TutorialListFragment.java

package org.michenux.yourappidea.tutorial;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.OrientationHelper;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;

import com.afollestad.materialdialogs.MaterialDialog;

import org.michenux.drodrolib.BuildConfig;
import org.michenux.drodrolib.db.utils.CursorUtils;
import org.michenux.drodrolib.ui.recyclerview.DividerItemDecoration;
import org.michenux.drodrolib.ui.recyclerview.ItemClickSupport;
import org.michenux.yourappidea.R;
import org.michenux.yourappidea.YourApplication;
import org.michenux.yourappidea.tutorial.sync.TutorialContentProvider;
import org.michenux.yourappidea.tutorial.sync.TutorialSyncAdapter;
import org.michenux.yourappidea.tutorial.sync.TutorialSyncHelper;

import javax.inject.Inject;

public class TutorialListFragment extends Fragment
        implements
        LoaderManager.LoaderCallbacks<Cursor>,
        SwipeRefreshLayout.OnRefreshListener,
        ItemClickSupport.OnItemClickListener {
    /**
     * True if has already synchronized
     */
    private boolean mHasSync = false;

    /**
     * True if refreshing
     */
    private boolean mRefreshing = false;

    private TutorialRecyclerAdapter mAdapter;

    private SwipeRefreshLayout mSwipeRefreshLayout;

    @Inject
    TutorialSyncHelper mTutorialSyncHelper;

    private BroadcastReceiver onFinishSyncReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            updateRefresh(false);
            mHasSync = true;
        }
    };

    private BroadcastReceiver onStartSyncReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            updateRefresh(true);
        }
    };

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ((YourApplication) getActivity().getApplication()).inject(this);
        setRetainInstance(true);
        setHasOptionsMenu(true);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.tutorial_list, container, false);

        // SwipeRefresh layout
        mSwipeRefreshLayout = (SwipeRefreshLayout) view.findViewById(R.id.tutorial_swiperefreshlayout);
        mSwipeRefreshLayout.setOnRefreshListener(this);
        mSwipeRefreshLayout.setColorSchemeResources(R.color.refresh_progress_1, R.color.refresh_progress_2, R.color.refresh_progress_3);

        RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.tutorial_listview);
        recyclerView.setHasFixedSize(true);
        recyclerView.setLongClickable(false);
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext());
        linearLayoutManager.setOrientation(OrientationHelper.VERTICAL);
        recyclerView.setLayoutManager(linearLayoutManager);
        recyclerView.addItemDecoration(new DividerItemDecoration(getActivity(), null));
        ItemClickSupport.addTo(recyclerView).setOnItemClickListener(this);

        this.getLoaderManager().initLoader(0, null, this);
        this.mAdapter = new TutorialRecyclerAdapter();
        recyclerView.setAdapter(this.mAdapter);

        return view;
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        if (((YourApplication) getActivity().getApplication()).isSyncAdapterRunning()) {
            if (BuildConfig.DEBUG) {
                Log.d(YourApplication.LOG_TAG, "onViewCreated: synchronizing");
            }
            updateRefresh(true);
        } else {
            if (BuildConfig.DEBUG) {
                Log.d(YourApplication.LOG_TAG, "onViewCreated: not synchronizing");
            }
        }
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        inflater.inflate(R.menu.tutorial_menu, menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.aroundme_menu_info:
                new MaterialDialog.Builder(this.getActivity())
                        .title(R.string.tutorial_info_title)
                        .items(R.array.tutorial_info_details)
                        .positiveText(R.string.close)
                        .show();

                return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onResume() {
        super.onResume();
        LocalBroadcastManager.getInstance(this.getActivity()).registerReceiver(onFinishSyncReceiver, new IntentFilter(TutorialSyncAdapter.SYNC_FINISHED));
        LocalBroadcastManager.getInstance(this.getActivity()).registerReceiver(onStartSyncReceiver, new IntentFilter(TutorialSyncAdapter.SYNC_STARTED));

        if (!mHasSync) {
            mTutorialSyncHelper.performSync();
        } else {
            updateRefresh(mRefreshing);
        }
    }

    @Override
    public void onPause() {
        // Unregister receiver
        LocalBroadcastManager.getInstance(this.getActivity()).unregisterReceiver(onFinishSyncReceiver);
        LocalBroadcastManager.getInstance(this.getActivity()).unregisterReceiver(onStartSyncReceiver);

        // Disable SwipeRefreshLayout
        // because of that bug:
        //   http://stackoverflow.com/questions/27057449/when-switch-fragment-with-swiperefreshlayout-during-refreshing-fragment-freezes
        mSwipeRefreshLayout.setRefreshing(false);
        mSwipeRefreshLayout.destroyDrawingCache();
        mSwipeRefreshLayout.clearAnimation();
        super.onPause();

    }

    @Override
    public void onItemClicked(RecyclerView recyclerView, int position, View v) {
        mAdapter.getCursor().moveToPosition(position);
        String uri = CursorUtils.getString(TutorialContentProvider.URL_COLUMN, mAdapter.getCursor());
        Intent viewTutoIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(uri));
        this.startActivity(viewTutoIntent);
    }

    @Override
    public Loader<Cursor> onCreateLoader(int arg0, Bundle bundle) {
        String[] projection = {TutorialContentProvider.ID_COLUMN,
                TutorialContentProvider.TITLE_COLUMN, TutorialContentProvider.DESCRIPTION_COLUMN, TutorialContentProvider.URL_COLUMN, TutorialContentProvider.DATECREATION_COLUMN};
        return new CursorLoader(this.getActivity(),
                TutorialContentProvider.CONTENT_URI, projection, null, null, null);
    }

    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
        this.mAdapter.changeCursor(cursor);
    }

    @Override
    public void onLoaderReset(Loader<Cursor> cursor) {
        this.mAdapter.changeCursor(null);
    }

    @Override
    public void onRefresh() {
        mTutorialSyncHelper.performSync();
    }

    /**
     * Update status of SwipeRefreshLayout
     *
     * @param isSyncing true if synchronization is progress
     */
    private void updateRefresh(final boolean isSyncing) {
        if (!isSyncing) {
            if (BuildConfig.DEBUG) {
                Log.d(YourApplication.LOG_TAG, "show as not refreshing");
            }
            mSwipeRefreshLayout.setRefreshing(false);
            mRefreshing = false;
        } else {
            if (BuildConfig.DEBUG) {
                Log.d(YourApplication.LOG_TAG, "show as refreshing");
            }
            mSwipeRefreshLayout.setRefreshing(true);
            mRefreshing = true;
        }
    }
}