Google Inc. is planning to introduce Android-based television software to developers at an event in May, according to people familiar with the matter.

The technology—designed to open set-top boxes, TVs and other devices to more content from the Internet—is attracting interest from partners that include Sony Corp., Intel Corp. and Logitech International SA, which are expected to offer products that support the software, these people said. None have so far discussed the efforts publicly.

Google,...