diff --git a/android/src/main/java/com/wechatlib/WeChatLibModule.java b/android/src/main/java/com/wechatlib/WeChatLibModule.java
index 3663186..8a00f2b 100644
--- a/android/src/main/java/com/wechatlib/WeChatLibModule.java
+++ b/android/src/main/java/com/wechatlib/WeChatLibModule.java
@@ -6,6 +6,7 @@ import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.net.Uri;
 import android.os.Environment;
+import android.util.Base64;
 
 import androidx.annotation.Nullable;
 import androidx.core.content.FileProvider;
@@ -25,11 +26,17 @@ import com.facebook.imagepipeline.request.ImageRequestBuilder;
 import com.facebook.react.bridge.Arguments;
 import com.facebook.react.bridge.Callback;
 import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.bridge.ReactContext;
 import com.facebook.react.bridge.ReactContextBaseJavaModule;
 import com.facebook.react.bridge.ReactMethod;
 import com.facebook.react.bridge.ReadableMap;
 import com.facebook.react.bridge.WritableMap;
 import com.facebook.react.modules.core.DeviceEventManagerModule;
+import com.facebook.react.modules.core.RCTNativeAppEventEmitter;
+import com.tencent.mm.opensdk.diffdev.DiffDevOAuthFactory;
+import com.tencent.mm.opensdk.diffdev.IDiffDevOAuth;
+import com.tencent.mm.opensdk.diffdev.OAuthErrCode;
+import com.tencent.mm.opensdk.diffdev.OAuthListener;
 import com.tencent.mm.opensdk.modelbase.BaseReq;
 import com.tencent.mm.opensdk.modelbase.BaseResp;
 import com.tencent.mm.opensdk.modelbiz.ChooseCardFromWXCardPackage;
@@ -149,6 +156,42 @@ public class WeChatLibModule extends ReactContextBaseJavaModule implements IWXAP
         }
     }
 
+  private void sendEvent(ReactContext reactContext, String eventName, WritableMap params) {
+    reactContext.getJSModule(RCTNativeAppEventEmitter.class).emit(eventName, params);
+  }
+
+  @ReactMethod
+  public void authByScan(String appid, String nonceStr, String timeStamp, String scope, String signature, String schemeData, final Callback callback) {
+    if (api == null) {
+      callback.invoke(NOT_REGISTERED);
+      return;
+    }
+
+    IDiffDevOAuth oauth = DiffDevOAuthFactory.getDiffDevOAuth();
+    oauth.stopAuth();
+    oauth.auth(appid, scope, nonceStr, timeStamp, signature, new OAuthListener() {
+      @Override
+      public void onAuthGotQrcode(String var1, byte[] var2){
+        WritableMap map = Arguments.createMap();
+        String base64String = Base64.encodeToString(var2, Base64.DEFAULT);
+        map.putString("qrcode", base64String);
+        sendEvent(getReactApplicationContext(), "onAuthGotQrcode", map);
+      }
+
+      @Override
+      public void onQrcodeScanned() {
+
+      }
+      @Override
+      public void onAuthFinish(OAuthErrCode var1, String var2){
+        WritableMap map = Arguments.createMap();
+        map.putString("authCode", var2);
+        map.putInt("errCode", var1.getCode());
+        callback.invoke(map);
+      }
+    });
+  }
+
     @ReactMethod
     public void registerApp(String appid, String universalLink, Callback callback) {
         this.appId = appid;