How to make buttons cover full screen width in Android Linear Layout?

Question

I have following three button in a Linear Layout with width fill_parent.

How can I set the width of these buttons to equally cover the whole screen area?

<Button 
   android:layout_width="wrap_content" 
   android:layout_height="wrap_content" 
   android:id="@+id/btnReplyMessage" 
   android:gravity="left"
   android:text="Reply" 
/>
    
<Button 
   android:layout_width="wrap_content" 
   android:layout_height="wrap_content" 
   android:id="@+id/btnMarkAsUnread"
   android:gravity="left" 
   android:text="Mark as unread" 
/>
            
<ImageButton 
   android:id="@+id/btnDeleteMessage"
   android:src="@drawable/imgsearch"
   android:gravity="right" 
   android:layout_height="wrap_content"
   android:layout_width="wrap_content"
   android:layout_alignParentRight="true"
 />

Answer 1

You should just specify these attributes for each button:

android:layout_width="fill_parent"
android:layout_weight="1"

So it should be something like that:

<LinearLayout
  android:layout_width="fill_parent"
  android:layout_height="wrap_content">
  <Button
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"/>
  <Button
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"/>
  <Button
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"/>
</LinearLayout>

Answer 2

you can use following code:

  <Button
  android:layout_width="0dp"
  android:layout_height="wrap_content"
  android:layout_weight="1"/>

You must to do 0dp in width on every button.