广播的使用（动态广播）

使用场景：
收银机会有主副屏，当主屏显示会员时，需要副屏也同时显示，此时可以选择使用广播进行通讯
1注册广播(设置过滤标记)

		IntentFilter myIntentFilter = new IntentFilter();
        myIntentFilter.addAction("con.screen.ACTION1");
        myIntentFilter.addAction(ModeSelect.ACTION_SCREEN);
        context.registerReceiver(mBroadcastReceiver, myIntentFilter);

private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            switch (action) {
                case "con.screen.ACTION1":
                    if(intent.getBooleanExtra("isMember",false)){
                        Log.e("wy","run: "+ "接受了是会员广播");
                        text_danjia.setText("会员单价");
                    }
                    else {
                        Log.e("wy","run: "+ "接受了不是会员广播");
                        text_danjia.setText("单价");
                    }
                    break;
                case ModeSelect.ACTION_SCREEN:

                    Bundle bundle = intent.getBundleExtra("haveChooseListSer");
                    LogCatUtil.longLog("ACTION_SCREEN","--------msg---------"+bundle.getSerializable("haveChooseListSer").toString());
                    updateResult((ArrayList<HashMap<String, String>>)bundle.getSerializable("haveChooseListSer"));
                    break;
                case ModeSelect.ACTION_SCREEN_CLOSE://关闭副屏
                    dismiss();
                    break;
                case ModeSelect.ACTION_SCREEN_PICTURE://更新广告展示
            
                    break;
            }
        }
    };

2发送广播

				Intent intent = new Intent();
                intent.setAction("con.screen.ACTION1");
                intent.putExtra("isMember",isMember);
                getActivity().sendBroadcast(intent);
                Log.e("wy","run: "+ "发送时会员广播");

3使用bundle发送一个ArrayList集合

		private ArrayList<HashMap<String, String>> haveChooseListSer = new ArrayList<>();

		Intent intent = new Intent();
        intent.setAction(ModeSelect.ACTION_SCREEN);
        Bundle bundle = new Bundle();
        bundle.putSerializable("haveChooseListSer",haveChooseListSer);
        intent.putExtra("haveChooseListSer", bundle);

本文地址：https://blog.csdn.net/xiyangyang8110/article/details/108141198