Develop Reference

Scrolling in GridLayout

I am designing an app in which I have to display image buttons in 10 rows and 2 columns, so I chose grid layout design to arrange them. However, I'm having difficulty in linking the scrollbar to it. The code for GridLayout is given below:
<GridLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnCount="2"
android:rowCount="10"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true">
<ImageButton
android:layout_marginBottom="20dp"
android:layout_width="165dp"
android:layout_height="75dp"
android:background="#drawable/navbharat"
android:id="#+id/navbharat"
android:layout_gravity="left"
android:scaleType="centerCrop"
android:layout_row="0"
android:layout_column="0" />
<ImageButton
android:layout_width="165dp"
android:layout_height="75dp"
android:background="#drawable/ajjtak"
android:id="#+id/ajjtak"
android:layout_gravity="right"
android:scaleType="centerCrop"
android:layout_below="#+id/navbharat"
android:layout_alignParentStart="true"
android:layout_row="0"
android:layout_column="1"/>
<ImageButton
android:layout_marginBottom="20dp"
android:layout_width="165dp"
android:layout_height="75dp"
android:background="#drawable/abpnews"
android:id="#+id/imageButton"
android:layout_gravity="left"
android:scaleType="centerCrop"
android:layout_below="#+id/ajjtak"
android:layout_alignParentStart="true"
android:layout_row="1"
android:layout_column="0"
/>
<ImageButton
android:layout_gravity="right"
android:layout_width="165dp"
android:layout_height="75dp"
android:background="#drawable/amarujala"
android:id="#+id/imageButton3"
android:layout_row="1"
android:layout_column="1"/>
<ImageButton
android:layout_marginBottom="20dp"
android:layout_width="165dp"
android:layout_height="75dp"
android:background="#drawable/dainikbhaskar"
android:id="#+id/imageButton5"
android:layout_row="2"
android:layout_column="0"/>
<ImageButton
android:layout_gravity="right"
android:layout_width="165dp"
android:layout_height="75dp"
android:layout_row="2"
android:layout_column="1"
android:background="#drawable/dainikjagran"
android:id="#+id/imageButton6" />
<ImageButton
android:layout_marginBottom="20dp"
android:layout_width="165dp"
android:layout_height="75dp"
android:layout_row="3"
android:layout_column="0"
android:background="#drawable/dainiknavjyoti"
android:id="#+id/imageButton7" />
<ImageButton
android:layout_gravity="right"
android:layout_width="165dp"
android:layout_height="75dp"
android:layout_row="3"
android:layout_column="1"
android:background="#drawable/googlenews"
android:id="#+id/imageButton8" />
<ImageButton
android:layout_marginBottom="20dp"
android:layout_width="165dp"
android:layout_height="75dp"
android:layout_row="4"
android:layout_column="0"
android:background="#drawable/aryan"
android:id="#+id/imageButton9" />
<ImageButton
android:layout_gravity="right"
android:layout_width="165dp"
android:layout_height="75dp"
android:layout_row="4"
android:layout_column="1"
android:background="#drawable/cnbc"
android:id="#+id/imageButton10" />
<ImageButton
android:layout_marginBottom="20dp"
android:layout_width="165dp"
android:layout_height="75dp"
android:layout_row="5"
android:layout_column="0"
android:background="#drawable/ddnews"
android:id="#+id/imageButton11" />
<ImageButton
android:layout_gravity="right"
android:layout_width="165dp"
android:layout_height="75dp"
android:layout_row="5"
android:layout_column="1"
android:background="#drawable/graminrajasthan"
android:id="#+id/imageButton12" />
<ImageButton
android:layout_marginBottom="20dp"
android:layout_width="165dp"
android:layout_height="75dp"
android:layout_row="6"
android:layout_column="0"
android:background="#drawable/haribhoomi"
android:id="#+id/imageButton14" />
<ImageButton
android:layout_gravity="right"
android:layout_width="165dp"
android:layout_height="75dp"
android:layout_row="5"
android:layout_column="1"
android:background="#drawable/ibn7"
android:id="#+id/imageButton15" />
</GridLayout>

GridLayout it doesn't need any scrollview for this. Elements in a gridview automatically arranged in a fixed scroll view so that you need not implement any additional scrollview to scroll it.

