如题 
mButton1.setOnClickListener(new OnClickListener() {    
         public void onClick(View v) {    
         mBodyView.removeAllViews();
         mBodyView.addView(getLocalActivityManager().startActivity(
                                "Module1",
                                new Intent(maingroup.this, XxtyFColumn.class)
                                        .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))
                                .getDecorView());         }   
         }); 转向到另一个activity 以后 怎么返回上一个activity 和点击返回键返回上一个activity