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I'm writing an app that constantly polls the device's sensors and every so often should write down some statistics to a file. This could be as fast as once a second or as slow once a minute. Should I use Handler's postDelayed()method or just schedule it with the AlarmManager?
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Interface AlarmManager. Deprecated. Interfaces for alarms and alarm management are replaced by ManagedScheduledExecutorService and related interfaces.
Unlike WorkManager, AlarmManager wakes a device from Doze mode. It is therefore not efficient in terms of power and resource management.
What is this permission? The new exact alarm permission ( SCHEDULE_EXACT_ALARM ) was created to save system resources. Alarms that must be executed in an exact time may be triggered when the phone is on power-saving mode or Doze, making the app consumes more battery than it should.
By the help of Android AlarmManager in android, you can schedule your application to run at a specific time in the future. It works whether your phone is running or not. The Android AlarmManager holds a CPU wake lock that provides guarantee not to sleep the phone until broadcast is handled.
This should help you discriminate between Handler and AlarmManager.
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Though it is agreed these mostly work for API 23. It's a new release.
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If the app should work in standby then AlarmManager. If not then Handler.AlarmManager will wake CPU therefore it will drain battery more, while Handler will not work on standby.
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