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  1. POHow to align linearlayout to vertical center?
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    copied!<p>I'm tyring to align linearlayout's vertical center which shows following pic (skycolor border) to delete button's vertical center.</p> <p>so I set gravity of id:groupNumbers to center_vertical.</p> <p>but no changed. </p> <p>How to align id:groupNumbers to buttons's center?</p> <p><img src="https://i.stack.imgur.com/Xo100.png" alt="enter image description here"></p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="match_parent"&gt; &lt;LinearLayout android:id="@+id/groupNumbers" android:orientation="horizontal" android:gravity="center_vertical" android:layout_weight="0.7" android:layout_width="wrap_content" android:layout_height="wrap_content"&gt; &lt;LinearLayout android:orientation="horizontal" android:layout_weight="1" android:layout_width="wrap_content" android:layout_height="wrap_content"&gt; &lt;TextView android:id="@+id/txtSelected01" android:text="00" android:textSize="30dp" android:gravity="center_horizontal" android:layout_weight="1" android:layout_width="wrap_content" android:layout_height="wrap_content"/&gt; &lt;/LinearLayout&gt; &lt;LinearLayout android:orientation="horizontal" android:layout_weight="1" android:layout_width="wrap_content" android:layout_height="wrap_content"&gt; &lt;TextView android:id="@+id/txtSelected02" android:text="00" android:textSize="30dp" android:gravity="center_horizontal" android:layout_weight="1" android:layout_width="0dp" android:layout_height="wrap_content"/&gt; &lt;/LinearLayout&gt; &lt;/LinearLayout&gt; &lt;Button android:id="@+id/btn_deleteNum" android:text="Delete" android:textSize="20dp" android:layout_weight="0.2" android:layout_width="wrap_content" android:layout_height="wrap_content"/&gt; &lt;/LinearLayout&gt; </code></pre>
 

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