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.
Related
I am working on this project for an app that can capture an image and then perform Text Recognition on the image using Google ML Toolkit. It is for my personal use only so I don't really care about "respecting the user's choice not to allow permissions", if I could I would ask them all at startup instead of asking when I need them.
Right now I basically request Camera Access at startup (which works fine) and then I show the camera feed to the user in the center of the screen. Then, the user can click on a "capture" button in order to capture the current frame and save it to a certain path. Then, I would like to decode the file in that path into bitmap format, display it to the user and then use the ML Toolkit.
However, I get an error, which I think is a permission error from the READ_EXTERNAL_STORAGE permission. Since the error I get says "Unable to decode stream: java.io.FileNotFoundException: /mnt/sdcard/Pictures/CameraXPhotos/1642088145797.jpg: open failed: EACCES (Permission denied)"
From what I understood I have to manually request permissions. From Android Developers it is stated that: "Any app that declares the WRITE_EXTERNAL_STORAGE permission is implicitly granted this (READ_EXTERNAL_STORAGE) permission." So I theoretically just need to ask for the WRITE_EXTERNAL_STORAGE permission. So I do the following:
onCreate{
button_capture.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v)
{
checkPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE, STORAGE_WRITE_PERMISSION_CODE);
capturePhoto();
}
});
}
public void checkPermission(String permission, int requestCode){
if (ContextCompat.checkSelfPermission(MainActivity.this, permission) == PackageManager.PERMISSION_DENIED) {
// Requesting the permission
ActivityCompat.requestPermissions(MainActivity.this, new String[] { permission }, requestCode);
}
else {
Toast.makeText(MainActivity.this, "Permission already granted", Toast.LENGTH_SHORT).show();
}
}
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults){
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == CAMERA_PERMISSION_CODE) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Toast.makeText(MainActivity.this, "Camera Permission Granted", Toast.LENGTH_SHORT) .show();
} else {
Toast.makeText(MainActivity.this, "Camera Permission Denied", Toast.LENGTH_SHORT) .show();
}
}
else if (requestCode == STORAGE_WRITE_PERMISSION_CODE) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Toast.makeText(MainActivity.this, "Storage Permission Granted", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, "Storage Permission Denied", Toast.LENGTH_SHORT).show();
}
}
}
But once I click on the capture button, it doesn't ask for permissions and crashes with the error "open failed: EACCES (Permission denied)" because of the line in my code in the capturePhoto() method where I try to open a file from its absolute path. I don't really understand why, with methods checkPermission() and onRequestPermissionsResult() I am handling permissions correctly right?
Is it because the capturePhoto() method runs in parallel of the checkPermissions() method and therefore does not wait for the permissions to be given?
I hope my issue is understanble, this is my first question so if I did anything wrong in my question feel free to point it out to me!
Could it be that it is because in my checkPermission() method I check if the permission was denied but not if it was not granted in the first place?
EDIT: Thank you for your comments #blackapps. The code that lets the user capture a picture is the following:
private void capturePhoto() {
File photoDir = new File("/mnt/sdcard/Pictures/CameraXPhotos");
if(!photoDir.exists())
photoDir.mkdir();
Date date = new Date();
String timestamp = String.valueOf(date.getTime());
String photoFilePath = photoDir.getAbsolutePath() + "/" + timestamp + ".jpg";
File photoFile = new File(photoFilePath);
imageCapture.takePicture(
new ImageCapture.OutputFileOptions.Builder(photoFile).build(),
getExecutor(),
new ImageCapture.OnImageSavedCallback() {
#Override
public void onImageSaved(#NonNull ImageCapture.OutputFileResults outputFileResults) {
Toast.makeText(MainActivity.this, "Photo has been taken", Toast.LENGTH_SHORT).show();
}
#Override
public void onError(#NonNull ImageCaptureException exception) {
Toast.makeText(MainActivity.this, "Error taking photo: " + exception.getMessage(), Toast.LENGTH_SHORT).show();
}
}
);
Bitmap bitmap = BitmapFactory.decodeFile(photoFile.getAbsolutePath());
getTextFromImage(bitmap);
image_result.setImageBitmap(bitmap);
// return photoFilePath;
}
So I'm new to Android development and have a basic application that writes to a text file on it's first time loading. But because it is the application's first time loading it must first ask the user for read/write permissions. The problem I have is that the application tries to write the file before it has these permissions. I have the following MainActivity.java class that contains the section of code that requests for permissions:
public class MainActivity extends Activity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Stes fullscreen and removes title
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
requestWindowFeature(Window.FEATURE_NO_TITLE);
if(ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 0);
setContentView(new Environment(this));
}
}
The constructor for Environment.jar then calls a function that writes the file if it does not yet exist.
But it seems that while the application does request permissions, it doesn't wait to receive these permissions before starting again. Is there any way to get it to wait to recieve the permissions, and if the permissions are not received to close the application?
You should call your Environment constructor only if the Permission is granted. Otherwise you can show an error dialog asking user to first grant permission before proceeding with the app. To check for permission You should request for permission as below -
Bool isPermissionGiven = false;
if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
== PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission. READ_EXTERNAL_STORAGE)
== PackageManager.PERMISSION_GRANTED) {
Log.v(TAG,"Permission is granted");
isPermissionGiven = true;
} else {
Log.v(TAG,"Permission is revoked");
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
isPermissionGiven = false;
}
if (isPermissionGiven){
new Environment(this)
}
Then implement onRequestPermissionsResult
#Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case 0:
boolean isPerpermissionForAllGranted = false;
if (grantResults.length > 0 && permissions.length==grantResults.length) {
for (int i = 0; i < permissions.length; i++){
if (grantResults[i] == PackageManager.PERMISSION_GRANTED){
isPerpermissionForAllGranted=true;
}else{
isPerpermissionForAllGranted=false;
}
}
Log.e("value", "Permission Granted, Now you can use local drive .");
} else {
isPerpermissionForAllGranted=true;
Log.e("value", "Permission Denied, You cannot use local drive .");
}
if(isPerpermissionForAllGranted){
// Do your work here
new Environment(this);
}
break;
}
}
you should implment onRequestPermissionsResult() method
more here https://developer.android.com/training/permissions/requesting.html
Also its a violation of the android rules to terminate the app like that. You should just print something like this app requires this permission to run. Or whatever you want to say and do nothing more if you want but don't terminate the app.
