Câu hỏi phỏng vấn Android
Câu hỏi

Explain when would you call ge...

Câu trả lời

Here is an explanation of when to call getApplicationContext() and why:

When to call getApplicationContext()

You should call getApplicationContext() when:

  1. You need a global context that is not tied to the lifecycle of an Activity or Service. The application context exists for the lifetime of your app.

  2. You need to access application-wide state or resources that should not be dependent on the current UI context.

  3. You are in a non-UI thread like a Service, BroadcastReceiver, or AsyncTask and need to access application-level resources.

  4. You are in a static method and need to access application-level resources.

Why to call getApplicationContext()

There are a few key reasons to use getApplicationContext():

  1. It provides a global context that is not tied to the lifecycle of a specific component. This ensures you don't leak memory by holding onto a context that may be destroyed.

  2. It allows you to access application-wide state and resources like the SharedPreferences, ContentProviders, etc. without being dependent on the current UI context.

  3. **It is safe to use in n...

expert

expert

Gợi ý câu hỏi phỏng vấn

middle

What is the difference between invisible and gone for the View visibility status?

expert

What happens if the user navigates away or closes the app while I still have a reference to the Activity
the user just closed in my AsyncTask ?

entry

What is the difference between Bitmap and Drawable in Android?

Bình luận

Chưa có bình luận nào

Chưa có bình luận nào