diff --git a/build.gradle b/build.gradle
index ba213bd..21dbf66 100644
--- a/build.gradle
+++ b/build.gradle
@@ -9,10 +9,9 @@ buildscript {
         }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.0'
-//        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.0'
-//        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
-//        classpath 'me.tatarka:gradle-retrolambda:3.2.5'
+        classpath 'com.android.tools.build:gradle:3.5.3'
+        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.0'
+        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
diff --git a/library/build.gradle b/library/build.gradle
index 19c5a68..9a2557a 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -1,4 +1,7 @@
 apply plugin: 'com.android.library'
+apply plugin: 'com.github.dcendents.android-maven'
+apply plugin: 'com.jfrog.bintray'
+version = "2.2.2"
 android {
     compileSdkVersion 28
     buildToolsVersion "28.0.3"
@@ -24,8 +27,83 @@ android {
 
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
-    implementation 'androidx.appcompat:appcompat:1.1.0'
-    implementation 'com.squareup.okhttp3:okhttp:3.14.2'
+    implementation 'com.android.support:appcompat-v7:28.0.0'
+    implementation 'com.squareup.okhttp3:okhttp:3.8.1'
     implementation 'org.greenrobot:eventbus:3.1.1'
 
 }
+def siteUrl = 'https://github.com/AlexLiuSheng/CheckVersionLib' // 项目的主页
+def gitUrl = 'https://github.com/AlexLiuSheng/CheckVersionLib.git' // Git仓库的url
+group = "com.allenliu.versionchecklib" // Maven Group ID for the artifact，一般填你唯一的包名
+install {
+    repositories.mavenInstaller {
+        // This generates POM.xml with proper parameters
+        pom {
+            project {
+                packaging 'aar'
+                // Add your description here
+                name 'a library that can auto check version on android  ' //项目描述
+                url siteUrl
+                // Set your license
+                licenses {
+                    license {
+                        name 'The Apache Software License, Version 2.0'
+                        url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
+                    }
+                }
+                developers {
+                    developer {
+                        id 'liusheng'    //填写的一些基本信息
+                        name 'AllenLiu'
+                        email '29949821@qq.com'
+                    }
+                }
+                scm {
+                    connection gitUrl
+                    developerConnection gitUrl
+                    url siteUrl
+                }
+            }
+        }
+    }
+}
+
+
+task sourcesJar(type: Jar) {
+    from android.sourceSets.main.java.srcDirs
+    classifier = 'sources'
+}
+task javadoc(type: Javadoc) {
+    options.encoding = "UTF-8"
+    source = android.sourceSets.main.java.srcDirs
+    classpath += project.files(android.getBootClasspath().join(File.pathSeparator))
+}
+task javadocJar(type: Jar, dependsOn: javadoc) {
+    classifier = 'javadoc'
+    from javadoc.destinationDir
+}
+artifacts {
+    archives javadocJar
+    archives sourcesJar
+}
+Properties properties = new Properties()
+properties.load(project.rootProject.file('local.properties').newDataInputStream())
+bintray {
+    user = properties.getProperty("bintray.user")
+    key = properties.getProperty("bintray.apiKey")
+    configurations = ['archives']
+    pkg {
+        repo = "maven"
+        name = "VersionCheckLib"    //发布到JCenter上的项目名字
+        websiteUrl = siteUrl
+        vcsUrl = gitUrl
+        licenses = ["Apache-2.0"]
+        publish = true
+    }
+}
+tasks.withType(Javadoc) {
+    options.addStringOption('Xdoclint:none', '-quiet')
+    options.addStringOption('encoding', 'UTF-8')
+    options.addStringOption('charSet', 'UTF-8')
+}
+
diff --git a/library/src/main/java/com/allenliu/versionchecklib/core/DownloadManager.java b/library/src/main/java/com/allenliu/versionchecklib/core/DownloadManager.java
index 77c4f11..bc92e6e 100644
--- a/library/src/main/java/com/allenliu/versionchecklib/core/DownloadManager.java
+++ b/library/src/main/java/com/allenliu/versionchecklib/core/DownloadManager.java
@@ -13,7 +13,8 @@
 import android.media.RingtoneManager;
 import android.net.Uri;
 import android.os.Build;
-import androidx.core.app.NotificationCompat;
+import android.support.v4.app.NotificationCompat;
+
 
