Why button is not centered vertically in LinearLayout?
android
Solution
You say in words that you want this to be centered vertically, but you have not said in XML that you want this to be centered vertically. You will need to adjust your `android:layout_gravity` attribute to specify both `right` and `center_vertical`.
However, I would recommend you go back to `RelativeLayout`. Use `android:layout_centerVertical="true"` and `android:layout_alignParentRight="true"` to make the button be centered vertically and right-aligned.
Also, bear in mind that your current `LinearLayout` has `android:layout_height="wrap_content"`, which means there is nothing to be centered inside. You need the container to have more space than its contents (e.g., `fill_parent`) if you want centering to have any meaning.
Problem
I have a LinearLayout, which only contains one button. I want this button to be centered vertically and aligned to the right. I tried many ways, but I couldn't make this button centered vertically. It is always aligned to the top. I also tried to put a button in RelativeLayout, the button can not be centered vertically either. The XML is as below. Is there anything wrong with this layout? Thanks. ``` <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="#E8E3E4"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="More" android:layout_gravity="right" /> </LinearLayout> ``` Changing android:layout_gravity="right" to android:layout_gravity="right|center_vertical" didn't resolve the problem in my question.