Android service for alarms -

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i pretty new android , started learning concepts. trying create alarm clock im using service class initiate alarm. when set alarm time , have app running in background alarm triggered. @ same time, when set time , close app(long press home button , swipe close apps), don't alarm triggered specific time had set earlier. tried possible ways search same question in forum , did few answers did not solve problem. tried searching on github well.. tried them no luck. not posting code because it's simple 1 had made example understand service. wanted know how stock alarm clock in android works , how triggering alarm if set time , close app. what's difference between start sticky method , start not sticky method? simple no complex terms definition appreciated. tell me how proceed this? small tutorial appreciated. every buddy here in advance.


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