I'm working on an android project that requires location permission. I followed the documentation and everything works fine for the permission itself. But my app heavily depends on that permission so nothing will work if not granted. anyway, my problem is that I have a function that requests the permission as follows (knowing that the function hasPermission() just checks if permission was granted before or not):
public void requestPermission() {
if(!hasPermission()){
ActivityCompat.requestPermissions(MainActivity.this, new String[] {ACCESS_FINE_LOCATION}, REQUEST_CODE);
Toast.makeText(this, "Here", Toast.LENGTH_SHORT).show();
}
}
I handled my onRequestPermissionsResult as follows :
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions,
#NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == REQUEST_CODE) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this, "Location Permission Granted", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "Location Permission Denied", Toast.LENGTH_SHORT).show();
}
}
}
and my onCreate() is :
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
requestPermission();
Toast.makeText(this, "In main", Toast.LENGTH_SHORT).show();
}
How can I make the Toast in my onCreate() method wait until the user finishes from choosing from the permission dialog box, because if I directly try to use my hasPermission() function it will check even before the user chooses?
------------------------Edit----------------------------------
the onRequestPermissionsResult is deprecated so i used this :
private ActivityResultLauncher<String> permission = registerForActivityResult(new ActivityResultContracts.RequestPermission(), result -> {
if(result){
Toast.makeText(this, "Granted", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "Denied", Toast.LENGTH_SHORT).show();
}
});
and my onCreate() :
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
permission.launch(Manifest.permission.ACCESS_FINE_LOCATION);
Toast.makeText(this, "In main", Toast.LENGTH_SHORT).show();
}
and still the toast after permission. launch() ran before completing the permission dialog box.
how can i make the Toast in my onCreate() method wait until the user finish from choosing from the permission dialog box
This is normal because requesting the permission takes some time to check if the system already granted this permission to my app or not. And this is done asynchronously; so the onCreate() will go ahead and continue executing by showing the Toast and returning.
Generally speaking, you shouldn't seize the main thread in Android to avoid Application Not Responding (ANR); so, pausing the onCreate() until it checks there is a granted permission or not will cause ANR.
until the user finish from choosing
How could we know that the user will immediately choose an option or waits one hour later on?
So, the right way to do this is in the ActivityResultLauncher callback which waits for the user reaction asynchronously:
private ActivityResultLauncher<String> permission = registerForActivityResult(new ActivityResultContracts.RequestPermission(), result -> {
if(result){
Toast.makeText(this, "Granted", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "Denied", Toast.LENGTH_SHORT).show();
}
// The permission dialog gone; show the Toast
Toast.makeText(this, "In main", Toast.LENGTH_SHORT).show();
});
Or probably you can fire another listener callback or update a LiveData object. But all this will also go in the ActivityResultLauncher callback.
I've read all the relevant questions and answers, but I still can not open a file for writing with FileOutputStream. When I call
FileOutputStream fos = new FileOutputStream(newpathandfilename);
It throws a FileNotFoundException
What I did so far:
AndroidManifest.xml has:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" tools:remove="android:maxSdkVersion"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" tools:remove="android:maxSdkVersion"/>
Also application tag has android:requestLegacyExternalStorage set to true.
At runtime I check the permission:
private void showExplanation(String title,
String message,
final String permission,
final int permissionRequestCode) {
AlertDialog.Builder builder = new AlertDialog.Builder(this.getContext());
builder.setTitle(title)
.setMessage(message)
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
requestPermission(permission, permissionRequestCode);
}
});
builder.create().show();
}
private void requestPermission(String permissionName, int permissionRequestCode) {
ActivityCompat.requestPermissions(this.getActivity(),
new String[]{permissionName}, permissionRequestCode);
}
#Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case 1: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// contacts-related task you need to do.
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(this.getActivity(), "Permission denied to read your External storage", Toast.LENGTH_SHORT).show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
Then:
if (ActivityCompat.checkSelfPermission(this.getContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
Log.d("Granted","Granted");
} else {
if (ActivityCompat.shouldShowRequestPermissionRationale(this.getActivity(),
Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
showExplanation("Permission required", "Permission required", Manifest.permission.WRITE_EXTERNAL_STORAGE, 1);
} else {
requestPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE, 1);
}
}
It writes the access is granted already.
