This is an excerpt from Learn by Doing - Android for Beginners on Udemy.
https://www.udemy.com/learn-by-doing-...
Learn how to use an intent to make a phone call from your application.
Things to Remember
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1. Intent action to be used is Intent.ACTION_CALL.
2. The URI's format is "tel:phone_number".
3. You need to add the android.permission.CALL_PHONE permission to your manifest, or else a security exception will be thrown.
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