I have created an activity which is having multiple Buttons. With in the Button i used images as Background. While running the app is not working and it is showing an outOfMemory Error of Bitmap. How to solve this. please help me.
enter code here
 <?xml version="1.0" encoding="utf-8"?>
 <android.support.constraint.ConstraintLayout  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:background="#eaeaea"
tools:context="com.example.softtech.btngrid.MainActivity">
<Button
    android:id="@+id/btn_item1"
    android:layout_width="155dp"
    android:layout_height="225dp"
    android:layout_marginEnd="24dp"
    android:layout_marginTop="16dp"
    android:background="@drawable/cartoon2"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@+id/btn_item2"
    app:layout_constraintTop_toTopOf="parent"
    android:layout_marginRight="24dp" />
<Button
    android:id="@+id/btn_item2"
    android:layout_width="155dp"
    android:layout_height="225dp"
    android:layout_marginEnd="24dp"
    android:layout_marginStart="24dp"
    android:layout_marginTop="16dp"
    android:background="@drawable/cartoon1"
    app:layout_constraintEnd_toStartOf="@+id/btn_item1"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />
<Button
    android:id="@+id/btn_item4"
    android:layout_width="155dp"
    android:layout_height="225dp"
    android:layout_marginEnd="24dp"
    android:layout_marginTop="257dp"
    android:background="@drawable/cartoon4"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@+id/btn_item3"
    app:layout_constraintTop_toTopOf="parent"
    android:layout_marginRight="24dp" />
<Button
    android:id="@+id/btn_item3"
    android:layout_width="155dp"
    android:layout_height="225dp"
    android:layout_marginEnd="24dp"
    android:layout_marginStart="24dp"
    android:layout_marginTop="257dp"
    android:background="@drawable/cartoon3"
    app:layout_constraintEnd_toStartOf="@+id/btn_item4"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />
<Button
    android:id="@+id/btn_item6"
    android:layout_width="155dp"
    android:layout_height="225dp"
    android:layout_marginEnd="24dp"
    android:layout_marginTop="498dp"
    android:background="@drawable/cartoon6"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@+id/btn_item5"
    app:layout_constraintTop_toTopOf="parent"
    android:layout_marginRight="24dp" />
<Button
    android:id="@+id/btn_item5"
    android:layout_width="155dp"
    android:layout_height="225dp"
    android:layout_marginEnd="24dp"
    android:layout_marginStart="24dp"
    android:layout_marginTop="498dp"
    android:background="@drawable/cartoon5"
    app:layout_constraintEnd_toStartOf="@+id/btn_item6"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />
<Button
    android:id="@+id/btn_item8"
    android:layout_width="155dp"
    android:layout_height="225dp"
    android:layout_marginEnd="24dp"
    android:layout_marginTop="739dp"
    android:background="@drawable/cartoon8"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@+id/btn_item7"
    app:layout_constraintTop_toTopOf="parent"
    android:layout_marginRight="24dp" />
<Button
    android:id="@+id/btn_item7"
    android:layout_width="155dp"
    android:layout_height="225dp"
    android:layout_marginEnd="24dp"
    android:layout_marginStart="24dp"
    android:layout_marginTop="739dp"
    android:background="@drawable/cartoon7"
    app:layout_constraintEnd_toStartOf="@+id/btn_item8"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />
<Button
    android:id="@+id/btn_item10"
    android:layout_width="155dp"
    android:layout_height="225dp"
    android:layout_marginEnd="24dp"
    android:layout_marginTop="980dp"
    android:background="@drawable/cartoon10"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@+id/btn_item9"
    app:layout_constraintTop_toTopOf="parent"
    android:layout_marginRight="24dp" />
<Button
    android:id="@+id/btn_item9"
    android:layout_width="155dp"
    android:layout_height="225dp"
    android:layout_marginEnd="24dp"
    android:layout_marginStart="24dp"
    android:layout_marginTop="980dp"
    android:background="@drawable/cartoon9"
    app:layout_constraintEnd_toStartOf="@+id/btn_item10"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />
I have declared the Buttons in Main activity.
Please Help me with this problem. I am new to android development.
 
     
     
    