You can use this
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Gridlayout>
your code
</Gridlayout>
</ScrollView>

GridLayout columns do not appear right

I tried to configure a grid layout with 2 rows and 2 columns. But each element here occupies the entire width of the screen, while the second column is outside the screen. Please suggest what am I doing wrong here.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorTheme"
android:orientation="vertical">
<GridLayout
android:id="#+id/moodsGridLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/textView2"
android:columnCount="2"
android:orientation="vertical"
android:rowCount="2">
<ImageButton
android:id="#+id/imageButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_column="0"
android:layout_row="0"
app:srcCompat="#mipmap/brewtv_logos" />
<ImageButton
android:id="#+id/imageButton2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_column="1"
android:layout_row="0"
app:srcCompat="#mipmap/brewtv_logos" />
<ImageButton
android:id="#+id/imageButton3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_column="0"
android:layout_row="1"
app:srcCompat="#mipmap/brewtv_logos" />
<ImageButton
android:id="#+id/imageButton4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_column="1"
android:layout_row="1"
app:srcCompat="#mipmap/brewtv_logos" />
</GridLayout>
</LinearLayout>

Try this:
for Uniform width column and row in Gridlayout use:
android:layout_columnWeight="1"
android:layout_rowWeight="1"
use this layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/color_white"
android:orientation="vertical">
<GridLayout
android:id="#+id/moodsGridLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/textView2"
android:columnCount="2"
android:orientation="vertical"
android:rowCount="2">
<ImageButton
android:id="#+id/imageButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="0"
android:layout_columnWeight="1"
android:layout_row="0"
android:layout_rowWeight="1"
android:src="#mipmap/ic_launcher" />
<ImageButton
android:id="#+id/imageButton2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="1"
android:layout_columnWeight="1"
android:layout_row="0"
android:layout_rowWeight="1"
android:src="#mipmap/ic_launcher" />
<ImageButton
android:id="#+id/imageButton3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="0"
android:layout_columnWeight="1"
android:layout_row="1"
android:layout_rowWeight="1"
android:src="#mipmap/ic_launcher" />
<ImageButton
android:id="#+id/imageButton4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="1"
android:layout_columnWeight="1"
android:layout_row="1"
android:layout_rowWeight="1"
android:src="#mipmap/ic_launcher" />
</GridLayout>
</LinearLayout>
Output:

