Java 访问主活动中的回调（onPictureTaken）变量

我找遍了stackoverflow以找到解决方案，我找到了一些，但我似乎无法让它们工作。我目前从api获得响应，这是我保存在位图中的图像：

我要做的是在条形码结果下方的mainactivity上显示此内容

BarcodeCaptureActivity.java

                    mCameraSource.takePicture(null, new CameraSource.PictureCallback(){
            @Override
            public  void onPictureTaken (byte[] data){
                Context context = getApplicationContext();
                CharSequence text = "Hello toast!";
                int duration = Toast.LENGTH_SHORT;

                Toast toast = Toast.makeText(context, text, duration);
                toast.show();

                String imgData = Base64.encodeToString(data, Base64.NO_WRAP);



                JSONObject jsonObj = new JSONObject();
                try{
                    jsonObj.put("barcode", finalBest.displayValue);
                    jsonObj.put("imgurl", imgData);
                    Context jsonSuc = getApplicationContext();
                    CharSequence jsonText = "Json successful";
                    int jsonDur = Toast.LENGTH_SHORT;

                    Toast jsonToast = Toast.makeText(jsonSuc, jsonText, jsonDur);
                    jsonToast.show();
                }
                catch (JSONException e){
                    Context context2 = getApplicationContext();
                    CharSequence text2 = "Bye toast!";
                    int duration2 = Toast.LENGTH_SHORT;

                    Toast toast2 = Toast.makeText(context2, text2, duration2);
                    toast2.show();
                }
                try {
                    Context connTe = getApplicationContext();
                    CharSequence connectText = "Connection function successful";
                    int connectDur = Toast.LENGTH_SHORT;

                    Toast connectToast = Toast.makeText(connTe, connectText, connectDur);
                    connectToast.show();

                    URL url = new URL("http://MYAPI");
                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                    conn.setRequestMethod("POST");
                    conn.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
                    conn.setRequestProperty("Accept", "application/json");
                    conn.setDoOutput(true);
                    conn.setDoInput(true);

                    Log.i("JSON", jsonObj.toString());
                    DataOutputStream os = new DataOutputStream(conn.getOutputStream());
                    //os.writeBytes(URLEncoder.encode(jsonParam.toString(), "UTF-8"));
                    os.writeBytes(jsonObj.toString());

                    os.flush();
                    os.close();

                    //new
                    String json_response = "";
                    InputStreamReader in = new InputStreamReader(conn.getInputStream());
                    BufferedReader br = new BufferedReader(in);
                    String resptext = "";
                    while ((resptext = br.readLine()) != null) {
                        json_response += resptext;
                    }
                    json_response = json_response.substring(15);
                    json_response = json_response.substring(0, json_response.length()-2);

                    try {
                        URL url2 = new URL(json_response);
                        HttpURLConnection connection = (HttpURLConnection) url2.openConnection();
                        connection.setDoInput(true);
                        connection.connect();
                        InputStream input = connection.getInputStream();
                        myBitmap = BitmapFactory.decodeStream(input); //HEre myBitmap contains an image





                    }catch (Exception e){
                        Log.d(TAG,e.getMessage());
                    }

                    Log.i("STATUS", String.valueOf(conn.getResponseCode()));
                    Log.i("MSG", conn.getResponseMessage());

                    conn.disconnect();
                }
                catch (Exception a) {
                    a.printStackTrace();
                }

                // Do something with the data (this is the JPEG image)

            }
        }
        );
        Intent data = new Intent();
        data.putExtra(BarcodeObject, best);
        data.putExtra("mybitmap", myBitmap); // Here myBitmap is empty
        setResult(CommonStatusCodes.SUCCESS, data);
        finish();
        return true;
    }
    return false;

---

如何在主活动中访问此变量，以便在布局上绘制位图？

服务器响应是什么？现在，它提供了一个图像的URL，因此URL被取出，并从该URL下载保存在位图中的图像。当我在调试器中查看位图时，它会向我显示正确的图像。并且在发送之前，您的位图对象不同于null？Bitmap myBitmap=BitmapFactory.decodeStream（输入）；此时它包含图像。是的，是“myBitmap”！=null？服务器响应是什么？现在它提供了一个图像的URL，所以URL被取出，我从该URL下载一个保存在位图中的图像。当我在调试器中查看位图时，它会向我显示正确的图像。并且在发送之前，您的位图对象不同于null？Bitmap myBitmap=BitmapFactory.decodeStream（输入）；此时它包含图像。是的，是“myBitmap”！=无效的