image.png
第一步：url转换为bitmap
val imgPath = "/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=1332951276,3206293713&fm=26&gp=0.jpg"
object : AsyncTask(){
override fun doInBackground(vararg params: Void?): Bitmap {
//调用下面的方法getBitmap,传入线上图片url路径
return ImageLoadUtils.getBitmap("上下文",imgPath)
}
override fun onPostExecute(result: Bitmap?) {
super.onPostExecute(result)
result?.let {
PublicTools.tools.shareToWxProudct("上下文","分享小程序页面路径及拼接参数",it)
}
}
}.execute()
//url转bitmap
public static Bitmap getBitmap(String urlpath) {
Bitmap bm = null;
try {
URL iconUrl = new URL(urlpath);
URLConnection conn = iconUrl.openConnection();
HttpURLConnection http = (HttpURLConnection) conn;
int length = http.getContentLength();
conn.connect();
// 获得图像的字符流
InputStream is = conn.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is, length);
bm = BitmapFactory.decodeStream(bis);
bis.close();
is.close();// 关闭流
}
catch (Exception e) {
e.printStackTrace();
}
return bm;
}
第二步：先对bitmap进行处理(drawWXMiniBitmap)，再判断得到的bitmap是否大于128k(createBitmapThumbnail),
public static Bitmap drawWXMiniBitmap(Bitmap bitmap, int width, int height) {
Bitmap mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
// 用这个Bitmap生成一个Canvas,然后canvas就会把内容绘制到上面这个bitmap中
Canvas mCanvas = new Canvas(mBitmap);
// 绘制画笔
Paint mPicturePaint = new Paint();
// 绘制背景图片
mCanvas.drawBitmap(mBitmap, 0.0f, 0.0f, mPicturePaint);
// 绘制图片的宽、高
int width_head = bitmap.getWidth();
int height_head = bitmap.getHeight();
// 绘制图片－－保证其在水平方向居中
mCanvas.drawBitmap(bitmap, (width - width_head) / 2, (height - height_head) / 2,
mPicturePaint);
// 保存绘图为本地图片
mCanvas.save();
mCanvas.restore();
return mBitmap;
}
/**
* 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[] createBitmapThumbnail(Bitmap bitmap, int maxKb) {
ByteArrayOutputStream output = new ByteArrayOutputStream();
press(pressFormat.PNG, 100, output);
int options = 100;
while (output.toByteArray().length > maxKb && options != 10) {
output.reset();
press(pressFormat.JPEG, options, output);
options -= 10;
}
return output.toByteArray();
}
第三步：申请配置微信开放平台的appid，再到微信公众平台拿小程序的原始id，最后拉起微信，并分享出去
val appId = MyParms.APP_ID // 填应用AppId
val api = WXAPIFactory.createWXAPI(this, appId)
val miniProgramObj = WXMiniProgramObject()
miniProgramObj.webpageUrl = " " // 兼容低版本的网页链接
// 正式版:0，测试版:1，体验版:2
miniProgramObj.miniprogramType = WXMiniProgramObject.MINIPTOGRAM_TYPE_RELEASE
miniProgramObj.userName = MyParms.WX_SMALL_PROGRAM // 小程序原始id
//小程序页面路径；对于小游戏，可以只传入 query 部分，来实现传参效果，如：传入 "?foo=bar"
miniProgramObj.path = "pages/cardDetail/cardDetail?pcid=$cardId"
val msg = WXMediaMessage(miniProgramObj)
msg.title = "您赞，就是赞" // 小程序消息title
msg.description = "您赞，就是赞" // 小程序消息desc
val bitmap = BitmapFactory.decodeResource(resources, R.mipmap.icon)
if (null == bitmap) {
toast("分享失败")
return
}
//bitmap.height*5/4 ,bitmap.height
val newBitmap = ImageLoadUtils.drawWXMiniBitmap(bitmap,bitmap.width ,bitmap.height)
//此参数不能为空
msg.thumbData = ImageLoadUtils.createBitmapThumbnail(newBitmap,128) // 小程序消息封面图片，小于128k
bitmap.recycle()
val req = SendMessageToWX.Req()
req.transaction = "您赞，就是赞"//buildTransaction("miniProgram")
req.message = msg
req.scene = SendMessageToWX.Req.WXSceneSession // 目前只支持会话
api.sendReq(req)
