# Scrolling using UiScrollable stops in the middle of the screen

**URL:** <https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709>\
**Category:** Tutorials/Documentation\
**Created:** [August 25, 2020, 1:24pm UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709 "2020-08-25T13:24:06Z")\
**Posts on this page:** 14\
**Page:** 1

<div class="post-metadata">

**Author:** ![mehedihasan619](https://discuss.appium.io/user_avatar/discuss.appium.io/mehedihasan619/32/7945_2.png) [@mehedihasan619](https://discuss.appium.io/u/mehedihasan619)\
**Post date:** [August 25, 2020, 1:24pm UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709/1 "2020-08-25T13:24:06Z")

</div>

I am trying to scroll down to the bottom of the screen to a UI block using `UiSelector` class but it’s not working as expected. Basically, when I run the code it does not scroll all the way to the bottom rather it the first pulls (sort pull to refresh) and then starts scrolling but stops in the middle of the screen and then it goes back and forth and at some point it fails with an exception `NoSuchElementException`(attached a screen recording).  
Below is the code I used:

```
myDriver.findElement(MobileBy.AndroidUIAutomator("new UiScrollable("
				+ "new UiSelector().description(\"scrollview_train_tab\")).scrollIntoView("                      
				+ "new UiSelector().textMatches(\"Games\"));"));

```

Here, `myDriver` is an instance of `AndroidDriver`.  
Please note that the app does not have resourceId so I am using content-desc to identify UI objects.

I have tried with the followings methods in `UiSelector` class: `text(), textContains(),description(), textMatches()` but no luck. All of these are resulting in the same behaviour.

[Please check this screen recording](https://www.loom.com/share/5ded5ef433214423817065ded0512db4)

Appium Client/Version: Java/7.3.0   
  
Appium Server: 1.18.0-1 (Desktop version)   
  
Executed on Android Emulator with Android 8   
  
OS: Windows 10

Can anybody help? Thanks in advance.

---

<div class="post-metadata">

**Author:** ![mehedihasan619](https://discuss.appium.io/user_avatar/discuss.appium.io/mehedihasan619/32/7945_2.png) [@mehedihasan619](https://discuss.appium.io/u/mehedihasan619)\
**Post date:** [August 25, 2020, 1:31pm UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709/2 "2020-08-25T13:31:38Z")

</div>

@Aleksei hoping you can help me out.

---

<div class="post-metadata">

**Author:** ![Aleksei](https://discuss.appium.io/user_avatar/discuss.appium.io/aleksei/32/6267_2.png) [@Aleksei](https://discuss.appium.io/u/Aleksei)\
**Post date:** [August 25, 2020, 4:56pm UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709/3 "2020-08-25T16:56:08Z")

</div>

try to increase number of swipes first (setMaxSearchSwipes). also visit guide which should help in many cases -\> [http://appium.io/docs/en/writing-running-appium/tutorial/swipe-tutorial/](http://appium.io/docs/en/writing-running-appium/tutorial/swipe-tutorial/)

---

<div class="post-metadata">

**Author:** ![mehedihasan619](https://discuss.appium.io/user_avatar/discuss.appium.io/mehedihasan619/32/7945_2.png) [@mehedihasan619](https://discuss.appium.io/u/mehedihasan619)\
**Post date:** [August 25, 2020, 7:13pm UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709/4 "2020-08-25T19:13:51Z")

</div>

Thank you for the replay. Really appreciate this.  
I already tried a solution with `setMaxSearchSwipes` but no luck. Besides, I also tried all the solution from [http://appium.io/docs/en/writing-running-appium/tutorial/swipe-tutorial/](http://appium.io/docs/en/writing-running-appium/tutorial/swipe-tutorial/)

Code snippet used:  
`driver.findElement(MobileBy.AndroidUIAutomator( "new UiScrollable(new UiSelector().description(\"content-desc\")).setMaxSearchSwipes(10)" + ".scrollIntoView(new UiSelector().text(\"text_to_match\"))"));`

Could there be an issue with the layout? Below is the inspected layout of the screen.

