0

How To Refresh RecyclerView List Like YouTube By Swiping Refresh layout

activity_main.xml:- This Is My Main Activity java

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ImagesActivity">
    <ProgressBar
        android:id="@+id/progress_circle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true" />

    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/Swipe_Refresh"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />     
    </android.support.v4.widget.SwipeRefreshLayout> 
</RelativeLayout>

MainActivity.java And This Is My MainActivity.Java+ please tell me the code

   public class ImagesActivity extends AppCompatActivity implements ImageAdapter.OnItemClickListener {
        private RecyclerView mRecyclerView;
        private ImageAdapter mAdapter;

        private ProgressBar mProgressCircle;

        private FirebaseStorage mStorage;
        private DatabaseReference mDatabaseRef;
        private ValueEventListener mDBListener;

        private List<Upload> mUploads;
        private SwipeRefreshLayout mySwipeRefreshLayout;


        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_images);
            mySwipeRefreshLayout = findViewById(R.id.Swipe_Refresh);
            mySwipeRefreshLayout.setOnRefreshListener(
                new SwipeRefreshLayout.OnRefreshListener() {
                    @Override
                    public void onRefresh() {
                    }
                }
        );

            mRecyclerView = findViewById(R.id.recycler_view);
            mRecyclerView.setHasFixedSize(true);
            mRecyclerView.setLayoutManager(new LinearLayoutManager(this));

            mProgressCircle = findViewById(R.id.progress_circle);

            mUploads = new ArrayList<>();

            mAdapter = new ImageAdapter(ImagesActivity.this, mUploads);

            mRecyclerView.setAdapter(mAdapter);

            mAdapter.setOnItemClickListener(ImagesActivity.this);

            mStorage = FirebaseStorage.getInstance();
            mDatabaseRef = FirebaseDatabase.getInstance().getReference("uploads");

            mDBListener = mDatabaseRef.addValueEventListener(new ValueEventListener() {
                @Override
                public void onDataChange(DataSnapshot dataSnapshot) {

                    mUploads.clear();

                    for (DataSnapshot postSnapshot : dataSnapshot.getChildren()) {
                        Upload upload = postSnapshot.getValue(Upload.class);
                        upload.setKey(postSnapshot.getKey());
                        mUploads.add(upload);
                    }

                    mAdapter.notifyDataSetChanged();

                    mProgressCircle.setVisibility(View.INVISIBLE);
                }

                @Override
                public void onCancelled(DatabaseError databaseError) {
                    Toast.makeText(ImagesActivity.this, databaseError.getMessage(), Toast.LENGTH_SHORT).show();
                    mProgressCircle.setVisibility(View.INVISIBLE);
                }
            });
        }

        @Override
        public void onItemClick(int position) {
            Toast.makeText(this, "Normal click at position: " + position, Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onWhatEverClick(int position) {
            Toast.makeText(this, "Whatever click at position: " + position, Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onDeleteClick(int position) {
            Upload selectedItem = mUploads.get(position);
            final String selectedKey = selectedItem.getKey();

            StorageReference imageRef = mStorage.getReferenceFromUrl(selectedItem.getImageUrl());
            imageRef.delete().addOnSuccessListener(new OnSuccessListener<Void>() {
                @Override
                public void onSuccess(Void aVoid) {
                    mDatabaseRef.child(selectedKey).removeValue();
                    Toast.makeText(ImagesActivity.this, "Item deleted", Toast.LENGTH_SHORT).show();
                }
            });
        }

        @Override
        protected void onDestroy() {
            super.onDestroy();
            mDatabaseRef.removeEventListener(mDBListener);
        }
    }

ImageAdapter.java This Is My Image Adapter

 public class ImageAdapter extends RecyclerView.Adapter<ImageAdapter.ImageViewHolder> {
    private Context mContext;
    private List<Upload> mUploads;
    private OnItemClickListener mListener;

    public ImageAdapter(Context context, List<Upload> uploads) {
        mContext = context;
        mUploads = uploads;
    }

    @Override
    public ImageViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(mContext).inflate(R.layout.image_item, parent, false);
        return new ImageViewHolder(v);
    }

    @Override
    public void onBindViewHolder(ImageViewHolder holder, int position) {
        Upload uploadCurrent = mUploads.get(position);
        holder.textViewName.setText(uploadCurrent.getName());
        Picasso.with(mContext)
                .load(uploadCurrent.getImageUrl())
                .placeholder(R.mipmap.ic_launcher)
                .fit()
                .centerCrop()
                .into(holder.imageView);
    }

    @Override
    public int getItemCount() {
        return mUploads.size();
    }

    public class ImageViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener,
            View.OnCreateContextMenuListener, MenuItem.OnMenuItemClickListener {
        public TextView textViewName;
        public ImageView imageView;

        public ImageViewHolder(View itemView) {
            super(itemView);

            textViewName = itemView.findViewById(R.id.text_view_name);
            imageView = itemView.findViewById(R.id.image_view_upload);

            itemView.setOnClickListener(this);
            itemView.setOnCreateContextMenuListener(this);
        }

        @Override
        public void onClick(View v) {
            if (mListener != null) {
                int position = getAdapterPosition();
                if (position != RecyclerView.NO_POSITION) {
                    mListener.onItemClick(position);
                }
            }
        }

        @Override
        public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
            menu.setHeaderTitle("Select Action");
            MenuItem doWhatever = menu.add(Menu.NONE, 1, 1, "Do whatever");
            MenuItem delete = menu.add(Menu.NONE, 2, 2, "Delete");

            doWhatever.setOnMenuItemClickListener(this);
            delete.setOnMenuItemClickListener(this);
        }

        @Override
        public boolean onMenuItemClick(MenuItem item) {
            if (mListener != null) {
                int position = getAdapterPosition();
                if (position != RecyclerView.NO_POSITION) {

                    switch (item.getItemId()) {
                        case 1:
                            mListener.onWhatEverClick(position);
                            return true;
                        case 2:
                            mListener.onDeleteClick(position);
                            return true;
                    }
                }
            }
            return false;
        }
    }

    public interface OnItemClickListener {
        void onItemClick(int position);

        void onWhatEverClick(int position);

        void onDeleteClick(int position);
    }

    public void setOnItemClickListener(OnItemClickListener listener) {
        mListener = listener;
    }
}

**Upload.java**

This My Upload Class package com.codinginflow.firebaseuploadexample;

import com.google.firebase.database.Exclude;

public class Upload {
    private String mName;
    private String mImageUrl;
    private String mKey;

    public Upload() {
        //empty constructor needed
    }

    public Upload(String name, String imageUrl) {
        if (name.trim().equals("")) {
            name = "No Name";
        }

        mName = name;
        mImageUrl = imageUrl;
    }

    public String getName() {
        return mName;
    }

    public void setName(String name) {
        mName = name;
    }

    public String getImageUrl() {
        return mImageUrl;
    }

    public void setImageUrl(String imageUrl) {
        mImageUrl = imageUrl;
    }

    @Exclude
    public String getKey() {
        return mKey;
    }

    @Exclude
    public void setKey(String key) {
        mKey = key;
    }
}

0 Answers0