The path is /storage/emulated/0/myApp/NewFile20220520_222112.jpg.
The exception is: open failed: EPERM (Operation not permitted)
compileSdkVersion 30
targetSdkVersion 30
Device: API level 30
Any idea what is missing?
I am new in android and was trying to test something. I have this simple app, where I just want to read files from any android folder. Till now, I just checked how the paths are there which I came to know from the following
context.getExternalFilesDir(null);
&
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM)
The paths obtained are like
/storage/emulated/0/ then rest of the folders
I have done everything, asked for permission in the manifest file, and in the app too. I check that even though the permission is granted and folder path is also correct but the File.listFiles() is givingme null pointer exception.
Please take a look at the code below:
Permission in manfest file
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
Code to get permission and try checking the files
if(ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED){
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},101);
Toast.makeText(getApplicationContext(),
"No permission yet",
Toast.LENGTH_SHORT).show();
}
else{
Toast.makeText(getApplicationContext(),
"Permission already granted",
Toast.LENGTH_SHORT).show();
File dcimPath = new File("/storage/emulated/0/bluetooth"); //This path is correct
File[] files = dcimPath.listFiles(); // gives null pointer exception
Log.i("files length ",files.length+"");
}
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if(requestCode == 101){
if(grantResults[0] == PackageManager.PERMISSION_GRANTED){
Toast.makeText(getApplicationContext(),
"Permission granted",
Toast.LENGTH_SHORT).show();
File dcimPath = new File("/storage/emulated/0/bluetooth/");
File[] files = dcimPath.listFiles(); //gives error
Log.i("files length ",files.length+"");
}
else{
Toast.makeText(getApplicationContext(),
"Permission denied",
Toast.LENGTH_SHORT).show();
}
}
}
ERROR
Caused by: java.lang.NullPointerException: Attempt to get length of null array
Try adding this line to the Android Manifest File
android:requestLegacyExternalStorage="true"
This is used to read Shared Storage apart from the app's private storage. Read this if you are curious to know more...
Hope this helps. Feel free to ask for clarifications...
In my android app. When someone tries to download file, it should ask for storage permission.. if granted, it should start downloading the file.
Next time if permission already granted, just start new download.
here is the part of my code...
public void downloadFile(String url) {
Uri source = Uri.parse(url);
// Make a new request pointing to the download url
DownloadManager.Request request = new DownloadManager.Request(source);
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
String fileExtension = MimeTypeMap.getFileExtensionFromUrl(url);
String fileName = URLUtil.guessFileName(url, null, fileExtension);
// save the file in the "Downloads" folder of SDCARD
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
// get download service and enqueue file
DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
manager.enqueue(request);
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.contains("?dl=1")) {
if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
== PackageManager.PERMISSION_GRANTED) {
downloadFile(url);
} else {
ActivityCompat.requestPermissions(MainActivity.this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
REQUEST_WRITE_EXTERNAL_STORAGE);
}
return true;
}
The problem with this code is:
When user deny the permission app crashes.
When user allow the permission for the first, time the download doesn't start immediately... user need to click again on the download link.
You need to implement the callback function ActivityCompat.OnRequestPermissionsResultCallback.
So first step is to change your class signature to something like this but be careful to extend the Activity that you need the permission results in, MainActivity is just an example:
public class MainActivity extends AppCompatActivity
implements ActivityCompat.OnRequestPermissionsResultCallback
Second step is to override the following function:
public void onRequestPermissionsResult(int requestCode, String[] permissions,
int[] grantResults) {
if( requestCode == REQUEST_WRITE_EXTERNAL_STORAGE)
{
if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
//Do something if the permission is granted
}
else
{
//Do something if the permission denied
}
}
}
Your shouldOverrideUrlLoading method always returns true. Is that the wanted behavior?