 ![Screenshot_2](https://discuss.appium.io/uploads/default/original/2X/0/0d46ef1c85d183965d9d28f19de461db5bccd17d.png)

---

<div class="post-metadata">

**Author:** ![Aleksei](https://discuss.appium.io/user_avatar/discuss.appium.io/aleksei/32/6267_2.png) [@Aleksei](https://discuss.appium.io/u/Aleksei)\
**Post date:** [August 25, 2020, 7:53pm UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709/5 "2020-08-25T19:53:28Z")

</div>

pls attach result of:  
`System.out.println(driver.getPageSource())`  
on this screen as file

---

<div class="post-metadata">

**Author:** ![mehedihasan619](https://discuss.appium.io/user_avatar/discuss.appium.io/mehedihasan619/32/7945_2.png) [@mehedihasan619](https://discuss.appium.io/u/mehedihasan619)\
**Post date:** [August 26, 2020, 6:25am UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709/6 "2020-08-26T06:25:09Z")

</div>

Here is the page source:  
[pageSource.log](https://discuss.appium.io/uploads/short-url/7JiDo1xEVJizOdWcU9U85P2r88R.log) (19.5 KB)

---

<div class="post-metadata">

**Author:** ![Aleksei](https://discuss.appium.io/user_avatar/discuss.appium.io/aleksei/32/6267_2.png) [@Aleksei](https://discuss.appium.io/u/Aleksei)\
**Post date:** [August 26, 2020, 8:30am UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709/7 "2020-08-26T08:30:13Z")

</div>

try:

```auto
// 1
driver.findElement(MobileBy.AndroidUIAutomator(
                    "new UiScrollable(new UiSelector().scrollable(true).instance(0))" +
                            ".scrollIntoView(new UiSelector()" +
                            ".textMatches(\"" + elementText + "\").instance(0))"));

// 2
driver.findElement(MobileBy.AndroidUIAutomator(
                    "new UiScrollable(new UiSelector().scrollable(true).description(\"content-desc\"))" +
                            ".scrollIntoView(new UiSelector()" +
                            ".textMatches(\"" + elementText + "\").instance(0))"));

// 3
driver.findElement(MobileBy.AndroidUIAutomator(
                    "new UiScrollable(new UiSelector().scrollable(true).instance(0))" +
                            ".setSwipeDeadZonePercentage(50).scrollIntoView(new UiSelector()" +
                            ".textMatches(\"" + elementText + "\").instance(0))"));
// 4 final solution when nothing helps -> switch to:
// scrollForward (moves exactly one view)
try {
    driver.findElement(MobileBy.AndroidUIAutomator(
            "new UiScrollable(new UiSelector().scrollable(true)).scrollForward()"));
} catch (InvalidSelectorException e) {
    // ignore
}
// and quickly check text needed appeared
// repeat scrollForward + text check in loop with some limit e.g. 10 tries.

```

---

<div class="post-metadata">

**Author:** ![mehedihasan619](https://discuss.appium.io/user_avatar/discuss.appium.io/mehedihasan619/32/7945_2.png) [@mehedihasan619](https://discuss.appium.io/u/mehedihasan619)\
**Post date:** [August 26, 2020, 12:35pm UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709/8 "2020-08-26T12:35:28Z")

</div>

Thank you. I really appreciate your help. The first 3 didn’t help. 4th solution didn’t work as well. However, I made a little adjustment then it worked.  
Here is working code snippet:  
Scroll down:  
`driver.findElement(MobileBy.AndroidUIAutomator("new UiScrollable(new UiSelector().description(\""+parentScrollViewId+"\")).scrollForward()"));`

Scroll up:  
`driver.findElement(MobileBy.AndroidUIAutomator("new UiScrollable(new UiSelector().description(\""+parentScrollViewId+"\")).scrollBackward()"));`

---

<div class="post-metadata">

**Author:** ![Aleksei](https://discuss.appium.io/user_avatar/discuss.appium.io/aleksei/32/6267_2.png) [@Aleksei](https://discuss.appium.io/u/Aleksei)\
**Post date:** [August 26, 2020, 2:07pm UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709/9 "2020-08-26T14:07:54Z")

</div>

Your adjustment is correct. I just copied code like basic idea. Good. Try same adjustment with 1 2 and 3

