Android App crash when ask for permission

I need 2 permissions for my app= Location and Record Audio. I check, if it was granted, if no, I ask for permission. The code, where I ask for permisssion looks like this=

if (Build.VERSION.SDK_INT >= 23) {

    if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        // ask for permission
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
    } else {
        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 0, locationListener);
    }

    if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
        // ask for permission
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO}, 2);
    }
}

My onRequestPermissionsResult method looks like this=

@Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        switch(requestCode) {
            case 1:
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
                    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 0, locationListener);

                }
            }

            case 2:
                permissionToRecordAccepted  = grantResults[0] == PackageManager.PERMISSION_GRANTED;
                break;

        }
    }

When i install the apk on my phone and change to that activity, where I need this 2 permissions, the app crashes in the background, but the permission windows for location is still open,when I grant it and reopen the app, change to that activity, I just have to give Location permission and everything works fine. Why does my app crash? When I only had location permission, it worked fine, after inserting audio record permission, it closes. When I run this on my emulator, it doesnt crash.

you should requestPermissions once with array of all needed permissions and you have two separated calls - second one will be called, when your app is already in background (because dialog with location permission appeared)

easiest fix would be adding return in proper place for checking is this the case (without stacktrace of exception its hard to guess)

if (Build.VERSION.SDK_INT >= 23) {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        // ask for permission
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
        return; // return in here
    } else {
    ///... rest of code

better approach would be summing up all needed permissions and calling requestPErmissions once

if (Build.VERSION.SDK_INT >= 23) {
    boolean needLocPerm = ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED;
    boolean needAudioPerm = ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED;

    String[] permsArray = null;
    if(needAudioPerm && needLocPerm ){
        permsArray = new String[]{Manifest.permission.RECORD_AUDIO,
                                 Manifest.permission.ACCESS_FINE_LOCATION};
    }
    else if(needAudioPerm){
        permsArray = new String[]{Manifest.permission.RECORD_AUDIO};
    }
    else if(needLocPerm ){
        permsArray = new String[]{Manifest.permission.ACCESS_FINE_LOCATION};
    }
    if(permsArray!=null && permsArray.length>0)
        ActivityCompat.requestPermissions(this, permsArray, 123);
    else locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 0, locationListener);
}

after this code improvement you should refactor your onRequestPermissionsResult method and check which permissions were granted (inspect String[] permissions and int[] grantResults arrays)

without a stacktrace of exception this is only guess, besides above problem everything looks fine, but there is a chance your exception is fired by some call made in another method, e.g. onPause