VideoDetailsFragment.java

/*
 * Copyright 2014 Google Inc. All rights reserved.
 *
 * 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.android.example.leanback.fastlane;

import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v17.leanback.app.DetailsFragment;
import android.support.v17.leanback.widget.Action;
import android.support.v17.leanback.widget.ArrayObjectAdapter;
import android.support.v17.leanback.widget.ClassPresenterSelector;
import android.support.v17.leanback.widget.CursorObjectAdapter;
import android.support.v17.leanback.widget.DetailsOverviewRow;
import android.support.v17.leanback.widget.DetailsOverviewRowPresenter;
import android.support.v17.leanback.widget.HeaderItem;
import android.support.v17.leanback.widget.ListRow;
import android.support.v17.leanback.widget.ListRowPresenter;
import android.support.v17.leanback.widget.OnActionClickedListener;
import android.support.v17.leanback.widget.SinglePresenterSelector;
import android.util.Log;
import android.widget.Toast;

import com.android.example.leanback.PlayerActivity;
import com.android.example.leanback.R;
import com.android.example.leanback.data.Video;
import com.android.example.leanback.data.VideoDataManager;
import com.android.example.leanback.data.VideoItemContract;
import com.squareup.picasso.Picasso;

import java.io.IOException;
import java.io.Serializable;

/**
 *
 */
public class VideoDetailsFragment extends DetailsFragment {

    private Video selectedVideo;
    private static final int DETAIL_THUMB_WIDTH = 274;
    private static final int DETAIL_THUMB_HEIGHT = 274;

    private static final int ACTION_PLAY = 1;
    private static final int ACTION_WATCH_LATER = 2;

    private DetailRowBuilderTask mRowBuilderTask;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        selectedVideo = (Video) getActivity().getIntent().getSerializableExtra(Video.INTENT_EXTRA_VIDEO);
        (mRowBuilderTask = new DetailRowBuilderTask()).execute(selectedVideo);
    }

    @Override
    public void onStop() {
        mRowBuilderTask.cancel(true);
        super.onStop();
    }


    private class DetailRowBuilderTask extends AsyncTask<Video, Integer, DetailsOverviewRow> {

        @Override
        protected DetailsOverviewRow doInBackground(Video... videos) {
            DetailsOverviewRow row = new DetailsOverviewRow(videos[0]);
            try {
                Bitmap poster = Picasso.with(getActivity())
                        .load(videos[0].getThumbUrl())
                        .resize(dpToPx(DETAIL_THUMB_WIDTH, getActivity().getApplicationContext()),
                                dpToPx(DETAIL_THUMB_HEIGHT, getActivity().getApplicationContext()))
                        .centerCrop()
                        .get();
                row.setImageBitmap(getActivity(), poster);
            } catch (IOException e) {
                Log.e("VideoDetailsFragment", "Cannot load thumbnail for " + videos[0].getId(), e);
            }
            row.addAction(new Action(ACTION_PLAY, getResources().getString(
                    R.string.action_play)));
            row.addAction(new Action(ACTION_WATCH_LATER, getResources().getString(R.string.action_watch_later)));
            return row;

        }

        @Override
        protected void onPostExecute(DetailsOverviewRow detailRow) {
            ClassPresenterSelector ps = new ClassPresenterSelector();
            DetailsOverviewRowPresenter dorPresenter =
                    new DetailsOverviewRowPresenter(new DetailsDescriptionPresenter(getActivity()));
            // set detail background and style
            dorPresenter.setBackgroundColor(getResources().getColor(R.color.primary));
            dorPresenter.setStyleLarge(true);
            dorPresenter.setOnActionClickedListener(new OnActionClickedListener() {
                @Override
                public void onActionClicked(Action action) {
                    if (action.getId() == ACTION_PLAY) {
                        Intent intent = new Intent(getActivity(), PlayerActivity.class);
                        intent.putExtra(Video.INTENT_EXTRA_VIDEO, (Serializable)selectedVideo);
                        startActivity(intent);
                    }
                    else {
                        Toast.makeText(getActivity(), action.toString(), Toast.LENGTH_SHORT).show();
                    }
                }
            });

            ps.addClassPresenter(DetailsOverviewRow.class, dorPresenter);
            ps.addClassPresenter(ListRow.class,
                    new ListRowPresenter());

            /** bonus code for adding related items to details fragment **/
            // <START>
            ArrayObjectAdapter adapter = new ArrayObjectAdapter(ps);
            adapter.add(detailRow);

            String subcategories[] = {
                    "You may also like"
            };

            CursorObjectAdapter rowAdapter = new CursorObjectAdapter(new SinglePresenterSelector(new CardPresenter()));
            VideoDataManager manager  = new VideoDataManager(getActivity(),getLoaderManager(), VideoItemContract.VideoItem.buildDirUri(),rowAdapter);
            manager.startDataLoading();
            HeaderItem header = new HeaderItem(0, subcategories[0], null);
            adapter.add(new ListRow(header, rowAdapter));
            setAdapter(adapter);
            // <END>
            }

    }

    // Utility method for converting dp to pixels
    public static int dpToPx(int dp, Context ctx) {
        float density = ctx.getResources().getDisplayMetrics().density;
        return Math.round((float) dp * density);
    }

}