How to make android app to first thing to be launched after Unlocking phone

I need urgent help to make a android app to be launched after unlocking the phone.

I want always on top kind of functionality in App, Means whenever phone unlocked by the user , they should see the app.

is it Possi开发者_StackOverflow社区ble??

Thank in Advance

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Not really. You could approximate it by having your app replace the home screen/launcher, but the user will still be able to revert to the original one through the settings menu.

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Yes. This thread discusses that there is an Intent Object that you can capture using a BroadcastReceiver. The BroadcastReceiver can then run the code you need or launch an Activity, etc.