Intent intent = new Intent();
intent.setClass(页面1.this, 页面2.class);
Bundle bundle = new Bundle();
intent.putExtras(bundle);//将Bundle添加到Intent,也可以在Bundle中添加相应数据传递给下个页面,例如：bundle.putString("abc", "bbb");
startActivityForResult(intent, 0);// 跳转并要求返回值，0代表请求值(可以随便写)

Intent intent = this.getIntent();
Bundle bundle = intent.getExtras();
bundle.putString("aaa", "back");//添加要返回给页面1的数据
intent.putExtras(bundle);
this.setResult(Activity.RESULT_OK, intent);//返回页面1
this.finish();

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  super.onActivityResult(requestCode, resultCode, data);
  if (requestCode == 0 && resultCode == Activity.RESULT_OK) {
   Bundle bundle = data.getExtras();
   gameView.backString = bundle.getString("aaa");
    Toast.makeText(this, backString, Toast.LENGTH_SHORT).show();
  }
}