ActivityGroup做的类似TAB,跳转新页后里面没事件响应

代码很简单 就是跳转的代码 public void onClick(View v) {        if (v.getId() == R.id.btn_groom) {
            linearLayout.removeAllViews();
            m_ActivityManager = getLocalActivityManager();
            linearLayout.getChildAt(0);
            btn_groom.setBackgroundResource(R.drawable.weione);
            btn_groom.setTextColor(this.getResources().getColor(R.color.black));        } else {
            btn_groom.setBackgroundResource(R.drawable.wei);
            btn_groom.setTextColor(this.getResources().getColor(R.color.white));
        }        if (v.getId() == R.id.btn_hot) {            linearLayout.removeAllViews();
            m_ActivityManager = getLocalActivityManager();
            linearLayout.addView(m_ActivityManager.
                    startActivity(
                            "1",    //这里的的1不多说 大家都懂的 
                            new Intent(MyTab.this, HotActivity.class)
                                    ).getDecorView());
            btn_hot.setBackgroundResource(R.drawable.weione);
            btn_hot.setTextColor(this.getResources().getColor(R.color.black));        } else {
            btn_hot.setBackgroundResource(R.drawable.wei);
            btn_hot.setTextColor(this.getResources().getColor(R.color.white));
        }        if (v.getId() == R.id.btn_date) {
            linearLayout.removeAllViews();
            m_ActivityManager = getLocalActivityManager();
            linearLayout.addView(m_ActivityManager.
                    startActivity("2",//2
                            new Intent(MyTab.this, MyDataActivity.class)
                                    ).getDecorView());
            btn_date.setBackgroundResource(R.drawable.weione);
            btn_date.setTextColor(this.getResources().getColor(R.color.black));        } else {
            btn_date.setBackgroundResource(R.drawable.wei);
            btn_date.setTextColor(this.getResources().getColor(R.color.white));
            
        }        if (v.getId() == R.id.btn_sorting) {
            linearLayout.removeAllViews();
            m_ActivityManager = getLocalActivityManager();
            linearLayout.addView(m_ActivityManager.
                    startActivity(
                            "3",//3
                            new Intent(MyTab.this, ListView_tab.class)
                                    ).getDecorView());
            btn_sorting.setBackgroundResource(R.drawable.weione);
            btn_sorting.setTextColor(this.getResources().getColor(R.color.black));
                    } else {
            btn_sorting.setBackgroundResource(R.drawable.wei);
            btn_sorting.setTextColor(this.getResources().getColor(R.color.white));                   }
我现在的问题是 比如  if (v.getId() == R.id.btn_hot) 的跳转 现在是跳转到新的一页HotActivity.class   可是这个Hotactivity里面用一个griview显示数据 但是点击ITEM的时候触发不了事件，只能把startActivity( "1",new Intent(MyTab.this, HotActivity.class) ).getDecorView());这个1去掉 才能触发事件 这个怎么回事？