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android tooltip for imageview to show “pinch to zoom”

android tooltip for imageview to show "pinch to zoom", i am done with TouchImageView it is working very good, but i want to show user that image is able to zoom-in and zoom-out.

the tooltip will show on start activity with message "pinch to zoom" how to do that, thanks in advance.

Initial tips for android application

You can use my library for this approach. Let me know if it is suitable for you or maybe you get any issues with it.
https://github.com/mpetlyuk/initial_tips

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