getAttributeResourceValue(XML_NAMESPACE_ANDROID, attributeName, -1);
+        if (resId > 0) {
+            return getResources().getInteger(resId);
+        } else {
+            return attrs.getAttributeIntValue(XML_NAMESPACE_ANDROID, attributeName, defaultValue);
+        }
+    }
+
     @Override
     public void setInputType(int type) {
         super.setInputType(type);
@@ -626,4 +624,4 @@ public void setOnPinEnteredListener(OnPinEnteredListener l) {
     public interface OnPinEnteredListener {
         void onPinEntered(CharSequence str);
     }
-}
\ No newline at end of file
+}
diff --git a/sample-app/src/main/res/layout/activity_edit_text.xml b/sample-app/src/main/res/layout/activity_edit_text.xml
index b725766..4e77eee 100755
--- a/sample-app/src/main/res/layout/activity_edit_text.xml
+++ b/sample-app/src/main/res/layout/activity_edit_text.xml
@@ -44,7 +44,7 @@
             android:cursorVisible="false"
             android:digits="1234567890"
             android:inputType="number"
-            android:maxLength="6"
+            android:maxLength="@integer/pin_length"
             android:textIsSelectable="false"
             android:textSize="24dp"
             app:pinAnimationType="fromBottom"
@@ -98,4 +98,4 @@
             app:pinLineColors="@color/pin_line_colors"
             app:pinRepeatedHint="#" />
     </LinearLayout>
-</ScrollView>
\ No newline at end of file
+</ScrollView>
diff --git a/sample-app/src/main/res/values/integers.xml b/sample-app/src/main/res/values/integers.xml
new file mode 100644
index 0000000..c5eb328
--- /dev/null
+++ b/sample-app/src/main/res/values/integers.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <integer name="pin_length">6</integer>
+</resources>