Chap 3 "About" button problem

I’ve got the 3rd edition book. I can get through 3.4, but for the third time now I can’t get the “About” box procedure to work. First, whenever I imported files in, I always got some sort of error associated with “R”. But, if I typed them in by hand or copied them to notepad and then pasted, then most of the time they worked.

But, I got to page 48 without errors until I had to edit the AndroidManifest.xml file. I put in the extra

Ugh.

<?xml version=”1.0” encoding=”utf-8”?>
<manifest xmlns:android=”http://schemas.android.com/apk/res/android” package=”org.example.sudoku” android:versionCode=”1” android:versionName=”1.0”>

You don’t need

</activity android:name=”.About” android:label=@string/about_title”>

in fact, it’s enough with

</activity>

I am not even sure if the former even works, try erasing it.

I deleted the line as you suggested, and I still have a bunch of errors on my lines that have “R” in them in Sudoku.java and About.java.

Change your android manifest file to look like this.

<activity android:name=”.Sudoku” android:label=”@string/app_name”></activity>
<activity android:name=”.About” android:label=@string/about_title”></activity>

then click project—> Build

this should fix any errors.

Cheers,

Austin

Changing the manifest file won’t effect errors in your Java files. Delete any “import android.R;” lines that Eclipse put in there by mistake. Also do a Project > Clean command.