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ChaosCrystal/ActionBar/为ActionBar添加返回按钮.md
@@ -22,6 +22,7 @@ getSupportActionBar().setDisplayHomeAsUpEnabled(true);
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监听返回按钮事件
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> 它的 id 是 home,可以使用重载 `onOptionsItemSelected` 的方式进行监听。
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+
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``` java
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@Override
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public boolean onOptionsItemSelected(MenuItem item)
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