HTTPS SSL error while installing android

I downloaded Android SDK when I run setup, it displays the following error message.

Failed to fetch URL https://dl-ssl.google.com/android/repository/repository.xml, reason: HTTPS SSL error. You might want to force download throug开发者_如何学Ch HTTP in the settings.

Any hints?

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The hint is in the message: use HTTP instead of HTTPS.

The documentation says to do this as follows:

1. With the Android SDK and AVD Manager window open, select "Settings" in the left pane.
2. On the right, in the "Misc" section, check the checkbox labeled "Force https://... sources to be fetched using http://..."
3. Click Save & Apply.

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For me, the checkbox is under

Tools-> Options ... [x] Force https://... source sot be fetched using http://...