Image alignment issue using gridlayout

I had some problem with the alignment for the picture when I export the APK to phone for test. The alignment is totally different and out of the grid.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="sg.edu.rp.c346.tictactoee.MainActivity"
tools:showIn="#layout/activity_main">
<GridLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/board"
android:columnCount="4"
android:rowCount="3"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:id="#+id/gridLayout">
<ImageView
android:layout_width="90dp"
android:layout_height="90dp"
android:id="#+id/imageView0"
android:layout_row="0"
android:layout_column="0"
android:onClick="gameLogic"
android:tag="0"
android:layout_marginLeft="0dp"
android:layout_marginTop="50dp" />
<ImageView
android:layout_width="90dp"
android:layout_height="90dp"
android:id="#+id/imageView1"
android:layout_row="0"
android:layout_column="1"
android:onClick="gameLogic"
android:tag="1"
android:layout_marginTop="50dp"
android:layout_marginLeft="7dp" />
<ImageView
android:layout_width="90dp"
android:layout_height="90dp"
android:id="#+id/imageView2"
android:layout_row="0"
android:layout_column="2"
android:layout_marginLeft="20dp"
android:layout_marginTop="50dp"
android:onClick="gameLogic"
android:tag="2" />
<ImageView
android:layout_width="90dp"
android:layout_height="90dp"
android:id="#+id/imageView3"
android:layout_row="1"
android:layout_column="0"
android:layout_marginLeft="0dp"
android:layout_marginTop="50dp"
android:onClick="gameLogic"
android:tag="3"/>
<ImageView
android:layout_width="90dp"
android:layout_height="90dp"
android:id="#+id/imageView4"
android:layout_row="1"
android:layout_column="1"
android:layout_marginTop="50dp"
android:layout_marginLeft="7dp"
android:onClick="gameLogic"
android:tag="4"/>
<ImageView
android:layout_width="90dp"
android:layout_height="90dp"
android:id="#+id/imageView5"
android:layout_row="1"
android:layout_column="2"
android:layout_marginLeft="15dp"
android:layout_marginTop="50dp"
android:onClick="gameLogic"
android:tag="5"/>
<ImageView
android:layout_width="90dp"
android:layout_height="90dp"
android:id="#+id/imageView6"
android:layout_row="2"
android:layout_column="0"
android:layout_marginLeft="0dp"
android:layout_marginTop="30dp"
android:onClick="gameLogic"
android:tag="6"/>
<ImageView
android:layout_width="90dp"
android:layout_height="90dp"
android:id="#+id/imageView7"
android:layout_row="2"
android:layout_column="1"
android:layout_marginTop="30dp"
android:layout_marginLeft="7dp"
android:onClick="gameLogic"
android:tag="7"/>
<ImageView
android:layout_width="90dp"
android:layout_height="90dp"
android:id="#+id/imageView8"
android:layout_row="2"
android:layout_column="2"
android:layout_marginLeft="15dp"
android:layout_marginTop="30dp"
android:onClick="gameLogic"
android:tag="8"/>
</GridLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:background="#1eccd5"
android:padding="35dp"
android:id="#+id/winnerLayout">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="#+id/textView"
android:textColor="#FFFFFFFF" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Play Again"
android:id="#+id/button"
android:onClick="playAgain" />
</LinearLayout>
</RelativeLayout>
It shows like this using android studio:
However, when I export it to my android phone, the alignment totally changes and out of grid, anyone able to help me ?

I guess you are new to Android.
Android uses device's dimensions while creating any view(screen) on your device.
Android supports different dimensions like,
hdpi
xhdpi
xxhdpi
xxxhdpi etc.
So for your case, Android System try to fit all views in absolute size given by you.
I suggest use wrap_content for width and height of your view.
You can modify your layout file as below:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<GridLayout
android:id="#+id/gridLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:columnCount="4"
android:rowCount="3">
<ImageView
android:id="#+id/imageView0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="0"
android:layout_row="0"
android:onClick="gameLogic"
android:padding="30dp"
android:src="#android:drawable/ic_menu_add"
android:tag="0"/>
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="1"
android:layout_row="0"
android:onClick="gameLogic"
android:padding="30dp"
android:src="#android:drawable/ic_menu_add"
android:tag="1"/>
<ImageView
android:id="#+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="2"
android:layout_row="0"
android:onClick="gameLogic"
android:padding="30dp"
android:src="#android:drawable/ic_menu_add"
android:tag="2"/>
<ImageView
android:id="#+id/imageView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="0"
android:layout_row="1"
android:onClick="gameLogic"
android:padding="30dp"
android:src="#android:drawable/ic_menu_add"
android:tag="3"/>
<ImageView
android:id="#+id/imageView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="1"
android:layout_row="1"
android:onClick="gameLogic"
android:padding="30dp"
android:src="#android:drawable/ic_menu_add"
android:tag="4"/>
<ImageView
android:id="#+id/imageView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="2"
android:layout_row="1"
android:onClick="gameLogic"
android:padding="30dp"
android:src="#android:drawable/ic_menu_add"
android:tag="5"/>
<ImageView
android:id="#+id/imageView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="0"
android:layout_row="2"
android:onClick="gameLogic"
android:padding="30dp"
android:src="#android:drawable/ic_menu_add"
android:tag="6"/>
<ImageView
android:id="#+id/imageView7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="1"
android:layout_row="2"
android:onClick="gameLogic"
android:padding="30dp"
android:src="#android:drawable/ic_menu_add"
android:tag="7"/>
<ImageView
android:id="#+id/imageView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="2"
android:layout_row="2"
android:onClick="gameLogic"
android:padding="30dp"
android:src="#android:drawable/ic_menu_add"
android:tag="8"/>
</GridLayout>
<LinearLayout
android:id="#+id/winnerLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:background="#1eccd5"
android:orientation="vertical"
android:padding="35dp"
android:visibility="gone">
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#FFFFFFFF"/>
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="playAgain"
android:text="Play Again"/>
</LinearLayout>
</RelativeLayout>
You can change padding and src as per your requirement.
Please add image how you want it if this differs!
For more information, Please check this link.

