Android开发 本地广播

前言

本地广播只能在应用程序内部进行传递，并且只能通过动态注册.这种本地广播的好处是不会将一些隐蔽信息被全局广播出去.

使用说明

创建广播接受类,继承BroadcastReceiver 

    public class MyReceiver extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {
            if (TextUtils.equals(intent.getAction(), DEMO_ACTION)){
                Toast.makeText(context, "触发本地广播", Toast.LENGTH_SHORT).show();

            }
        }
    }

注册广播,请注意,注册本地广播需要使用LocalBroadcastManager进行注册,这点与静态广播不通.

    private CloseDialogReceiver mCloseDialogReceiver;
    private void registerReceiver(){
        mCloseDialogReceiver = new CloseDialogReceiver();
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction(DEMO_ACTION);
        LocalBroadcastManager.getInstance(this).registerReceiver(mCloseDialogReceiver, intentFilter);
    }

发送广播,发送也需要使用LocalBroadcastManager发送 

    public void send(){
        Intent dismissDialog = new Intent(DEMO_ACTION);
        LocalBroadcastManager localBroadcastManager = LocalBroadcastManager.getInstance(this);
        localBroadcastManager.sendBroadcast(dismissDialog);
    }

注销广播

LocalBroadcastManager.getInstance(this).unregisterReceiver(mCloseDialogReceiver);