Activity获取返回值

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
    }

    public void click(View c){
        //跳转至选择联系人Activity
        Intent intent = new Intent(this, ContactActivity.class);
//        startActivity(intent);
        //用这个api启动的Activity，在销毁时，系统会回调onActivityResult
        startActivityForResult(intent, 10);
    }
    
    
    //如果有Activity在销毁时返回了数据，那么就会调用此方法来接收数据
    //requestCode:用来区分数据来自于哪一个Activity
    //resultCode:用来区分返回的数据是什么类型的
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        
        String name = data.getStringExtra("name");
        if(requestCode == 10){
            EditText et = (EditText)findViewById(R.id.et);
            et.setText(name);
        }
        
    }
    

}

public class ContactActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_contact);
        
        ListView lv = (ListView) findViewById(R.id.lv);
        
        final String[] objects = new String[]{
                "小志",
                "逼哥",
                "世界级XXX",
                "国服第一"
        };
        
        lv.setAdapter(new ArrayAdapter<String>(this, R.layout.item_listview, R.id.tv, objects));
    
        //给listview设置条目的点击侦听
        lv.setOnItemClickListener(new OnItemClickListener() {

            //当某个条目被点击时，此方法调用
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                
                //Activity返回时传递数据，也是通过意图对象
                Intent data = new Intent();
                //把要传递的数据封装至意图对象中
                data.putExtra("name", objects[position]);
                
                //当前Activity销毁时，data这个意图就会传递给启动当前Activity的那个Activity
                setResult(1, data);
                
                //销毁当前Activity
                finish();
            }
        });
    }
    
    @Override
    public void onBackPressed() {
        // TODO Auto-generated method stub
        super.onBackPressed();
    }
}