Cordova android插件无法更新JSON对象

Question

我开发了一个用于光学字符识别的cordova插件。我将图像发送到android，图像处理部分由插件完成，处理后插件将JSON对象返回给Cordova。该插件第一次正常工作只有正确接收数据但当我第二次处理图像时，插件返回的数据是正确的，但在cordova端，Json对象没有更新，它显示以前的数据。 / p>

 try {
        if (ACTION.equals(action)) 
        { 
            Log.d("action name", action);
            Log.d("json object", args.getString(0));
            //JSONObject arg_object = args.getJSONObject(0);


            this.callbackContext = callbackContext;


            if(ACTION_CAMERA.equals(args.getString(0))){

                Log.d("action name", "camera");

                cordova.getThreadPool().execute(new Runnable() {
                    public void run() {
                        camera();
                        callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK, json)); // Thread-safe.
                    }
                });

            }


            /*
             * sending the JSON object containing OCR results and BASE64 encoded string to javaScript 
             */
                //callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK, json));
                result = true;

                Log.d("after results", "after results");

        }
        else{
            callbackContext.error("Invalid action");
            result = false;
        }

        return result;

    } 
    catch(Exception e) 
    {
        System.err.println("Exception: " + e.getMessage());
        callbackContext.error(e.getMessage());
        return false;
    } 
}

我的cordova代码是

 function onPhotoURISuccess(obj) {

     alert(obj['all']);

    // clear image div contents
    $("#base64Image").empty();

    $("#base64Image").attr('src', '');

    var image = new Image();
    image.src = 'data:image/png;base64,' + obj['imageBase64'];

    $("#base64Image").append(image);    
    $('#base64Image').width();


}


// A button will call this function

function capturePhoto() {


    var success = function(message) {

        onPhotoURISuccess(message);
    }

    var failure = function() {
        alert("Error calling OCR 1 Plugin");
    }

    OCRPlugin.greet("camera", success, failure);

}