Try to add a permission request response code as below:
#Override
public void onRequestPermissionsResult(int requestCode, String permissions[],
int[] grantResults) {
switch (requestCode) {
case REQUEST_WRITE_EXTERNAL_STORAGE: {
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// do your work
} else {
// permission denied
}
return;
}
}
}
Source: http://developer.android.com/training/permissions/requesting.html#perm-request
I am testing my app on Marshmallow 6.0 and it's getting force closed for the android.permission.READ_EXTERNAL_STORAGE, even if it is defined in the Manifest already. Somewhere I have read that if I request permission at runtime then it would not force close your application. I have read this android document also, which is for requesting runtime permission.
So, I came to know that we can request a permission like below which is mentioned in the android document.
// Here, thisActivity is the current activity
if (ContextCompat.checkSelfPermission(thisActivity,
Manifest.permission.READ_CONTACTS)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity,
Manifest.permission.READ_CONTACTS)) {
// Show an expanation 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,
new String[]{Manifest.permission.READ_CONTACTS},
MY_PERMISSIONS_REQUEST_READ_CONTACTS);
// MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
// app-defined int constant. The callback method gets the
// result of the request.
}
}
The above code has a callback method onRequestPermissionsResult which gets the result.
#Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
}
}
My question is where to exactly request the permission to user? Should we use the requesting permission at start of the app or should we do it as when the permission is required?
This is worked for me !!!
In Your Splash Activity of your application do the following,
1) Declare an int variable for request code,
private static final int REQUEST_CODE_PERMISSION = 2;
2) Declare a string array with the number of permissions you need,
String[] mPermission = {Manifest.permission.READ_CONTACTS, Manifest.permission.READ_SMS,
Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.WRITE_EXTERNAL_STORAGE};
3) Next Check the condition for runtime permission on your onCreate method,
try {
if (ActivityCompat.checkSelfPermission(this, mPermission[0])
!= MockPackageManager.PERMISSION_GRANTED ||
ActivityCompat.checkSelfPermission(this, mPermission[1])
!= MockPackageManager.PERMISSION_GRANTED ||
ActivityCompat.checkSelfPermission(this, mPermission[2])
!= MockPackageManager.PERMISSION_GRANTED ||
ActivityCompat.checkSelfPermission(this, mPermission[3])
!= MockPackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,
mPermission, REQUEST_CODE_PERMISSION);
// If any permission aboe not allowed by user, this condition will execute every tim, else your else part will work
}
} catch (Exception e) {
e.printStackTrace();
}
4) Now Declare onRequestPermissionsResult method to check the request code,
#Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
Log.e("Req Code", "" + requestCode);
if (requestCode == REQUEST_CODE_PERMISSION) {
if (grantResults.length == 4 &&
grantResults[0] == MockPackageManager.PERMISSION_GRANTED &&
grantResults[1] == MockPackageManager.PERMISSION_GRANTED &&
grantResults[2] == MockPackageManager.PERMISSION_GRANTED &&
grantResults[3] == MockPackageManager.PERMISSION_GRANTED) {
// Success Stuff here
}
}
}
Do like this
private static final int REQUEST_ACCESS_FINE_LOCATION = 111;
In your onCreate
boolean hasPermissionLocation = (ContextCompat.checkSelfPermission(getApplicationContext(),
Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED);
if (!hasPermissionLocation) {
ActivityCompat.requestPermissions(ThisActivity.this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
REQUEST_ACCESS_FINE_LOCATION);
}
then check result
#Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode)
{
case REQUEST_ACCESS_FINE_LOCATION: {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
{
Toast.makeText(ThisActivity.this, "Permission granted.", Toast.LENGTH_SHORT).show();
//reload my activity with permission granted
finish();
startActivity(getIntent());
} else
{
Toast.makeText(ThisActivity.this, "The app was not allowed to get your location. Hence, it cannot function properly. Please consider granting it this permission", Toast.LENGTH_LONG).show();
}
}
}
}
In general, request needed permissions it as soon as you need them. This way you can inform the user why you need the permission and handle permission denies much easier.
Think of scenarios where the user revokes the permission while your app runs: If you request it at startup and never check it later this could lead to unexpected behaviour or exceptions.
