de.dev.eth0.rssreader.app.ui.FeedEntryDetailActivity.java Source code

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Here is the source code for de.dev.eth0.rssreader.app.ui.FeedEntryDetailActivity.java

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/* ===================================================
 * Copyright 2015 Alex Muthmann
 *
 * 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 de.dev.eth0.rssreader.app.ui;

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.ViewPager;
import butterknife.Bind;
import de.dev.eth0.rssreader.R;
import de.dev.eth0.rssreader.app.data.database.tables.FeedEntryTable;
import de.dev.eth0.rssreader.app.ui.fragments.FeedEntryFragment;
import de.dev.eth0.rssreader.core.data.helper.DataHelper;
import timber.log.Timber;

/**
 *
 * @author deveth0
 */
public class FeedEntryDetailActivity extends AbstractBaseActivity {

    //TODO: add content listener for changes in database
    private long feedId;
    private FragmentStatePagerAdapter fragmentStatePagerAdapter;

    @Bind(R.id.feed_detail_pager)
    protected ViewPager viewPager;

    @Override
    protected void onCreate(Bundle pSavedInstanceState) {
        super.onCreate(pSavedInstanceState);
        // Handles screen rotation
        if (getSupportFragmentManager().findFragmentById(R.id.summary_list) != null) {
            Timber.d("Finishing as there is a summary list available");
            finish();
            return;
        }
        fragmentStatePagerAdapter = new FeedEntryFragmentStagePagerAdapter(getSupportFragmentManager(),
                getDataHelper());
        viewPager.setAdapter(fragmentStatePagerAdapter);
        if (pSavedInstanceState != null && pSavedInstanceState.containsKey(FeedEntryTable.COLUMN_ID)) {
            feedId = pSavedInstanceState.getLong(FeedEntryTable.COLUMN_ID);
        }
        if (getIntent().getExtras() != null && getIntent().getExtras().containsKey(FeedEntryTable.COLUMN_ID)) {
            feedId = getIntent().getExtras().getLong(FeedEntryTable.COLUMN_ID);
        }
        Timber.d("onCreate show %d", feedId);
        viewPager.setCurrentItem(getDataHelper().getDataProviderHelper().getFeedEntryPositionForId(feedId));
    }

    @Override
    protected int getContentView() {
        return R.layout.feed_entry_activity;
    }

    @Override
    protected void onSaveInstanceState(final Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putLong(FeedEntryTable.COLUMN_ID, feedId);
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        if (savedInstanceState != null) {
            feedId = savedInstanceState.getLong(FeedEntryTable.COLUMN_ID);
        }
    }

    private static class FeedEntryFragmentStagePagerAdapter extends FragmentStatePagerAdapter {

        private final DataHelper datahelper;
        private int count = Integer.MIN_VALUE;

        private FeedEntryFragmentStagePagerAdapter(FragmentManager supportFragmentManager, DataHelper dataHelper) {
            super(supportFragmentManager);
            this.datahelper = dataHelper;
        }

        @Override
        public Fragment getItem(int i) {
            Timber.d("getting item with id %d", i);
            Fragment fragment = new FeedEntryFragment();
            Bundle args = new Bundle();
            args.putLong(FeedEntryTable.COLUMN_ID, datahelper.getDataProviderHelper().getFeedEntryIdForPosition(i));
            fragment.setArguments(args);
            return fragment;
        }

        @Override
        public int getCount() {
            if (count == Integer.MIN_VALUE) {
                count = datahelper.getDataProviderHelper().getFeedEntryCount();
            }
            return count;
        }

    }

}