Android基础复习之广播（Broadcast）

概述Android广播知识复习作者：朱红喜1.广播分类按通信方式分类标准广播（normalbroadcast）有序广播（orderedbroadcast）按广播区域分类全局广播本地广播（LocalBrodcast）标准广播：完全异步的广播，广播发出后每一个广播接收器都会同一时刻接收到这条广播信息，无法被拦 AndroID广播知识复习作者：朱红喜1.广播分类按通信方式分类标准广播 （normal broadcast）有序广播 （ordered broadcast）按广播区域分类全局广播本地广播（Localbrodcast）标准广播：完全异步的广播，广播发出后每一个广播接收器都会同一时刻接收到这条广播信息，无法被拦截。有序广播：一种同步的广播，同一时刻只能由一个接收器能够接收到这条广播，接收器有顺序优先级，广播可以截断全局广播：所有的应用都可以收到的广播本地广播：只能够被本应用内的接收器接收到2.动态注册广播接收器

private IntentFilter intentFilter;private Customreceiver  mReceiver;@OverrIDeprotected voID onCreate(Bundle saveInstanceState){	super.onCreate(saveInstanceState);	setContentVIEw(R.layout.activity_main);	intentFilter = new IntentFilter();	intentFilter.addAction("androID.net.conn.CONNECTIVITY_CHANGE");	mReceiver= new Customreceiver();	registerReceiver(mReceiver,intentFilter);} @OverrIDeprotected voID onDestroy(){	super.onDestroy();	unregisterReceiver(mReceiver);}class Customreceiver extends broadcastReceiver{	@OverrIDe	public voID onReceive(Context context,Intent intent){		//你的逻辑代码	}}

3.静态注册广播(manifest文件中)

<receiverandroID：name=".Customreceiver"androID:enabled="true" 启用这个广播androID:exported="true">  是否允许接收本程序外的广播<intent-filter>	<action androID:name="你需要的action"/></intent-filter></receiver>

4.发送广播发送标准广播

Intent intent = new Intent("你的广播的action")sendbroadcast(intent);

发送有序广播

Intent intent = new Intent("你的广播的action")sendOrderedbroadcast(intent);

5.使用本地广播

private IntentFilter intentFilter;private Customreceiver  mReceiver;private LocalbroadcastManager localbroadcastManager@OverrIDeprotected voID onCreate(Bundle saveInstanceState){	super.onCreate(saveInstanceState);	setContentVIEw(R.layout.activity_main);		localbroadcastManager = LocalbroadcastManager.getInstance(this);	intentFilter = new IntentFilter();	intentFilter.addAction("androID.net.conn.CONNECTIVITY_CHANGE");	mReceiver= new Customreceiver();	localbroadcastManager.registerReceiver(mReceiver,intentFilter);} @OverrIDeprotected voID onDestroy(){	super.onDestroy();	localbroadcastManager.unregisterReceiver(mReceiver);}class Customreceiver extends broadcastReceiver{	@OverrIDe	public voID onReceive(Context context,Intent intent){		//你的逻辑代码	}}

发送广播

private LocalbroadcastManager localbroadcastManager...Intent intent = new Intent("你的广播的action")localbroadcastManager.sendbroadcast(intent);...

6.不要滥用广播 总结

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