Android微信分享图片按质量压缩的解决方案

微信分享图片的迷之bug，前一阵子接盘一个Hybrid App，分享要用原生的分享，搞了一阵子把微信分享搞上，测试又反馈了一个谜一样的Bug，我这边看Log打印了checkArgs fail, thumbData is invalid，google一番都说是图片不能超过32kb，在分享里面看到如下判断this.thumbData.length > '耀'，一时间没有反应过来。。。可是怎么压缩好哇，我参照官方Demo和AndroidUtilCode的按质量压缩方法，找出了下面的解决方案，供大家参考。

保存到本地在操作真心感觉麻烦

public static byte[] getHtmlByteArray(final String url) {
    URL htmlUrl = null;
    InputStream inStream = null;
    try {
        htmlUrl = new URL(url);
        URLConnection connection = htmlUrl.openConnection();
        HttpURLConnection httpConnection = (HttpURLConnection) connection;
        int responseCode = httpConnection.getResponseCode();
        if (responseCode == HttpURLConnection.HTTP_OK) {
            inStream = httpConnection.getInputStream();
        }
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    // 将io流转为byte数组
    byte[] data = inputStreamToByte(inStream);
    // 转换为bitmap
    Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);

    // 获取压缩后的byte数组
    byte[] bytes = compressByQuality(bitmap, '耀', true);

    return bytes;
}

public static byte[] inputStreamToByte(InputStream is) {
    try {
        ByteArrayOutputStream bytestream = new ByteArrayOutputStream();
        int ch;
        while ((ch = is.read()) != -1) {
            bytestream.write(ch);
        }
        byte imgdata[] = bytestream.toByteArray();
        bytestream.close();
        return imgdata;
    } catch (Exception e) {
        e.printStackTrace();
    }

    return null;
}

/**
    * 按质量压缩图片
    *
    * @param src         bitmap图片
    * @param maxByteSize 最大字节数
    * @param recycle
    * @return
    */
public static byte[] compressByQuality(final Bitmap src, final long maxByteSize, final boolean recycle) {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    src.compress(CompressFormat.JPEG, 100, baos);
    byte[] bytes;
    if (baos.size() <= maxByteSize) {
        bytes = baos.toByteArray();
    } else {
        baos.reset();
        src.compress(CompressFormat.JPEG, 0, baos);
        if (baos.size() >= maxByteSize) {
            bytes = baos.toByteArray();
        } else {
            // find the best quality using binary search
            int st = 0;
            int end = 100;
            int mid = 0;
            while (st < end) {
                mid = (st + end) / 2;
                baos.reset();
                src.compress(CompressFormat.JPEG, mid, baos);
                int len = baos.size();
                if (len == maxByteSize) {
                    break;
                } else if (len > maxByteSize) {
                    end = mid - 1;
                } else {
                    st = mid + 1;
                }
            }
            if (end == mid - 1) {
                baos.reset();
                src.compress(CompressFormat.JPEG, st, baos);
            }
            bytes = baos.toByteArray();
        }
    }
    if (recycle && !src.isRecycled()) src.recycle();
    return bytes;
}

WXWebpageObject object = new WXWebpageObject();
object.webpageUrl = url;
WXMediaMessage wxMediaMessage = new WXMediaMessage(object);
// 标题
wxMediaMessage.title = title;
// 描述
wxMediaMessage.description = des.substring(0, 20);
// 图片
wxMediaMessage.thumbData = Util.getHtmlByteArray(image);
//构造一个Req
SendMessageToWX.Req req = new SendMessageToWX.Req();
req.transaction = String.valueOf(System.currentTimeMillis());
req.message = wxMediaMessage;
req.scene = SendMessageToWX.Req.WXSceneSession;
mIWXAPI.sendReq(req);

WechatShareUtil类

https://github.com/sdwfqin/AndroidQuick

张钦，原文地址