B4A Library AHSwipeToRefresh - Wrapper for Android SwipeToRefresh implementation

corwin42 · Mar 28, 2014

With the v19.1 version of the Android support library Google added a SwipeToRefresh view to the android system. This is usable with API version 4 and up but it needs the android-support-v4.jar library.

Google uses two different implementations of the SwipeToRefresh usepattern in their own apps. This one is similar to the "Google Now" implementation. Nearly all other Google apps use another (in my opinion slightly nicer) solution but the Google Now version is, what made it into the official Android SDK.

Usage:
Add the AHSwipeToRefresh Object to the activity. This can be done manually or with the designer as a custom view.
Then you have to add a view to the AHSwipeToRefresh object which then can be pulled to start the refresh process. You can only add one single view to the AHSwipeToRefresh object. This should be something like a ListView or ScrollView.
When the user starts a refresh process the "Refresh" event is fired where you can start your refresh process (like loading some data over the net). When the refresh process is complete just set the Refresh property to false to stop the animation.

Installation:
Copy the AHSwipeToRefresh.jar and AHSwipeToRefresh.xml files to your custom libraries folder.

Additionally you will need the android-support-v4.jar. Check with the Android SDK Manager if you have the latest Android Support Library (You will need at least v22) installed. You can find the library in the <SDK_HOME>\extras\android\support\v4 folder. Copy the library to your custom libraries folder.

History:
V1.00
- Initial version

V1.10
- Requires Support Library v22 or up
- Fixed problems with UltimateListView (hopefully, simple example provided)
- Added ability to change background color of the progress indicator
- Added ability to set any number of colors for the progress indicator
- Supports a larger progress indicator
- New event (STR_CanChildScrollUp) to determine when a swipe event should be triggered or not.
- Support for multiple views (See example)
- Added method to set the offset (position) of the progress indicator

Scunkaneli · Mar 25, 2015

I tested it with your example and and my app and custom colors

Auf Deutsch: egal ob ich meine App probiere oder dein Beispiel von oben, die Farben ändern sich nicht, soweit ich das gesehen habe, haben sich ein paar Methoden in der "SwipeRefreshLayout" Class geändert, mit der "alten" Support Library hat alles funktioniert

Android 5.1 and CyanogenMod

corwin42 · Apr 21, 2015

Sorry that my answer took so long. You are right. Unfortunately the old version of the SwipeRefreshLayout in the support library did not have methods to set the colors directly but only with colors defined in resources. So I had to use reflection to implement a "hack" that it is possible with B4A to change the colors. Now Google has fixed this problem and provided new methods for setting colors directly.

I just worked on an update and I think I have a new version ready for release. This version will have some nice improvements and should be compatible with ULV (at least with simple lists. Don't know if the advanced swipe gestures of ULV still work but they should). Needs some additional testing but looks quite good at the moment.

corwin42 · Apr 22, 2015

Updated to version 1.10 in the first post. See there for changes.

Reids · Apr 23, 2015

Hey something went wrong with

STR.SetColorScheme()
STR.SetColorScheme2()

it say

java.lang.NoSuchMethodError: de.amberhome.strefresh.base.CustomSwipeRefreshLayout.setColorSchemeColors

removing those line will fix it, but the loader doesn't have any color

corwin42 · Apr 23, 2015

Reids said:
it say

java.lang.NoSuchMethodError: de.amberhome.strefresh.base.CustomSwipeRefreshLayout.setColorSchemeColors

Update your android-support-v4.jar.

See release notes. You need at least v22.

Reids · Apr 24, 2015

Cool problem solved, It require android-support-v4.jar placed in library folder too not just copy-ing v4 folder to library folder
thank you very much!

corwin42 · Apr 24, 2015

Added a new example "ViewPagerSwipeToRefreshExample" to the first post.

The example shows the usage of the CanChildScrollUp event. It has a Viewpager (AHViewPager library needed) with four pages and a ListView on each page.
All four ListViews can trigger a single SwipeToRefresh object. The logic, when to trigger the refresh and when not is done in the CanChildScrollUp event.

