Android 6.0 multiple permissions

public static final int MULTIPLE_PERMISSIONS = 10; // code you want.

String[] permissions = new String[] {
    Manifest.permission.WRITE_EXTERNAL_STORAGE,
    Manifest.permission.CAMERA,
    Manifest.permission.ACCESS_COARSE_LOCATION,
    Manifest.permission.ACCESS_FINE_LOCATION
};

@Override
void onStart() {
    if (checkPermissions()){
        // permissions granted.    
    } else {
        // show dialog informing them that we lack certain permissions
    }
}

private boolean checkPermissions() {
    int result;
    List<String> listPermissionsNeeded = new ArrayList<>();
    for (String p:permissions) {
        result = ContextCompat.checkSelfPermission(getActivity(),p);
        if (result != PackageManager.PERMISSION_GRANTED) {
            listPermissionsNeeded.add(p);
        }
    }
    if (!listPermissionsNeeded.isEmpty()) {
        ActivityCompat.requestPermissions(this, listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]), MULTIPLE_PERMISSIONS);
        return false;
    }
    return true;
}

@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
    switch (requestCode) {
        case MULTIPLE_PERMISSIONS:{
            if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
                // permissions granted.
            } else {
                // no permissions granted.
            }
            return;
        }
    }
}