57、android 应用内全局通知的实现方法

1、后台运行一个服务 间隔5s从服务器获取一次数据，根据业务需要，当需要提醒给用户时，从右侧自动划出

类似效果如下：在任何界面都会有通知弹窗

2、实现过程

 

①android的根布局叫dector（获取方式为：window.getDecotrView()）,

②在activity中setContView设置的activity布局，可以通过dector.getChildAt(0)

③自定义一个FramLayout,FramLayout首先添加above；自定义通知内容，添加到FramLayout；然后把我们自定义的FrameLayout添加到dector

for example：

        ViewGroup decor = (ViewGroup) mWindow.getDecorView();//获取根布局
        ViewGroup above = (ViewGroup) decor.getChildAt(0);//获取activity的布局
        decor.removeView(above);
        above.setBackgroundDrawable(decor.getBackground());
　　　　　/**自定义通知开始**/
        LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
        rlNotifactions.setLayoutParams(lp);

        View grid = inflater.inflate(R.layout.listview_notification,null);
        ListView listview = (ListView)grid.findViewById(R.id.listview_notification_list);
        listview.setAdapter(adapter);
        RelativeLayout.LayoutParams lpTv = new RelativeLayout.LayoutParams(790, ViewGroup.LayoutParams.MATCH_PARENT);
        lpTv.addRule(RelativeLayout.ALIGN_PARENT_TOP|RelativeLayout.ALIGN_PARENT_RIGHT);
        lpTv.setMargins(0, 100, 0, 0);
　　　　　　/**自定义通知结束**/
        rlNotifactions.addView(grid,lpTv);

        mAboveView.addView(above);

        addView(mAboveView);
        addView(rlNotifactions);
        decor.addView(this);//this指的是上文提到的自定义frameLayout
    }

参考：

https://github.com/adamrocker/simple-side-drawer/blob/master/doc/simple_side_drawer2.pdf 

https://github.com/adamrocker/simple-side-drawer