处理程序返回null异常并在消息中发送null

Question

这是我的处理程序代码，我在oncreate（）方法中设置了我的进度条

     progressBar = (ProgressBar) findViewById(R.id.progressBar);
     thread = new Thread(new MyThread());
     thread.start();
     handler = new Handler() {

        @Override
        public void handleMessage(Message msg) {
            progressBar.setProgress(msg.arg1);

                          }
       };

      if(progressBar.getProgress()==99)
    {
        Intent i = new Intent(SplashScreen.this,MainActivity.class);
        startActivity(i);
        finish();

    }

这是MyThread类，通过它我向处理程序发送消息

class MyThread implements Runnable{


    @Override
    public void run() {

        for (int i=0;i<100;i++){

            Message message = Message.obtain();

            message.arg1 = i;
            handler.sendMessage(message);


            try {

                Thread.sleep(100);

            } catch (InterruptedException e) {
                e.printStackTrace();
            }


        }
    }
}//mythread

我想在进度条完成进度时开始我的主要活动。 但是mesage.arg1返回null 告诉我我在哪里犯错误

This is the screen shot which andriod studio is generating to me