am — Android activity manager. More information: <https://developer.android.com/tools/adb#am>.

Start the activity with a specific component and package [n]ame

am start -n {{com.android.settings/.Settings}}

Start an intent [a]ction and pass [d]ata to it

am start -a {{android.intent.action.VIEW}} -d {{tel:123}}

Start an activity matching a specific [a]ction and [c]ategory

am start -a {{android.intent.action.MAIN}} -c {{android.intent.category.HOME}}

Convert an intent to a URI

am to-uri -a {{android.intent.action.VIEW}} -d {{tel:123}}