android 生命周期之onStart,onResume,onHided

点击侧栏某一项时，会调用

 @Override
    public void onHiddenChanged(boolean hidden) {
        super.onHiddenChanged(hidden);
        if (!hidden) {
            list.clear();
            devicemessagefragment = new DeviceMessageFragment();
//        roomFragment = new RoomFragment();
            systemmessagefragment = new SystemMessageFragment();
            list.add(devicemessagefragment);
            list.add(systemmessagefragment);
//            list.add(roomFragment);
            adapter = new FragmentViewPagerAdapter(fm, viewpager_id, list);
            startState();
            addtxt_text_id.setText("编辑");
        }
    }

当app从后台进入到前台时会调用:

@Override
public void onStart() {//onStart方法是屏幕唤醒时弹执行该方法。
    super.onStart();
    addtxt_text_id.setText("编辑");
    sendBroad("取消");
}