Start android application without activity

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Apart from the two options mentioned by EboMike: You can always send the BOOT_COMPLETED broadcast via the command line instead of rebooting your phone.

Use

adb shell am broadcast -a android.intent.action.BOOT_COMPLETED

This will result in a situation like after an actual reboot, and will also trigger any 3rd party apps boot receivers. After typing it once in a terminal you can usually repeat it simply by pressing the up-arrow key followed by return on most operating systems. Or you can include it in a script thats triggered after reinstalling your app.

If you want to limit the broadcast to your app only, you can also specify a component:

adb shell am broadcast -a android.intent.action.BOOT_COMPLETED -n your.app.packagename/.YourReceiverClassName

This sends the reboot broadcast only to your receiver. All other apps are not called.

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