java.lang.NoSuchMethodError: java.lang.String.isEmpty

[Andre Höpfner]

A tester reported a exception with 0.4.0

06-08 17:18:00.928 E/AndroidRuntime(28631): FATAL EXCEPTION: Thread-53
06-08 17:18:00.928 E/AndroidRuntime(28631): java.lang.NoSuchMethodError: java.lang.String.isEmpty
06-08 17:18:00.928 E/AndroidRuntime(28631):     at org.mapsforge.map.rendertheme.XmlUtils.getColor(XmlUtils.java:72)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at org.mapsforge.map.rendertheme.rule.RenderThemeBuilder.extractValues(RenderThemeBuilder.java:73)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at org.mapsforge.map.rendertheme.rule.RenderThemeBuilder.<init>(RenderThemeBuilder.java:48)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at org.mapsforge.map.rendertheme.rule.RenderThemeHandler.startElement(RenderThemeHandler.java:126)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at org.apache.harmony.xml.ExpatParser.startElement(ExpatParser.java:146)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at org.apache.harmony.xml.ExpatParser.append(Native Method)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at org.apache.harmony.xml.ExpatParser.parseFragment(ExpatParser.java:521)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at org.apache.harmony.xml.ExpatParser.parseDocument(ExpatParser.java:482)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at org.apache.harmony.xml.ExpatReader.parse(ExpatReader.java:336)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at org.apache.harmony.xml.ExpatReader.parse(ExpatReader.java:293)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at org.mapsforge.map.rendertheme.rule.RenderThemeHandler.getRenderTheme(RenderThemeHandler.java:71)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at CB_Core.Map.ManagerBase.getMapsforgePixMap(ManagerBase.java:559)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at de.cachebox_test.Map.AndroidManager.LoadLocalPixmap(AndroidManager.java:59)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at CB_Core.Map.ManagerBase.LoadInvertedPixmap(ManagerBase.java:137)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at CB_Core.Map.MapTileLoader.LoadTile(MapTileLoader.java:534)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at CB_Core.Map.MapTileLoader.access$3(MapTileLoader.java:527)
06-08 17:18:00.928 E/AndroidRuntime(28631):     at CB_Core.Map.MapTileLoader$queueProcessor.run(MapTileLoader.java:452)
06-08 17:18:01.139 W/ActivityManager(1388):   Force finishing activity de.cachebox_test/.main

I'll catch him, but maybe it's also possible to you, this does not even create.

colorString.isEmpty () seems not to be included on any device.

Maybe this would be a colorString.length ()> 0 will be better?

Greeting Andre

[Ludwig]

String.isEmpty() is available from Android 9 (2.3), versions below Android 9 are not supported by the rewrite branch. You will need to adjust your AndroidManifest.

http://developer.android.com/reference/java/lang/String.html#isEmpty%28%29

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[Andre Höpfner]

I can understand you, but this is the only place in all of the code used String.isEmpty().

And change this one line makes Mapsforge Level 8 Compatible what our users have confirmed!

Greeting Andre

[Thilo Mühlberg]

According to http://developer.android.com/about/dashboards/index.html
less than five percent of all Android devices (which visit the Google
Play store) are using an API level < 9. Android 2.2 (aka "Froyo") was
released in Mai 2010, so it is already more than three years old.

This decision is an example of the Pareto principle. As our development
resources are very limited we simply cannot please everyone. Don't
forget that there are also other differences besides String.isEmpty()
and I do not even own a 2.2 device to test compatibility work-arounds.
Using the crappy emulator from the SDK instead is just a waste of time.
Therefore I do not strive for compatibility with such old API levels.

Best regards,
Thilo

On 12/06/13 13:08, Andre Höpfner wrote:
> I can understandyou, but this is the only place in all of the code used

[Andre Höpfner]

I can understand that and our Developer Console on Google Play says that only 2.43% of our users are using 2.2.
But if here already cry out our beta testers, then I have to try it at least.

And the old version String.length () == 0 works in all versions of Android.

And it's really only one place.

But as I said, I can understand you, but I would install a patched version for our users in us if I can not convince you, this one line to change!

Greeting Andre