 import com.allenliu.versionchecklib.R;
 import com.allenliu.versionchecklib.callback.DownloadListener;
diff --git a/library/src/main/java/com/allenliu/versionchecklib/core/PermissionDialogActivity.java b/library/src/main/java/com/allenliu/versionchecklib/core/PermissionDialogActivity.java
index feafe12..0fb3f8a 100644
--- a/library/src/main/java/com/allenliu/versionchecklib/core/PermissionDialogActivity.java
+++ b/library/src/main/java/com/allenliu/versionchecklib/core/PermissionDialogActivity.java
@@ -4,9 +4,9 @@
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.os.Bundle;
-import androidx.core.app.ActivityCompat;
-import androidx.core.content.ContextCompat;
-import androidx.appcompat.app.AppCompatActivity;
+
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.content.ContextCompat;
 import android.widget.Toast;
 
 import com.allenliu.versionchecklib.R;
diff --git a/library/src/main/java/com/allenliu/versionchecklib/core/VersionDialogActivity.java b/library/src/main/java/com/allenliu/versionchecklib/core/VersionDialogActivity.java
index cfe6ed6..a563c53 100644
--- a/library/src/main/java/com/allenliu/versionchecklib/core/VersionDialogActivity.java
+++ b/library/src/main/java/com/allenliu/versionchecklib/core/VersionDialogActivity.java
@@ -6,9 +6,10 @@
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.os.Bundle;
-import androidx.core.app.ActivityCompat;
-import androidx.core.content.ContextCompat;
-import androidx.appcompat.app.AlertDialog;
+
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.content.ContextCompat;
+import android.support.v7.app.AlertDialog;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
diff --git a/library/src/main/java/com/allenliu/versionchecklib/core/VersionFileProvider.java b/library/src/main/java/com/allenliu/versionchecklib/core/VersionFileProvider.java
index 1c50ab0..6c67935 100644
--- a/library/src/main/java/com/allenliu/versionchecklib/core/VersionFileProvider.java
+++ b/library/src/main/java/com/allenliu/versionchecklib/core/VersionFileProvider.java
@@ -1,6 +1,7 @@
 package com.allenliu.versionchecklib.core;
 
-import androidx.core.content.FileProvider;
+
+import android.support.v4.content.FileProvider;
 
 /**
  * Created by Allen Liu on 2017/2/28.
diff --git a/library/src/main/java/com/allenliu/versionchecklib/v2/AllenVersionChecker.java b/library/src/main/java/com/allenliu/versionchecklib/v2/AllenVersionChecker.java
index 66ae065..cb4b55b 100644
--- a/library/src/main/java/com/allenliu/versionchecklib/v2/AllenVersionChecker.java
+++ b/library/src/main/java/com/allenliu/versionchecklib/v2/AllenVersionChecker.java
@@ -1,8 +1,8 @@
 package com.allenliu.versionchecklib.v2;
 
 import android.content.Context;
+import android.support.annotation.Nullable;
 
-import androidx.annotation.Nullable;
 
 import com.allenliu.versionchecklib.core.http.AllenHttp;
 import com.allenliu.versionchecklib.utils.AllenEventBusUtil;
diff --git a/library/src/main/java/com/allenliu/versionchecklib/v2/builder/DownloadBuilder.java b/library/src/main/java/com/allenliu/versionchecklib/v2/builder/DownloadBuilder.java
index 873105f..e0d60f2 100644
--- a/library/src/main/java/com/allenliu/versionchecklib/v2/builder/DownloadBuilder.java
+++ b/library/src/main/java/com/allenliu/versionchecklib/v2/builder/DownloadBuilder.java
@@ -3,7 +3,8 @@
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
-import androidx.annotation.NonNull;
+import android.support.annotation.NonNull;
+
 
 import com.allenliu.versionchecklib.callback.APKDownloadListener;
 import com.allenliu.versionchecklib.callback.CommitClickListener;
diff --git a/library/src/main/java/com/allenliu/versionchecklib/v2/callback/RequestVersionListener.java b/library/src/main/java/com/allenliu/versionchecklib/v2/callback/RequestVersionListener.java
index bc59d0a..bae218a 100644
--- a/library/src/main/java/com/allenliu/versionchecklib/v2/callback/RequestVersionListener.java
+++ b/library/src/main/java/com/allenliu/versionchecklib/v2/callback/RequestVersionListener.java
@@ -1,6 +1,6 @@
 package com.allenliu.versionchecklib.v2.callback;
 
-import androidx.annotation.Nullable;
+import android.support.annotation.Nullable;
 
 import com.allenliu.versionchecklib.v2.builder.DownloadBuilder;
 import com.allenliu.versionchecklib.v2.builder.UIData;
diff --git a/library/src/main/java/com/allenliu/versionchecklib/v2/ui/AllenBaseActivity.java b/library/src/main/java/com/allenliu/versionchecklib/v2/ui/AllenBaseActivity.java
index eb6f2c4..d157c00 100644
--- a/library/src/main/java/com/allenliu/versionchecklib/v2/ui/AllenBaseActivity.java
+++ b/library/src/main/java/com/allenliu/versionchecklib/v2/ui/AllenBaseActivity.java
@@ -6,9 +6,8 @@
 import android.os.Build;
 import android.os.Bundle;
 
