srllka.blogg.se - Android studio toast message before next activity starts

src/com/cookbook/activity_lifecycle/ActivityLifecycle.java package com.cookbook. (This is similar to taking an incoming phone call.)

Letting the screen sleep pauses the activity and the screen awakening resumes it.

Pressing the Application icon might start a new instance of the activity, even if the old one was not destroyed.

Pressing the Home button pauses the activity, but does not destroy it.

Changing the screen orientation destroys and recreates the activity from scratch.

Run it on an Android device and try various cases. For illustration purposes, each overridden function is explicit and a Toast command is added to show on screen when the function is entered (more detail on the Toast widget is provided in Chapter 3). The following recipe provides a simple way to see the activity lifecycle in action.

imgnew ImageView(this) // give the drawble resource for the ImageView img. Recipe: Utilizing Other Lifecycle Functions setImageResource(R.drawable.android) TextView text (TextView) layout.