分享小程序-即速应用

在grdle里

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

在WXEntryActivity类

@Overridepublic void onResp(BaseResp baseResp) {    int errCode = baseResp.errCode;    if (baseResp.getType() == ConstantsAPI.COMMAND_LAUNCH_WX_MINIPROGRAM) {        WXLaunchMiniProgram.Resp launchMiniProResp = (WXLaunchMiniProgram.Resp) baseResp;        String extraData =launchMiniProResp.extMsg; //对应小程序组件 <button open-type="launchApp"> 中的 app-parameter 属性    }

接下来再需要的地方写如下代码：

private void shareMiniProgram() {    String appId = ConstantValues.APP_ID; // 填应用AppId    IWXAPI api = WXAPIFactory.createWXAPI(mContext, appId);    WXMiniProgramObject miniProgramObj = new WXMiniProgramObject();    miniProgramObj.webpageUrl = "http://www.qq.com"; // 兼容低版本的网页链接    miniProgramObj.miniprogramType = WXMiniProgramObject.MINIPTOGRAM_TYPE_RELEASE;// 正式版:0，测试版:1，体验版:2    miniProgramObj.userName = "gh_890e142ba85";     // 小程序原始id    miniProgramObj.path = “pages/xxx/xxx”；            //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"    WXMediaMessage msg = new WXMediaMessage(miniProgramObj);    msg.title = “title”;           // 小程序消息title    msg.description = "描述";  // 小程序消息desc        Bitmap bitmap = ImageUtil.getBitMBitmap(mGoodsDetial.getCover());    byte[] bytes = ImageUtil.compressByQuality(bitmap, 120, true);    msg.thumbData = bytes;        SendMessageToWX.Req req = new SendMessageToWX.Req();    req.transaction = buildTransaction("miniProgram");    req.message = msg;    req.scene = SendMessageToWX.Req.WXSceneSession;  // 目前只支持会话    api.sendReq(req);}private static String buildTransaction(final String type) {    return (type == null) ? String.valueOf(System.currentTimeMillis()) : type + System.currentTimeMillis();}

详细说一下这个加载小程序封面图的问题，也就是如下代码：
Bitmap bitmap = ImageUtil.getBitMBitmap(mGoodsDetial.getCover());
byte[] bytes = ImageUtil.compressByQuality(bitmap, 120, true);
msg.thumbData = bytes;

第一种情况加载本地图片的时候：可将以上代码换成下边即可
Bitmap bitmap=BitmapFactory.decodeResource(this.getResources(),R.drawable.fightk);
Bitmap sendBitmap = Bitmap.createScaledBitmap(bitmap,200,200,true);
bitmap.recycle();
mediaMessage.thumbData = Util.bmpToByteArray(sendBitmap,true);

第二种加载图片url，也就是以上所写的那样，因为图片超过128k无法分享，所以要将其压缩
另外涉及到的两个方法：

/** * 图片url转bitmap */public static Bitmap getBitMBitmap(String urlpath) {    if (android.os.Build.VERSION.SDK_INT > 9) {        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();        StrictMode.setThreadPolicy(policy);    }    Bitmap map = null;    try {        URL url = new URL(urlpath);        URLConnection conn = url.openConnection();        conn.connect();        InputStream in;        in = conn.getInputStream();        map = BitmapFactory.decodeStream(in);        // TODO Auto-generated catch block    } catch (IOException e) {        e.printStackTrace();    }    return map;}/** * 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;}