How to add Scroll Bar to LinearLayout?

Question

I am new to the Android app development.

Now I am designing an app, in that I have an Activity which is containing some content. When the user change orientation to horizontal view, some content hide away (go out of screen). So to make then visible I want to add a scroll bar to my app.

Here is the code for my activity:

<?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:layout_marginTop="16dp"
    android:layout_marginLeft="16dp"
    tools:context="com.example.nitin.justjava.MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="16dp"
        android:text="Toppings"
        android:textAllCaps="true"/>

    <CheckBox
        android:id="@+id/whipped_cream_checkbox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Whipped cream"
        android:textSize="16sp"
        android:paddingLeft="24dp"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="QUANTITY"
        android:textAllCaps="true"
        android:layout_marginBottom="16dp"
        android:layout_marginTop="16dp"/>

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <Button
            android:id="@+id/b"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:text="-"
            android:onClick="decrement"
            android:layout_marginRight="8dp"/>
        <TextView
            android:id="@+id/quantity_text_view"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="0"
            android:textSize="16sp"
            android:textColor="#000000"
            />
        <Button
            android:id="@+id/a"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:text="+"
            android:onClick="increment"
            android:layout_marginLeft="8dp"/>
    </LinearLayout>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Order Summary"
        android:textAllCaps="true"
        android:layout_marginBottom="16dp"
        android:layout_marginTop="16dp"/>
    <TextView
        android:id="@+id/order_summary_text_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Rs. 0"
        android:textSize="16sp"
        android:textColor="#000000"
        />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Order"
        android:layout_marginTop="16dp"
        android:onClick="submitOrder"/>

</LinearLayout>

Thanks

Answer 1

You should wrap your root layout with ScollView container: https://developer.android.com/reference/android/widget/ScrollView.html