由于可变大小，应用程序无响应

Question

所以我正在编写一个数据科学应用程序，它从几个传感器收集数据并将它们发送到下拉框。

只要sensorReading中的数据超过500 kB并且我的停止按钮无法正常工作，我的应用就会挂起。

这是我的代码：

@Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn_pos_poll_side: {

                if (LightSensor != null || mProximity != null || mAccelerometer != null || mGyroscope != null) {

                    mySensorManager.registerListener(
                            MultiSensorListener,
                            LightSensor,
                            SensorManager.SENSOR_DELAY_NORMAL);

                    mySensorManager.registerListener(
                            MultiSensorListener,
                            mProximity,
                            SensorManager.SENSOR_DELAY_NORMAL);

                    mySensorManager.registerListener(
                            MultiSensorListener,
                            mAccelerometer,
                            SensorManager.SENSOR_DELAY_NORMAL);

                    mySensorManager.registerListener(
                            MultiSensorListener,
                            mGyroscope,
                            SensorManager.SENSOR_DELAY_NORMAL);

                    //print output text
                    side_output.setText(Html.fromHtml("<h3> ----- Data Collection Session Starts Here -----</h3>"));

                } else {
                    side_output.setText("No Sensor Found!");
                }
                break;
            }

            case R.id.btn_stop_poll_side: {
                mySensorManager.unregisterListener(MultiSensorListener,
                        LightSensor);
                mySensorManager.unregisterListener(MultiSensorListener,
                        mProximity);
                mySensorManager.unregisterListener(MultiSensorListener,
                        mAccelerometer);
                mySensorManager.unregisterListener(MultiSensorListener,
                        mGyroscope);
                side_output.append("\n" + sensorReading);
                /*
                    Reading data and writing to Dropbox!
                 */
                new DropboxTask(side_output, "Back Pocket Data Reading", sensorReading).execute();
                break;
            }            
        }
    }

    private final SensorEventListener MultiSensorListener
            = new SensorEventListener() {

        @Override
        public void onSensorChanged(SensorEvent event) {
            if (event.sensor.getType() == Sensor.TYPE_LIGHT) {

                numLightSensor = event.values[0];
                sensorReading += "\"BackPocket\" " + String.valueOf(numLightSensor) + " " +
                        String.valueOf(numProximitySensor) + " " +
                        String.valueOf(numAccelerometer_X) + " " +
                        String.valueOf(numAccelerometer_Y) + " " +
                        String.valueOf(numAccelerometer_Z) + " " +
                        String.valueOf(numGyroscope_X) + " " +
                        String.valueOf(numGyroscope_Y) + " " +
                        String.valueOf(numGyroscope_Z) + "\n";
            }
            if (event.sensor.getType() == Sensor.TYPE_PROXIMITY) {

                //similar as above
            }
            if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {

               //similar as above
            }

            if (event.sensor.getType() == Sensor.TYPE_GYROSCOPE) {

                //similar as above
            }
        }
    };

如何才能使其最佳运作？ 谢谢！