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Android 中 ActionBar 的 setXXXEnabled 方法的理解 - MayGodBlessYou
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<h1>Android 中 ActionBar 的 setXXXEnabled 方法的理解</h1>
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<span class="date">2015/06/14</span>
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<p>setHomeButtonEnabled 这个方法在小于4.0版本的默认值是true，但是在4.0及其以上是false，该方法的作用：决定左上角的图标是否可以点击，没有向左的小图标。true则图标可以点击，false则不可以点击。</p>
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<pre><code class="language-plain_text"> actionBar.setDisplayHomeAsUpEnabled(true) // 给左上角图标的左边加上一个返回的图标 。对应ActionBar.DISPLAY_HOME_AS_UP。
actionBar.setDisplayShowHomeEnabled(true) //使左上角图标是否显示，如果设成false，则没有程序图标，仅仅就个标题，否则，显示应用程序图标。
actionBar.setDisplayShowCustomEnabled(true) // 使自定义的普通View能在title栏显示，即actionBar.setCustomView能起作用，对应ActionBar.DISPLAY_SHOW_CUSTOM。
actionBar.setDisplayShowTitleEnabled(true) //对应ActionBar.DISPLAY_SHOW_TITLE。
</code></pre>
<p>其中setHomeButtonEnabled和setDisplayShowHomeEnabled共同起作用，如果setHomeButtonEnabled设成false，即使setDisplayShowHomeEnabled设成true，图标也不能点击。</p>
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