活动之间的数据绑定两种方式

Question

我有2个活动，并且需要main Activity将一些数据发送到second Activity，然后第二个活动分析了此数据并将响应发送回，所以我有以下2个代码：

Main Activity：

    import static tk.zillion.mobile.SecondActivity.EXTRA_STUFF;
  public class MainActivity extends Activity {
    private static int PICK_CONTACT_REQUEST = 0;
   private static final int SECOND_ACTIVITY_RESULT_CODE = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
   // Start the SecondActivity
    Intent intent = new Intent(MainActivity.this, SecondActivity.class);
    intent.putExtra(Intent.EXTRA_TEXT, "my text");
    startActivityForResult(intent, SECOND_ACTIVITY_RESULT_CODE);
    finish();
  }
// This method is called when the second activity finishes
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    Toast.makeText(this, "I'm the Main activity", Toast.LENGTH_SHORT).show();
    // check that it is the SecondActivity with an OK result
    if (requestCode == SECOND_ACTIVITY_RESULT_CODE) {
        if (resultCode == RESULT_OK) {
            // get String data from Intent
            String returnString = data.getStringExtra(EXTRA_STUFF);
            // set text view with string
            Toast.makeText(this, "I'm the Main activity", Toast.LENGTH_SHORT).show();
        }
    }
}

和Second Activity如下：

public class SecondActivity extends Activity {
static final String EXTRA_STUFF = "tk.zillion.mobile.EXTRA_STUFF";
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Intent intent = new Intent();
    String s = getIntent().getStringExtra(Intent.EXTRA_TEXT);
    Toast.makeText(this, "I'm the second activity " + s , Toast.LENGTH_SHORT).show();
    Bundle basket =new Bundle();
    basket.putString(EXTRA_STUFF, s);
    intent.putExtras(basket);
    setResult(RESULT_OK, intent);
    finish();
  }
}

第二个活动是正确触发的，并从主数据中接收数据，但是一旦发送回数据，onActivityResult就不会发射！

！

我该如何解决？谢谢

Answer 1

删除startActivityForresult（）之后的饰面（）调用。您可以防止迎面而来的活动退回结果，因为您从后背任务中删除了饰面（）。

Answer 2

startActivityForresult之后不要调用finish（），否则开始第二次的主动行为的实例将被销毁