16. Compose 权限申请Permission-爱代码爱编程

2021-10-14 分类: android compose android comp

@ExperimentalPermissionsApi
class PermissionActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            FeatureThatRequiresCameraPermission { startAppSettings() }
//            FeatureThatRequiresCameraPermission1 { startAppSettings() }
        }
    }

    private fun startAppSettings() {
        val intent = Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS)
        intent.data = Uri.parse("package:$packageName")
        startActivity(intent)
    }

    
    @Composable
    private fun FeatureThatRequiresCameraPermission(navigateToSettingsScreen: () -> Unit) {
        // Track if the user doesn't want to see the rationale any more.
        var doNotShowRationale by rememberSaveable { mutableStateOf(false) }

        val cameraPermissionState = rememberPermissionState(android.Manifest.permission.CAMERA)
        PermissionRequired(
            permissionState = cameraPermissionState,
            permissionNotGrantedContent = {
                if (doNotShowRationale) {
                    Text("Feature not available")
                } else {
                    Column {
                        Text("The camera is important for this app. Please grant the permission.")
                        Spacer(modifier = Modifier.height(8.dp))
                        Row {
                            Button(onClick = { cameraPermissionState.launchPermissionRequest() }) {
                                Text("Ok!")
                            }
                            Spacer(Modifier.width(8.dp))
                            Button(onClick = { doNotShowRationale = true }) {
                                Text("Nope")
                            }
                        }
                    }
                }
            },
            permissionNotAvailableContent = {
                Column {
                    Text(
                        "Camera permission denied. See this FAQ with information about why we " +
                                "need this permission. Please, grant us access on the Settings screen."
                    )
                    Spacer(modifier = Modifier.height(8.dp))
                    Button(onClick = navigateToSettingsScreen) {
                        Text("Open Settings")
                    }
                }
            }
        ) {
            Text("Camera permission Granted")
        }
    }

    @Composable
    private fun FeatureThatRequiresCameraPermission1(
        navigateToSettingsScreen: () -> Unit
    ) {
        // Track if the user doesn't want to see the rationale any more.
        var doNotShowRationale by rememberSaveable { mutableStateOf(false) }

        // Camera permission state
        val cameraPermissionState = rememberPermissionState(
            android.Manifest.permission.CAMERA
        )

        when {
            // If the camera permission is granted, then show screen with the feature enabled
            cameraPermissionState.hasPermission -> {
                Text("Camera permission Granted")
            }
            // If the user denied the permission but a rationale should be shown, or the user sees
            // the permission for the first time, explain why the feature is needed by the app and allow
            // the user to be presented with the permission again or to not see the rationale any more.
            cameraPermissionState.shouldShowRationale ||
                    !cameraPermissionState.permissionRequested -> {
                if (doNotShowRationale) {
                    Text("Feature not available")
                } else {
                    Column {
                        Text("The camera is important for this app. Please grant the permission.")
                        Spacer(modifier = Modifier.height(8.dp))
                        Row {
                            Button(onClick = { cameraPermissionState.launchPermissionRequest() }) {
                                Text("Request permission")
                            }
                            Spacer(Modifier.width(8.dp))
                            Button(onClick = { doNotShowRationale = true }) {
                                Text("Don't show rationale again")
                            }
                        }
                    }
                }
            }
            // If the criteria above hasn't been met, the user denied the permission. Let's present
            // the user with a FAQ in case they want to know more and send them to the Settings screen
            // to enable it the future there if they want to.
            else -> {
                Column {
                    Text(
                        "Camera permission denied. See this FAQ with information about why we " +
                                "need this permission. Please, grant us access on the Settings screen."
                    )
                    Spacer(modifier = Modifier.height(8.dp))
                    Button(onClick = navigateToSettingsScreen) {
                        Text("Open Settings")
                    }
                }
            }
        }
    }
}

本文链接：https://blog.csdn.net/u010436867/article/details/120768978

android动态申请权限，rxpermissions_qq_36699930的博客-爱代码爱编程

2018-08-13 分类: android rxpermission android动态申请权 android申请权限

android 6.0 (API 23) 之前应用的权限在安装时全部授予，运行时应用不再需要询问用户。在 Android 6.0 或更高版本对权限进行了分类，对某些涉及到用户隐私的权限可在运行时根据用户的需要动态授予。