我知道如果我想启动Activity2,我在Activity1.java中使用此代码

Intent intent ;
Bundle bundle = new Bundle();

bundle.putString(BG_SELECT,hexColor);

intent = new Intent(getApplicationContext(),Activity2.class);

intent.putExtras(bundle);

// this is to start but I want just refresh Activity2 not start it
startActivityForResult(intent,uniqueNo);

并在Activity2.java中

bundle = getIntent().getExtras();

if (bundle != null) {
   bgColor = bundle.getString(SebhaActivity.BG_SELECT);
   System.out.println("in Activity2,selected BG: "+bgColor);

}

如何刷新Activity2以在其中找到数据而不启动它？
提前致谢.