android lifecycle example

android lifecycle example

onCrate()

• Called when: first method to be called.
• Single parameter Bundle, initially null.
• Bundle contains info when activity is restarted.
• Appropriate place to code for: any startup, layout setup & data binding.

onResume()

• Called when: Background activity comes on top of stack and becomes foreground activity.
• Appropriate place to code for: To retrieve any resources required by activity to run.

onPause()

• Called when: When any activity is pushed down the stack i.e. Activity migrates from foreground to background.
• Appropriate place to code for: Stop any audio, video, animation, deactivate resources such as database cursor, clean up & release any resource.

onDestory()

• Called when: When activity is being destroyed (Due to two reason : voluntarily or forcefully by platform.)

onSaveInstanceState() & onRestoreInstanceState()

• Saving & retrieving information state to bundle object.

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Posted in: Android Example