伴奏库中是否有launchPermission的回调函数答案

【问题标题】：Is there a callback function for launchPermission in the Accompanist library伴奏库中是否有launchPermission的回调函数
【发布时间】：2022-08-18 17:09:46
【问题描述】：

Accompanist Permissions 库中执行permissionState.launchPermissionRequest() 后有回调函数吗？我只想在完成后执行一些代码。

标签： android callback android-jetpack-compose android-permissions jetpack-compose-accompanist

【解决方案1】：

我从their guide 复制这个例子：

val cameraPermissionState = rememberPermissionState(
        android.Manifest.permission.CAMERA
    )

    when (cameraPermissionState.status) {
        // If the camera permission is granted, then show screen with the feature enabled
        PermissionStatus.Granted -> {
            Text("Camera permission Granted")
        }
        is PermissionStatus.Denied -> {
            Column {
                val textToShow = if (cameraPermissionState.status.shouldShowRationale) {
                    // If the user has denied the permission but the rationale can be shown,
                    // then gently explain why the app requires this permission
                    "The camera is important for this app. Please grant the permission."
                } else {
                    // If it's the first time the user lands on this feature, or the user
                    // doesn't want to be asked again for this permission, explain that the
                    // permission is required
                    "Camera permission required for this feature to be available. " +
                        "Please grant the permission"
                }
                Text(textToShow)
                Button(onClick = { cameraPermissionState.launchPermissionRequest() }) {
                    Text("Request permission")
                }
            }
        }
    }

2 个回调是：PermissionStatus.Granted 和 PermissionStatus.Denied

【讨论】：

【解决方案2】：

更直接的方法是使用rememberMultiplePermissionsState 或rememberPermissionState 的onPermissionsResult 回调函数，如API documentation 中所述，如下所示：

val multiplePermissionsState = rememberMultiplePermissionsState(permissions = permissions) {            
  //Do post permissions requests operations here even if one or more permissions were denied.
}

【讨论】：