-import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-
+import android.support.annotation.Nullable;
+import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.WindowManager;
diff --git a/library/src/main/java/com/allenliu/versionchecklib/v2/ui/DownloadFailedActivity.java b/library/src/main/java/com/allenliu/versionchecklib/v2/ui/DownloadFailedActivity.java
index f02f526..b406705 100644
--- a/library/src/main/java/com/allenliu/versionchecklib/v2/ui/DownloadFailedActivity.java
+++ b/library/src/main/java/com/allenliu/versionchecklib/v2/ui/DownloadFailedActivity.java
@@ -2,9 +2,9 @@
 
 import android.app.Dialog;
 import android.content.DialogInterface;
-import androidx.appcompat.app.AlertDialog;
-import androidx.appcompat.app.AppCompatActivity;
+
 import android.os.Bundle;
+import android.support.v7.app.AlertDialog;
 import android.view.View;
 
 import com.allenliu.versionchecklib.R;
diff --git a/library/src/main/java/com/allenliu/versionchecklib/v2/ui/DownloadingActivity.java b/library/src/main/java/com/allenliu/versionchecklib/v2/ui/DownloadingActivity.java
index 3d1a19a..2db79f5 100644
--- a/library/src/main/java/com/allenliu/versionchecklib/v2/ui/DownloadingActivity.java
+++ b/library/src/main/java/com/allenliu/versionchecklib/v2/ui/DownloadingActivity.java
@@ -3,9 +3,9 @@
 import android.app.Dialog;
 import android.content.DialogInterface;
 
-import androidx.appcompat.app.AlertDialog;
-import androidx.appcompat.app.AppCompatActivity;
+
 import android.os.Bundle;
+import android.support.v7.app.AlertDialog;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.ProgressBar;
diff --git a/library/src/main/java/com/allenliu/versionchecklib/v2/ui/NotificationHelper.java b/library/src/main/java/com/allenliu/versionchecklib/v2/ui/NotificationHelper.java
index 9047a31..7322a85 100644
--- a/library/src/main/java/com/allenliu/versionchecklib/v2/ui/NotificationHelper.java
+++ b/library/src/main/java/com/allenliu/versionchecklib/v2/ui/NotificationHelper.java
@@ -11,9 +11,9 @@
 import android.media.RingtoneManager;
 import android.net.Uri;
 import android.os.Build;
+import android.support.annotation.RequiresApi;
+import android.support.v4.app.NotificationCompat;
 
-import androidx.annotation.RequiresApi;
-import androidx.core.app.NotificationCompat;
 
 import com.allenliu.versionchecklib.R;
 import com.allenliu.versionchecklib.core.PermissionDialogActivity;
diff --git a/library/src/main/java/com/allenliu/versionchecklib/v2/ui/UIActivity.java b/library/src/main/java/com/allenliu/versionchecklib/v2/ui/UIActivity.java
index 2c32368..bc11135 100644
--- a/library/src/main/java/com/allenliu/versionchecklib/v2/ui/UIActivity.java
+++ b/library/src/main/java/com/allenliu/versionchecklib/v2/ui/UIActivity.java
@@ -3,7 +3,8 @@
 import android.app.Dialog;
 import android.content.DialogInterface;
 import android.os.Bundle;
-import androidx.appcompat.app.AlertDialog;
+
+import android.support.v7.app.AlertDialog;
 import android.view.View;
 
 import com.allenliu.versionchecklib.R;
diff --git a/library/src/main/java/com/allenliu/versionchecklib/v2/ui/VersionService.java b/library/src/main/java/com/allenliu/versionchecklib/v2/ui/VersionService.java
index 6d7343d..939bc40 100644
--- a/library/src/main/java/com/allenliu/versionchecklib/v2/ui/VersionService.java
+++ b/library/src/main/java/com/allenliu/versionchecklib/v2/ui/VersionService.java
@@ -8,10 +8,9 @@
 import android.content.ServiceConnection;
 import android.os.Build;
 import android.os.IBinder;
+import android.support.annotation.Nullable;
+import android.support.annotation.WorkerThread;
 
-import androidx.annotation.Nullable;
-import androidx.annotation.WorkerThread;
-import androidx.core.app.NotificationCompat;
 
 import com.allenliu.versionchecklib.R;
 import com.allenliu.versionchecklib.callback.DownloadListener;
diff --git a/settings.gradle b/settings.gradle
index 0b07bb6..4ac2fa5 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1 +1 @@
-include ':library', "sample"
+include ':library',':sample'