How to get instance in Kotlin with Context.getSystemService(Class)

Question

In Google Android Kotlin documentation, Every now and then there is a below line present in android documentation that: Instances of this class must be obtained using Context.getSystemService(Class)

For example:

Instances of this class must be obtained using Context.getSystemService(Class) with the argument AppOpsManager.class or Context.getSystemService(String) with the argument Context.APP_OPS_SERVICE.

Can someone please clarify what this is and how do I create a instance for class AppOpsManager.

Usually we can create instance like: val use = AppOpsManager()

Please help and explain the above Context.getSystemService().

Thank You.

Son Truong · Accepted Answer · 2019-02-28 03:35:37Z

11

From Android Developer documentation:

AppOpsManager

API for interacting with "application operation" tracking.

This API is not generally intended for third party application developers; most features are only available to system applications.

Instances of this class must be obtained using Context.getSystemService(Class) with the argument AppOpsManager.class or Context.getSystemService(String) with the argument Context.APP_OPS_SERVICE.

To create an instance of this class you must use getSystemService from a context instance.

val appOpsManager: AppOpsManager? = getSystemService(Context.APP_OPS_SERVICE) as AppOpsManager?

If your minSdkVersion is 23 then you can use this code instead.

val appOpsManager: AppOpsManager? = getSystemService(AppOpsManager::class.java)

answered Feb 28, 2019 at 3:35

Son Truong

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2 Comments

Cristan Over a year ago

While the docs say that getSystemService (Class<T> serviceClass) has been added in API level 23, it actually works in older Android versions as long as your targetSdkVersion is 23 or higher.

Danilo Bargen Over a year ago

I cannot confirm what Cristian writes, when using the class based variant with minSdkVersion < 23, Android Studio shows an error message.

Cristan · Accepted Answer · 2019-02-27 16:35:10Z

4

Use the following:

context.getSystemService(AppOpsManager::class.java)

answered Feb 27, 2019 at 16:35

Cristan

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Comments

Andrew Weiss · Accepted Answer · 2022-11-11 09:52:31Z

0

val aom = getSystemService(context, AppOpsManager::class.java)

edited Nov 11, 2022 at 9:52

answered Nov 11, 2022 at 9:52

Andrew Weiss

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