com.github.jvanhie.discogsscrobbler.NowPlayingActivity.java Source code

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Here is the source code for com.github.jvanhie.discogsscrobbler.NowPlayingActivity.java

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/*
 * Copyright (c) 2014 Jono Vanhie-Van Gerwen
 *
 * 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.github.jvanhie.discogsscrobbler;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;

/**
 * An activity representing a single Release detail screen. This
 * activity is only used on handset devices. On tablet-size devices,
 * item details are presented side-by-side with a list of items
 * in a {@link com.github.jvanhie.discogsscrobbler.ReleaseListActivity}.
 * <p>
 * This activity is mostly just a 'shell' activity containing nothing
 * more than a {@link com.github.jvanhie.discogsscrobbler.ReleaseDetailFragment}.
 */
public class NowPlayingActivity extends DrawerActivity
        implements RecentlyPlayedFragment.Callbacks, NowPlayingFragment.Callbacks {

    private ViewPager mPager;
    private PagerAdapter mPagerAdapter;
    private ReleaseDetailFragment mDetailFragment;
    private NowPlayingFragment mNowPlayingFragment;
    private RecentlyPlayedFragment mRecentlyPlayedFragment;
    private long mReleaseId;
    private boolean mReleaseChanged = false;
    private int mPanes = 1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_now_playing);

        //check if we're in tablet mode -> two or tripane layout
        if (findViewById(R.id.detail_container) != null) {
            mPanes = 3;
            //hide the detail view by default, until there is something to display
            findViewById(R.id.detail_container).setVisibility(View.GONE);
        } else if (findViewById(R.id.recently_played_container) != null) {
            mPanes = 2;
        }

        //initialize pager
        setPager();

        //set navigation drawer
        setDrawer(R.id.now_playing_drawer_layout, R.id.now_playing_drawer, getTitle().toString(),
                getTitle().toString(), true);
    }

    private void setPager() {
        if (mPanes != 3) {
            //first initialization
            if (mPager == null) {
                mPager = (ViewPager) findViewById(R.id.now_playing_pager);
                if (mPanes == 2) {
                    if (mRecentlyPlayedFragment == null)
                        mRecentlyPlayedFragment = new RecentlyPlayedFragment();
                    getSupportFragmentManager().beginTransaction()
                            .replace(R.id.recently_played_container, mRecentlyPlayedFragment).commit();
                }
            }
            //update the pager
            mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager());
            mPager.setAdapter(mPagerAdapter);
            if (mReleaseId != 0) {
                mPager.setCurrentItem(1);
            }
        } else {
            //3 pane goodness, no pagers needed
            if (mReleaseId != 0) {
                mDetailFragment = new ReleaseDetailFragment();
                Bundle arguments = new Bundle();
                arguments.putLong(ReleaseDetailFragment.ARG_ITEM_ID, mReleaseId);
                mDetailFragment.setArguments(arguments);
                getSupportFragmentManager().beginTransaction().replace(R.id.detail_container, mDetailFragment)
                        .commit();
                findViewById(R.id.detail_container).setVisibility(View.VISIBLE);
            }
            if (mNowPlayingFragment == null) {
                mNowPlayingFragment = new NowPlayingFragment();
                if (mRecentlyPlayedFragment == null) {
                    mRecentlyPlayedFragment = new RecentlyPlayedFragment();
                }
                getSupportFragmentManager().beginTransaction()
                        .replace(R.id.now_playing_container, mNowPlayingFragment)
                        .replace(R.id.recently_played_container, mRecentlyPlayedFragment).commit();
            }

        }
    }

    @Override
    public void onReleaseSet(long id) {
        if (mReleaseId != id) {
            mReleaseId = id;
            setPager();
        }
    }

    private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
        private final String[] titles = { "info", "now playing", "recently played" };

        public ScreenSlidePagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            //hackish way of skipping the info fragment if we don't have a release id
            if (mReleaseId == 0)
                position++;
            switch (position) {
            case 0:
                //if (mDetailFragment == null) {
                mDetailFragment = new ReleaseDetailFragment();
                Bundle arguments = new Bundle();
                arguments.putLong(ReleaseDetailFragment.ARG_ITEM_ID, mReleaseId);
                mDetailFragment.setArguments(arguments);
                //}
                return mDetailFragment;
            case 1:
                //force recreation of now playing tracklist
                mNowPlayingFragment = new NowPlayingFragment();
                return mNowPlayingFragment;
            case 2:
                if (mRecentlyPlayedFragment == null)
                    mRecentlyPlayedFragment = new RecentlyPlayedFragment();
                return mRecentlyPlayedFragment;
            }
            return null;
        }

        @Override
        public int getCount() {
            int count = titles.length;
            if (mReleaseId == 0)
                count--;
            if (mPanes == 2)
                count--;
            return count;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            if (mReleaseId == 0)
                return titles[position + 1];
            else
                return titles[position];
        }

    }

    @Override
    public void onItemSelected(long id) {
        Intent detailIntent = new Intent(this, ReleaseDetailActivity.class);
        detailIntent.putExtra(ReleaseDetailFragment.ARG_ITEM_ID, id);
        startActivity(detailIntent);
    }
}