diff --git a/GameSDKDemo/build.gradle b/GameSDKDemo/build.gradle
index 0f4c778..918ef25 100644
--- a/GameSDKDemo/build.gradle
+++ b/GameSDKDemo/build.gradle
@@ -36,7 +36,7 @@ repositories {
 }
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 27
     buildToolsVersion '28.0.3'
 
     signingConfigs {
@@ -51,6 +51,7 @@ android {
     defaultConfig {
         minSdkVersion 14
         targetSdkVersion 27
+        applicationId "mx.she.rd4"
         versionCode 6
         versionName "1.4"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -69,7 +70,10 @@ android {
     lintOptions {
         abortOnError false
     }
-
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_7
+        targetCompatibility JavaVersion.VERSION_1_7
+    }
     applicationVariants.all {
         variant ->
             variant.outputs.all {
@@ -81,12 +85,12 @@ android {
 
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
-    implementation 'com.android.support:support-v4:26.1.0'
+    implementation 'com.android.support:support-v4:27.1.1'
     testImplementation 'junit:junit:4.12'
-    implementation 'com.android.support:appcompat-v7:26.1.0'
-    implementation 'com.android.support:design:26.1.0'
+    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'com.android.support:design:27.1.1'
 //    implementation project(':GameSDK')
 //    implementation project(':IAP5Helper')
-    implementation 'com.gumptech.sdk:GameSDK:4.7.0'
+    implementation 'com.gumptech.sdk:GameSDK:4.7.1'
 //    implementation 'com.gumptech.sdk:SamsungIAP:5.1.1'
 }
diff --git a/GameSDKDemo/src/main/java/com/gumptech/sdk/demo/MainActivity.java b/GameSDKDemo/src/main/java/com/gumptech/sdk/demo/MainActivity.java
index 94208b6..bba4002 100644
--- a/GameSDKDemo/src/main/java/com/gumptech/sdk/demo/MainActivity.java
+++ b/GameSDKDemo/src/main/java/com/gumptech/sdk/demo/MainActivity.java
@@ -35,8 +35,8 @@ public class MainActivity extends AppCompatActivity implements PurchaseCallback
     private Button btnPay;
     private Button btnIap;
 
-    private String appId = "100";
-    private String appKey = "f899139df5e1059396431415e770c6dd";
+    private String appId = "10036";
+    private String appKey = "7c127e0c66f06e58c7c7310a7c6fa488";
     private GumpUser gumpUser;
 
     /**
@@ -44,7 +44,6 @@ public class MainActivity extends AppCompatActivity implements PurchaseCallback
      */
     String serverId = "100";
     String roleId = "41080";
-    String product = "test";
 
 
     @Override
@@ -270,7 +269,7 @@ public class MainActivity extends AppCompatActivity implements PurchaseCallback
 
     @Override
     public void onPurchaseError(int code, String msg) {
-        Log.i(TAG, "purchase error");
+        Log.i(TAG, "purchase error:"+code+","+msg);
     }
 
     @Override
diff --git a/GameSDKDemo/src/main/java/com/gumptech/sdk/demo/PaymentInfoSubmitFragment.java b/GameSDKDemo/src/main/java/com/gumptech/sdk/demo/PaymentInfoSubmitFragment.java
index e205061..ab05d43 100644
--- a/GameSDKDemo/src/main/java/com/gumptech/sdk/demo/PaymentInfoSubmitFragment.java
+++ b/GameSDKDemo/src/main/java/com/gumptech/sdk/demo/PaymentInfoSubmitFragment.java
@@ -7,7 +7,6 @@ import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.design.widget.TextInputLayout;
 import android.support.v4.app.DialogFragment;
-import android.support.v4.app.Fragment;
 import android.text.Editable;
 import android.text.TextUtils;
 import android.text.TextWatcher;
@@ -15,9 +14,7 @@ import android.view.LayoutInflater;
 import android.view.View;
 
 
-/**
- * A simple {@link Fragment} subclass.
- */
+
 public class PaymentInfoSubmitFragment extends DialogFragment {
 
     interface OnSubmitListener {
@@ -33,9 +30,7 @@ public class PaymentInfoSubmitFragment extends DialogFragment {
             etRoleId,
             etExtra;
 
-    public PaymentInfoSubmitFragment() {
 
-    }
 
     public static PaymentInfoSubmitFragment newInstance(OnSubmitListener listener) {
         PaymentInfoSubmitFragment fragment = new PaymentInfoSubmitFragment();
diff --git a/README.md b/README.md
index 00b72ad..bf3987d 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,8 @@
 # Gump SDK 4 for Android接入文档
 
 
-V4.7.0       
-2019年02月21日
+V4.7.1       
+2019年03月19日
 
 
 ## 版本概述
@@ -21,7 +21,7 @@ V4.7.0
     	}
     }
     dependencies {
-        implementation 'com.gumptech.sdk:GameSDK:4.7.0'
+        implementation 'com.gumptech.sdk:GameSDK:4.7.1'
 
     }