Compose - 权限申请

06-26 1353阅读

官方介绍

（图片来源网络，侵删）

一、概念

二、使用 Accompanist Permissions

官方介绍

不同版本中，权限状态（如PermissionState）中获取属性的方法不同，例如在“0.23.1”中，通过 PermissionState.hasPermission 属性拿到是否通过的 Boolean 值，在“0.35.0-alpha”中，通过 PermissionState.status.isGranted 属性拿到。

	单个权限	多个权限
添加权限	@Composable fun rememberPermissionState( permission: String ): PermissionState	@Composable fun rememberMultiplePermissionsState( permissions: List ): MultiplePermissionsState
发起请求	fun launchPermissionRequest(): Unit	fun launchMultiplePermissionRequest(): Unit
权限回调	@Composable fun PermissionRequired( permissionState: PermissionState, permissionNotGrantedContent: @Composable (() -> Unit), permissionNotAvailableContent: @Composable (() -> Unit), content: @Composable (() -> Unit), )	@Composable fun PermissionsRequired( multiplePermissionsState: MultiplePermissionsState, permissionsNotGrantedContent: @Composable (() -> Unit), permissionsNotAvailableContent: @Composable (() -> Unit), content: @Composable (() -> Unit), )

2.1 添加依赖

implementation "com.google.accompanist:accompanist-permissions:0.35.1-alpha"

2.2 单个权限申请

val permissionState = rememberPermissionState(
    Manifest.permission.CAMERA
)
PermissionRequired(
    permissionState = permissionState,
    permissionNotGrantedContent = {    //还未申请或点击了拒绝
        Button(onClick = { permissionState.launchPermissionRequest() }) {
            Text("点击申请")
        }
    },
    permissionNotAvailableContent = {    //点击了不再询问
        Text("无权限")
    }
) {    //点击了通过
    Text("已授予")
}

2.3 多个权限申请

val permissionState = rememberMultiplePermissionsState(
    listOf(
        Manifest.permission.CAMERA,
        Manifest.permission.READ_EXTERNAL_STORAGE,
        Manifest.permission.WRITE_EXTERNAL_STORAGE,
        Manifest.permission.RECORD_AUDIO
    )
)
LaunchedEffect(Unit) {
    permissionState.launchMultiplePermissionRequest()
}