android 分享bitmap到微信

微信分享文档【https://developers.weixin.qq.com/doc/oplatform/Mobile_App/Share_and_Favorites/Android.html
】
引用：

implementation 'com.tencent.mm.opensdk:wechat-sdk-android-without-mta:+'

分享代码：

val bmp = PublicTools.tools.createBitmapFromView(llPostLay)
 bmp?.let {
        val api = WXAPIFactory.createWXAPI(context, MyParms.APPID)
        val imgObj = WXImageObject(it)

        val msg = WXMediaMessage()
        msg.mediaObject = imgObj
        msg.thumbData = PublicTools.tools.bmpToByteArray(it,32)

        val req = SendMessageToWX.Req()
        req.transaction = PublicTools.tools.buildTransaction("img")
        req.message = msg
        //微信朋友：SendMessageToWX.Req.WXSceneSession
        //微信圈：SendMessageToWX.Req.WXSceneTimeline
        req.scene = SendMessageToWX.Req.WXSceneTimeline
        api.sendReq(req)
  }

msg.thumbData = PublicTools.tools.bmpToByteArray(it,32)需要注意不能大于32K

/**
     * Bitmap转换成byte[]并且进行压缩,压缩到不大于maxkb
     * @param bitmap
     * @param maxkb
     * @return
     */
    fun bmpToByteArray(bitmap: Bitmap, maxkb: Int): ByteArray? {
        val output = ByteArrayOutputStream()
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, output)
        var options = 100
        while (output.toByteArray().size > 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
        }
        bitmap.recycle()
        return output.toByteArray()
    }