CODEWITHSUNDEEP
androidtextviewscrollbar
user2474232
user2474232

Reputation: 1

basic android scroll bars not visible

<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" >


    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:text="Choose Details"
            android:id="@+id/textView"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"/>

    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:text="Year"
            android:id="@+id/textView2"
            android:layout_below="@+id/textView"
            android:layout_alignParentLeft="true"/>

    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:text="Branch"
            android:id="@+id/textView3"
            android:layout_below="@+id/textView2"
            android:layout_alignParentLeft="true"/>

    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:text="Semester"
            android:id="@+id/textView4"
            android:layout_below="@+id/textView3"
            android:layout_alignParentLeft="true"/>

    <ScrollView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/scrollView"
            android:layout_alignTop="@+id/textView2"
            android:layout_alignParentRight="true"/>

    <ScrollView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/scrollView2"
            android:layout_alignTop="@+id/textView4"
            android:layout_alignParentRight="true"/>

    <ScrollView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/scrollView3"
            android:layout_below="@+id/textView4"
            android:layout_alignRight="@+id/scrollView2"/>
</RelativeLayout>

I am bit new to android.Could anyone tel me that why arent the three scroll bars visible along the text views.I want to display the scrolls adjacent to their respective textviews.Moreover is the relative layout the best way to align the widgets .

Upvotes: 0

Views: 965

Answers (4)

Neoh
Neoh

Reputation: 16164

1) Use LinearLayout instead of RelativeLayout, set android:orientation="vertical"

2) Put the textview inside your scrollview, like this:

<ScrollView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        ...
    </TextView>
</ScrollView>

If you put all textviews inside a single scrollview, you will have one scrollbar(Note however that scrollview can only contain one child view, so you'll need to wrap those textviews under a linear layout); if you put one text view in each scrollview and stack those scrollviews vertically in linear layout, then you'll have separate scrollbar for each textview.

Upvotes: 0

Yogendra
Yogendra

Reputation: 5258

The ScrollView in your layout is not visible because your it does not contain any widget with height and width. If you want to see your ScrollView then you have to set some value to the width and height (for example android:layout_width="40dip") properties, and a backgroundColor(), after this you will able to see you ScrollView.

Upvotes: 0

Avadhani Y
Avadhani Y

Reputation: 7636

Until and unless, you add View element in ScrollView, the ScrollViews which u have added cannot be visible, but they are present in layout. ScrollView must contain a single View item either it is a LinearLayout, RelativeLayout with child views such as TextView, ImageView, EditText, Button as below:

<ScrollView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/scrollView2"
        android:layout_alignTop="@+id/textView4"
        android:layout_alignParentRight="true">
        <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

        <ImageView
            android:id="@+id/image1"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp" />
    </LinearLayout>
    </ScrollView>

or a View element as a single child for ScrollView as below:

  <ScrollView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/scrollView2"
        android:layout_alignTop="@+id/textView4"
        android:layout_alignParentRight="true">
        <ImageView
            android:id="@+id/image1"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"/>
    </LinearLayout>
    </ScrollView>

Upvotes: 1

drarkayl
drarkayl

Reputation: 1017

A scroll view is not a scroll bar.

It must contain some elements.

Example : 

    <ScrollView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_below="@+id/imageView1" >

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical" >

            <Button
                android:id="@+id/button1"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:text="Button" />

            <Button
                android:id="@+id/button2"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:text="Button" />

            <Button
                android:id="@+id/button3"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:text="Button" />
 </LinearLayout>
    </ScrollView>

Your code should be 

<ScrollView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        >
  <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:text="Choose Details"
            android:id="@+id/textView"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"/>

    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:text="Year"
            android:id="@+id/textView2"
            android:layout_below="@+id/textView"
            android:layout_alignParentLeft="true"/>

    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:text="Branch"
            android:id="@+id/textView3"
            android:layout_below="@+id/textView2"
            android:layout_alignParentLeft="true"/>

    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:text="Semester"
            android:id="@+id/textView4"
            android:layout_below="@+id/textView3"
            android:layout_alignParentLeft="true"/>

    <ScrollView/>

Upvotes: 0

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