In my opinion, there is no one correct answer to your question. I strongly suggest you to look at this official permissions patterns page.
Couple of things suggested by Google :
"Your permissions strategy depends on the clarity and importance of the permission type you are requesting. These patterns offer different ways of introducing permissions to the user."
"Critical permissions should be requested up-front. Secondary permissions may be requested in-context."
"Permissions that are less clear should provide education about what the permission involves, whether done up-front or in context."
This illustration might give you better understanding.
Maybe the most crucial thing here is that whether you ask the permission up-front or in the context, you should always keep in mind that these permissions can be revoked anytime by the user (e.g. your app is still running, in background).
You should make sure that your app doesn't crash just because you asked the permission on the very beginning of the app and assumed that user didn't change his/her preference about that permission.
For requesting runtime permission i use GitHub Library
Add library in Build.gradle file
dependencies {
compile 'gun0912.ted:tedpermission:1.0.3'
}
Create Activity and add PermissionListener
public class MainActivity extends AppCompatActivity{
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
PermissionListener permissionlistener = new PermissionListener() {
#Override
public void onPermissionGranted() {
Toast.makeText(RationaleDenyActivity.this, "Permission Granted", Toast.LENGTH_SHORT).show();
//Camera Intent and access Location logic here
}
#Override
public void onPermissionDenied(ArrayList<String> deniedPermissions) {
Toast.makeText(RationaleDenyActivity.this, "Permission Denied\n" + deniedPermissions.toString(), Toast.LENGTH_SHORT).show();
}
};
new TedPermission(this)
.setPermissionListener(permissionlistener)
.setRationaleTitle(R.string.rationale_title)
.setRationaleMessage(R.string.rationale_message) // "we need permission for access camera and find your location"
.setDeniedTitle("Permission denied")
.setDeniedMessage("If you reject permission,you can not use this service\n\nPlease turn on permissions at [Setting] > [Permission]")
.setGotoSettingButtonText("Settings")
.setPermissions(Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE)
.check();
}
}
string.xml
<resources>
<string name="rationale_title">Permission required</string>
<string name="rationale_message">we need permission for read <b>camera</b> and find your <b>location</b></string>
</resources>
Android Easy Runtime Permissions with Dexter:
1. Dexter Permissions Library
To get started with Dexter, add the dependency in your build.gradle
dependencies {
// Dexter runtime permissions
implementation 'com.karumi:dexter:4.2.0'
}
1.1 Requesting Single Permission
To request a single permission, you can use withPermission() method by passing the required permission. You also need a PermissionListener callback to receive the state of the permission.
> onPermissionGranted() will be called once the permission is granted.
> onPermissionDenied() will be called when the permission is denied. Here you can check whether the permission is permanently denied by using response.isPermanentlyDenied() condition.
The below code requests CAMERA permission.
Dexter.withActivity(this)
.withPermission(Manifest.permission.CAMERA)
.withListener(new PermissionListener() {
#Override
public void onPermissionGranted(PermissionGrantedResponse response) {
// permission is granted, open the camera
}
#Override
public void onPermissionDenied(PermissionDeniedResponse response) {
// check for permanent denial of permission
if (response.isPermanentlyDenied()) {
// navigate user to app settings
}
}
#Override
public void onPermissionRationaleShouldBeShown(PermissionRequest permission, PermissionToken token) {
token.continuePermissionRequest();
}
}).check();
1.2 Requesting Multiple Permissions
To request multiple permissions at the same time, you can use withPermissions() method. Below code requests STORAGE and LOCATION permissions.
