好资源导航 » 文章资讯 » Android学习之本地广播使用方法详解

Android学习之本地广播使用方法详解

2023-09-26 19:52:06 53

本地广播信息只能在应用程序内部传递，同时广播接收器也只能接收应用程序内部的广播消息。

MainActivity代码

packagecom.example.luobo.mybroadcastreceiver;

importandroid.content.BroadcastReceiver;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.content.IntentFilter;
importandroid.support.v4.content.LocalBroadcastManager;
importandroid.support.v7.app.AppCompatActivity;
importandroid.os.Bundle;
importandroid.view.View;
importandroid.widget.Button;
importandroid.widget.Toast;

publicclassMainActivityextendsAppCompatActivityimplementsView.OnClickListener{

privateButtonbutton;
privateIntentFilterintentFilter;
privateLocalBroadcastManagerlocalBroadcastManager;
privateLocalReceiverlocalReciiver;

@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button=(Button)findViewById(R.id.send_button);
button.setOnClickListener(this);
localBroadcastManager=LocalBroadcastManager.getInstance(this);//使用
intentFilter=newIntentFilter();
intentFilter.addAction("com.example.luobo.mybroadcastreceiver.LOCAL_BROADCAST");
localReciiver=newLocalReceiver();
localBroadcastManager.registerReceiver(localReciiver,intentFilter);
}

@Override
protectedvoidonDestroy(){
super.onDestroy();
localBroadcastManager.unregisterReceiver(localReciiver);
}

@Override
publicvoidonClick(Viewview){
Intentintent=newIntent("com.example.luobo.mybroadcastreceiver.LOCAL_BROADCAST");
localBroadcastManager.sendBroadcast(intent);
}
classLocalReceiverextendsBroadcastReceiver{
@Override
publicvoidonReceive(Contextcontext,Intentintent){
Toast.makeText(context,"receivedlocalbroadcast",Toast.LENGTH_SHORT).show();
}
}
}

首先通过LocalBroadcastManager（本地广播管理类）的getInstance(this)方法获取实例，注册广播消息时是调用localBroadcastManager实例的registerReceiver(参数1,参数2)方法注册（参数1是本地广播接受者，参数2是过滤器只选择接收特定的广播消息），调用localBroadcastManager实例的sendBroadcast（Initentinitent）方法发送广播消息。

MyRecevity

packagecom.example.luobo.mybroadcastreceiver;

importandroid.content.BroadcastReceiver;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.widget.Toast;

publicclassMyReceiverextendsBroadcastReceiver{

@Override
publicvoidonReceive(Contextcontext,Intentintent){
Toast.makeText(context,"ReceivedinMyBroadCastReceiver",Toast.LENGTH_SHORT).show();
abortBroadcast();
}
}

activity_main.xml

AndroidMainfest.aml

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。

返回顶部
514930285
czq8825@qq.com

Android学习之本地广播使用方法详解

热门推荐

随机推荐