How to make a ProgressBar stay in the center of screen despite scrolling

Question

I have a ProgressBar in a ScrollView, and I'd like it to stay centered vertically despite the user scrolling down or up. However, I'm not sure how to accomplish this.

Here's the code that I have, simple as it is. I have an indeterminate ProgressBar:

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/ocr_scroll_view"
android:layout_width="match_parent"
android:layout_height="fill_parent">

    <RelativeLayout android:id="@+id/image_holder"
    android:layout_gravity="end"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" >

        <ImageView android:id="@+id/image"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

        <ProgressBar android:id="@+id/progressBar1"
        style="?android:attr/progressBarStyleLarge"
        android:visibility="gone"
        android:layout_centerInParent="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

And I call it as such:

    spinningProgressBar = (ProgressBar)findViewById(R.id.progressBar1);
    spinningProgressBar.setIndeterminate(true);
    spinningProgressBar.setVisibility(View.GONE);

Setting its visibility at the appropriate times.

All suggestions very much appreciated.

Booger · Answer 1 · 2015-02-05T13:30:49.147

9

You need the ScrollView to be at same level as ProgressDialog in your Layout.

Here it is in concept:

<RelativeLayout>
    <ProgressDialog>      
    <ScrollView>      
<RelativeLayout>

edited Feb 05 '15 at 13:30

answered Dec 15 '14 at 02:34

Booger

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Sorry, I have to downvote this - this won't actually work, as the progress bar has to be drawn AFTER the scrollview... – Alex K Dec 15 '14 at 03:31
Alex K - you are right, I did change the order in my answer. – Booger Feb 05 '15 at 13:31

score 7 · Accepted Answer · edited May 23 '17 at 12:20

7

Put it outside of the ScrollView. Just have the ScrollView and the ProgressBar overlap.

You can read about how to overlap views here: Overlapping Views in Android

There's a couple of ways to do it, ranging from GridLayouts to RelativeLayouts and then programatic ways to do it.

edited May 23 '17 at 12:20

Community

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answered Dec 15 '14 at 02:30

Alex K

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Great idea. However, as the ScrollView is the highest view, I'd need to create a new layout outside of it to hold the ProgressBar, wouldn't I? – mikeappell Dec 15 '14 at 02:36
OH. Yes - just put them both inside of a RelativeLayout. Then you can use `android:layout_centerInParent="true"` to make the ProgressBar be in the center of the layout. – Alex K Dec 15 '14 at 02:37
Hell yes, works like a charm. Though the ProgressBar had to come after the ScrollView in order to be visible, which I neglected in my first attempt. And then I got a strange classcast error, but rebuilding the project did the trick. Thanks! – mikeappell Dec 15 '14 at 03:08
Hopefully adding another View as a holder won't do anything significant toward Activity efficiency, shouldn't be a big deal. – mikeappell Dec 15 '14 at 03:09
@mikeappell it won't do anything. you won't notice anything from something as small as that – Alex K Dec 15 '14 at 03:32

score 2 · Answer 3 · answered Dec 10 '19 at 07:57

2

you can insert this into the scrollview tag

android:fillViewport="true"

answered Dec 10 '19 at 07:57

Emircan Pekyürek

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How to make a ProgressBar stay in the center of screen despite scrolling

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