Make buttons have the same width in layout

Make buttons have the same width in layout - android

I put 4 buttons in a relative layout.
I want them to have the same width, and fix for any screen size of a phone.
My code as below:
<RelativeLayout
android:id="#+id/relativeLayout1"
android:layout_width="match_parent"
android:layout_height="38dp" >
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="Button" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/button1"
android:text="Button" />
<Button
android:id="#+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/button2"
android:text="Button" />
<Button
android:id="#+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/button3"
android:text="Button" />
</RelativeLayout>
What should I modify?

Switch to a LinearLayout and give all the buttons equal weight.
for example:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="38dp"
android:orientation="horizontal">
<Button android:layout_weight="1"
android:layout_height="wrap_content"
android:layout_width="match_parent" />
<Button android:layout_weight="1"
android:layout_height="wrap_content"
android:layout_width="match_parent" />
<Button android:layout_weight="1"
android:layout_height="wrap_content"
android:layout_width="match_parent" />
</LinearLayout>

Related

layout alignment for different screens

i am trying to align the page for different screens namely 4.5inch(xperia ion) and 4inch(s advance) it works with s advance.. but in xperia ion screen it breaks..
the emulator image of both xperia ion and s advance...
i stretched the buttons to avoid mistakes.. but yet when it comes to services.. the system fails... the big buttons on top and bottom are buffer buttons.. they are meant to simply align the rest..
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#drawable/rail" >
<Button
android:id="#+id/btnBufferTop" <-- buffer top button
android:layout_width="wrap_content"
android:layout_height="130dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="Button" />
<Button
android:id="#+id/btnBufferBottom" <-- buffer bottom button
android:layout_width="wrap_content"
android:layout_height="60dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:text="Button" />
<Button
android:id="#+id/button1" <-- home button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="#+id/btnBufferTop"
android:text="Button" />
<Button
android:id="#+id/button2" <-- About us button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="#+id/button1"
android:text="Button" />
<Button
android:id="#+id/button3" <-- services
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/btnBufferBottom"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:text="Button" />
<Button
android:id="#+id/button4" <-- clients
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/button3"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:text="Button" />
<Button
android:id="#+id/button5" <-- contacts
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/button4"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="14dp"
android:text="Button" />
is there any other way to do it???? without buffer buttons

// Try this way,hope this will help you to solve your problem...
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:id="#+id/btnBufferTop"
android:layout_width="match_parent"
android:layout_height="130dp"
android:text="Button" />
<Button
android:id="#+id/btnBufferBottom"
android:layout_width="match_parent"
android:layout_height="60dp"
android:text="Button" />
<Button
android:id="#+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/button2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/button3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/button4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/button5"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="14dp"
android:text="Button" />
</LinearLayout>

its better to go with linear layout with weights.as weights device each screen in equal parts.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum= 2
android:orientation="vertical">
<Button
android:id="#+id/btnBufferTop"
android: layout_weight="1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:text="Button" />
<Button
android:id="#+id/btnBufferBottom"
android: layout_weight="1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:text="Button" />
</LinearLayout>

If the space between the buttons are the issue, thenTry android:layout_marginTop=""

<?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="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#android:color/white"
android:orientation="vertical"
android:gravity="center">
<Button
android:id="#+id/okbutton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="SET"
/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#android:color/white"
android:orientation="vertical"
android:gravity="center">
<Button
android:id="#+id/okbuttodn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="SET"
/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#android:color/white"
android:orientation="vertical"
android:gravity="center">
<Button
android:id="#+id/okbuttdtgyodn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="SET"
/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#android:color/white"
android:orientation="vertical"
android:gravity="center">
<Button
android:id="#+id/okbuttrtodn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="SET"
/>
</LinearLayout>
</LinearLayout>

