Starting an Activity
A simplified illustration of the Activity lifecycle, expressed as a step pyramid. This shows how, for every callback
used to take the activity a step toward the Resumed state at the top, there's a callback method that takes the activity a step down. The activity can also return to the resumed state from the Paused and Stopped state.
However, only three of these states can be static. That is, the
activity can exist in one of only three states for an extended peri......
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