netkiller.github.io/java/android/EventBus.priority.html at master · vsnotebook/netkiller.github.io · GitHub

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<a xmlns="" href="//www.netkiller.cn/home/about.html">About</a><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">53.6. 事件优先级</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="EventBus.builder.html">上一页</a> </td><th width="60%" align="center">第 53 章 EventBus</th><td width="20%" align="right"> <a accesskey="n" href="ThrowableFailureEvent.html">下一页</a></td></tr></table><hr /></div><table xmlns=""><tr><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=watch&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=fork&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&type=follow&count=true&size=large" height="30" width="240" frameborder="0" scrolling="0" style="width:240px; height: 30px;" allowTransparency="true"></iframe></td></tr></table><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="EventBus.priority"></a>53.6. 事件优先级</h2></div></div></div>

<p>priority 数值越大优先级又高</p>

// MainActivity

@Subscribe(priority = 2)

public void onMessageEvent(MessageEvent event) {

Toast.makeText(this, event.message, Toast.LENGTH_SHORT).show();

}

// SecondActivity

@Subscribe(priority = 1)

public void onMessageSecondEvent(MessageEvent event) {

Toast.makeText(this, event.message, Toast.LENGTH_SHORT).show();

}

</pre>

<p>时间拦截，MainActivity 收到信息后调用 EventBus.getDefault().cancelEventDelivery(event); 之后所有订阅将收不到信息。</p>

// MainActivity

@Subscribe(priority = 2)

public void onMessageEvent(MessageEvent event) {

Toast.makeText(this, event.message, Toast.LENGTH_SHORT).show();

EventBus.getDefault().cancelEventDelivery(event);

}

// SecondActivity

@Subscribe(priority = 1)

public void onMessageSecondEvent(MessageEvent event) {

Toast.makeText(this, event.message, Toast.LENGTH_SHORT).show();

}

</pre>

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netkiller.github.io/java/android/EventBus.priority.html at master · vsnotebook/netkiller.github.io · GitHub

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