Dexter.withActivity(this)
.withPermissions(
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE,
Manifest.permission.ACCESS_FINE_LOCATION)
.withListener(new MultiplePermissionsListener() {
#Override
public void onPermissionsChecked(MultiplePermissionsReport report) {
// check if all permissions are granted
if (report.areAllPermissionsGranted()) {
// do you work now
}
// check for permanent denial of any permission
if (report.isAnyPermissionPermanentlyDenied()) {
// permission is denied permenantly, navigate user to app settings
}
}
#Override
public void onPermissionRationaleShouldBeShown(List<PermissionRequest> permissions, PermissionToken token) {
token.continuePermissionRequest();
}
})
.onSameThread()
.check();
A good explanation and HowTo can be found here:
https://inthecheesefactory.com/blog/things-you-need-to-know-about-android-m-permission-developer-edition/en
I wrote this code to check and request the permissions at runtime in a BaseActivity.class which is parent of every other Activity.class I implemented:
public static final int PERMISSION_REQUEST = 42;
public static final int MULTIPLE_PERMISSION_REQUEST = 43;
//Marshmallow Permission Model
public boolean requestPermission(String permission /* Manifest.permission...*/) {
if (ContextCompat.checkSelfPermission(this,
permission) != PackageManager.PERMISSION_GRANTED) {
if (Utils.hasMarshmallow())
ActivityCompat.requestPermissions(this,
new String[]{permission}, PERMISSION_REQUEST
);
else {
requestPermissions(new String[]{permission},
PERMISSION_REQUEST);
}
return false;
} else {
return true;
}
}
public boolean requestPermission(String... permissions) {
final List<String> permissionsList = new ArrayList<String>();
for (String perm : permissions) {
addPermission(permissionsList, perm);
}
if (permissionsList.size() > 0) {
if (Utils.hasMarshmallow())
requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
MULTIPLE_PERMISSION_REQUEST);
else
ActivityCompat.requestPermissions(this, permissionsList.toArray(new String[permissionsList.size()]),
MULTIPLE_PERMISSION_REQUEST);
return false;
} else
return true;
}
private boolean addPermission(List<String> permissionsList, String permission) {
if (ContextCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED) {
permissionsList.add(permission);
// Check for Rationale Option
if (Utils.hasMarshmallow())
if (!shouldShowRequestPermissionRationale(permission))
return false;
}
return true;
}
#Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case PERMISSION_REQUEST:
case MULTIPLE_PERMISSION_REQUEST: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// contacts-related task you need to do.
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
Simply example call:
activity.requestPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE);
Return result will let you know if the permission is already granted or not.
calling this function we can allow user to open dialog for asking permission to allow camera and record Audio.
if ( ActivityCompat.shouldShowRequestPermissionRationale (this, Manifest.permission.CAMERA) ||
ActivityCompat.shouldShowRequestPermissionRationale (this,
Manifest.permission.RECORD_AUDIO) ) {
Toast.makeText (this,
R.string.permissions_needed,
Toast.LENGTH_LONG).show ();
} else {
ActivityCompat.requestPermissions (
this,
new String[]{Manifest.permission.CAMERA, Manifest.permission.RECORD_AUDIO},
CAMERA_MIC_PERMISSION_REQUEST_CODE);
}
https://material.io/guidelines/patterns/permissions.html
This link will give you different type of scenario where permissions can be asked. Choose accordingly to your needs.
I like short code. I use RxPermission for permissions.
RxPermission is best library, which makes permission code unexpected just 1 line.
RxPermissions rxPermissions = new RxPermissions(this);
rxPermissions
.request(Manifest.permission.CAMERA,
Manifest.permission.READ_PHONE_STATE) // ask single or multiple permission once
.subscribe(granted -> {
if (granted) {
// All requested permissions are granted
} else {
// At least one permission is denied
}
});
add in your build.gradle
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
dependencies {
implementation 'com.github.tbruyelle:rxpermissions:0.10.1'
implementation 'com.jakewharton.rxbinding2:rxbinding:2.1.1'
}
Isn't this easy?
if ( ActivityCompat.shouldShowRequestPermissionRationale (this, Manifest.permission.CAMERA) ||
ActivityCompat.shouldShowRequestPermissionRationale (this,
Manifest.permission.RECORD_AUDIO) ) {
Toast.makeText (this,
R.string.permissions_needed,
Toast.LENGTH_LONG).show ();
} else {
ActivityCompat.requestPermissions (
this,
new String[]{Manifest.permission.CAMERA, Manifest.permission.RECORD_AUDIO},
CAMERA_MIC_PERMISSION_REQUEST_CODE);
}