In Activity life-cycle, what is the first and last callback method wil

1.	In Activity life-cycle, what is the first and last callback method will be guaranteed invoked by the system?
Answer» Explicit intents: They specify which application will satisfy the intent, by supplying either the target app's package name or a fully-qualified component class name.For EXAMPLE, to start a component in your own app, because you know the class name of the activity or service you want to start. For example, you might start a new activity within your app in response to a user action, or start a service to download a FILE in the background. Implicit intents: They do not name a specific component, but instead declare a general action to PERFORM, which allows a component from another app to handle it. For example, if you want to show the user a location on a map, you can use an implicit intent to REQUEST that another capable app show a specified location on a map.

In Activity life-cycle, what is the first and last callback method will be guaranteed invoked by the system?

Answer»

Explicit intents:

They specify which application will satisfy the intent, by supplying either the target app's package name or a fully-qualified component class name.For EXAMPLE, to start a component in your own app, because you know the class name of the activity or service you want to start. For example, you might start a new activity within your app in response to a user action, or start a service to download a FILE in the background.

Implicit intents:

They do not name a specific component, but instead declare a general action to PERFORM, which allows a component from another app to handle it. For example, if you want to show the user a location on a map, you can use an implicit intent to REQUEST that another capable app show a specified location on a map.

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