微信分享规则

针对微信分享时需要压缩图片到较小的图片尺寸并且需要设置缩略32k的限制. （注意：必须是32k的图片）

这里就不浪费时间说什么导入sdk什么的了官网都有说明

一、获取bitmap图片

这里我主要是获取网络图片转成bitmap的，我使用的是 Glide转成bitmap（楼主比较菜只能这样了，哈哈）当然你也可以试试其他的网络图片转Bitmap方法。

//1 Glide.with(mContext).asBitmap().load(fitnessBean.getFitnessIndexImg()).into(new SimpleTargetBitmap() {                    @Override                    public void onResourceReady(@NonNull Bitmap resource, @Nullable Transition? super Bitmap transition) {                    //2                        Bitmap thumbBmp = null;                        if (resource.getHeight()100 && resource.getWidth()100) {                            thumbBmp = Bitmap.createScaledBitmap(resource, 100, 100, true);                        }else {                            thumbBmp = resource;                        }                        if (thumbBmp != null) {                            dismissLoading();                            DialogUtils.shareDailog(mContext, url, "标题", "内容", thumbBmp);                        } else {                            dismissLoading();                            ToastUtils.showShort("获取分享图片失败");                        }                    }                });

二、将bitmap对象转化成byte数据字节

 public static byte[] bitmapBytes(final Bitmap bmp, final boolean needRecycle) {        int i;        int j;        if (bmp.getHeight()  bmp.getWidth()) {            i = bmp.getWidth();            j = bmp.getWidth();        } else {            i = bmp.getHeight();            j = bmp.getHeight();        }        Bitmap localBitmap = Bitmap.createBitmap(i, j, Bitmap.Config.RGB_565);        Canvas localCanvas = new Canvas(localBitmap);        while (true) {            localCanvas.drawBitmap(bmp, new Rect(0, 0, i, j), new Rect(0, 0,i, j), null);            if (needRecycle)                bmp.recycle();            ByteArrayOutputStream localByteArrayOutputStream = new ByteArrayOutputStream();            localBitmap.compress(Bitmap.CompressFormat.JPEG, 100,                    localByteArrayOutputStream);            localBitmap.recycle();            byte[] arrayOfByte = localByteArrayOutputStream.toByteArray();            try {                localByteArrayOutputStream.close();                return arrayOfByte;            } catch (Exception e) {                //F.out(e);            }            i = bmp.getHeight();            j = bmp.getHeight();        }    }

三、微信分享配置

/**     * 微信分享     * @param mContext     * @param url 地址     * @param title 标题     * @param desc 介绍     * @param isFriends朋友圈或好友     * @param img 图片     */ public static void wxShare(Context mContext, String url, String title, String desc, boolean isFriends, Bitmap img) {        WXWebpageObject webpage = new WXWebpageObject();        webpage.webpageUrl = url;        WXMediaMessage msg = new WXMediaMessage(webpage);        msg.title = title;        msg.description = desc;        msg.thumbData = bitmapBytes(img,true);        SendMessageToWX.Req req = new SendMessageToWX.Req();        req.transaction = String.valueOf(System.currentTimeMillis());        req.message = msg;        req.scene = friendsCircle ? SendMessageToWX.Req.WXSceneTimeline : SendMessageToWX.Req.WXSceneSession;        BaseApp.mWxApi.sendReq(req);    }