---

<div class="post-metadata">

**Author:** ![mehedihasan619](https://discuss.appium.io/user_avatar/discuss.appium.io/mehedihasan619/32/7945_2.png) [@mehedihasan619](https://discuss.appium.io/u/mehedihasan619)\
**Post date:** [August 27, 2020, 9:46am UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709/10 "2020-08-27T09:46:56Z")

</div>

@Aleksei I tried but none of them work.  
So tried the below code to scroll until the element is displayed but it throws error after scrolling once. The script works on emulator (OS -7) but fails on real android device with OS version 7 but work on real device with android 10.

```
		boolean elementFound = false;
	while(elementFound==false) {
		try {
			if(mobEl.isDisplayed()==true) {
				break;
			}
		}catch(Exception e) {
			elementFound=false;
		}
		waitForEvent(2);
		driver.findElement(MobileBy.AndroidUIAutomator("new UiScrollable(new UiSelector().description(\"scrollview_learn_tab\")).scrollForward()"));
	}

```

> **Here is the error log**
>
> 09:39:02:159 - [HTTP] --\> POST /wd/hub/session/2f8f63ae-25d6-4a00-946e-20c7fc19600a/element  
> 2020-08-27 09:39:02:159 - [HTTP] {“using”:"-android uiautomator",“value”:“new UiScrollable(new UiSelector().description(“scrollview\_learn\_tab”)).scrollForward()”}  
> 2020-08-27 09:39:02:160 - [debug] [W3C (2f8f63ae)] Calling AppiumDriver.findElement() with args: ["-android uiautomator",“new UiScrollable(new UiSelector().description(“scrollview\_learn\_tab”)).scrollForward()”,“2f8f63ae-25d6-4a00-946e-20c7fc19600a”]  
> 2020-08-27 09:39:02:160 - [debug] [BaseDriver] Valid locator strategies for this request: xpath, id, class name, accessibility id, -android uiautomator  
> 2020-08-27 09:39:02:160 - [debug] [BaseDriver] Waiting up to 5000 ms for condition  
> 2020-08-27 09:39:02:161 - [debug] [WD Proxy] Matched ‘/element’ to command name ‘findElement’  
> 2020-08-27 09:39:02:162 - [debug] [WD Proxy] Proxying [POST /element] to [POST [http://127.0.0.1:8200/wd/hub/session/8f1b5e7b-396a-4567-94c0-6d3a99b85ed1/element](http://127.0.0.1:8200/wd/hub/session/8f1b5e7b-396a-4567-94c0-6d3a99b85ed1/element)] with body: {“strategy”:"-android uiautomator",“selector”:“new UiScrollable(new UiSelector().description(“scrollview\_learn\_tab”)).scrollForward()”,“context”:"",“multiple”:false}  
> 2020-08-27 09:39:03:445 - [WD Proxy] Got an unexpected response with status 400: {“sessionId”:“8f1b5e7b-396a-4567-94c0-6d3a99b85ed1”,“value”:{“error”:“invalid selector”,“message”:“Could not parse expression `new UiScrollable(new UiSelector().description(\"scrollview_learn_tab\")).scrollForward()`: Last method called on a UiScrollable object must return a UiObject object”,“stacktrace”:"io.appium.uiautomator2.common.exceptions.UiSelectorSyntaxException: Could not parse expression `new UiScrollable(new UiSelector().description(\"scrollview_learn_tab\")).scrollForward()`: Last method called on a UiScrollable object must return a UiObject object\n\tat io.appium.uiautomator2.utils.UiScrollableParser.parse(UiScrollableParser.java:71)\n\tat io.appium.uiautomator2.utils.UiAutomatorParser.consumeStatement(UiAutomatorParser.java:92)\n\tat io.appium.uiautomator2.utils.UiAutomatorParser.parse(UiAutomatorParser.java:48)\n\tat io.appium.uiautomator2.utils.ElementLocationHelpers.toSelectors(ElementLocationHelpers.java:98)\n\tat io.appium.uiautomator2.utils.ElementLocationHelpers.toSelector(ElementLoca…  
> 2020-08-27 09:39:03:446 - [debug] [W3C] Matched W3C error code ‘invalid selector’ to InvalidSelectorError  
> 2020-08-27 09:39:03:492 - [debug] [W3C (2f8f63ae)] Encountered internal error running command: io.appium.uiautomator2.common.exceptions.UiSelectorSyntaxException: Could not parse expression `new UiScrollable(new UiSelector().description("scrollview_learn_tab")).scrollForward()`: Last method called on a UiScrollable object must return a UiObject object  
> 2020-08-27 09:39:03:492 - [debug] [W3C (2f8f63ae)] at io.appium.uiautomator2.utils.UiScrollableParser.parse(UiScrollableParser.java:71)  
> 2020-08-27 09:39:03:493 - [debug] [W3C (2f8f63ae)] at io.appium.uiautomator2.utils.UiAutomatorParser.consumeStatement(UiAutomatorParser.java:92)  
> 2020-08-27 09:39:03:493 - [debug] [W3C (2f8f63ae)] at io.appium.uiautomator2.utils.UiAutomatorParser.parse(UiAutomatorParser.java:48)  
