How can I request permission MANAGE_EXTERNAL_STORAGE on android 11 (wear os)
I try this code:
[enter image description here](https://i.stack.imgur.com/AV1Zg.png)
But it alway allow only while using app. Is anyone try it ? How can I grant allow all the time permission.
Related
I'm developing a MAUI Blazor app that should run under windows and android
On Android I get an error from a component that tries to write on the clipboard
blazor.webview.js:1 Write permission denied.
Reading this doc I cannot figure out where and how to call the BlazorWebViewInizializing event to allow this permission
Or should I do something also in the AndroidManifest.xml?
Thanks
For this, you can check document Permissions.
In android, Permissions must have the matching attributes set in the Android Manifest file. Permission status defaults to Denied.
Above article describes how you can use the .NET Multi-platform App UI (.NET MAUI) Permissions class. This class allows you to check and request permissions at run-time. The Permissions type is available in the Microsoft.Maui.ApplicationModel namespace.
Checking permissions:
To check the current status of a permission, use the Permissions.CheckStatusAsync method along with the specific permission to get the status for. The following example checks the status of the LocationWhenInUse permission:
PermissionStatus status = await Permissions.CheckStatusAsync<Permissions.LocationWhenInUse>();
Requesting permissions:
To request a permission from the users, use the Permissions.RequestAsync method along with the specific permission to request. If the user previously granted permission, and hasn't revoked it, then this method will return Granted without showing a dialog to the user. The following example requests the LocationWhenInUse permission:
PermissionStatus status = await Permissions.RequestAsync<Permissions.LocationWhenInUse>();
For more information, you can check document Permissions.
I'm debugging my Android device and trying to pick an image with image_picker through ImageSource.gallery.
The device is asking permission for ALL storage (I'm using permission_handler).
The problem is when I try to check permission status for manageExternalStorage which comes up always as Restricted.
Is there a way to check permission for Storage?
I was able to make it work by changing the permission from manageExternalStorage which is restricted to storage.
I am trying to read a video file which is in byte array using PCL Storage. So I have added the video file in the folder named File using android studio tool. Trying to read from there. The thing is that in my code it can find out that the file exists in the folder but whenever I am trying to read it using the following code I am getting an exception: "Access denied" but I have already enabled the permission in android manifest for reading and writing from external storage
IFolder rootFolder = FileSystem.Current.LocalStorage;
IFile files = await rootFolder.GetFileAsync("myVideo.Mp4");
var text = await files.ReadAllTextAsync();
I am getting an exception: "Access denied" but I have already enabled the permission in android manifest
Beginning in Android 6.0 (API level 23), users grant permissions to apps while the app is running, not when they install the app. You should request permissions at runtime.
System permissions are divided into two categories, normal and dangerous:
Normal permissions do not directly risk the user's privacy. If your app lists a normal permission in its manifest, the system grants the permission automatically.
Dangerous permissions can give the app access to the user's confidential data. If you list a dangerous permission, the user has to explicitly give approval to your app during the runtime of the app.
java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider ... requires android.permission.READ_EXTERNAL_STORAGE
READ_EXTERNAL_STORAGE is categorized as Dangerous permissions, so you should check this permissions manually for API level 23 and above.
Update:
Here is an example that request permissions at runtime.
I'm testing my app on an emulator. I have an export function where I create and write to a file in the external storage's downloads directory. And I also have an import function where I read a file from the external storage's downloads directory.
From Android documentation:
If the device is running Android 5.1 or lower, or your app's target SDK is 22 or lower: If you list a dangerous permission in your manifest, the user has to grant the permission when they install the app; if they do not grant the permission, the system does not install the app at all.
If the device is running Android 6.0 or higher, and your app's target SDK is 23 or higher: The app has to list the permissions in the manifest, and it must request each dangerous permission it needs while the app is running. The user can grant or deny each permission, and the app can continue to run with limited capabilities even if the user denies a permission request.
My emulator is running on Android 6.0 and my app's target SDK is 25, therefore I must also request each dangerous permission it needs while the app is running. I did so for the export functionality and everything works properly. However, when I'm implementing the import function I didn't request a permission during runtime. And the strange thing is I'm still able to read from my external storage's permission without READ_EXTERNAL_STORAGE being requested and granted at runtime. READ_EXTERNAL_STORAGE is a dangerous permission according to this Android documentation .
To verify, I made sure to disable permissions before I started using the feature and after it is completed, I verified again that the permission still wasn't granted. Although I'm happy with the behaviour since it's working without me requesting permission at runtime, but according to the documentations I don't believe this behaviour is expected. That's why I will like to know what's causing this and to figure out the problem before I publish any changes for the app.
Here's a code snippet of my manifest:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
The code snippet where I pick a file to read:
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("text/*");
startActivityForResult(intent, GET_FILE_RESULT_CODE);
The code snippet where I read the file chosen from the code snippet above (exportFile is simply the URI from onActivityResult):
BufferedReader br;
try {
br = new BufferedReader(new InputStreamReader(context.getContentResolver().openInputStream(exportFile)));
String line;
// Skip first header line
br.readLine();
while ((line = br.readLine()) != null) {...}
Thanks!
There's a well explanation here,
READ_EXTERNAL_STORAGE
Provides protected read access to external storage. In Android 4.1 by
default all applications still have read access. This will be changed
in a future release to require that applications explicitly request
read access using this permission. If your application already
requests write access, it will automatically get read access as well.
There is a new developer option to turn on read access restriction,
for developers to test their applications against how Android will
behave in the future.
In short, READ_EXTERNAL_STORAGE only exists as of Jelly Bean (Level 16). So, unless you're using a Jelly Bean phone and set the developer option "Protect USB storage" it won't be a problem.
You know,Android Runtime Permissions are grouped, since you applied for WRITE_EXTERNAL_STORAGE permission in the manifest already, so there's no need to apply for READ_EXTERNAL_STORAGE permissions.Both of them are the same group.
I am developing an Android application in Android 6 and my application in a service needs to get device ID(getDeviceId). I have set android.permission.READ_PHONE_STATE in the manifest file, but at run time I got this error:
neither user 10632 nor current process has android.permission.READ_PHONE_STATE. java.lang.SecurityException:getDeviceId need android.permission.Read_Phone_state
I install my apk file using adb install myapk.apk and I suppose that all of application's required permissions are granted at install time.
You also need to request permission at run time.
int permissionCheck = ContextCompat.checkSelfPermission(thisActivity,
Manifest.permission.READ_PHONE_STATE);
If the app has the permission, the method returns PackageManager.PERMISSION_GRANTED, and the app can proceed with the operation. If the app does not have the permission, the method returns PERMISSION_DENIED, and the app has to explicitly ask the user for permission.
If you dont get it , you should request it
ActivityCompat.requestPermissions(thisActivity,
new String[]{Manifest.permission.READ_PHONE_STATE},
MY_PERMISSIONS_REQUEST_READ_PHONE_STATE);
You need to ask for permissions at runtime in android 6+. Visit android developer page to learn how to ask for permission for android M and above visit : https://developer.android.com/training/permissions/requesting.html