Scunkaneli · Apr 28, 2015

v1.1 works well, Thanks

fash866 · Sep 15, 2015

It's can't be used for webview?

corwin42 · Sep 15, 2015

fash866 said:
It's can't be used for webview?

You can use it for WebView, if you use the CanChildScrollUp event. See ViewPagerSwipeToRefreshExample how to use it.

fash866 · Sep 15, 2015

corwin42 said:
You can use it for WebView, if you use the CanChildScrollUp event. See ViewPagerSwipeToRefreshExample how to use it.

OK，thanks！

frenkipi · Jul 15, 2016

Hello, I have an infinite scroll with pulltorefresh wich is containing customlistview, but now my method for when I'm on the end of scroll doesn't work.

Any sugestions?

Regards!

palmzac · Jul 22, 2016

Would you give me a Webview example ? Thank you !

Alberto Iglesias · Oct 14, 2016

Hello corwin42 I trying your library and get this error:

B4A line: 35
Activity.AddView(STR, 0, 0, 100%x, 100%y)
javac 1.8.0_73
src\de\amberhome\swipetorefreshulv\main.java:337: error: cannot access SwipeRefreshLayout
mostCurrent._activity.AddView((android.view.View)(mostCurrent._str.getObject()),(int) (0),(int) (0),anywheresoftware.b4a.keywords.Common.PerXToCurrent((float) (100),mostCurrent.activityBA),anywheresoftware.b4a.keywords.Common.PerYToCurrent((float) (100),mostCurrent.activityBA));
^
class file for android.support.v4.widget.SwipeRefreshLayout not found
1 error

I compiling with C:\Android\platforms\android-22\android.jar and C:\Program Files\Java\jdk1.8.0_73

fbritop · Apr 28, 2017

Great library, but can this Lib be used with another types of views, for example a Custom List View or a Panel?

When I tried it outputs an error of:
java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.

peacemaker · Jun 19, 2017

The lib is working with WebView, but
1) not all links
2) and only under old Android versions, 4.4 works, but 5.0, 6.0 - not.

If "STR_CanChildScrollUp As Boolean" exists - only this is fired.
If no - "STR_Refresh" is fired, but under Android 5+ - the webview is blank. But in the default browsser, Chrome browser and just Webview (without adding it to a STR object) the ULR is opened OK.
So, no idea why not all ULRs are visible, but i have to stop using the lib as users complain.

B4X:

Sub STR_Refresh
    'Disable the STR object so we can not start a new refresh process
STR.Refreshing = True
STR.Enabled = False
    wv.StopLoading
    wv.LoadUrl(LastURL)
End Sub

eps · Jul 19, 2017

I'm trying to use the ViewPagerSwipeToRefresh example, but it doesn't seem to want to display anything for me... It's carried out all the processing but doesn't display the Page Content. I had to change this line

B4X:

VP.Initialize(PC,"")

to

VP.Initialize("PC")

but apart from that I've left it unchanged.

I've updated the android-support-v4.jar to v22.2.1 version as well...

Any thoughts? I'm using BA 6.80 and Android 7.0 on an HTC 10..

It's probably something I haven't set up correctly.

DonManfred · Jul 19, 2017

using android-support-v4.jar in b4a 6.8 is, i think, the wrong solution.

You should remove it and add a reference to the google maven repo

start a new thread if you want to know more.

eps · Jul 19, 2017

DonManfred said:
using android-support-v4.jar in b4a 6.8 is, i think, the wrong solution.

You should remove it and add a reference to the google maven repo

start a new thread if you want to know more.

I thought so as well - but it doesn't work without it either

Basically the example doesn't work and I can't work out why.

rscheel · Jul 19, 2017

eps said:
I thought so as well - but it doesn't work without it either

Basically the example doesn't work and I can't work out why.

I have created a small project that I have shared in the forum in Spanish, maybe it will be useful.

https://www.b4x.com/android/forum/t...stomlistview-cardview-ahswipetorefresh.81739/

B4A Library AHSwipeToRefresh - Wrapper for Android SwipeToRefresh implementation

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