Improper alignment of buttons in RelativeLayout

I used several RelativeLayouts within one LinearLayout. And the RelativeLayout used for buttons caused improper appearance as seen below:
This is my .xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/ll1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/wood"
android:orientation="vertical"
android:padding="25dp" >
<RelativeLayout
android:id="#+id/relative"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<Button
android:id="#+id/button1"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="Button" />
<Button
android:id="#+id/button2"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/button1"
android:text="Button" />
<Button
android:id="#+id/button3"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/button2"
android:text="Button" />
<Button
android:id="#+id/button4"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="Button" />
</RelativeLayout>
<RelativeLayout
android:id="#+id/relative2"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<Button
android:id="#+id/btn5"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="Button" />
<Button
android:id="#+id/btn8"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="Button" />
<Button
android:id="#+id/btn7"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toLeftOf="#+id/btn8"
android:text="Button" />
<Button
android:id="#+id/btn6"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toLeftOf="#+id/btn7"
android:text="Button" />
</RelativeLayout>
</LinearLayout>
How can I align my buttons properly and nicely without using Grid View since it requires additional library and API 14 and above? Thank you.

Instead of RelativeLayouts use LinearLayouts horizontally oriented:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/ll1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/wood"
android:orientation="vertical"
android:padding="25dp" >
<LinearLayout
android:id="#+id/relative"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="#+id/button1"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/button2"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/button3"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/button4"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
</LinearLayout>
<LinearLayout
android:id="#+id/relative2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="#+id/btn5"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/btn8"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/btn7"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/btn6"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
</LinearLayout>
</LinearLayout>

How can I add more button on my Android application which already includes a scrollview?

I have a Android application that includes a xml file that includes a scrolview and I added some buttons in this layout and I want to add more buttons (when I add on graphical layout content get defaced) but I can't add more here is also my xml file
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".DualarMainActivity" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/dualarbackround"
android:orientation="vertical" >
<Button
android:id="#+id/button6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/button5"
android:layout_alignRight="#+id/button2"
android:layout_below="#+id/button5"
android:layout_marginTop="20dp"
android:text="Button" />
<Button
android:id="#+id/button3"
android:layout_width="248dp"
android:layout_height="wrap_content"
android:layout_below="#+id/button2"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp"
android:text="Button" />
<Button
android:id="#+id/button2"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/button3"
android:layout_below="#+id/button1"
android:layout_marginTop="20dp"
android:text="Button" />
<Button
android:id="#+id/button1"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignRight="#+id/button3"
android:layout_marginTop="240dp"
android:text="Button" />
<Button
android:id="#+id/button4"
android:layout_width="256dp"
android:layout_height="wrap_content"
android:layout_below="#+id/button3"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp"
android:text="Button" />
<Button
android:id="#+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/button3"
android:layout_alignRight="#+id/button4"
android:layout_below="#+id/button4"
android:layout_marginTop="20dp"
android:text="Button" />
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:src="#drawable/bismillah" android:contentDescription="TODO"/>
<Button
android:id="#+id/button7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/button1"
android:layout_alignRight="#+id/button1"
android:layout_below="#+id/imageView1"
android:layout_marginTop="50dp"
android:text="Button" />
<Button
android:id="#+id/button8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/button7"
android:layout_alignLeft="#+id/button4"
android:layout_alignRight="#+id/button7"
android:layout_marginBottom="65dp"
android:text="Button" />
</RelativeLayout>
</ScrollView>

okey ı have solve the problem while changing
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/dualarbackround"
android:orientation="vertical" >
TO
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="1500dp"
android:background="#drawable/dualarbackround"
android:orientation="vertical" >
(I HAVE CHANGED RELATİVE LAYOUT'S HEIGHT WRAP CONTENT TO ANOTHER NUMBER WİTH THE UNIT OF db (density pixel) )

How to stretch the component to match the width of parent components in Android layout?

