我在类的请求运行的权限Activity或Fragment
它还可以帮助您显示基本原理或打开设置以在用户拒绝权限（启用/不使用Never ask again）选项后启用权限更加容易
class RequestPermissionHandler(private val activity: Activity? = null,
private val fragment: Fragment? = null,
private val permissions: Set<String> = hashSetOf(),
private val listener: Listener? = null
) {
private var hadShowRationale: Boolean = false
fun requestPermission() {
hadShowRationale = showRationaleIfNeed()
if (!hadShowRationale) {
doRequestPermission(permissions)
}
}
fun retryRequestDeniedPermission() {
doRequestPermission(permissions)
}
private fun showRationaleIfNeed(): Boolean {
val unGrantedPermissions = getPermission(permissions, Status.UN_GRANTED)
val permanentDeniedPermissions = getPermission(unGrantedPermissions, Status.PERMANENT_DENIED)
if (permanentDeniedPermissions.isNotEmpty()) {
val consume = listener?.onShowSettingRationale(unGrantedPermissions)
if (consume != null && consume) {
return true
}
}
val temporaryDeniedPermissions = getPermission(unGrantedPermissions, Status.TEMPORARY_DENIED)
if (temporaryDeniedPermissions.isNotEmpty()) {
val consume = listener?.onShowPermissionRationale(temporaryDeniedPermissions)
if (consume != null && consume) {
return true
}
}
return false
}
fun requestPermissionInSetting() {
val intent = Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS)
val packageName = activity?.packageName ?: run {
fragment?.requireActivity()?.packageName
}
val uri = Uri.fromParts("package", packageName, null)
intent.data = uri
activity?.apply {
startActivityForResult(intent, REQUEST_CODE)
} ?: run {
fragment?.startActivityForResult(intent, REQUEST_CODE)
}
}
fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>,
grantResults: IntArray) {
if (requestCode == REQUEST_CODE) {
for (i in grantResults.indices) {
if (grantResults[i] == PackageManager.PERMISSION_GRANTED) {
markNeverAskAgainPermission(permissions[i], false)
} else if (!shouldShowRequestPermissionRationale(permissions[i])) {
markNeverAskAgainPermission(permissions[i], true)
}
}
var hasShowRationale = false
if (!hadShowRationale) {
hasShowRationale = showRationaleIfNeed()
}
if (hadShowRationale || !hasShowRationale) {
notifyComplete()
}
}
}
fun onActivityResult(requestCode: Int) {
if (requestCode == REQUEST_CODE) {
getPermission(permissions, Status.GRANTED).forEach {
markNeverAskAgainPermission(it, false)
}
notifyComplete()
}
}
fun cancel() {
notifyComplete()
}
private fun doRequestPermission(permissions: Set<String>) {
activity?.let {
ActivityCompat.requestPermissions(it, permissions.toTypedArray(), REQUEST_CODE)
} ?: run {
fragment?.requestPermissions(permissions.toTypedArray(), REQUEST_CODE)
}
}
private fun getPermission(permissions: Set<String>, status: Status): Set<String> {
val targetPermissions = HashSet<String>()
for (p in permissions) {
when (status) {
Status.GRANTED -> {
if (isPermissionGranted(p)) {
targetPermissions.add(p)
}
}
Status.TEMPORARY_DENIED -> {
if (shouldShowRequestPermissionRationale(p)) {
targetPermissions.add(p)
}
}
Status.PERMANENT_DENIED -> {
if (isNeverAskAgainPermission(p)) {
targetPermissions.add(p)
}
}
Status.UN_GRANTED -> {
if (!isPermissionGranted(p)) {
targetPermissions.add(p)
}
}
}
}
return targetPermissions
}
private fun isPermissionGranted(permission: String): Boolean {
return activity?.let {
ActivityCompat.checkSelfPermission(it, permission) == PackageManager.PERMISSION_GRANTED
} ?: run {
ActivityCompat.checkSelfPermission(fragment!!.requireActivity(), permission) == PackageManager.PERMISSION_GRANTED
}
}
private fun shouldShowRequestPermissionRationale(permission: String): Boolean {
return activity?.let {
ActivityCompat.shouldShowRequestPermissionRationale(it, permission)
} ?: run {
ActivityCompat.shouldShowRequestPermissionRationale(fragment!!.requireActivity(), permission)
}
}
private fun notifyComplete() {
listener?.onComplete(getPermission(permissions, Status.GRANTED), getPermission(permissions, Status.UN_GRANTED))
}
private fun getPrefs(context: Context): SharedPreferences {
return context.getSharedPreferences("SHARED_PREFS_RUNTIME_PERMISSION", Context.MODE_PRIVATE)
}
private fun isNeverAskAgainPermission(permission: String): Boolean {
return getPrefs(requireContext()).getBoolean(permission, false)
}
private fun markNeverAskAgainPermission(permission: String, value: Boolean) {
getPrefs(requireContext()).edit().putBoolean(permission, value).apply()
}
private fun requireContext(): Context {
return fragment?.requireContext() ?: run {
activity!!
}
}
enum class Status {
GRANTED, UN_GRANTED, TEMPORARY_DENIED, PERMANENT_DENIED
}
interface Listener {
fun onComplete(grantedPermissions: Set<String>, deniedPermissions: Set<String>)
fun onShowPermissionRationale(permissions: Set<String>): Boolean
fun onShowSettingRationale(permissions: Set<String>): Boolean
}
companion object {
const val REQUEST_CODE = 200
}
}
在Activity喜欢使用
class MainActivity : AppCompatActivity() {
private lateinit var smsAndStoragePermissionHandler: RequestPermissionHandler
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
smsAndStoragePermissionHandler = RequestPermissionHandler(this@MainActivity,
permissions = setOf(Manifest.permission.RECEIVE_SMS, Manifest.permission.READ_EXTERNAL_STORAGE),
listener = object : RequestPermissionHandler.Listener {
override fun onComplete(grantedPermissions: Set<String>, deniedPermissions: Set<String>) {
Toast.makeText(this@MainActivity, "complete", Toast.LENGTH_SHORT).show()
text_granted.text = "Granted: " + grantedPermissions.toString()
text_denied.text = "Denied: " + deniedPermissions.toString()
}
override fun onShowPermissionRationale(permissions: Set<String>): Boolean {
AlertDialog.Builder(this@MainActivity).setMessage("To able to Send Photo, we need SMS and" + " Storage permission")
.setPositiveButton("OK") { _, _ ->
smsAndStoragePermissionHandler.retryRequestDeniedPermission()
}
.setNegativeButton("Cancel") { dialog, _ ->
smsAndStoragePermissionHandler.cancel()
dialog.dismiss()
}
.show()
return true // don't want to show any rationale, just return false here
}
override fun onShowSettingRationale(permissions: Set<String>): Boolean {
AlertDialog.Builder(this@MainActivity).setMessage("Go Settings -> Permission. " + "Make SMS on and Storage on")
.setPositiveButton("Settings") { _, _ ->
smsAndStoragePermissionHandler.requestPermissionInSetting()
}
.setNegativeButton("Cancel") { dialog, _ ->
smsAndStoragePermissionHandler.cancel()
dialog.cancel()
}
.show()
return true
}
})
button_request.setOnClickListener { handleRequestPermission() }
}
private fun handleRequestPermission() {
smsAndStoragePermissionHandler.requestPermission()
}
override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>,
grantResults: IntArray) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults)
smsAndStoragePermissionHandler.onRequestPermissionsResult(requestCode, permissions,
grantResults)
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
smsAndStoragePermissionHandler.onActivityResult(requestCode)
}
}
Github上的代码
演示版