> 2020-08-27 09:39:03:493 - [debug] [W3C (2f8f63ae)] at io.appium.uiautomator2.utils.ElementLocationHelpers.toSelectors(ElementLocationHelpers.java:98)  
> 2020-08-27 09:39:03:493 - [debug] [W3C (2f8f63ae)] at io.appium.uiautomator2.utils.ElementLocationHelpers.toSelector(ElementLocationHelpers.java:92)  
> 2020-08-27 09:39:03:493 - [debug] [W3C (2f8f63ae)] at io.appium.uiautomator2.handler.FindElement.findElement(FindElement.java:106)  
> 2020-08-27 09:39:03:493 - [debug] [W3C (2f8f63ae)] at io.appium.uiautomator2.handler.FindElement.safeHandle(FindElement.java:72)  
> 2020-08-27 09:39:03:493 - [debug] [W3C (2f8f63ae)] at io.appium.uiautomator2.handler.request.SafeRequestHandler.handle(SafeRequestHandler.java:38)  
> 2020-08-27 09:39:03:493 - [debug] [W3C (2f8f63ae)] at io.appium.uiautomator2.server.AppiumServlet.handleRequest(AppiumServlet.java:252)  
> 2020-08-27 09:39:03:493 - [debug] [W3C (2f8f63ae)] at io.appium.uiautomator2.server.AppiumServlet.handleHttpRequest(AppiumServlet.java:242)  
> 2020-08-27 09:39:03:494 - [debug] [W3C (2f8f63ae)] at io.appium.uiautomator2.http.ServerHandler.channelRead(ServerHandler.java:51)  
> 2020-08-27 09:39:03:494 - [debug] [W3C (2f8f63ae)] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366)  
> 2020-08-27 09:39:03:494 - [debug] [W3C (2f8f63ae)] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:352)  
> 2020-08-27 09:39:03:494 - [debug] [W3C (2f8f63ae)] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:345)  
> 2020-08-27 09:39:03:494 - [debug] [W3C (2f8f63ae)] at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)  
> 2020-08-27 09:39:03:494 - [debug] [W3C (2f8f63ae)] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366)  
> 2020-08-27 09:39:03:494 - [debug] [W3C (2f8f63ae)] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:352)  
> 2020-08-27 09:39:03:494 - [debug] [W3C (2f8f63ae)] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:345)  
> 2020-08-27 09:39:03:494 - [debug] [W3C (2f8f63ae)] at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:435)  
> 2020-08-27 09:39:03:495 - [debug] [W3C (2f8f63ae)] at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293)  
> 2020-08-27 09:39:03:495 - [debug] [W3C (2f8f63ae)] at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:267)  
> 2020-08-27 09:39:03:495 - [debug] [W3C (2f8f63ae)] at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:250)  
> 2020-08-27 09:39:03:495 - [debug] [W3C (2f8f63ae)] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366)  
> 2020-08-27 09:39:03:495 - [debug] [W3C (2f8f63ae)] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:352)  
> 2020-08-27 09:39:03:495 - [debug] [W3C (2f8f63ae)] at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:345)  
> 2020-08-27 09:39:03:495 - [debug] [W3C (2f8f63ae)] at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1294)  
> 2020-08-27 09:39:03:495 - [debug] [W3C (2f8f63ae)] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:366)  
> 2020-08-27 09:39:03:495 - [debug] [W3C (2f8f63ae)] at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:352)  
> 2020-08-27 09:39:03:495 - [debug] [W3C (2f8f63ae)] at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:911)  
> 2020-08-27 09:39:03:496 - [debug] [W3C (2f8f63ae)] at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)  
> 2020-08-27 09:39:03:496 - [debug] [W3C (2f8f63ae)] at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:611)  
> 2020-08-27 09:39:03:496 - [debug] [W3C (2f8f63ae)] at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:552)  
> 2020-08-27 09:39:03:496 - [debug] [W3C (2f8f63ae)] at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:466)  
> 2020-08-27 09:39:03:496 - [debug] [W3C (2f8f63ae)] at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:438)  
> 2020-08-27 09:39:03:496 - [debug] [W3C (2f8f63ae)] at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:140)  
> 2020-08-27 09:39:03:496 - [debug] [W3C (2f8f63ae)] at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)  
> 2020-08-27 09:39:03:496 - [debug] [W3C (2f8f63ae)] at java.lang.Thread.run(Thread.java:761)  
> 2020-08-27 09:39:03:496 - [debug] [W3C (2f8f63ae)]
> 
> Any idea what could be the reason?

