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in Technique[技术] by (71.8m points)

android - LinearLayout: layout_gravity="bottom" not working on Horizontal LinearLayout

Ok, First of all, I searched all the internet, but nobody has a similar problem like this. So, all I want is to have 3 textViews, bottom aligned with the screen and with the same width. Here is an image representing what I want:

enter image description here

And here is my code:

 <RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent">
 <LinearLayout 
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_alignParentBottom="true">

      <TextView 
           android:text="@string/help_1"
           android:layout_weight="0.33"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:background="@drawable/mynicebg1"

           android:layout_gravity="bottom"/>

      <TextView 
           android:text="@string/help_2"
           android:layout_weight="0.33"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:background="@drawable/mynicebg2"

           android:layout_gravity="bottom"/>

      <TextView 
           android:text="@string/help_3"
           android:layout_weight="0.33"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:background="@drawable/mynicebg3"

           android:layout_gravity="bottom"/>

 </LinearLayout>
 </RelativeLayout>

Well, it works when the 3 textViews have the same height, but when their size differ, I get the following result:

problem

Another strange behavior, is that when I set the layout_gravity of the biggest text to "center-vertical", I get the following result:

first workaround

So obviously, I went crazy and tried another combinations with center-vertical, but nothing worked as I wanted initially:

desperation workaround

So, any tips on how to solve this?

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1 Reply

0 votes
by (71.8m points)

The Correct Answer

All the other answers are wrong. The important points:

  1. You don't need RelativeLayout. You can do this with just a LinearLayout.
  2. (Not critical but I guess you didn't know) Your weights don't need to sum to 1, you can just set them all to any equal value (e.g. 1).
  3. The critical thing is you need android:baselineAligned="false". I actually only found this by looking through the LinearLayout source. It is in the docs but they don't mention that it is on by default!

Anyway, here is the code:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:baselineAligned="false">
      <TextView 
           android:text="dfg dfg dfg dfg dfg dfg dfg dfg dfg dfg dfg dfg dfg dfg dfg dfg dfg dfg dfg dfg"
           android:layout_weight="1"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:background="#eeffee"
           android:layout_gravity="bottom"/>

      <TextView 
           android:text="asd asd asd asd asd asd asd asd asd asd"
           android:layout_weight="1"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:background="#eeeeff"
           android:layout_gravity="bottom"/>


      <TextView 
           android:text="qweoiu qweoiuqwe oiqwe qwoeiu qweoiu qweoiuq weoiuqw eoiquw eoiqwue oqiweu qowieu qowieu qoiweu qowieu qowieu qowieu qowieu qoiweu qowieu qoiwue "
           android:layout_weight="1"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:background="#ffeeee"
           android:layout_gravity="bottom"/>

 </LinearLayout>

And how it looks:

Good linear layout


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