api = WXAPIFactory.createWXAPI(this, Constants.WECHAT_APPID);
    weChatHandler = new WechatHandler(); //WechatHandler is imlemented by  WXAPIEventHandler
    api.handleIntent(getIntent(), weChatHandler);

Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.abt_image);

            //Init a WXImageObject object
            WXImageObject imgObj = new WXImageObject(bmp);
            Bit

            WXMediaMessage msg = new WXMediaMessage();
            msg.mediaObject = imgObj;
            Bitmap thumbBmp = Bitmap.createScaledBitmap(bmp, 50, 50, true);
            bmp.recycle();
            msg.thumbData = Utils.bmpToByteArray(thumbBmp, true); //set the thumbnail
            SendMessageToWX.Req req = new SendMessageToWX.Req();
            req.transaction = buildTransaction("img");
            req.message = msg;
            req.scene = SendMessageToWX.Req.WXSceneSession;
            api.sendReq(req);