Add padding in your Image view
android:padding="10dp"
For example:
<ImageView
android:layout_width="90dp"
android:layout_height="90dp"
android:id="#+id/imageView0"
android:layout_row="0"
android:layout_column="0"
android:padding="10dp"
android:onClick="gameLogic"
android:tag="0"
android:layout_marginLeft="0dp"
android:layout_marginTop="50dp" />
This will solve your issue.

Change GridLayout to android.support.v7.widget.GridLayout
Add
app:columnCount="3"
app:rowCount="3"
to GridView
On ImageView use
app:layout_columnWeight="1"
app:layout_rowWeight="1"
instead of
android:layout_width="90dp"
android:layout_height="90dp"
xml file will look like this,
<android.support.v7.widget.GridLayout
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="500dp"
app:columnCount="3"
app:orientation="horizontal"
app:rowCount="3"
app:useDefaultMargins="true">
<ImageView
app:layout_columnWeight="1"
app:layout_rowWeight="1"
android:id="#+id/imageView0"
android:tag="0"
android:background="#ff0000" />
<ImageView
app:layout_columnWeight="1"
app:layout_rowWeight="1"
android:id="#+id/imageView1"
android:onClick="gameLogic"
android:tag="1"
android:background="#ff0000"/>
<ImageView
app:layout_columnWeight="1"
app:layout_rowWeight="1"
android:id="#+id/imageView2"
android:background="#ff0000"
android:onClick="gameLogic"
android:tag="2" />
<ImageView
app:layout_columnWeight="1"
app:layout_rowWeight="1"
android:id="#+id/imageView3"
android:background="#ff0000"
android:onClick="gameLogic"
android:tag="3"/>
<ImageView
app:layout_columnWeight="1"
app:layout_rowWeight="1"
android:id="#+id/imageView4"
android:background="#ff0000"
android:onClick="gameLogic"
android:tag="4"/>
<ImageView
app:layout_columnWeight="1"
app:layout_rowWeight="1"
android:id="#+id/imageView5"
android:background="#ff0000"
android:onClick="gameLogic"
android:tag="5"/>
<ImageView
app:layout_columnWeight="1"
app:layout_rowWeight="1"
android:id="#+id/imageView6"
android:background="#ff0000"
android:onClick="gameLogic"
android:tag="6"/>
<ImageView
app:layout_columnWeight="1"
app:layout_rowWeight="1"
android:id="#+id/imageView7"
android:background="#ff0000"
android:onClick="gameLogic"
android:tag="7"/>
<ImageView
app:layout_columnWeight="1"
app:layout_rowWeight="1"
android:id="#+id/imageView8"
android:background="#ff0000"
android:onClick="gameLogic"
android:tag="8"/>
</android.support.v7.widget.GridLayout>

button size are different in emulator from real device

I am a beginner and I created 8 buttons on gridLayout.The size of buttons are different here is a xml code:
<GridLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="0"
android:layout_row="0"
android:layout_gravity="fill"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:text="Hello"
android:id="#+id/hello"
android:onClick="buttonTapped"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="1"
android:layout_row="0"
android:layout_gravity="fill"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:text="How are you"
android:id="#+id/howareyou"
android:onClick="buttonTapped"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="0"
android:layout_row="1"
android:layout_gravity="fill"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:text="good evening"
android:id="#+id/goodevening"
android:onClick="buttonTapped"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="1"
android:layout_row="1"
android:layout_gravity="fill"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:text="please"
android:id="#+id/please"
android:onClick="buttonTapped"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="0"
android:layout_row="2"
android:layout_gravity="fill"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:text="my name is"
android:id="#+id/mynameis"
android:onClick="buttonTapped"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="1"
android:layout_row="2"
android:layout_gravity="fill"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:text="do you
speak english"
android:id="#+id/doyouspeakenglish"
android:onClick="buttonTapped"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="0"
android:layout_row="3"
android:layout_gravity="fill"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:text="welcome"
android:id="#+id/welcome"
android:onClick="buttonTapped"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="1"
android:layout_row="3"
android:layout_gravity="fill"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:text="i live in"
android:id="#+id/ilivein"
android:onClick="buttonTapped"/>
</GridLayout>
and here is the screenShot on Lg g3
real device Lg g3
and here is the screenShot on emulator emulator
what is the problem?

