diff --git a/alertview/build.gradle b/alertview/build.gradle
index 939852f..acae6e9 100644
--- a/alertview/build.gradle
+++ b/alertview/build.gradle
@@ -5,12 +5,12 @@ apply plugin: 'com.jfrog.bintray'
 version = "1.0.3"
 
 android {
-    compileSdkVersion 23
+    compileSdkVersion 29
     buildToolsVersion "23.0.3"
 
     defaultConfig {
-        minSdkVersion 9
-        targetSdkVersion 21
+        minSdkVersion 14
+        targetSdkVersion 29
         versionCode 1
         versionName "1.0"
     }
diff --git a/alertview/src/main/java/com/bigkoo/alertview/AlertViewAdapter.java b/alertview/src/main/java/com/bigkoo/alertview/AlertViewAdapter.java
index f24f620..3992474 100644
--- a/alertview/src/main/java/com/bigkoo/alertview/AlertViewAdapter.java
+++ b/alertview/src/main/java/com/bigkoo/alertview/AlertViewAdapter.java
@@ -1,5 +1,6 @@
 package com.bigkoo.alertview;
 
+import android.annotation.SuppressLint;
 import android.content.Context;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -34,6 +35,7 @@ public long getItemId(int position) {
         return position;
     }
 
+    @SuppressLint("InflateParams")
     @Override
     public View getView(int position, View convertView, ViewGroup parent) {
         String data= mDatas.get(position);
@@ -51,16 +53,16 @@ public View getView(int position, View convertView, ViewGroup parent) {
         holder.UpdateUI(parent.getContext(),data,position);
         return view;
     }
-    public Holder creatHolder(View view){
+    private Holder creatHolder(View view){
         return new Holder(view);
     }
     class Holder {
         private TextView tvAlert;
 
-        public Holder(View view){
+        Holder(View view){
             tvAlert = (TextView) view.findViewById(R.id.tvAlert);
         }
-        public void UpdateUI(Context context,String data,int position){
+        void UpdateUI(Context context, String data, int position){
             tvAlert.setText(data);
             if (mDestructive!= null && mDestructive.contains(data)){
                 tvAlert.setTextColor(context.getResources().getColor(R.color.textColor_alert_button_destructive));
diff --git a/alertview/src/main/java/com/bigkoo/alertview/OnDismissListener.java b/alertview/src/main/java/com/bigkoo/alertview/OnDismissListener.java
index a111690..3372098 100644
--- a/alertview/src/main/java/com/bigkoo/alertview/OnDismissListener.java
+++ b/alertview/src/main/java/com/bigkoo/alertview/OnDismissListener.java
@@ -1,10 +1,8 @@
 package com.bigkoo.alertview;
 
-import android.view.View;
-
 /**
  * Created by Sai on 15/8/9.
  */
 public interface OnDismissListener {
-    public void onDismiss(Object o);
+    void onDismiss(Object o);
 }
diff --git a/alertview/src/main/java/com/bigkoo/alertview/OnItemClickListener.java b/alertview/src/main/java/com/bigkoo/alertview/OnItemClickListener.java
index 074ea74..ea8ad32 100644
--- a/alertview/src/main/java/com/bigkoo/alertview/OnItemClickListener.java
+++ b/alertview/src/main/java/com/bigkoo/alertview/OnItemClickListener.java
@@ -1,10 +1,8 @@
 package com.bigkoo.alertview;
 
-import android.view.View;
-
 /**
  * Created by Sai on 15/8/9.
  */
 public interface OnItemClickListener {
-    public void onItemClick(Object o,int position);
+    void onItemClick(Object o, int position);
 }
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 2779066..6078414 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -6,7 +6,8 @@
         android:allowBackup="true"
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
-        android:theme="@style/AppTheme" >
+        android:theme="@style/AppTheme"
+        android:fullBackupContent="@xml/backup_descriptor">
         <activity
             android:name=".MainActivity"
             android:label="@string/app_name" >
diff --git a/app/src/main/res/xml/backup_descriptor.xml b/app/src/main/res/xml/backup_descriptor.xml
new file mode 100644
index 0000000..6fd6103
--- /dev/null
+++ b/app/src/main/res/xml/backup_descriptor.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<full-backup-content>
+    <!-- Exclude specific shared preferences that contain GCM registration Id -->
+</full-backup-content>