[danhtt]

Help me!
I encountered an error when i code in part "linking activities with content" in "Beginning Android Application Development" book. This error is "The JAR file C:\Program Files\Android\android-sdk\platform\android-16\android.jar has no source attachment.
Detaily, i have an activity which contain a button. When click on this one call to an other activity but appear error above.
startActivity(new Intent( “packagename.ACTIVITY2”));
How I can fix?

[annahid]

I think the problem is more priliminary than that. Maybe your SDK is not installed properly. Have you any problem with your other projects (in case you have)? Please provide more detail on how you created this project. Are you using Eclipse?