compose申请权限

最新推荐文章于 2025-04-13 22:45:27 发布

原创最新推荐文章于 2025-04-13 22:45:27 发布 · 343 阅读

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文章标签：

#android #kotlin

以申请消息通知权限为例：

现在manifest中声明权限

<uses-permission android:name="android.permission.POST_NOTIFICATIONS" />

权限申请

@Composable
fun HomeScreen(modifier: Modifier = Modifier) {
    //进入界面后，先判断是否授予权限
    val context = LocalContext.current
    var hasPermission by remember {
        //33之前都有权限，33之后，需要授权
        mutableStateOf(if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
            ContextCompat.checkSelfPermission(
                context,
                Manifest.permission.POST_NOTIFICATIONS
            ) == PackageManager.PERMISSION_GRANTED
        } else true)
    }

    //制定权限授权后的操作，将结果赋予hasPermission
    val permissionLauncher = rememberLauncherForActivityResult(
        contract = ActivityResultContracts.RequestPermission()
    ) { isGranted ->
        hasPermission = isGranted
    }

    Box(
        modifier = modifier
            .fillMaxSize(),
        contentAlignment = Alignment.Center
    ) {
        if(!hasPermission && Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
            //没有权限，显示获取权限按钮，启动permissionLauncher
            Button(onClick = {
                permissionLauncher.launch(Manifest.permission.POST_NOTIFICATIONS)
            }) {
                Text(text = "Request permission")
            }
        } else {
            Text(text = "Home screen") //已经获取权限了，正常显示主页
        }
    }
}

示例来自 pl 的关于deeplink 的时候，需要显示通知，在更高平台上需要动态获取权限