onBackPressed 设置返回值，onActivityResult resultcode一直是0

activity1：

  Intent intent2 =new Intent(this,checkactivity.class);

  startActivityForResult(intent2,1000);

activity2:

   @Override
    public void onBackPressed() {
        super.onBackPressed();

        Intent intent = new Intent();

        setResult(result,intent);
        finish();
    }

activity1：

@Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {


        super.onActivityResult(requestCode, resultCode, data);
        Log.i("LOG_RES:","Checking.." + requestCode +"," + resultCode);
        if (requestCode==1000){



                int curProgress = progressBar.getProgress();

//                if (curProgress==progressBar.getMax()){
//
//                    progressBar.setProgress(0);
//
//                }else  {

                    progressBar.setProgress(curProgress + resultCode*10);

//                }

resultcode一直是0



点击返回键，没有正确得到回调！这是为何？因为OnBackPressed() 会默认设置setResult(RESULT_CANCELED); 

解决方案：

  @Override
    public void onBackPressed() {


        Intent intent = new Intent();
//        intent.putExtra("returnFirst", "我回来了");
        setResult(result,intent);
        finish();
        super.onBackPressed();


    }