Develop Reference

Request write permissions on Android

Sorry, this question has probably been asked multiple times already, but I am struggling with different SDK versions. My app is used as a research instrument and solely installed per .apk directly on tablets, thus no app store. I need to record the answers from users and write them into a text file. And I am having a hard time requesting the permission from users to store the data on the external storage.
I added the following line to AndroidManifest.xml:
<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>
In the MainActivity, I call askForPermissions in the onCreate function:
public void askForPermissions() {
int result = ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (result != PackageManager.PERMISSION_GRANTED){
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
if (!Environment.isExternalStorageManager()) {
Intent intent = new Intent(Settings.ACTION_MANAGE_ALL_FILES_ACCESS_PERMISSION);
startActivity(intent);
}else{
//TODO no clue, what to do here
}
}else{
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)){
Toast.makeText(this, "Permission needed to store the data. Please allow storage functionality.", Toast.LENGTH_LONG).show();
} else {
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},2);
}
}
}
createDir();
}
In API version 30, I use the "Intend" and accordingly the settings screen with the permissions shows up and I can grant writing permissions manually - and this works (directory is generated, data stored ...). First questions: In which cases can it happen that there is no external storage manager (hence the TODO)?
What I am struggling with is SDK < 30. This does not seem to work. I do not get permissions and in the app info, I cannot give the app writing permissions manually. The permissions option is disabled. What is the correct way to request permissions in that case (most preferably directly in the app)?
Sorry for the possible double post. Newbie here.

Try this in manifest:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Android Read and Write Without Requesting Permission - Theta

i need permission read and write for my plugin, i try a lot of things.
In manifest
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
but not working after v23 according to others posts, so i try with requestPermission but my app crash and in real use case i don't have any interface.
I'm using RICOH THETA Plug-in SDK
I'm trying to use BitmapFactory and got this error
E/BitmapFactory: Unable to decode stream: java.io.FileNotFoundException: /storage/emulated/0/DCIM/100RICOH/R0010156.JPG (Permission denied)
If someone has any idea how to do it.
Thanks.

Don't worry. THETA Plug-in store grants all permission automatically on instal time. Users do not need to grant permissions manually in actual use case. You need to grant permissions manually only for development time.
The official document describes that
Declaration of Permissions
When installing from the RICOH THETA store, based on the protection level set in the manifest file, permission is automatically granted. During development, use an application that displays the screen such as Vysor, and grant permission from the application settings or from a plug-in dialog window.

You have to give permission manually in android 6 and above use dexter library
Link https://github.com/Karumi/Dexter

in first you should check android version
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED &&
ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED {
// do work
} else {
String[] permissions = new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE};
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
requestPermissions(permissions, 100);
}
}
} else {
// do work
}

Acuant SDK does't work with support v7 appcompat lib in android

When I did simple example it is working fine but if I add support v7 appcompat lib, it is crashing on opening camera on marshmello,Nought.
But it works in android Lollipop few devices and crashed in Marshmallow and Nougat .
Any one used this library, can you help me to fix it.

You have to get Runtime permission to use the camera on after Marshmellow devices.
First check if the user grant the permission:
if (ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED)
Then, you could use this to request to the user:
ActivityCompat.requestPermissions(activity, new String[] {Manifest.permission.CAMERA}, requestCode);
And in marshmallow it appears the dialog
Know more about permission here: https://developer.android.com/training/permissions/requesting.html

How do I show permissions rationale for multiple permissions request?

I am working with Android API 25 and need to make permissions requests in the app.
There are a ton of code samples on how to make a request as well as how to show the rationale. This link here shows a simple methodology as do these: Android M Request Multiple permission at a single time , Android M request permission non activity
The problem I am having is I am requesting multiple permissions at once (Location, Write storage access, and Contacts) and the ActivityCompatApi23.shouldShowRequestPermissionRationale source code only takes in a String for a single permission and not an array for multiple permissions. (source: android.support.v4.app.ActivityCompat)
So in my code, I can do this:
ActivityCompat.requestPermissions(activity, permissionsStringArray, 123);
And try to request multiple at once, but I can't then show the explanation for the ones needed if they return true from:
ActivityCompat.shouldShowRequestPermissionRationale(activity,
currentPerm.getPermissionManifestName()
Does anyone have any recommendations on how I can show a dialog that includes multiple rationales in it as opposed to one at a time?

I recommend this open source.
https://github.com/ParkSangGwon/TedPermission
You can use simply. for example
private void CheckPermission() {
new TedPermission(this)
.setPermissionListener(permissionlistener)
.setDeniedMessage(getString(R.string.str_permission1))
.setPermissions(Manifest.permission.CAMERA, android.Manifest.permission.READ_PHONE_STATE, Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE)
.check();
}

Marshmallow - Google Maps Runtime permission issue

I'm using the Google location API to show the users location on the map.
When the app loads for the first time, rationale dialog is displayed explaining why user needs to enable access to location. Then, runtime permission dialog is shown, and users clicks “Allow” to enable location access. The Map then loads fine without any crashes.
However, when the app resumes (after going into background), no rationale dialog appears since user has already granted location access. In this scenario, only the runtime permission dialog appears. Now if the user clicks “Deny”, the app crashes. This code works fine in Android versions below M (Lollipop, Jellybean, KitKat etc.)
Is there a way to handle the runtime exception at this stage?
The error is :
java.lang.SecurityException: Client must have ACCESS_FINE_LOCATION
permission to request PRIORITY_HIGH_ACCURACY locations.
I'm using the standard Sample MyLocation demo app without any 3rd party library:
GoogleMaps MapDemo on Github
I've also tried using the PermissionsDispatcher Library, but the same errors persist.
PermissionDispatcher Android-Google-Maps-Demo
private void enableMyLocation() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Permission to access the location is missing.
PermissionUtils.requestPermission(this, LOCATION_PERMISSION_REQUEST_CODE,
Manifest.permission.ACCESS_FINE_LOCATION, true);
} else if (mMap != null) {
// Access to the location has been granted to the app.
mMap.setMyLocationEnabled(true);
}
}
Any help is highly appreciated.

Make sure about that you have add right permission in your Manifest files about what permission you are asking and needed exactly
And may be problem with your code.
Try this library: RuntimePermission Library
To ask permission manually.