I can not understand for what reason the button with the ID totalButton, does not expand by 2 lines, although rowSpan="2" is specified.

I would be grateful if someone points to my mistake.

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <TextView android:id="@+id/memory_text_view" android:layout_width="match_parent" android:layout_height="50dp" android:layout_gravity="end" android:paddingTop="15dp" android:paddingRight="10dp" android:textAlignment="textEnd" tools:text="Memory Field" /> <TextView android:id="@+id/operation_text_view" android:layout_width="match_parent" android:layout_height="50dp" android:layout_gravity="end" android:paddingTop="15dp" android:paddingRight="10dp" android:textAlignment="textEnd" tools:text="Operation Field" /> <GridLayout android:layout_width="match_parent" android:layout_height="match_parent" android:columnCount="4" android:rowCount="5"> <ImageButton android:layout_column="0" android:layout_row="0" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/sumButton"/> <ImageButton android:layout_column="1" android:layout_row="0" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/differenceButton"/> <ImageButton android:layout_column="2" android:layout_row="0" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/multiplicationButton"/> <ImageButton android:layout_column="3" android:layout_row="0" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/divisionButton"/> <ImageButton android:layout_column="0" android:layout_row="1" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/button7"/> <ImageButton android:layout_column="1" android:layout_row="1" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/button8"/> <ImageButton android:layout_column="2" android:layout_row="1" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/button9"/> <ImageButton android:layout_column="3" android:layout_row="1" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/clearButton"/> <ImageButton android:layout_column="0" android:layout_row="2" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/button4"/> <ImageButton android:layout_column="1" android:layout_row="2" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/button5"/> <ImageButton android:layout_column="2" android:layout_row="2" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/button6"/> <ImageButton android:layout_column="3" android:layout_row="2" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/notYetDefinied"/> <ImageButton android:layout_column="0" android:layout_row="3" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/button1"/> <ImageButton android:layout_column="1" android:layout_row="3" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/button2"/> <ImageButton android:layout_column="2" android:layout_row="3" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/button3"/> <ImageButton android:layout_column="3" android:layout_row="3" android:layout_rowSpan="2" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/totalButton"/> <ImageButton android:layout_column="0" android:layout_row="4" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/button0"/> <ImageButton android:layout_column="1" android:layout_row="4" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/commaButton"/> <ImageButton android:layout_column="2" android:layout_row="4" android:src="@mipmap/ic_launcher" android:layout_width="102dp" android:id="@+id/reverseButton"/> </GridLayout> </LinearLayout> </LinearLayout>

    1 answer 1

    In fact, for the totalButton button, the area of ​​two cells is available (vertically), but to stretch this button over the entire available area, you need to add an attribute to this button:

     android:layout_gravity="fill"

    To stretch a button in height, add an attribute:

     android:layout_gravity="fill_vertical"

    In your case, any of these attributes will work, but the second one will be preferable.

    • Thank you for your reply. - Arc