Android Program request permissions - android

I am trying to use GPS in android but it gives me this error:
I put in manifest these permission
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
can anyone help me please

As the hint suggests : The user may deny permission. In that case this call will throw error...
Right now, android asks for the user to accept all the permissions an app asks for in the manifest on installation. In the upcoming M release, android will switch over to the iOS style of permissions with an "on needed" basis.
Call this method to see if permission is granted or not. If not, you need to handle that situation.
context.checkCallingPermission(permission)
Declaring permission in manifest only means that you are requesting permission. In new releases it will not guarantee that user will give you that permission.
In older releases the user has to accept all or reject all permissions

This is not an error actually but a heads-up by the Lint and which may cause an issue!
Hope you are aware about the new permission model is introduced in Android 6.0 (Marshmallow), through which user may not permit to use GPS or Network or anything else and so it may cause an issue in your application!
Now, as per the lint analysis, so before implementing particular functionality, you should check whether permission for the same is available or not!

Since SDK 23, you should/need to check the permission using checkSelfPermission
http://developer.android.com/reference/android/support/v4/content/ContextCompat.html
for example
if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
&& checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}

This condition checks user allowed to access the permission to read the location
if(checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION)== PackageManager.PERMISSION_GRANTED||checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
manager.requestLocationUpdates(LocationManager.GPS_PROVIDER,meter,mill,new locationlist(this));
}

Related

Kotlin: App not asking user for permissions

I am creating an Android application that reads a user's SMS messages. I first check whether the user has granted permission for me to read the SMS messages with the if conditional. I have verified that my test phone has not granted access to the app to read the SMS messages, as the print statement is executed. However, the requestPermissions method is not triggered (there is no popup asking to grant permission to read the SMS messages). I suspect I might be using the wrong permission code or the wrong method to begin with. I have included the following permission in my Manifest.xml file:
<uses-permission android:name="android.permission.SEND_SMS"/>
Below is my Kotlin code:
// See if the user has not granted permission to read his or her text messages
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_SMS) == PackageManager.PERMISSION_DENIED) {
// Request the user to grant permission to read SMS messages
ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.READ_SMS), 2);
System.out.println("Permission Denied")
}
In AndroidManifest.xml add READ_SMS
permission.
Use
<uses-permission android:name="android.permission.READ_SMS"/>
Instead of
<uses-permission android:name="android.permission.SEND_SMS"/>
As it is mentioned in comments, You have declared SEND_SMS permission in Manifest.xml file and requesting READ_SMS permission dynamically(runtime).
Also it is not recommended to use this permission unless app acts as default messaging app. Please go through documentation Manifest.permission.READ_SMS which states following
This is a hard restricted permission which cannot be held by an app
until the installer on record whitelists the permission. For more
details see
PackageInstaller.SessionParams.setWhitelistedRestrictedPermissions(Set)

Permission not asked

I'd like to know why my permission are not asked when I'm launching my app, here's my manifest permissions :
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
And when I go through the param of my phone, I only have the "position" permission (and it's disabled).
If by permission not asked you mean that the user isn't being prompted to allow internet permission then that is normal. Internet is in the normal permissions list so it is auto granted. For more information about normal permissions take a look at: https://developer.android.com/guide/topics/permissions/normal-permissions.html
Also, adding permissions is a two step process; once you have declared the permission you need in your manifest, you will also have to do some setup in your java file. Take a look at https://developer.android.com/training/permissions/requesting
Additionally, if you are looking for easier ways to deal with permissions then there are libraries out there for that too such as RxPermissions: https://github.com/tbruyelle/RxPermissions
Hopefully this helps!
You should ask for a Runtime Permission
Please see the documentation:
Request App Permissions
If you are targeting SDK 26+, then you need to check for permissions in code like this:
if (ContextCompat.checkSelfPermission(thisActivity, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Permission is not granted
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity,
Manifest.permission.ACCESS_FINE_LOCATION)) {
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(thisActivity,
arrayOf(Manifest.permission.ACCESS_FINE_LOCATION),
MY_PERMISSIONS_ACCESS_FINE_LOCATION)
// MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
// app-defined int constant. The callback method gets the
// result of the request.
}
} else {
// Permission has already been granted - or running on old Android
}
It is described in Request App Permissions
for marshmallow(API 23) and above you should get permission for location, phone states and other dangerous permissions not only in your manifest but in your code (Run Time Permission).for other permissions, manifest is enough.
see this video
also you can find your solution in this Q&A

android ContextCompat.checkSelfPermission always returns PERMISSION_GRANTED

In my android application (minSdkVersion 15), i have to create directory and write files into it. In my AppManifest i am using :
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
Before creating directory or file, i am checking if permission is allowed or deny, as
boolean isAllow = ContextCompat.checkSelfPermission(this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED;
But it is always returning true or PERMISSION_GRANTED, even when someone set deny permission from Settings -> Apps -> Permissions
Why checkSelfPermission is always returning PERMISSION_GRANTED ? Is there any way to check if permission is denied ?
To invoke permission i have used :
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
But its not showing permission Dialogue??
In the new permission model permissions with protection level dangerous are runtime permissions. For apps targeting M and above the user may not grant such permissions or revoke them at any time. For apps targeting API lower than Marshmallow(<23) these permissions are always granted as such apps do not expect permission revocations and would crash. Therefore, when the user disables a permission for a legacy app in the UI the platform disables the APIs guarded by this permission making them a no-op which is doing nothing or returning an empty result or default error.
for more information visit PermissionChecker
For those who develop with Xamarin make sure that you explicitly set the targetSDK version >= 23 in your manifest.
Don't use automatic for your targetSDK!!!
if your targetSdkVersion is minimum 23 then your problem can be solved by code as below:
int permissionCheck = PermissionChecker.checkSelfPermission(getReactApplicationContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE);

