Want to add a scroll view

Question

When I'm trying to add ScrollView its giving me error that Scroll view can contain only a single child. So how to add a ScrollView ? And also when I open my app in various phones all the phones gives different layouts. How do manage the look and feel of the app same for all mobile devices ?

Register.xml

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:background="#0066CC"
    android:orientation="vertical"

    android:padding="10dp" >

    <ImageView
        android:id="@+id/upImage"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:layout_weight="1" 
        android:background="#000"
        android:layout_gravity="center_horizontal"/>

    <TextView
        android:id="@+id/textView1"
        android:layout_width="465dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:gravity="center_horizontal"
        android:layout_weight="0.02"
        android:layout_marginBottom="100dp"
        android:textSize="15sp"
        android:textStyle="bold"
        android:text="Tap to upload Profile Picture" />

    <EditText
        android:id="@+id/imName"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"

     android:layout_marginBottom="50dp"
     android:hint="Enter name of the Image"
        android:ems="10" >


    </EditText>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Name" />

    <EditText
        android:id="@+id/etName"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Age" />

    <EditText
        android:id="@+id/etAge"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Username" />

    <EditText
        android:id="@+id/etUsername"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Password" />

    <EditText
        android:id="@+id/etPassword"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dp"
        android:inputType="textPassword" />

    <Button
        android:id="@+id/bRegister"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Register" />

</LinearLayout>

Answer 1

Yes ScrollView allow only single child So put you parent LinearLayout inside ScrollView like below

<ScrollView 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">

    <LinearLayout 
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#0066CC"
        android:orientation="vertical"
        android:padding="10dp" >

        <ImageView
            android:id="@+id/upImage"
            android:layout_width="300dp"
            android:layout_height="wrap_content"
            android:layout_weight="1" 
            android:background="#000"
            android:layout_gravity="center_horizontal"/>

        <TextView
            android:id="@+id/textView1"
            android:layout_width="465dp"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:gravity="center_horizontal"
            android:layout_weight="0.02"
            android:layout_marginBottom="100dp"
            android:textSize="15sp"
            android:textStyle="bold"
            android:text="Tap to upload Profile Picture" />

        <EditText
            android:id="@+id/imName"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="50dp"
            android:hint="Enter name of the Image"
            android:ems="10" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Name" />

        <EditText
            android:id="@+id/etName"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="10dp" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Age" />

        <EditText
            android:id="@+id/etAge"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="10dp" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Username" />

        <EditText
            android:id="@+id/etUsername"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="10dp" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Password" />

        <EditText
            android:id="@+id/etPassword"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="10dp"
            android:inputType="textPassword" />

        <Button
            android:id="@+id/bRegister"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Register" />

    </LinearLayout>
</ScrollView>