net.peterkuterna.android.apps.devoxxsched.ui.SpeakersActivity.java Source code

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Here is the source code for net.peterkuterna.android.apps.devoxxsched.ui.SpeakersActivity.java

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/*
 * Copyright 2011 Peter Kuterna
 *
 * 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 net.peterkuterna.android.apps.devoxxsched.ui;

import net.peterkuterna.android.apps.devoxxsched.R;
import net.peterkuterna.android.apps.devoxxsched.provider.CfpContract;
import net.peterkuterna.android.apps.devoxxsched.ui.phone.SessionDetailActivity;
import net.peterkuterna.android.apps.devoxxsched.ui.phone.SessionsActivity;
import net.peterkuterna.android.apps.devoxxsched.util.UIUtils;
import android.app.FragmentBreadCrumbs;
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.FragmentTransaction;
import android.view.View;
import android.view.ViewGroup;
import android.widget.GridView;
import android.widget.ListView;

/**
 * An activity to show the speakers in a {@link ListView} or {@link GridView},
 * depending whether the device is a phone or a tablet. This activity can be
 * either single or multi-pane, depending on the device configuration. We want
 * the multi-pane support that {@link BaseMultiPaneActivity} offers, so we
 * inherit from it instead of {@link BaseSinglePaneActivity}.
 */
public class SpeakersActivity extends BaseMultiPaneActivity
        implements View.OnClickListener, FragmentManager.OnBackStackChangedListener {

    private FragmentManager mFragmentManager;

    private FragmentBreadCrumbs mFragmentBreadCrumbs;
    private SpeakersListFragment mSpeakersListFragment;
    private SpeakersGridFragment mSpeakersGridFragment;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_speakers);

        mFragmentManager = getSupportFragmentManager();
        mFragmentManager.addOnBackStackChangedListener(this);

        Intent intent = new Intent();
        intent.setData(CfpContract.Speakers.CONTENT_URI);

        final FragmentManager fm = getSupportFragmentManager();
        if (UIUtils.isHoneycombTablet(this)) {
            mSpeakersGridFragment = (SpeakersGridFragment) fm.findFragmentByTag("speakers");
            if (mSpeakersGridFragment == null) {
                mSpeakersGridFragment = new SpeakersGridFragment();
                mSpeakersGridFragment.setArguments(intentToFragmentArguments(intent));
                fm.beginTransaction().add(R.id.root_container, mSpeakersGridFragment, "speakers").commit();
            }
        } else {
            mSpeakersListFragment = (SpeakersListFragment) fm.findFragmentByTag("speakers");
            if (mSpeakersListFragment == null) {
                mSpeakersListFragment = new SpeakersListFragment();
                mSpeakersListFragment.setArguments(intentToFragmentArguments(intent));
                fm.beginTransaction().add(R.id.root_container, mSpeakersListFragment, "speakers").commit();
            }
        }

        if (UIUtils.isHoneycombTablet(this)) {
            mFragmentBreadCrumbs = (FragmentBreadCrumbs) findViewById(R.id.breadcrumbs);
            mFragmentBreadCrumbs.setActivity(this);
        }
        mFragmentManager.addOnBackStackChangedListener(this);

        updateBreadCrumb();
    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);

        ViewGroup detailContainer = (ViewGroup) findViewById(R.id.fragment_container_speaker_detail);
        if (detailContainer != null && detailContainer.getChildCount() > 0) {
            findViewById(R.id.fragment_container_speaker_detail).setBackgroundColor(0xffffffff);
        }
    }

    @Override
    public FragmentReplaceInfo onSubstituteFragmentForActivityLaunch(String activityClassName) {
        if (findViewById(R.id.fragment_container_speaker_detail) != null) {
            if (SessionsActivity.class.getName().equals(activityClassName)) {
                mFragmentManager.popBackStack();
                findViewById(R.id.fragment_container_speaker_detail).setBackgroundColor(0);
                return new FragmentReplaceInfo(SessionsFragment.class, "sessions",
                        R.id.fragment_container_speaker_detail);
            } else if (SessionDetailActivity.class.getName().equals(activityClassName)) {
                findViewById(R.id.fragment_container_speaker_detail).setBackgroundColor(0);
                return new FragmentReplaceInfo(SessionDetailFragment.class, "session_detail",
                        R.id.fragment_container_speaker_detail);
            }
        }
        return null;
    }

    @Override
    public void onBeforeCommitReplaceFragment(FragmentManager fm, FragmentTransaction ft, Fragment fragment) {
        super.onBeforeCommitReplaceFragment(fm, ft, fragment);
        if (fragment instanceof SessionsFragment) {
            fm.popBackStack();
        } else if (fragment instanceof SessionDetailFragment) {
            if (fm.getBackStackEntryCount() > 0) {
                fm.popBackStack();
            }
            ft.addToBackStack(null);
        }

        updateBreadCrumb();
    }

    public void onBackStackChanged() {
        updateBreadCrumb();
    }

    /**
     * Handler for the breadcrumb parent.
     */
    public void onClick(View view) {
        mFragmentManager.popBackStack();
    }

    public void updateBreadCrumb() {
        if (UIUtils.isHoneycombTablet(this)) {
            final String title = getString(R.string.title_sessions);
            final String detailTitle = getString(R.string.title_session_detail);

            if (mFragmentManager.getBackStackEntryCount() >= 1) {
                mFragmentBreadCrumbs.setParentTitle(title, title, this);
                mFragmentBreadCrumbs.setTitle(detailTitle, detailTitle);
            } else {
                mFragmentBreadCrumbs.setParentTitle(null, null, null);
                mFragmentBreadCrumbs.setTitle(title, title);
            }
        }
    }

}