代码注册广播

//注册广播代码
 contactReceiver = new ContactReceiver();
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction("com.newingscom.vieocall.call");
        //当网络发生变化的时候，系统广播会发出值为android.net.conn.CONNECTIVITY_CHANGE这样的一条广播
        registerReceiver(contactReceiver, intentFilter);



public class ContactReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            rl_video_view.setVisibility(View.VISIBLE);
        }
    }


//发送广播代码
 Intent intent = new Intent();
        intent.setAction("com.newingscom.vieocall.call");
        mContext.sendBroadcast(intent);