GridLayout not working

Question

I created a GridLayout and CardView, but card view not working I am using Android Studio 3.0.1

When I look in the Design View, everything looks right. But when I look up the run, I do not see the card on it. Showing text and background only on that. Please help me I am facing troubles with the layout when i launch it on device with android version 5.1 Lolipop. please assist, it does not display a the cards views

android version 5.1 Lolipop

Design View

Build Gradle

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@drawable/backpic"
    android:weightSum="10"
    tools:context="myapplication.cardview.MainActivity">

    <RelativeLayout
        android:layout_weight="2"
        android:layout_width="match_parent"
        android:layout_height="0dp">

        <TextView
            android:id="@+id/textGrid"
            android:text="Card View"
            android:textSize="34sp"
            android:textColor="@android:color/black"
            android:textStyle="bold"
            android:layout_centerInParent="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </RelativeLayout>



    <GridLayout
        android:columnCount="2"
        android:rowCount="3"
        android:alignmentMode="alignMargins"
        android:columnOrderPreserved="false"
        android:layout_weight="8"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:padding="14dp">

        <!-- Row 1 -->
        <!-- Column 1 -->
        <android.support.v7.widget.CardView
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_columnWeight="1"
            android:layout_rowWeight="1"
            android:layout_marginBottom="16dp"
            android:layout_marginLeft="16dp"
            android:layout_marginRight="16dp"
            app:cardElevation="8dp"
            app:cardCornerRadius="8dp"
            >

            <LinearLayout
                android:layout_gravity="center_horizontal|center_vertical"
                android:layout_margin="16dp"
                android:orientation="vertical"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content">

                <ImageView
                    android:src="@drawable/pi"
                    android:layout_gravity="center_horizontal"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

                <TextView
                    android:text="Card"
                    android:textAlignment="center"
                    android:textColor="@android:color/black"
                    android:textSize="18sp"
                    android:textStyle="bold"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

            </LinearLayout>

        </android.support.v7.widget.CardView>
        <!-- Column 2 -->
        <android.support.v7.widget.CardView
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_columnWeight="1"
            android:layout_rowWeight="1"
            android:layout_marginBottom="16dp"
            android:layout_marginLeft="16dp"
            android:layout_marginRight="16dp"
            app:cardElevation="8dp"
            app:cardCornerRadius="8dp"
            >

            <LinearLayout
                android:layout_gravity="center_horizontal|center_vertical"
                android:layout_margin="16dp"
                android:orientation="vertical"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content">

                <ImageView
                    android:src="@drawable/pi"
                    android:layout_gravity="center_horizontal"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

                <TextView
                    android:text="Card"
                    android:textAlignment="center"
                    android:textColor="@android:color/black"
                    android:textSize="18sp"
                    android:textStyle="bold"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

            </LinearLayout>

        </android.support.v7.widget.CardView>

        <!-- Row 2 -->
        <!-- Column 1 -->
        <android.support.v7.widget.CardView
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_columnWeight="1"
            android:layout_rowWeight="1"
            android:layout_marginBottom="16dp"
            android:layout_marginLeft="16dp"
            android:layout_marginRight="16dp"
            app:cardElevation="8dp"
            app:cardCornerRadius="8dp"
            >

            <LinearLayout
                android:layout_gravity="center_horizontal|center_vertical"
                android:layout_margin="16dp"
                android:orientation="vertical"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content">

                <ImageView
                    android:src="@drawable/pi"
                    android:layout_gravity="center_horizontal"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

                <TextView
                    android:text="Card"
                    android:textAlignment="center"
                    android:textColor="@android:color/black"
                    android:textSize="18sp"
                    android:textStyle="bold"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

            </LinearLayout>

        </android.support.v7.widget.CardView>
        <!-- Column 2 -->
        <android.support.v7.widget.CardView
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_columnWeight="1"
            android:layout_rowWeight="1"
            android:layout_marginBottom="16dp"
            android:layout_marginLeft="16dp"
            android:layout_marginRight="16dp"
            app:cardElevation="8dp"
            app:cardCornerRadius="8dp"
            >

            <LinearLayout
                android:layout_gravity="center_horizontal|center_vertical"
                android:layout_margin="16dp"
                android:orientation="vertical"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content">

                <ImageView
                    android:src="@drawable/pi"
                    android:layout_gravity="center_horizontal"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

                <TextView
                    android:text="Card"
                    android:textAlignment="center"
                    android:textColor="@android:color/black"
                    android:textSize="18sp"
                    android:textStyle="bold"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

            </LinearLayout>

        </android.support.v7.widget.CardView>

        <!-- Row 3 -->
        <!-- Column 1 -->
        <android.support.v7.widget.CardView
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_columnWeight="1"
            android:layout_rowWeight="1"
            android:layout_marginBottom="16dp"
            android:layout_marginLeft="16dp"
            android:layout_marginRight="16dp"
            app:cardElevation="8dp"
            app:cardCornerRadius="8dp"
            >

            <LinearLayout
                android:layout_gravity="center_horizontal|center_vertical"
                android:layout_margin="16dp"
                android:orientation="vertical"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content">

                <ImageView
                    android:src="@drawable/pi"
                    android:layout_gravity="center_horizontal"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

                <TextView
                    android:text="Card"
                    android:textAlignment="center"
                    android:textColor="@android:color/black"
                    android:textSize="18sp"
                    android:textStyle="bold"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

            </LinearLayout>

        </android.support.v7.widget.CardView>
        <!-- Column 2 -->
        <android.support.v7.widget.CardView
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_columnWeight="1"
            android:layout_rowWeight="1"
            android:layout_marginBottom="16dp"
            android:layout_marginLeft="16dp"
            android:layout_marginRight="16dp"
            app:cardElevation="8dp"
            app:cardCornerRadius="8dp"
            >

            <LinearLayout
                android:layout_gravity="center_horizontal|center_vertical"
                android:layout_margin="16dp"
                android:orientation="vertical"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content">

                <ImageView
                    android:src="@drawable/pi"
                    android:layout_gravity="center_horizontal"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

                <TextView
                    android:text="Card"
                    android:textAlignment="center"
                    android:textColor="@android:color/black"
                    android:textSize="18sp"
                    android:textStyle="bold"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

            </LinearLayout>

        </android.support.v7.widget.CardView>

    </GridLayout>


</LinearLayout>

Answer 1

I had the same issue with Lollipop devices although Oreo devices worked fine. We have to use support library instead of default one.

Here is the fix:

in build.gradle

androidx
implementation 'androidx.gridlayout:gridlayout:1.0.0'
or
implementation 'com.android.support:gridlayout-v7:28+'

 <androidx.gridlayout.widget.GridLayout
                    android:paddingBottom="15dp"
                    android:paddingTop="15dp"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    app:columnCount="3"
                    app:rowCount="3">

                <ImageView                            
                        android:layout_width="0dp"
                        android:layout_height="50dp"
                        app:layout_columnWeight="1"
                        android:padding="10dp"
                        android:tint="@color/colorPrimary"
                        app:srcCompat="@drawable/ic_tools"/>

  ...

 </androidx.gridlayout.widget.GridLayout>