读写联系人权限-Kotlinandroid

kse8i1jr 于 2023-01-09 发布在 Kotlin

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当你打开应用程序时，它会询问是否给予用户访问联系人列表，如果用户点击“是”，主页就会打开--到目前为止我的代码还能正常工作;如果用户点击“否”，则会弹出一个窗口，用户会再次请求权限。
问题是弹出窗口确实弹出了，但我无法让它再次请求访问。
下面是我代码-（JetPack编写器，Kotlin）

var APP_ACTIVITY: Context? = null

private const val REQUEST_CODE_CONTACTS_PERMISSION = 1

class MainActivity : ComponentActivity() {

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    APP_ACTIVITY = this
    setContent {
        MyApp {

            if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED
                || ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_CONTACTS) != PackageManager.PERMISSION_GRANTED) {

                // Request read and write permission
                ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.READ_CONTACTS, Manifest.permission.WRITE_CONTACTS), REQUEST_CODE_CONTACTS_PERMISSION)

            } else {
                // Permission has already been granted, go to home page
                ContactNavigation()
            }

        }
    }
}


override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults)
    when (requestCode) {
        REQUEST_CODE_CONTACTS_PERMISSION -> {

            if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                // Permission was granted, go to home page
                setContent {
                        MyApp {
                            ContactNavigation()

                        }
                    }
            } else {
                Toast.makeText(this, "Permission denied", Toast.LENGTH_SHORT).show()

                    // Request read and write contacts permission again - DOES NOT SHOW
                  //  ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.READ_CONTACTS, Manifest.permission.WRITE_CONTACTS), REQUEST_CODE_CONTACTS_PERMISSION)
                }
            }
        }
    }
}

kotlin

来源：https://stackoverflow.com/questions/75046855/read-and-write-contacts-permission-kotlin-android

1条答案

按热度按时间

ogq8wdun1#

1、首先，我建议您使用以下权限库：

api "com.google.accompanist:accompanist-permissions:0.28.0"

2、定义一个请求权限的方法，提供2个回调函数获取当前是否获得权限：

@ExperimentalPermissionsApi
@Composable
fun requestMultiplePermission(
    permissions: List<String>,
    onNoGrantPermission: () -> Unit = {},
    onGrantAllPermission: () -> Unit = {}
): MultiplePermissionsState {
    return rememberMultiplePermissionsState(
        permissions = permissions,
        onPermissionsResult = { mapInfo ->
            val noGrantPermissionMap = mapInfo.filter { !it.value }
            if (noGrantPermissionMap.isNotEmpty()) {
                onNoGrantPermission.invoke()
            } else {
                onGrantAllPermission.invoke()
            }
        }
    )
}

3、代码显示如下：

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContent {
        MyApp {
            val reqContractPermission = requestMultiplePermission(
                permissions = listOf(
                    Manifest.permission.READ_CONTACTS,
                    Manifest.permission.WRITE_CONTACTS
                ),
                onGrantAllPermission = {
                    ContactNavigation()
                },
                onNoGrantPermission = {
                    //Please jump to [Settings] - [App Application Details],
                    // and then guide the user to open [read and write contacts permission].
                }
            )
            LaunchedEffect(Unit) {
                if (!reqContractPermission.allPermissionsGranted) {
                    reqContractPermission.launchMultiplePermissionRequest()
                } else {
                    ContactNavigation()
                }
            }
        }
    }
}

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读写联系人权限-Kotlinandroid

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