Below is the layout I designed.
Here is my code:
<LinearLayout
android:id="#+id/digitRow1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal" >
<Button
android:id="#+id/button1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="#string/login_button_1" />
<Button
android:id="#+id/button2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="#string/login_button_2" />
<Button
android:id="#+id/button3"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="#string/login_button_3" />
</LinearLayout>
<LinearLayout
android:id="#+id/digitRow2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal" >
<Button
android:id="#+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/login_button_4" />
<Button
android:id="#+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/login_button_5" />
<Button
android:id="#+id/button6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/login_button_6" />
</LinearLayout>
<LinearLayout
android:id="#+id/digitRow3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal" >
<Button
android:id="#+id/button7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/login_button_7" />
<Button
android:id="#+id/button8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/login_button_8" />
<Button
android:id="#+id/button9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/login_button_9" />
</LinearLayout>
<LinearLayout
android:id="#+id/digitRow4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="#+id/buttonClear"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/login_button_clear" />
<Button
android:id="#+id/button0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/login_button_0" />
<Button
android:id="#+id/buttonBack"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/login_button_back" />
</LinearLayout>
<LinearLayout
android:id="#+id/buttonRow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:orientation="horizontal"
android:padding="5dp" >
<Button
android:id="#+id/buttonChange"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/login_button_dhange" />
<Button
android:id="#+id/buttonDisable"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/login_button_disable" />
</LinearLayout>
The problem is that I want to stretch the bottom two buttons, "Change" and "Back", to match the width of the buttons above.

You can use weight on both of them, like this:
<LinearLayout
android:id="#+id/buttonRow"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:orientation="horizontal"
android:padding="5dp" >
<Button
android:id="#+id/buttonChange"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1.0"
android:text="#string/login_button_dhange" />
<Button
android:id="#+id/buttonDisable"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1.0"
android:text="#string/login_button_disable" />

You probably want something like the code below.
I used a hard coded button width, but you probably want to put this in dimen.xml and reference it. I centered everything with gravity.
I tried this with weights as well, but the re-sizing is funny. As your screen gets wider the buttons get two wide.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:gravity="center_horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/digitRow1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal" >
<Button
android:id="#+id/button1"
android:layout_width="100dp"
android:layout_height="match_parent"
android:text="1" />
<Button
android:id="#+id/button2"
android:layout_width="100dp"
android:layout_height="match_parent"
android:text="2" />
<Button
android:id="#+id/button3"
android:layout_width="100dp"
android:layout_height="match_parent"
android:text="3" />
</LinearLayout>
<LinearLayout
android:id="#+id/digitRow2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal" >
<Button
android:id="#+id/button4"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="4" />
<Button
android:id="#+id/button5"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="5" />
<Button
android:id="#+id/button6"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="6" />
</LinearLayout>
<LinearLayout
android:id="#+id/digitRow3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal" >
<Button
android:id="#+id/button7"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="7" />
<Button
android:id="#+id/button8"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="8" />
<Button
android:id="#+id/button9"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="9" />
</LinearLayout>
<LinearLayout
android:id="#+id/digitRow4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal" >
<Button
android:id="#+id/buttonClear"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="Clear" />
<Button
android:id="#+id/button0"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="0" />
<Button
android:id="#+id/buttonBack"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="Back" />
</LinearLayout>
<LinearLayout
android:id="#+id/buttonRow"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:orientation="horizontal"
android:padding="5dp"
android:gravity="center_horizontal"
>
<Button
android:id="#+id/buttonChange"
android:layout_width="150dp"
android:layout_height="wrap_content"
android:text="Change" />
<Button
android:id="#+id/buttonDisable"
android:layout_width="150dp"
android:layout_height="wrap_content"
android:text="Disable" />
</LinearLayout>

Try to use weight like below. Also use margins to tweak the positions of the buttons.
<LinearLayout
android:id="#+id/buttonRow"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:orientation="horizontal"
android:padding="5dp" >
<Button
android:id="#+id/buttonChange"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1.0"
android:text="#string/login_button_dhange" />
<Button
android:id="#+id/buttonDisable"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1.0"
android:text="#string/login_button_disable" />

android overflow views in layout

not sure whether I'm phrasing this question correctly but ..
how do i get the buttons to start in a new line
the goal is to have only 3 buttons in a line without splitting them into different linear layouts
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="#string/hello_world"
tools:context=".MainActivity" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:orientation="horizontal" >
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/button6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="#+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
</LinearLayout>

You can use GridView and specify a column width of 3

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Make buttons have the same width in layout - android

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layout alignment for different screens

Improper alignment of buttons in RelativeLayout

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How to stretch the component to match the width of parent components in Android layout?

android overflow views in layout

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