CalledFromWrongThreadException: Only the original thread that created a view

    private void btnfinishClick(View v)
    {        
        new Thread(new MyRunnable()).start();
    }
    
    class MyRunnable implements Runnable{

        @Override
        public void run()
        {
            try
            {
                setContentView(R.layout.activity_call_finish);
                TextView tv = (TextView)findViewById(R.id.name);
                tv.setText(number);
                
                TextView prompt = (TextView)findViewById(R.id.prompt);
                prompt.setText("通话结束");
                
                TextView ct = (TextView)findViewById(R.id.call_chronometer);
                ct.setText(call_chronometer.getText());
                
                Thread.sleep(1000);
                
                myHandler.sendEmptyMessage(1);
            }
            catch (InterruptedException e)
            {
                e.printStackTrace();
            }
        }
    }

在通话结束时跳转到一个过渡界面，而上面的写法是将更新UI的代码写入到UI子线程中，所以会报错：
CalledFromWrongThreadException: Only the original thread that created a view

正确的做法时
将：

                setContentView(R.layout.activity_call_finish);
                TextView tv = (TextView)findViewById(R.id.name);
                tv.setText(number);
                
                TextView prompt = (TextView)findViewById(R.id.prompt);
                prompt.setText("通话结束");
                
                TextView ct = (TextView)findViewById(R.id.call_chronometer);
                ct.setText(call_chronometer.getText());

代码从子线程中提到btnfinishClick()里面，这样就不会报错了