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 have a weird bug, I have an app that registers a Brodcast whenever I call to a number it pops up a webpage.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
registerBrodcasts();
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_CALL_LOG) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{Manifest.permission.CALL_PHONE, Manifest.permission.READ_CALL_LOG},
MY_PERMISSIONS_REQUEST);
} else {
Toast.makeText(this, "Brodcast registered.", Toast.LENGTH_SHORT).show();
finish();
}
}
private void registerBrodcasts(){
IntentFilter filter = new IntentFilter();
filter.addAction("android.intent.action.NEW_OUTGOING_CALL");
registerReceiver(new CallReceiver(), filter);
}
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == MY_PERMISSIONS_REQUEST) {
if (grantResults.length > 0) {
boolean phoneLogsPermission = grantResults[1] == PackageManager.PERMISSION_GRANTED;
boolean phoneCallPermision = grantResults[0] == PackageManager.PERMISSION_GRANTED;
if (phoneLogsPermission && phoneCallPermision) {
Toast.makeText(this, "Permissions granted, we can call now.", Toast.LENGTH_SHORT).show();
finish();
} else {
Toast.makeText(this, "Please give permissions to the app", Toast.LENGTH_SHORT).show();
}
}
}
}
So, this is how it works, When I open my app it pops up the two permissions I need to request, Phone Call and Phone Logs meanwhile I'm giving access to this permissions registerBrodcasts(); have launched and registered my brodcast.
But here is the bug, If I request the permissions at runtime and try to call after giving this permissions my brodcast does not launch, but, if I go to the app settings and give them manually, the brodcast works without problems.
I dont know why from my app giving this permissions does not register my brodcast but giving them manually does.
This is the brodcast
public class CallReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
String phoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
Toast.makeText(context, "Intercepted call " + phoneNumber, Toast.LENGTH_LONG).show();
if (phoneNumber.equals("123456789")) {
Intent browserIntent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse("http://myweb.com"));
browserIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(browserIntent);
}
}
}
I suspect that when I give the permissions to the app, my brodcast has been registered without such permissions, but If I move the registerBrodcasts() method to my onRequestPermissionResults it also does not work
These are all my permissions, which I only need to ask for call_phone and read_call_logs
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
<uses-permission android:name="android.permission.NEW_OUTGOING_CALL" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.READ_CALL_LOG" />
I want to programmatically get the phone number in Android Studio.
I've tried this: (and it is causing crashes)
TelephonyManager tMgr =
(TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
String mPhoneNumber = tMgr.getLine1Number();
What is wrong? Any other ways to get the phone number?
I think you need <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
private String getMyPhoneNO() {
TelephonyManager tMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
String mPhoneNumber = tMgr.getLine1Number();
return mPhoneNumber;
}
with
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.READ_PHONE_STATE)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.READ_PHONE_STATE},
MY_PERMISSIONS_REQUEST_READ_PHONE_STATE);
} else {
String phoneNumber = getMyPhoneNO();
}
in Activity/Fragment
#Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
if (requestCode == MY_PERMISSIONS_REQUEST_READ_PHONE_STATE) {
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
String phoneNumber = getMyPhoneNO();
}
}
}
You need to add
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
to manifest + request the permission on runtime for newer android versions.
https://developer.android.com/training/permissions/requesting.html
if (ContextCompat.checkSelfPermission(thisActivity,
Manifest.permission.READ_PHONE_STATE)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(thisActivity,
new String[]{Manifest.permission.READ_PHONE_STATE},
MY_PERMISSIONS_REQUEST_READ_PHONE_STATE);
}
Otherwise you can see a explaining error in the stacktrace.
If the device is running Android 6.0 or higher when im trying to get phone number using getLine1Number():
java.lang.SecurityException: Requires READ_PHONE_STATE: Neither user 10184 nor current process has android.permission.READ_PHONE_STATE.
This is coming out.
I declared permission as :
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
In Android 6.0, you need to explicitly ask the user to grant the permissions. Just declaring it in the manifest isn't enough.
This article in the docs is a great place to start learning the new model, but I'll give a brief summary.
Every time you perform an action that requires a "dangerous permission," you need to check if the permission is currently granted, because the user can revoke it at any time.
This can be done with the checkSelfPermission method.
if (ContextCompat.checkSelfPermission(thisActivity, Manifest.permission.READ_PHONE_STATE)
!= PackageManager.PERMISSION_GRANTED) {
// We do not have this permission. Let's ask the user
}
You can request the permission with the requestPermissions method, as such
ActivityCompat.requestPermissions(thisActivity, new String[]{Manifest.permission.READ_PHONE_STATE}, PERMISSION_READ_STATE);
Where PERMISSION_READ_STATE is a constant integer defined by you to check in the callback method later.
You will then override onRequestPermissionsResult in your activity and see if the permission was granted. If it was, you can go ahead and preform the dangerous action.
#Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case PERMISSION_READ_STATE: {
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission granted!
// you may now do the action that requires this permission
} else {
// permission denied
}
return;
}
}
}
public class MainActivity extends AppCompatActivity {
TextView textView;
String device_unique_id,IMEI;
private static final int MY_PERMISSIONS_REQUEST_READ_PHONE_STATE = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = (TextView)findViewById(R.id.textView);
}
public void GetImei(View view)
{
loadIMEI();
}
public void loadIMEI() {
// Check if the READ_PHONE_STATE permission is already available.
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE)
!= PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.READ_PHONE_STATE)) {
// get_imei_data();
} else {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_PHONE_STATE},
MY_PERMISSIONS_REQUEST_READ_PHONE_STATE);
}
} else {
TelephonyManager mngr = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
IMEI = mngr.getDeviceId();
device_unique_id = Settings.Secure.getString(this.getContentResolver(),
Settings.Secure.ANDROID_ID);
textView.setText(device_unique_id+"----"+mngr.getDeviceId());
// READ_PHONE_STATE permission is already been granted.
Toast.makeText(this,"Alredy granted",Toast.LENGTH_SHORT).show();
}
}
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions,#NonNull int[] grantResults) {
if (requestCode == MY_PERMISSIONS_REQUEST_READ_PHONE_STATE) {
if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// Toast.makeText(this,"Alredy DONE",Toast.LENGTH_SHORT).show();
TelephonyManager mngr = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
IMEI = mngr.getDeviceId();
device_unique_id = Settings.Secure.getString(this.getContentResolver(),Settings.Secure.ANDROID_ID);
textView.setText(device_unique_id+"----"+mngr.getDeviceId());
} else {
Toast.makeText(this,"ehgehfg",Toast.LENGTH_SHORT).show();
}
}
}
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);
}