Android marshmallow request permission?

Question

I am currently working on an application that requires several \"dangerous\" permissions. So I tried adding \"ask for permission\" as required in Android Marshmallow(API Lev

Answer 1

This code below works perfectly.I am explaining with the help of an example.

In my case i placed the permission checks separately in a util class and passed the specific permissions i need to check from the appropriate classes.This enabled to reuse the permission check util file in the whole application.

The below code part shows the function call.In this case am requesting android.Manifest.permission.READ_EXTERNAL_STORAGE permission.

//the below call is from a fragment
     @OnClick(R.id.button)//butterknife implementation
        public void attachPressed() {
            if (PermissionUtils.hasThisPermission(getContext(), android.Manifest.permission.READ_EXTERNAL_STORAGE)) {
                onAttachPressed();
            } else {
                PermissionUtils.isPermissionRequestNeeded(getActivity(), this, android.Manifest.permission.READ_EXTERNAL_STORAGE, PermissionUtils.REQUEST_GROUP_STORAGE);
            }
        }   

In the above case permission is checked if it is allowed the onAttachPressed(); function is called else we check request permission.

The below is the code present in the util class in my case PermissionUtils

public final class PermissionUtils {

    public static final int REQUEST_GROUP_STORAGE = 1508;

    private PermissionUtils() {
    }

    public static boolean hasThisPermission(Context context, String permission) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            return ActivityCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED;
        } else {
            return true;
        }
    }

    public static boolean isPermissionRequestNeeded(Activity activity, Fragment fragment, String permission, int requestCode) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && !hasThisPermission(activity, permission)) {
            final String[] permissions = new String[]{permission};
            if (fragment == null) {
                activity.requestPermissions(permissions, requestCode);
            } else {
                fragment.requestPermissions(permissions, requestCode);
            }
            return true;
        }
        return false;
    }
}

And after the request if you might want to call the function from onRequestPermissionsResult or else you will need to press the button again for the function call.

So just call it from onRequestPermissionsResult

//the below call  is from a fragment
     @Override
        public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
            if (requestCode == PermissionUtils.REQUEST_GROUP_STORAGE && grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                onAttachPressed();
            } else {
                Log.e("value", "Permission Denied, You cannot use local drive .");
            }
        }