Android Emulator & Surface Duo Show Different Data

Question

Android Emulator & Surface Duo Show Different Data

Nathan Sokalski 4,111

I have an app that uses RecyclerView(s) to display several lists of numbers. One of the lists is a generated list of integers from 1 to the maximum number items in the other lists. However, here are screenshots from the Android Emulator & Surface Duo Emulator:

Notice that the Surface Duo Emulator only display the numbers 1-9 rather than the generated list. I have confirmed that the correct list of numbers is generated. I also tested it on a physical Surface Duo, but the same problem occurs. Why is the Surface Duo displaying 1-9 rather than the generated list? Displaying a list of integers seems like it should be pretty basic, but it seems even stranger that it is different on two devices (or 3 if you include the physical Surface Duo), which implies to me that it has something to do with the device rather than my code. Is this a known bug? Is there really something I need to do differently for this? Both emulators are Android 10.0 API 29. Any help would be appreciated. Thanks.

JessieZhang-MSFT 7,721 Reputation points Microsoft External Staff

2021-04-26T02:03:21.23+00:00

Is the first column the list that you are using RecyclerView to display? Could you please post a basic demo to github or onedriver so that we can test on our side?
Ken Tucker 5,866 Reputation points

2021-04-26T10:01:26.26+00:00

If you make the column that is only displaying to 9 wider do the other numbers show?

Nathan Sokalski 4,111

Interesting, they do (I had not tried that). However, because I need to calculate the width, I must determine the appropriate value for that width. Here is the code I use to do that calculation:

TextView tv = new TextView(Application.Context, null, 0, Resource.Style.ItemTextView);
Rect bounds = new Rect();
//Get numbers to display
IEnumerable<int> roundnums = Enumerable.Range(1, MainActivity.Players.Max((pd) => pd.Scores.Count) + 1);
//Get max width of roundnums
int maxwidth = roundnums.Max((roundnumber) => { tv.Paint.GetTextBounds(roundnumber.ToString(), 0, roundnumber.ToString().Length, bounds); return bounds.Width(); });
//Multiply by appropriate ratio
int roundnumberswidth = (int)(maxwidth * tv.Context.Resources.DisplayMetrics.Density);

Is there something wrong in my calculation?

JessieZhang-MSFT 7,721 Reputation points Microsoft External Staff

2021-04-28T09:02:43.97+00:00

For this, you can post a new issue here: https://github.com/xamarin/Xamarin.Forms/issues .