try LinearLayout with weightsum
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="4"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal"
android:weightSum="2"
android:padding="5dp"
>
<Button
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="Hello"
android:id="#+id/hello"
android:layout_marginRight="5dp"
android:layout_marginTop="6dp"
android:layout_marginBottom="3dp"
android:onClick="buttonTapped"
/>
<Button
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="How are you"
android:id="#+id/howareyou"
android:layout_marginLeft="5dp"
android:layout_marginTop="6dp"
android:layout_marginBottom="3dp"
android:onClick="buttonTapped"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal"
android:weightSum="2"
android:padding="5dp"
>
<Button
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="good evening"
android:id="#+id/goodevening"
android:layout_marginRight="5dp"
android:layout_marginTop="3dp"
android:layout_marginBottom="3dp"
android:onClick="buttonTapped"
/>
<Button
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="please"
android:id="#+id/please"
android:layout_marginLeft="5dp"
android:layout_marginTop="3dp"
android:layout_marginBottom="3dp"
android:onClick="buttonTapped"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal"
android:weightSum="2"
android:padding="5dp"
>
<Button
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="my name is"
android:id="#+id/mynameis"
android:layout_marginRight="5dp"
android:layout_marginTop="3dp"
android:layout_marginBottom="3dp"
android:onClick="buttonTapped"
/>
<Button
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="do you
speak english"
android:id="#+id/doyouspeakenglish"
android:layout_marginLeft="5dp"
android:layout_marginTop="3dp"
android:layout_marginBottom="3dp"
android:onClick="buttonTapped"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal"
android:weightSum="2"
android:padding="5dp"
>
<Button
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="welcome"
android:id="#+id/welcome"
android:layout_marginRight="5dp"
android:layout_marginTop="3dp"
android:layout_marginBottom="6dp"
android:onClick="buttonTapped"
/>
<Button
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="Hello"
android:layout_marginLeft="5dp"
android:layout_marginTop="3dp"
android:layout_marginBottom="6dp"
android:onClick="buttonTapped"
/>
</LinearLayout>
</LinearLayout>

you should fix your height and width of the button in dimension file for various resolution example:
values folder:
<dimen name="width">90dp</dimen>
<dimen name="height">75dp</dimen>
values-hdpi folder:
<dimen name="width">100dp</dimen>
<dimen name="height">85dp</dimen>
like this do for mdpi,,xhdpi,xxhdpi and put this in your button.
android:layout_width="#dimen/width"
android:layout_height="#dimen/height"

Android: GridLayout rows are all bunched together

Im making using a Grid Layout on an app. The Columns work fine but the rows are giving me a problem.
I want 4 rows spread evenly on the image I am using. But for some reason the rows are all bunched up with only the last row ahead of the others. Its my first time using a GridLayout and i cant see what im doing wrong.
<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" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".MainActivity">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/imageView"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:src="#drawable/pitch"/>
<GridLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:rowCount="4"
android:numColumns="5"
android:id="#+id/formation"
android:layout_alignBottom="#+id/imageView">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Gk"
android:layout_row="0"
android:layout_column="1"
android:layout_gravity="center"
android:id="#+id/gk"
android:layout_columnSpan="3" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="DL"
android:layout_row="1"
android:layout_column="0"
android:layout_gravity="center"
android:id="#+id/dl" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="DC"
android:layout_row="1"
android:layout_column="1"
android:layout_gravity="center"
android:id="#+id/dcl" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="DC"
android:layout_row="1"
android:layout_column="3"
android:layout_gravity="center"
android:id="#+id/dcr" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="DR"
android:layout_row="1"
android:layout_column="4"
android:layout_gravity="center"
android:id="#+id/dr" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="ML"
android:layout_row="2"
android:layout_column="0"
android:layout_gravity="center"
android:id="#+id/ml" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="MC"
android:layout_row="2"
android:layout_column="1"
android:layout_gravity="center"
android:id="#+id/mcl" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="MC"
android:layout_row="2"
android:layout_column="3"
android:layout_gravity="center"
android:id="#+id/mcr" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="MR"
android:layout_row="2"
android:layout_column="4"
android:layout_gravity="center"
android:id="#+id/mr" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="FC"
android:layout_row="3"
android:layout_column="1"
android:layout_gravity="center"
android:id="#+id/fcl" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="FC"
android:layout_row="3"
android:layout_column="3"
android:layout_gravity="center"
android:id="#+id/fcr" />
</GridLayout>

