Android installation/SDK Manager issues

I have downloaded android-sdk_r08-windows.zip and installed it in c:\. When I try to run the SDK Manager, it briefly pops up a DOS window then closes. Trying to run adroid update sdk results in a null pointer exception. I have tried uninstalling/reinstalling the SDK for both android and java multiple times. This is on windows XP SP3. Any ideas?

Thanks,

John

C:\android-sdk-windows>java -version

java version "1.6.0_23"
Java(TM) SE Runtime Environment (build 1.6.0_23-b05)
Java HotSpot(TM) Client VM (build 19.0-b09, mixed mode, sharing)

C:\android-sdk-windows>tools\android.bat update sdk
[INFO] Starting Android SDK and AVD Manager
No command line parameters provided, launching UI.
See 'android --help' for operations from the command line.
java.lang.NullPointerException
        at com.android.sdklib.internal.avd.AvdManager.parseAvdInfo(AvdManager.java:1155)
        at com.android.sdklib.internal.avd.AvdManager.buildAvdList(AvdManager.java:1134)
        at com.android.sdklib.internal.avd.AvdManager.<init>(AvdManager.java:376)
        at com.android.sdkuilib.internal.repository.UpdaterData.initSdk(UpdaterData.java:230)
        at com.android.sdkuilib.internal.repository.UpdaterData.<init>(UpdaterData.java:107)
        at com.android.sdkuilib.internal.repository.UpdaterWindowImpl.<init>(UpdaterWindowImpl.java:86)
        at com.android.sdkuilib开发者_运维技巧.repository.UpdaterWindow.<init>(UpdaterWindow.java:54)
        at com.android.sdkmanager.Main.showMainWindow(Main.java:297)
        at com.android.sdkmanager.Main.doAction(Main.java:260)
        at com.android.sdkmanager.Main.run(Main.java:99)
        at com.android.sdkmanager.Main.main(Main.java:88)

Apparently my system had a residual .android folder lying around from when I played around with the android SDK over a year ago. Renaming that file resulted in the SDK Manager coming up.

Make sure the JDK path is added to the Environmental variables.Its usually happenes when a JDK/JRE uninstall is succeeded by another JDK install

Have you installed the JDK, rather than the JRE?

Also, check that your JAVA_HOME variable points to your JDK install path.

instead of opening android sdk manager open android.bat in tools folder. i think it is sdk\tools

You need make sure that:

1) JDK or JRE is installed
2) Within System Variables, the JAVA_HOME variable is set to your JDK/JRE folder (e.g. C:\Program Files\Java\jre7)
3) Your PATH variable includes %JAVA_HOME%\bin