从线程对象访问MainActivity中的方法

在我的Android应用程序中，我有一个MainActivity类，该类启动了一个线程。该线程执行填充并将其显示在屏幕上。（这部分正在工作）

我想从线程访问MainActivity-Class中的方法。但是它不起作用...“无法解决方法”

这是我的代码...

线程对象：

public class SensorProcessor implements Runnable {

    protected Context mContext;
    protected Activity mActivity;

    private volatile boolean running = true;
    //Tag for Logging
    private final String LOG_TAG = SensorProcessor.class.getSimpleName();

    public SensorProcessor(Context mContext, Activity mActivity){
        this.mContext = mContext;
        this.mActivity = mActivity;
    }


    public void run() {

            while (running){

                try {                    

                    final String raw = getSensorValue();
                    mActivity.runOnUiThread(new Runnable() {
                        public void run() {
                            //WORKS
                            final TextView textfield_sensor_value;
                            textfield_sensor_value = (TextView) mActivity.findViewById(R.id.text_sensor);
                            textfield_sensor_value.setText("Sensor Value: " + raw);
                            Log.v(LOG_TAG, raw);


                            //DOES NOT WORK, WHY?
                            mActivity.myMethod(); //Cannot resolve method
                        }
                    });



                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    //When an interrupt is called, we set running to false, so the thread can exit nicely
                    running = false;
                }
            }

            Log.v(LOG_TAG, "Sensor Thread finished");

    }
}

MainActivity类，正在调用线程：

public class MainActivity extends Activity implements OnClickListener, OnInitListener {


    public void myMethod(){
        //Do stuff...
    }

    //Start the Thread, when the button is clicked
    public void onClick(View v) {
        if (v.getId() == R.id.button_start) {
            runnable = new SensorProcessor(this.getApplicationContext(),this);
            thread = new Thread(runnable);
            thread.start();
        }
    }
}

为什么使用mActivity.runOnUiThread（new Runnable（）-方法）不起作用，如何正确完成？

最好的祝福