App Development: "Problem loading widget"

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App Development: "Problem loading widget"

You're happily developing your Google Android widget. You get it compiling. Then you install it to the emulator. Now you try to add your widget to the home screen. The next thing you know, your widget shows the "Problem loading widget" message. What could it be?

The next thing you should do is to run the Dalvik Debug Monitor. Then try adding your widget to the home screen again. If you see the following error message in the log, then it's likely a resource alignment problem.

android.widget.RemoteViews$ActionException: can't find view: 0x...

The "0x..." is actually a hex value pointing to a resource. Android can't find the view resource, yet your app compiles fine. This is usually caused by ant (make utility) not realizing that one of the resource file has changed and the R.java file needs to be regenerated.

Just touch all the resource files or open them and save them again. That will indicate the files have changed to ant and force it to refresh its cache. Now compile again and your app should work.

Chieh Cheng
Sat, 28 Aug 2010 01:45:41 +0000

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