用Broadcast廣播在activity之間、fragment之間、activity和fragment之間相互傳數據

例如：A界面要收到B界面的更變信息

一、A界面注冊廣播

private static final String INTENT_BROADCAST = "android.intent.action.MEDICAL_BROADCAST";// 廣播跳轉意圖

 

LocalBroadcastManager broadcastManager = LocalBroadcastManager.getInstance(getActivity());
            IntentFilter intentFilter = new IntentFilter();
            intentFilter.addAction(INTENT_BROADCAST);
            BroadcastReceiver bordcastReceiver = new BroadcastReceiver() {

                 @Override
                public void onReceive(Context context, Intent intent) {
                      //信息處理

                      Toast.makeText(context, "信息更新", Toast.LENGTH_SHORT).show();             

                }
           };
  broadcastManager.registerReceiver(bordcastReceiver, intentFilter);

 

 

二、B界面發送廣播通知A界面改變信息

Intent broadcast = new Intent(INTENT_BROADCASTS);

LocalBroadcastManager.getInstance(this).sendBroadcast(broadcast);