---

<div class="post-metadata">

**Author:** ![Aleksei](https://discuss.appium.io/user_avatar/discuss.appium.io/aleksei/32/6267_2.png) [@Aleksei](https://discuss.appium.io/u/Aleksei)\
**Post date:** [August 27, 2020, 10:16am UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709/11 "2020-08-27T10:16:46Z")

</div>

You should ignore scrollForward errors like in example i wrote with try-catch.

Plus after scroll you should search for element again! But you checking that some old found element displaying.

---

<div class="post-metadata">

**Author:** ![mehedihasan619](https://discuss.appium.io/user_avatar/discuss.appium.io/mehedihasan619/32/7945_2.png) [@mehedihasan619](https://discuss.appium.io/u/mehedihasan619)\
**Post date:** [August 28, 2020, 11:10am UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709/12 "2020-08-28T11:10:51Z")

</div>

Thank you so much. That was so silly about them.  
Here is the full working solution:

```
	public void scrollUntilElementFound(AppiumDriver<?> driver, MobileElement elementScrollTo,String parentScrollViewId) {//Scrolls until element is found
	boolean elementFound = false;
	while(elementFound==false) {
		try {
			if(elementScrollTo.isDisplayed()==true) {
				break;
			}
		}catch(Exception e) {
			elementFound=false;
		}
		try {
			driver.findElement(MobileBy.AndroidUIAutomator("new UiScrollable(new UiSelector().description(\""+parentScrollViewId+"\")).scrollForward()"));
		}catch(Exception e) {
			//Ignore error 	
		}
	}
}
```

---

<div class="post-metadata">

**Author:** ![mehedihasan619](https://discuss.appium.io/user_avatar/discuss.appium.io/mehedihasan619/32/7945_2.png) [@mehedihasan619](https://discuss.appium.io/u/mehedihasan619)\
**Post date:** [September 2, 2020, 4:45pm UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709/13 "2020-09-02T16:45:11Z")

</div>

@Aleksei  
I am using the above script to scroll down but it is super slow like it takes 10+ seconds between two scrolls. Do you have any suggestions to improve this?

I found that If I only use the scrolling code snippet for example, the below line then the scrolling is fast enough (1.5 seconds between two scrolls). So I assume it’s the text search part that is causing the delay.

`driver.findElement(MobileBy.AndroidUIAutomator("new UiScrollable(new UiSelector().description(\""+parentScrollViewId+"\")).scrollForward()"));`

---

<div class="post-metadata">

**Author:** ![Aleksei](https://discuss.appium.io/user_avatar/discuss.appium.io/aleksei/32/6267_2.png) [@Aleksei](https://discuss.appium.io/u/Aleksei)\
**Post date:** [September 2, 2020, 6:20pm UTC](https://discuss.appium.io/t/scrolling-using-uiscrollable-stops-in-the-middle-of-the-screen/31709/14 "2020-09-02T18:20:55Z")

</div>

Log each action. What cause it.  
“elementScrollTo.isDisplayed()” or scroll itself. As workaround use simple scroll example from tutorial.