Heads up! To view this whole video, sign in with your Courses account or enroll in your free 7-day trial. Sign In Enroll
Start a free Courses trial
to watch this video
In this video we'll see how we can handle a user who denies our permission request!
AlertDialog
new AlertDialog.Builder(MainActivity.this)
.setTitle("Call Permission")
.setMessage("Hi there! We can't call anyone without the call permission, could you please grant it?")
.setPositiveButton("Yep", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
}
})
.setNegativeButton("No thanks", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
}
}).show();
Related Links
The app works just fine, what else could we want? 0:00 Well sometimes a user will deny a permission 0:03 because they don't know why it's necessary. 0:06 And in these cases it's up to us the developers 0:08 to help the user understand why we need that permission. 0:12 To make this easier for us, 0:15 Android contains a method which returns true if the user has denied a permission. 0:16 Let's see how that works. 0:22 Back in the on click method above our call to request permissions, 0:23 let's add an if statement and then for the condition, 0:29 let's type should show request permission rationale and 0:33 then let's pass in our permission manifest dot permission dot call phone. 0:38 If this is true it means the user has already denied our request. 0:45 And we should probably tell them why we need the permission 0:49 before requesting it again. 0:52 On the other hand if this is false, 0:54 then we should just request the permission normally. 0:56 So let's add an else block around our call to request permissions. 0:59 Lastly inside the if statement, 1:02 we just need to explain to our users, why we need the permission. 1:09 To do this let's use an alert dialog, I put one down below in the teacher's notes. 1:13 It's just a simple dialog that tells the user why we need the permission and 1:18 ask them if they'd be willing to grant it. 1:22 I'm gonna choose alt enter to import the missing pieces. 1:26 And all we've got to do to finish the dialog is fill in the on click methods. 1:31 If a user clicks on the positive button 1:35 then they're willing to grant the permission. 1:38 So for the positive buttons on click method, let's copy and 1:40 paste in our call to request permissions. 1:43 Otherwise if they click the negative button, there's not much we can do so 1:58 let's just toast a sad face. 2:03 Nice, now before we run the app again make sure to first uninstall it from your 2:15 device so it won't already have the permission. 2:19 Once that's done, let's run the app and 2:29 then click the call button and choose to deny the permission. 2:33 Then if we click the button again We get our alert dialog and 2:42 clicking no thanks will give us a sad face. 2:47 But if we try to call again and 2:51 instead click yes then we get another chance to allow the permission. 2:53 And if we allow it this time then we're making our call, great work. 2:58 Using permissions definitely got a little harder with Android marshmallow but 3:06 that's no excuse not to implement them. 3:09 They're fairly easy to use and they provide a much better user experience. 3:12 So get out there and 3:16 start updating your apps to use the new permissions model until next time. 3:17
You need to sign up for Treehouse in order to download course files.
Sign up