I started developing on Android and I’m encountering some problems with eclipse:
there is image:

What should I do to show javadoc?
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You need to download and attach the source code.
1) Open the SDK Manager and download “Sources for Android SDK” under the latest or appropriate API.
2) Ctrl+Click any Android class or method then click the “Attach Source Code” button in the window that appears. Next select “External Folder” and navigate to
<android-SDK>\sources\android-xx.<android-SDK>is the folder that holds your SDKxxrefers to your appropriate API