java - How to make a TextView bold? -

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i want able make textview bold. how setting it's appearance (i need in code):

nametext.settextappearance(getapplicationcontext(), r.style.bluetext); pricetext.settextappearance(getapplicationcontext(), r.style.bluetext); changetext.settextappearance(getapplicationcontext(), r.style.bluetext);

here style.xml

  <!-- blue color -->    <style name="bluetext">         <item name="android:textcolor">#4871a8</item>     </style>

how can make sure textview bolded?

  <!-- blue color -->    <style name="bluetext">         <item name="android:textcolor">#4871a8</item>         <item name="android:textstyle">bold</item>     </style>

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