ImageListFragment.java

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.mzba.fresco.ui;

import android.content.Intent;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;

import com.facebook.drawee.view.SimpleDraweeView;
import com.mzba.fresco.MainActivity;
import com.mzba.fresco.R;
import com.mzba.fresco.utils.ImageUrlUtils;

public class ImageListFragment extends Fragment {

    private static MainActivity mActivity;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mActivity = (MainActivity) getActivity();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        RecyclerView rv = (RecyclerView) inflater.inflate(R.layout.fragment_image_list, container, false);
        setupRecyclerView(rv);
        return rv;
    }

    private void setupRecyclerView(RecyclerView recyclerView) {
        if (ImageListFragment.this.getArguments().getInt("type") == 1) {
            recyclerView.setLayoutManager(new LinearLayoutManager(recyclerView.getContext()));
        } else if (ImageListFragment.this.getArguments().getInt("type") == 2) {
            StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
            recyclerView.setLayoutManager(layoutManager);
        } else {
            GridLayoutManager layoutManager = new GridLayoutManager(recyclerView.getContext(), 3);
            layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
            recyclerView.setLayoutManager(layoutManager);
        }
        recyclerView.setAdapter(new SimpleStringRecyclerViewAdapter(recyclerView, ImageUrlUtils.getImageUrls()));
    }

    public static class SimpleStringRecyclerViewAdapter
            extends RecyclerView.Adapter<SimpleStringRecyclerViewAdapter.ViewHolder> {

        private String[] mValues;
        private RecyclerView mRecyclerView;

        public static class ViewHolder extends RecyclerView.ViewHolder {
            public final View mView;
            public final SimpleDraweeView mImageView;

            public ViewHolder(View view) {
                super(view);
                mView = view;
                mImageView = (SimpleDraweeView) view.findViewById(R.id.image1);
            }
        }

        public SimpleStringRecyclerViewAdapter(RecyclerView recyclerView, String[] items) {
            mValues = items;
            mRecyclerView = recyclerView;
        }

        @Override
        public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item, parent, false);
            return new ViewHolder(view);
        }

        @Override
        public void onViewRecycled(ViewHolder holder) {
            if (holder.mImageView.getController() != null) {
                holder.mImageView.getController().onDetach();
            }
            if (holder.mImageView.getTopLevelDrawable() != null) {
                holder.mImageView.getTopLevelDrawable().setCallback(null);
//                ((BitmapDrawable) holder.mImageView.getTopLevelDrawable()).getBitmap().recycle();
            }
        }

        @Override
        public void onBindViewHolder(final ViewHolder holder, final int position) {
            FrameLayout.LayoutParams layoutParams = (FrameLayout.LayoutParams) holder.mImageView.getLayoutParams();
            if (mRecyclerView.getLayoutManager() instanceof GridLayoutManager) {
                layoutParams.height = 200;
            } else if (mRecyclerView.getLayoutManager() instanceof StaggeredGridLayoutManager) {
                layoutParams.height = 600;
            } else {
                layoutParams.height = 800;
            }
            Uri uri = Uri.parse(mValues[position]);
            holder.mImageView.setImageURI(uri);
            holder.mImageView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent intent = new Intent(mActivity, ViewPagerActivity.class);
                    intent.putExtra("position", position);
                    mActivity.startActivity(intent);

                }
            });
        }

        @Override
        public int getItemCount() {
            return mValues.length;
        }
    }
}