Also be prepared to launch the app no matter what. You can stick in place holder text while you wait like "loading..." and on a successful result update the text.
In API >= 23, we are required to ask users for permission at run-time. But for some reason, the permissions are causing onResume to be called infinitely. What causes this?
#Override
protected void onResume() {
super.onResume();
ActivityCompat.requestPermissions(MainActivity.this,
new String[]{Manifest.permission.ANYPERMISSION},1);
}
#Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
}
When you show dialog of permission question, Acitvity goes to onPause, and when dialog hides, it goes to onResume. You have to change place of asking of permission.
A small piece of code for permissions to complete previous response :)
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (Build.VERSION.SDK_INT >= 23)
ensurePermissions(
Manifest.permission.GET_ACCOUNTS,
Manifest.permission.WRITE_EXTERNAL_STORAGE
);
}
and:
#TargetApi(23)
private void ensurePermissions(String... permissions) {
boolean request = false;
for (String permission : permissions)
if (checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED) {
request = true;
break;
}
if (request) {
requestPermissions(permissions, REQUEST_CODE_PERMISSION);
}
}
first, your app needs to check whether you have been granted a particular permission before asking runtime permission.
if (ContextCompat.checkSelfPermission(this.getApplicationContext(),
android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
} else {
ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_CODE);
}
Could explain me plaese how i should explain to user permission
i work with Camera2API and i implement such snippet of code to ask permishion dinamicly
private void openCamera(int width, int height) {
setUpCameraOutputs(width, height);
CameraHelper.configureTransform(width, height, textureView, previewSize, getActivity());
CameraManager manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
try {
if (!cameraOpenCloseLock.tryAcquire(2500, TimeUnit.MILLISECONDS)) {
throw new RuntimeException("Time out waiting to lock camera opening.");
}
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) !=
PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)) {
// 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(
getActivity(), new String[]{android.Manifest.permission.CAMERA},
MY_PERMISSIONS_REQUEST);
// MY_PERMISSIONS_REQUEST is an
// app-defined int constant. The callback method gets the
// result of the request.
}
}
manager.openCamera(mCameraId, mStateCallback, mBackgroundHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
} catch (InterruptedException e) {
throw new RuntimeException("Interrupted while trying to lock camera opening.", e);
}
}
according to google docks i should check if user deny permission before
there is method which return true of false
shouldShowRequestPermissionRationale();
and according google
This method returns true if the app has requested this permission previously and the user denied the request.
if i understand correctly according google comments inside this method implementation
// 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.
And finally for example user deny my permission before and next time when he go to my screen with camera app should create the my castom pop-up with explanation "Please agree this permishion if you want to continue" and for example user agree this time and i should recall this method again according this
// sees the explanation, try again to request the permission.
but this method
shouldShowRequestPermissionRationale();
return to me true again, because it didn't know about the user intent to agree with permission.
Could you explain me please how to make it properly way? Maybe you have example?
Eventually i find a solution with help of #nuuneoi, thanks a lot!
And implement it like this
public void camera(View view) {
toCamera();
}
private void toCamera() {
if (!isCheckPermission()){
return;
}
if (isProcessWasFinish()) {
startActivity(new Intent(getApplicationContext(), CameraActivity.class));
overridePendingTransition(R.anim.open_next, R.anim.close_main);
} else {
startActivity(new Intent(getApplicationContext(), UserDataScreen.class));
overridePendingTransition(R.anim.open_next, R.anim.close_main);
}
}
private boolean isCheckPermission() {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) !=
PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)) {
showMessageOKCancel("You need to allow access to Camera");
return false;
}
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.CAMERA},
MY_PERMISSIONS_REQUEST);
return false;
// MY_PERMISSIONS_REQUEST is an
// app-defined int constant. The callback method gets the
// result of the request.
}
return true;
}
private void showMessageOKCancel(String message) {
new AlertDialog.Builder(MainActivity.this)
.setMessage(message)
.setPositiveButton("OK", listener)
.setNegativeButton("Cancel", listener)
.create()
.show();
}
DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener() {
final int BUTTON_NEGATIVE = -2;
final int BUTTON_POSITIVE = -1;
#Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case BUTTON_NEGATIVE:
// int which = -2
dialog.dismiss();
break;
case BUTTON_POSITIVE:
// int which = -1
ActivityCompat.requestPermissions(
MainActivity.this, new String[]{android.Manifest.permission.CAMERA},
MY_PERMISSIONS_REQUEST);
dialog.dismiss();
break;
}
}
};
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions,
#NonNull int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Log.e(MY_LOG, "Camera permission Granted");
// permission was granted, yay! Do the
// contacts-related task you need to do.
toCamera();
} else {
Log.e(MY_LOG, "Camera permission Denied");
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
}
default: {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
// other 'case' lines to check for other
// permissions this app might request
}
}
Hey you can use some of the libraries that are great for asking user permissions on app launch.
There's a great library to help you do that in Android :
Github link for the Permission dispatcher library
You can find the usage examples of the permission dispatcher library here
You can also check these libraries :
App-Runtime-Permissions-Android
Assent
MarshmallowPermissionManager
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);
}