CODEWITHSUNDEEP
android
sasi kiran
sasi kiran

Reputation: 368

How to Pass Custom arraylist from fragment to activity

In fragment ---my RecyclerViewAdapter On click

ImageRecycleAdapter.OnImageClicklistener onImageClicklistener=new ImageRecycleAdapter.OnImageClicklistener() {
        @Override
        public void onItemClicks(View view, int position) {
        Log.e("onitemclic image",""+position);

          OnimageUrlPass  onimageUrlPass=(OnimageUrlPass)getContext();
            onimageUrlPass.getUrllist(image_final);

            Intent intent=new Intent(getContext(),ImagePagerAct.class);
            startActivity(intent);

        }
    };

Interface in fragment

 public interface OnimageUrlPass{
        void getUrllist(ArrayList<ImageUrl> url);
    }

In Activity Implements

public class ImagePagerAct extends AppCompatActivity implements ImageFag.OnimageUrlPass{}

In Activity Implements method

@Override
public void getUrllist(ArrayList<ImageUrl> url) {
    this.imageUrl=url;
}

error

   java.lang.ClassCastException: com.example.user.newsweats.UI.MainAct cannot be cast to com.example.user.newsweats.frag.ImageFag$OnimageUrlPass

Upvotes: 1

Views: 1472

Answers (2)

VivekRajendran
VivekRajendran

Reputation: 736

There are two different ways to send data from activity to fragment. Pass data as the argument when you create using the factory method.

Through factory method:

public static SimpleFragment getInstance(Bundle bundle) {
    SimpleFragment simpleFragment = new SimpleFragment();
    simpleFragment.setArguments(bundle)
    return simpleFragment;
}

Through this method you can pass simple objects like string.

Still, you can pass some complex objects by converting that object into parseable.

     new Bundle().putParcelable("Key", ParcebleObject);

Through the interface

Using interface, you can pass almost any data. Create an interface, in my case I create an interface called SomeEventListener.

Interface

public interface SomeEventListener {
   public onSomeEventHappened(ArrayList<String> arrayListOfString);
}

Fragment class

public class SimpleFragment extends Fragment implement SomeEventHappened {
    public interface onSomeEventListener {

    private ArrayList<String> arrayList;


    public View onCreateView(LayoutInflater inflater, ViewGroup container,
       Bundle savedInstanceState) {
       View v = inflater.inflate(R.layout.fragment2, null);

      //..........
      return v;
    }

   public onSomeEventHappened(ArrayList<String> arrayListOfString) {
   this.arrayList = arrayListOfString;
   }
 }

In your MainActivity.java file

 public class MainActivity extends AppCompatActivity {
    @override
    public void onCreate(Bundle savedInstanceState) {
      //........
      ArrayList<String> array = new ArrayList<>();
      SimpleFragment fragment = new SimpleFragment();
      SomeEventListener listener = fragment.getEventListener();
      listener.onSomeEventHappened(array);
 }

This will work for any kind of object.

Upvotes: 3

Ircover
Ircover

Reputation: 2446

It seems you put wrong Context object to your RecyclerViewAdapter constructor. Thats why object returned by getContext never could be cast to OnimageUrlPass interface. Try to call adapter constructor inside ImagePagerAct with new RecyclerViewAdapter(this).

Upvotes: 2

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