Android Compose 权限请求
在Compose中以往的权限请求方式就不再适用了。因此我在使用过程中发现了一种非常简单优雅的权限申请方法。
全部代码见Github Shanyaliux/ComposeDemo (github.com)
实现
权限请求
在
Activity中添加一下请求方法private fun requestPermissions(permissions: Array<String>, onResult: (List<String>) -> Unit) { registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) { result -> val failed = result.filter { !it.value }.keys onResult(failed.toList()) }.launch(permissions) }请求权限，改写
onCreate的部分代码如下override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) val requestList = arrayOf(Manifest.permission.ACCESS_FINE_LOCATION) requestPermissions(requestList) { setContent { if (it.isEmpty()) { Text(text = "已获取全部权限.") } else { RequestFailedDialog(it) } } } }注意
别忘了在Manifest文件中先声明权限
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
请求失败对话框提示（可选）
@Composable
fun RequestFailedDialog(permissions: List<String>) {
val activity = LocalContext.current as? Activity
AlertDialog(onDismissRequest = { },
buttons = {
Row {
Button(
onClick = {
activity?.finish()
},
modifier = Modifier.weight(1f,true),
shape = RoundedCornerShape(bottomStart = 8.dp),
colors = ButtonDefaults.buttonColors(backgroundColor = Color.White),
) {
Text(text = "取消")
}
Button(
onClick = {
val intent = Intent()
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
intent.action = "android.settings.APPLICATION_DETAILS_SETTINGS"
intent.data = Uri.fromParts("package", activity?.packageName, null)
activity?.startActivity(intent)
},
modifier = Modifier.weight(1f,true),
shape = RoundedCornerShape(bottomEnd = 8.dp),
colors = ButtonDefaults.buttonColors(backgroundColor = Color.White),
) {
Text(text = "确定")
}
}
},
title = {
Text(text = "提示")
},
text = {
Surface {
LazyColumn() {
items(permissions) { permission ->
Text(text = permission)
}
}
}
},
shape = RoundedCornerShape(8.dp),
backgroundColor = Color.White,
contentColor = Color.Black,
properties = DialogProperties()
)
}
Demo
完整Demo代码见GitHub：ComposeDemo/app/src/main/java/cn/shanyaliux/composedemo/permission at master · Shanyaliux/ComposeDemo (github.com)
截图