Suggest you to use linearlayout instead of gridlayout, to set image in background you need to use FrameLayout as in below code,
<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"
tools:context=".MainActivity">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/imageView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/next"
android:scaleType="centerCrop" />
</FrameLayout>
<LinearLayout
android:id="#+id/formation"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="4">
<LinearLayout
android:id="#+id/formation1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center">
<Button
android:id="#+id/gk"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:text="Gk" />
</LinearLayout>
<LinearLayout
android:id="#+id/formation2"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center">
<Button
android:id="#+id/dl"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="DL" />
<Button
android:id="#+id/dcl"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="DC" />
<Button
android:id="#+id/dcr"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="DC" />
<Button
android:id="#+id/dr"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="DR" />
</LinearLayout>
<LinearLayout
android:id="#+id/formation3"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center">
<Button
android:id="#+id/ml"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="ML" />
<Button
android:id="#+id/mcl"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="MC" />
<Button
android:id="#+id/mcr"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="MC" />
<Button
android:id="#+id/mr"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="MR" />
</LinearLayout>
<LinearLayout
android:id="#+id/formation4"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center">
<Button
android:id="#+id/fcl"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="FC" />
<Button
android:id="#+id/fcr"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="FC" />
</LinearLayout>
</LinearLayout>
</RelativeLayout>
hope this is usefull.

Consider instead using a vertical LinearLayout containing horizontal LinearLayouts (or more GridLayouts) for each row. Then each row view can have a layout_weight set to the same value so they are all allocated the same amount of space. In that case also set their layout_height to 0.

You can add:
android:layout_columnWeight="1"
android:layout_rowWeight="1"
in each Button. Like this:
<GridLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:rowCount="4"
android:numColumns="5"
android:id="#+id/formation"
android:layout_alignBottom="#+id/imageView">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Gk"
android:layout_row="0"
android:layout_column="1"
android:layout_gravity="center"
android:id="#+id/gk"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:layout_columnSpan="3" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="DL"
android:layout_row="1"
android:layout_column="0"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:layout_gravity="center"
android:id="#+id/dl" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="DC"
android:layout_row="1"
android:layout_column="1"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:layout_gravity="center"
android:id="#+id/dcl" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="DC"
android:layout_row="1"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:layout_column="3"
android:layout_gravity="centerl"
android:id="#+id/dcr" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="DR"
android:layout_row="1"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:layout_column="4"
android:layout_gravity="center"
android:id="#+id/dr" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="ML"
android:layout_row="2"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:layout_column="0"
android:layout_gravity="center"
android:id="#+id/ml" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="MC"
android:layout_row="2"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:layout_column="1"
android:layout_gravity="center"
android:id="#+id/mcl" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="MC"
android:layout_row="2"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:layout_column="3"
android:layout_gravity="center"
android:id="#+id/mcr" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="MR"
android:layout_row="2"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:layout_column="4"
android:layout_gravity="center"
android:id="#+id/mr" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="FC"
android:layout_row="3"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:layout_column="1"
android:layout_gravity="center"
android:id="#+id/fcl" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="FC"
android:layout_row="3"
android:layout_columnWeight="1"
android:layout_rowWeight="1"
android:layout_column="3"
android:layout_gravity="center"
android:id="#+id/fcr" />
</GridLayout>