第一：A界面：
public class MainActivity extends Activity { private final static int REQUEST_CODE=1; /** * 点击购物车按钮进入订单详细界面 */ public class StockOnClickListener implements OnClickListener{ @Override public void onClick(View arg0) { Intent intent=new Intent(); intent.setClass(MainActivity.this, OrderingActivity.class); String str=""; try { str = MySerialize.serialize(lsorder); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } intent.putExtra("list", str); if(tv_zuohao.getText().toString().equals("0号桌")||tv_zuohao.getText().toString().equals("号桌")){ final View view = LayoutInflater.from(getApplicationContext()).inflate(R.layout.zuohao_dialog1, null); TextView tv_message=(TextView) view.findViewById(R.id.dialog_message); tv_message.setVisibility(View.VISIBLE); tv_message.setText("\t\t\t\t\t\t"+"请先输入您的桌号，方便您下单，或者点击屏幕右上角的“获取桌号”!"); Button btok=(Button) view.findViewById(R.id.dialog_btok); Button btresult=(Button) view.findViewById(R.id.dialog_btresult); final EditText et_zuohao1=(EditText) view.findViewById(R.id.et_setzuohao1); final Dialog dialog = new Dialog(MainActivity.this,R.style.dialog);//,R.style.dialog Window dialogWindow = dialog.getWindow(); WindowManager.LayoutParams params = dialog.getWindow().getAttributes(); // 获取对话框当前的参数值 dialogWindow.setAttributes(params); dialog.setContentView(view); btok.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { zuohao=et_zuohao1.getText().toString().trim(); tv_zuohao.setText(zuohao+"号桌"); //使用SharedPreferences将桌号保存 SharedPreferences spzuohao=getSharedPreferences("zuohao", MODE_PRIVATE); Editor editor=spzuohao.edit(); editor.putString("zuohao",zuohao ); editor.commit(); dialog.dismiss(); } }); btresult.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { dialog.dismiss(); } }); dialog.show(); } else{ String zuohaostr=tv_zuohao.getText().toString(); intent.putExtra("zuohao", zuohaostr); startActivityForResult(intent, REQUEST_CODE); } } } /** * 从购物车返回的数据处理 * */ @SuppressWarnings("unchecked") @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode==REQUEST_CODE) { if (resultCode==OrderingActivity.RESULT_CODE) { Bundle bundle=data.getExtras(); String str=bundle.getString("list"); //获取订单集合// String str = intent.getExtras().getString("list"); try { lsorder = (List ) MySerialize.deSerialization(str); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } tvstockNum.setText("当前已选择"+String.valueOf(lsorder.size())+"道菜"+"\n"+"选好后记得点我下单哦！"); } if (!seclecMode) { // 图片模式刷新 tpAdapter.notifyDataSetChanged(); } } }} 上面这段代码是从A界面跳转到B界面，需注意的是我们在跳转时用到
startActivityForResult(intent, REQUEST_CODE);
里面传两个参数（intent 和 请求码），并在A界面重写onActivityRusult()方法，接收从B界面改变集合后的数据，建议先看B界面的代码
B界面：
public class OrderingActivity extends Activity { public final static int RESULT_CODE=1; // 返回监听 public class BackClickListener implements OnClickListener { @Override public void onClick(View arg0) { // TODO Auto-generated method stub Intent in=new Intent(); String str=""; try { str = MySerialize.serialize(lsob); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } in.putExtra("list", str); setResult(RESULT_CODE, in); finish(); } }} B界面我们将改变后的集合传回A界面，使用了setResult()这个方法，然后在使用finish()方法传回