Check If Permissions is granted or denied And Request Permissions in Android

여러 개의 권한을 묶어서 권한이 허용되었는지 확인하고, 개중 허용되지 않은 권한들에 대해서 권한 요청을 보내는 상황이다.

 

 - 권한 획득 여부 확인

ContextCompat.checkSelfPermission(Context context, String permission)는 PERMISSION_GRANTED 또는 PERMISSION_DENIED를 반환한다.

 

 - 권한 요청

ActivityCompat.requestPermissions(Activity activity, String[] permissions, int requestCode)는 Array로 묶인 권한들을 전부 요청해준다. 여기서 requestCode는 단순히, 요청을 하는 액티비티를 구분하기 위한 코드이다.

 

 - import

import android.Manifest
import androidx.core.content.ContextCompat
import android.content.pm.PackageManager
import androidx.core.app.ActivityCompat

 

 - Example In Fragment

class Fragment1 : Fragment() {
    private val multiplePermissionsCode = 100
    private val requiredPermissions = arrayOf(
        Manifest.permission.INTERNET,
        Manifest.permission.USE_FULL_SCREEN_INTENT,
        Manifest.permission.FOREGROUND_SERVICE,
        Manifest.permission.RECEIVE_BOOT_COMPLETED
    )
    
	override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        val deniedPermissions = getDeniedPermissions()
        requestPermissions(deniedPermissions)
    }
}

private fun getDeniedPermissions():ArrayList<String>{
        var deniedPermissions = ArrayList<String>()

        for(p in requiredPermissions){
            if(ContextCompat.checkSelfPermission(requireContext(), p) == PackageManager.PERMISSION_DENIED){
                deniedPermissions.add(p)
            }
        }

        return deniedPermissions
    }
 
 private fun requestPermissions(permissions: ArrayList<String>){
        if(permissions.isNotEmpty()){
            val array = arrayOfNulls<String>(permissions.size)
            ActivityCompat.requestPermissions(requireActivity(), permissions.toArray(array), REQUEST_CODE)
        }
    }

 

 - Example in Activity

class MainActivity : AppCompatActivity() {
    private val multiplePermissionsCode = 100
    private val requiredPermissions = arrayOf(
        Manifest.permission.INTERNET,
        Manifest.permission.USE_FULL_SCREEN_INTENT,
        Manifest.permission.FOREGROUND_SERVICE,
        Manifest.permission.RECEIVE_BOOT_COMPLETED
    )
    
	override fun onCreate(savedInstanceState: Bundle?) {
    
        // 지도 권한
        val deniedPermissions = getDeniedPermissions()
        requestPermissions(deniedPermissions)
    }
}

private fun getDeniedPermissions():ArrayList<String>{
        var deniedPermissions = ArrayList<String>()

        for(p in requiredPermissions){
            if(ContextCompat.checkSelfPermission(this, p) == PackageManager.PERMISSION_DENIED){
                deniedPermissions.add(p)
            }
        }

        return deniedPermissions
    }
 
 private fun requestPermissions(permissions: ArrayList<String>){
        if(permissions.isNotEmpty()){
            val array = arrayOfNulls<String>(permissions.size)
            ActivityCompat.requestPermissions(this, permissions.toArray(array), REQUEST_CODE)
        }
    }

 

 

https://developer.android.com/training/permissions/requesting?hl=ko