annotation-v9:2.0.1:SymbolOptions().withTextField("中文") only works with chinese?!

[alx696]

version:

• org.maplibre.gl:android-sdk:10.2.0
• org.maplibre.gl:android-plugin-annotation-v9:2.0.1

Only chinese works, any other characters will not work. Why? Is my usage wrong?

Works:

Symbol symbol = symbolManager.create(
        new SymbolOptions()
                .withLatLng(
                        new LatLng(28.693, 101.30934)
                )
                .withTextField("中文")
);
symbolManager.update(symbol);

Not works:

Symbol symbol = symbolManager.create(
        new SymbolOptions()
                .withLatLng(
                        new LatLng(28.693, 101.30934)
                )
                .withTextField("中文hi") // hi, 中文123, 中-文 not work
);
symbolManager.update(symbol);

If any withTextField contains non-chinese , all Symbol can not show.

[alx696]

The other problem: SymbolManager.setSymbolPlacement("line") not work.

I need to add label on line, but can not find any document. So i try to add Symbol with the point on line. But if set SymbolManager.setSymbolPlacement("line") , all Symbol can not show.

[alx696]

@louwers through this issue maplibre/maplibre-native#869 , I found that the reason was text font not set. SymbolLayer have same problem.

Although the problem disappears after setting the font. This problem is still strange. It is recommended to use the system default font if no font is set.

If the problem cannot be solved for the time being, I hope there will be documentation explaining which options are required, or throw an exception if no required options.