Marshmallow FINE and COARSE location permission

I'm trying to access ACCESS_FINE_LOCATION and if it cannot be found access ACCESS_COARSE_LOCATION. So I request for those 2 permission, but they give me the same dialog asking for location permission. I know those are both in the same group but Google says:
Note: Your app still needs to explicitly request every permission it needs, even if the user has already granted another permission in the same group. In addition, the grouping of permissions into groups may change in future Android releases. Your code should not rely on the assumption that particular permissions are or are not in the same group.
This means I ask for those 2 permissions within a second, which results in 2 dialog in a row. THis does not seem very user friendly to me. Is there a better way?
You do not need ACCESS_COARSE_LOCATION permission when you define ACCESS_FINE_LOCATION permission.
From Android Documentation:
Requesting User Permissions
In order to receive location updates from NETWORK_PROVIDER or
GPS_PROVIDER, you must request user permission by declaring either the
ACCESS_COARSE_LOCATION or ACCESS_FINE_LOCATION permission,
respectively, in your Android manifest file. For example:
<manifest>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
.......
</manifest>
Without these permissions, your application will fail at runtime when
requesting location updates.
Note: If you are using both NETWORK_PROVIDER and GPS_PROVIDER, then
you need to request only the ACCESS_FINE_LOCATION permission, because
it includes permission for both providers. (Permission for
ACCESS_COARSE_LOCATION includes permission only for NETWORK_PROVIDER.)
Please look at https://developer.android.com/guide/topics/location/strategies.html
I have resolved the same problem.Try to give it runtime permission and Firstly check the manifest SDK version and if your version is greater than 6.0 or equal to 6.0 then you need to check permissions for your permission and pass permission Fine location only in request location then definitely it will work.
if you got stuck in code then you may ask for code I will update you but firstly go through these steps.
if you got success to perform your task then rate it.

Grant permission required for EXTERNAL_STORAGE in Android M?

Will the Android permissions WRITE_EXTERNAL_STORAGE and READ_EXTERNAL_STORAGE trigger the new grant permission dialog of Android M?
I agree with Guillaume Perrot 's answer. I have met the similar question when I write the permission of READ_WRITE_EXTERNAL_STORAGE in AndroidManifest.xml
with no permissions showing up in the app by default , people need to switch the toggle button of storage in the app permissions.Then I modify my targetSdkVersion in build.gradle to less than 23(MNC) and other number related with sdkVersion, the app installed with the permissions on.
The other way is to write requestpermission function in the place that you need the permisson. The code is as follow:
if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)==
PackageManager.PERMISSION_GRANTED) {
//do the things} else {
requestPermissions(new String[] { Manifest.permission.WRITE_EXTERNAL_STORAGE },
AnyNumber);
Because I have less than 15 reputation so I can't vote for the Guillaume Perrot 's answer.Just use this way to show my idea.
I solved add this if check version for Android M
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
requestPermissions(new String[]{android.Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
requestPermissions(new String[]{android.Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
}
My answer is based on my tests on M Preview SDK version 2, using an emulator.
If you target MNC preview API level, WRITE_EXTERNAL_STORAGE is not granted by default and will be part of the new dynamic permission API.
You will see the storage permission as a toggle button in the new app permissions menu in device settings, and you can use Activity.requestPermissions to show the popup for that permission.
However if you target api level < MNC, it won't be classified as a dangerous permission, and thus will be granted without a way for the user to disable it (not showing up in permission settings), and you will not be able to compile code using Activity.requestPermissions anyway as the preview SDK enforces minSdkVersion="MNC" to use the new APIs.
This is a different behavior than location permissions: whatever the API level you target, the user will be able to turn location off in permission menu.
For the permission menu itself, the permission toggle state is ON by default if:
Target API level < MNC.
Target API level = MNC but you upgrade app on device from a previous install where target API level was less than MNC.
Otherwise you will see the toggle as OFF by default.
Hope it helps.
According to the docs:
Limited Permissions Granted at Install Time: When the user installs or updates the app, the system grants the app all permissions that the app requests that fall under PROTECTION_NORMAL.
So because READ_EXTERNAL_STORAGE is falling under PROTECTION_NORMAL , it won't trigger the dialog.
But because the level of WRITE_EXTERNAL_STORAGE is PROTECTION_DANGEROUS, it will fall under this behavior as described in docs:
User Grants Permissions at Run-Time: When the app requests a permission, the system shows a dialog to the user, then calls the app's callback function to notify it whether the permission was granted. If a user grants a permission, the app is given all permissions in that permission's functional area that were declared in the app manifest
Here is the sources for the protection level:
detailed list
According to Android docs you don't need to request permission about read and write external storage.
Edit: in the latest Android M release you need to ask for both read and write permissions
Storage permission falls under dangerous protection level, So all the dangerous protection level permissions will not be granted at install time in Android M, if App target SDK is set to 23. They will be given at run time.
And yes these permissions can be revoked at run time also.
No permission dialog will not be triggered automatically, you need to do a request by using API such as requestPermissions() method to show that native dialog.
Please check the dangerous level permission list here

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