title: The Button of ActivityGroup don't work in sun Activity
body: <p>when I click save button, onClick method can't run.
  this is a ActivityGroup.I holp the save button can run or listen in sun activity</p>
  
  <pre><code>public class DisasterActivity extends ActivityGroup {
  RadioGroup radioGroup;
  RadioButton tab_mydisaster;
  RadioButton tab_upload;
  RadioButton tab_view;
  FrameLayout container;
  Button save;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      // TODO Auto-generated method stub
      super.onCreate(savedInstanceState);
      setContentView(R.layout.disaster);
      initview();
      setClick();
      container.addView(getLocalActivityManager().startActivity("mydisaster",
              new Intent(this, MyDisaster.class)).getDecorView());
  }
  
  void initview() {
      radioGroup = (RadioGroup) findViewById(R.id.tab);
      tab_mydisaster = (RadioButton) findViewById(R.id.tab_mydisaster);
      tab_upload = (RadioButton) findViewById(R.id.tab_upload);
      tab_view = (RadioButton) findViewById(R.id.tab_view);
      container = (FrameLayout) findViewById(R.id.container);
      save = (Button) findViewById(R.id.save);
  }
  
  void setClick() {
      radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
  
          @Override
          public void onCheckedChanged(RadioGroup group, int checkedId) {
              // TODO Auto-generated method stub
              LocalActivityManager manager = getLocalActivityManager();
              Window window = null;
              Intent intent = null;
              container.removeAllViews();
              switch (checkedId) {
              case R.id.tab_mydisaster:
                  intent = new Intent(DisasterActivity.this, MyDisaster.class);
                  window = manager.startActivity("mydisaster", intent);
                  break;
              case R.id.tab_upload:
                  intent = new Intent(DisasterActivity.this, UpLoadImg.class);
                  window = manager.startActivity("uploadimg", intent);
                  break;
              case R.id.tab_view:
                  intent = new Intent(DisasterActivity.this,
                          ViewBriefActivity.class);
                  window = manager.startActivity("viewbreaf", intent);
                  break;
              }
              container.addView(window.getDecorView());
          }
      });
  }
  </code></pre>
  
  <p>}</p>
  
  <p>The Button of ActivityGroup don't work in sun Activity.
  onclick meath of save.setOnClickListener can't run..</p>
  
  <pre><code> public class MyDisaster extends Activity{
  ActivityGroup parent;
  Button save;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      // TODO Auto-generated method stub
      super.onCreate(savedInstanceState);
      setContentView(R.layout.data_manage);
      parent=(ActivityGroup)getParent();
      save=(Button)parent.findViewById(R.id.save);
      save.setOnClickListener(new OnClickListener() {
  
          @Override
          public void onClick(View v) {
              // TODO Auto-generated method stub
              Toast.makeText(parent, "Test", Toast.LENGTH_SHORT).show();
          }
      });
  }
  </code></pre>
  
  <p>}</p>