微信分享图片checkArgs fail, thumbData

产生错误的原因

微信限制了分享图片的大小(32K)

解决办法

  /**
     * Bitmap转换成byte[]并且进行压缩,压缩到不大于maxkb
     *
     * @param bitmap
     * @param maxKb
     * @return
     */
    public static byte[] bmpToByteArray(Bitmap bitmap, int maxKb) {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, output);
        int options = 100;
        while (output.toByteArray().length > maxkb && options != 10) {
            output.reset(); //清空output
            bitmap.compress(Bitmap.CompressFormat.JPEG, options, output);//这里压缩options%，把压缩后的数据存放到output中
            options -= 10;
        }
        return output.toByteArray();
    }

整体代码

  /**
     * 分享到微信
     */
    private void shareToWeChat() {
        Disposable disposable = Observable.create(new ObservableOnSubscribe<Bitmap>() {
            @Override
            public void subscribe(ObservableEmitter<Bitmap> e) throws Exception {
                Glide.with(mContext)
                        .load(mCollageDetailBean.getImg())
                        .asBitmap()
                        .centerCrop()
                        .override(200, 200)
                        .into(new SimpleTarget<Bitmap>() {
                            @Override
                            public void onResourceReady(Bitmap resource, GlideAnimation<? super Bitmap> glideAnimation) {
                                e.onNext(resource);
                            }
                        });
            }
        }).subscribeOn(io.reactivex.android.schedulers.AndroidSchedulers.mainThread())
                .map(new Function<Bitmap, byte[]>() {
                    @Override
                    public byte[] apply(Bitmap bitmap) throws Exception {
                        return bmpToByteArray(bitmap, 32);
                    }
                })
                .subscribeOn(io.reactivex.schedulers.Schedulers.io())
                .observeOn(io.reactivex.android.schedulers.AndroidSchedulers.mainThread())
                .subscribe(new Consumer<byte[]>() {
                    @Override
                    public void accept(byte[] bytes) throws Exception {
                        showLoading();
                        WXWebpageObject webpageUrl = new WXWebpageObject();
                        webpageUrl.webpageUrl = "分享的链接";
                        WXMediaMessage msg = new WXMediaMessage(webpageUrl);
                        msg.title = "分享的标题";
                        msg.description = "分享的说明内容";
                        msg.thumbData = bytes;                
                        SendMessageToWX.Req req = new SendMessageToWX.Req();
                        req.transaction = "";
                        req.message = msg;
                        req.scene = SendMessageToWX.Req.WXSceneSession;  // WXSceneSession会话  WXSceneTimeline朋友圈
                        String weixin_appid = Order365App.getInstance().getWEIXIN_APPID();
                        IWXAPI api = WXAPIFactory.createWXAPI(mContext, weixin_appid);
                        boolean b = api.sendReq(req);
                        if (!b) {
                            showError("分享失败");
                        }
                    }
                }, new Consumer<Throwable>() {
                    @Override
                    public void accept(Throwable throwable) throws Exception {
                        showLoading();
                        showError("分享失败");
                    }
                });

        addDisposable(disposable);
    }

这里用Glide去加载生成Bitmap是为了方便剪裁