public class MainActivity extends Activity { 
  @Overrideprotected void onCreate(Bundle savedInstanceState) { 
  Button button =(Button)this.findViewById(R.id.button); 
  button.setOnClickListener(new View.OnClickListener(){ 
//点击该按钮会打开一个新的Activity 
  publicvoid onClick(View v) { 
  //第二个参数为请求码，可以根据业务需求自己编号 
  startActivityForResult(new Intent(MainActivity.this, NewActivity.class), 1); 
 }}); 
  } 
 //第一个参数为请求码，即调用startActivityForResult()传递过去的值 
 //第二个参数为结果码，结果码用于标识返回数据来自哪个新Activity 
 @Override protected voidonActivityResult(int requestCode, int resultCode, Intent data) { 
 String result =data.getExtras().getString(“result”));//得到新Activity关闭后返回的数据 
 } 
}  

@Override 
public void onCreate(Bundle savedInstanceState) { 
  .... 
  button1.setOnClickListener(newView.OnClickListener(){ 
  public void onClick(View v) { 
   startActivityForResult (newIntent(MainActivity.this, NewActivity.class), 1); 
  }}); 
  button2.setOnClickListener(newView.OnClickListener(){ 
  public void onClick(View v) { 
   startActivityForResult (newIntent(MainActivity.this, NewActivity.class), 2); 
  }}); 
  @Override protected voidonActivityResult(int requestCode, int resultCode, Intent data) { 
    switch(requestCode){ 
     case 1: 
      //来自按钮1的请求，作相应业务处理 
     case 2: 
     //来自按钮2的请求，作相应业务处理 
    } 
   } 

public class ResultActivity extends Activity { 
  ..... 
  ResultActivity.this.setResult(1, intent); 
  ResultActivity.this.finish(); 
} 
public class NewActivity extends Activity { 
  ...... 
  NewActivity.this.setResult(2,intent); 
  NewActivity.this.finish(); 
} 
public class MainActivity extends Activity { // 在该Activity会打开ResultActivity和NewActivity 
  @Override protected voidonActivityResult(int requestCode, int resultCode, Intent data) { 
    switch(resultCode){ 
     case 1: 
      // ResultActivity的返回数据 
     case 2: 
     // NewActivity的返回数据 
    } 
   } 
}