How to always show scrollbar

问题:

The scrollbar in my scrollview is only visible when I start scrolling. How can I always show it?

回答1:

As of now the best way is to use android:fadeScrollbars="false" in xml which is equivalent to ScrollView.setScrollbarFadingEnabled(false); in java code.

回答2:

Setting the android:scrollbarFadeDuration="0" will do the trick.

回答3:

There are 2 ways:

• from Java code: ScrollView.setScrollbarFadingEnabled(false);
• from XML code: android:fadeScrollbars="false"

Simple as that!

回答4:

Try this as the above suggestions didn't work for me when I wanted to do this for a TextView:

TextView.setScrollbarFadingEnabled(false);

Good Luck.

回答5:

Try android:scrollbarAlwaysDrawVerticalTrack="true" for vertical. and Try android:scrollbarAlwaysDrawHorizontalTrack="true" for horizontal

回答6:

Since neither of the above worked for me, here's what did: android:scrollbarDefaultDelayBeforeFade="500000"

回答7:

android:scrollbarFadeDuration="0" sometimes does not work after I exit from the apps and start again. So I add gallery.setScrollbarFadingEnabled(false); to the activity and it works!

回答8:

Don't forget to add android:scrollbars="vertical" along with android:fadeScrollbars="false" or it won't show at all in some cases.

回答9:

These two together worked for me:

android:scrollbarFadeDuration="0"
android:scrollbarAlwaysDrawVerticalTrack="true"

回答10:

setVertical* helped to make vertical scrollbar always visible programmatically

scrollView.setScrollbarFadingEnabled(false);
scrollView.setVerticalScrollBarEnabled(true);
scrollView.setVerticalFadingEdgeEnabled(false);

回答11:

Style your scroll bar Visibility, Color and Thickness like this:

<ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/recycler_bg"

        <!--Show Scroll Bar-->
        android:fadeScrollbars="false"
        android:scrollbarAlwaysDrawVerticalTrack="true"
        android:scrollbarFadeDuration="50000"

        <!--Scroll Bar thickness-->
        android:scrollbarSize="4dp"

        <!--Scroll Bar Color-->
        android:scrollbarThumbVertical="@color/colorSecondaryText"/>

Hope it help save some time.

回答12:

setting the android:scrollbars="vertical" android:scrollbarAlwaysDrawVerticalTrack="true" android:fadeScrollbars="false" android:scrollbarThumbVertical="@drawable/scroll"

will do the trick change the @drwable for own style

回答13:

I had the same problem. Tthe bar had the same background color. Try:

android:scrollbarThumbVertical="@android:color/black"