diff --git a/README.md b/README.md
index 83843ab..29442b2 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# PasscodeView
+# PasscodeView                                      <img id="badge" src="https://jitpack.io/v/JobGetabu/PasscodeView.svg">
 
 An Passcode view view for Android.
  
@@ -9,14 +9,27 @@ An Passcode view view for Android.
  <img src="https://github.com/hanks-zyh/PasscodeView/raw/master/screenshot/demo.gif" width="220px" style="margin: 20px;">
 </div>
 
-## Usage
+## Add 
 
 ```gradle
 dependencies {
-    compile 'com.hanks:passcodeview:0.1.2'
+    implementation 'com.github.JobGetabu:PasscodeView:0.1.3'
 }
 ```
 
+Add it in your root build.gradle at the end of repositories:
+
+```
+allprojects {
+		repositories {
+			...
+			maven { url 'https://jitpack.io' }
+		}
+	}
+ ```
+
+## Usage
+
 ```xml
 <com.hanks.passcodeview.PasscodeView
     android:id="@+id/passcodeView"
diff --git a/build.gradle b/build.gradle
index c421992..431c511 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:3.1.4'
         classpath 'com.novoda:bintray-release:0.7.0'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 3d64e73..defb267 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
diff --git a/passcodeview/build.gradle b/passcodeview/build.gradle
index 9d62380..22c43ae 100644
--- a/passcodeview/build.gradle
+++ b/passcodeview/build.gradle
@@ -1,11 +1,11 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 28
 
     defaultConfig {
         minSdkVersion 15
-        targetSdkVersion 26
+        targetSdkVersion 28
         versionCode 2
         versionName "0.1.2"
         vectorDrawables.useSupportLibrary = true
@@ -19,7 +19,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.android.support:appcompat-v7:26.1.0'
+    implementation 'com.android.support:appcompat-v7:28.0.0'
     testImplementation 'junit:junit:4.12'
 }
 
diff --git a/passcodeview/src/main/java/com/hanks/passcodeview/PasscodeView.java b/passcodeview/src/main/java/com/hanks/passcodeview/PasscodeView.java
index 3a196f1..ed307fd 100644
--- a/passcodeview/src/main/java/com/hanks/passcodeview/PasscodeView.java
+++ b/passcodeview/src/main/java/com/hanks/passcodeview/PasscodeView.java
@@ -9,6 +9,7 @@
 import android.support.annotation.IntDef;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
+import android.support.v7.content.res.AppCompatResources;
 import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.util.DisplayMetrics;
@@ -18,6 +19,7 @@
 import android.widget.FrameLayout;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
+import android.widget.RelativeLayout;
 import android.widget.TextView;
 
 import java.lang.annotation.Retention;
@@ -41,6 +43,7 @@ public class PasscodeView extends FrameLayout implements View.OnClickListener {
     private TextView number0, number1, number2, number3, number4, number5, number6, number7, number8, number9;
     private ImageView numberB, numberOK;
     private ImageView iv_lock, iv_ok;
+    private RelativeLayout relativeLayoutDraw;
     private View cursor;
 
     private String firstInputTip = "Enter a passcode of 4 digits";
@@ -99,6 +102,9 @@ private void init() {
         cursor = findViewById(R.id.cursor);
         iv_lock = (ImageView) findViewById(R.id.iv_lock);
         iv_ok = (ImageView) findViewById(R.id.iv_ok);
+        relativeLayoutDraw = (RelativeLayout) findViewById(R.id.rv_with_drawable);
+
+        relativeLayoutDraw.setBackgroundDrawable(AppCompatResources.getDrawable(getContext(),R.drawable.lock_bg_white));
 
         tv_input_tip.setText(firstInputTip);
 
diff --git a/passcodeview/src/main/res/layout/layout_passcode_view.xml b/passcodeview/src/main/res/layout/layout_passcode_view.xml
index 6daa418..413afaa 100644
--- a/passcodeview/src/main/res/layout/layout_passcode_view.xml
+++ b/passcodeview/src/main/res/layout/layout_passcode_view.xml
@@ -68,9 +68,9 @@
         android:layout_weight="1"/>
 
     <RelativeLayout
+        android:id="@+id/rv_with_drawable"
         android:layout_width="match_parent"
         android:layout_height="312dp"
-        android:background="@drawable/lock_bg_white"
         android:padding="48dp">
 
         <TextView
@@ -161,4 +161,4 @@
 
     </RelativeLayout>
 
-</LinearLayout>
\ No newline at end of file
+</LinearLayout>
diff --git a/sample/build.gradle b/sample/build.gradle
index 0bc0c86..efa23cd 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -1,11 +1,11 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 28
     defaultConfig {
         applicationId "com.hanks.demo"
         minSdkVersion 15
-        targetSdkVersion 26
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -24,8 +24,8 @@ dependencies {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
     implementation project(":passcodeview")
-    implementation 'com.android.support:appcompat-v7:26.1.0'
+    implementation 'com.android.support:appcompat-v7:28.0.0'
     implementation 'com.android.support.constraint:constraint-layout:1.0.2'
-    implementation 'com.android.support:design:26.1.0'
+    implementation 'com.android.support:design:28.0.0'
     testImplementation 'junit:junit:4.12'
 }
diff --git a/sample/src/main/java/com/hanks/demo/MainActivity.java b/sample/src/main/java/com/hanks/demo/MainActivity.java
index f020f04..ec85387 100644
--- a/sample/src/main/java/com/hanks/demo/MainActivity.java
+++ b/sample/src/main/java/com/hanks/demo/MainActivity.java
@@ -1,8 +1,8 @@
 package com.hanks.demo;
 
 import android.content.Intent;
-import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 
 public class MainActivity extends AppCompatActivity {