update 更新

@@ -3,6 +3,7 @@ package com.theweflex.react;
 import android.content.Context;
 import android.content.Intent;
 import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.net.Uri;
 import android.support.annotation.Nullable;
 
@@ -46,6 +47,7 @@ import com.tencent.mm.opensdk.openapi.IWXAPI;
 import com.tencent.mm.opensdk.openapi.IWXAPIEventHandler;
 import com.tencent.mm.opensdk.openapi.WXAPIFactory;
 
+import java.io.ByteArrayOutputStream;
 import java.util.ArrayList;
 import java.util.UUID;
 
@@ -60,6 +62,46 @@ public class WeChatModule extends ReactContextBaseJavaModule implements IWXAPIEv
     private final static String INVOKE_FAILED = "WeChat API invoke returns false.";
     private final static String INVALID_ARGUMENT = "invalid argument.";
 
+
+    // 缩略图大小 kb
+    private final static int THUMB_SIZE = 32;
+
+    private static byte[] bitmapTopBytes(Bitmap bitmap) {
+          ByteArrayOutputStream baos = new ByteArrayOutputStream();
+          bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
+          bitmap.recycle();
+          return baos.toByteArray();
+    }
+    private static byte[] bitmapResizeGetBytes(Bitmap image, int size) {
+        // little-snow-fox 2019.10.20
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        // 质量压缩方法，这里100表示第一次不压缩，把压缩后的数据缓存到 baos
+        image.compress(Bitmap.CompressFormat.JPEG, 100, baos);
+        int options = 100;
+
+
+        // 循环判断压缩后依然大于 32kb 则继续压缩
+        while (baos.toByteArray().length / 1024 > size) {
+            // 重置baos即清空baos
+            baos.reset();
+            if (options > 10) {
+                options -= 8;
+            } else {
+                return bitmapResizeGetBytes(Bitmap.createScaledBitmap(image, 280, image.getHeight() / image.getWidth() * 280, true), size);
+            }
+            // 这里压缩options%，把压缩后的数据存放到baos中
+            image.compress(Bitmap.CompressFormat.JPEG, options, baos);
+        }
+        return baos.toByteArray();
+    }
+
+    private Bitmap Bytes2Bimap(byte[] b) {
+        if (b.length != 0) {
+            return BitmapFactory.decodeByteArray(b, 0, b.length);
+        } else {
+            return null;
+        }
+    }
     public WeChatModule(ReactApplicationContext context) {
         super(context);
     }
@@ -425,6 +467,7 @@ public class WeChatModule extends ReactContextBaseJavaModule implements IWXAPIEv
         message.mediaObject = mediaObject;
 
         if (thumbImage != null) {
+            thumbImage=Bytes2Bimap(bitmapResizeGetBytes(thumbImage, THUMB_SIZE));
             message.setThumbImage(thumbImage);
         }
         if (data.hasKey("title")) {