com.chalmers.feedlr.ui.FeedFragment.java Source code

Introduction

Here is the source code for com.chalmers.feedlr.ui.FeedFragment.java

Source

/*
 * Copyright 2012 Feedlr
 *
 * 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.chalmers.feedlr.ui;

import com.chalmers.feedlr.R;
import com.chalmers.feedlr.activity.FeedActivity;
import com.chalmers.feedlr.adapter.FeedAdapter;
import com.chalmers.feedlr.database.DatabaseHelper;
import com.chalmers.feedlr.database.FeedCursorLoader;
import com.chalmers.feedlr.external.PullToRefreshListView;
import com.chalmers.feedlr.external.PullToRefreshListView.OnRefreshListener;
import com.chalmers.feedlr.listener.FeedListener;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.Loader;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v4.widget.CursorAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

/**
 * 
 * @author Olle Werme
 * 
 */

public class FeedFragment extends ListFragment implements LoaderCallbacks<Cursor> {

    public static FeedFragment newInstance(Bundle args) {
        FeedFragment pageFragment = new FeedFragment();
        pageFragment.setArguments(args);
        return pageFragment;
    }

    private FeedAdapter adapter;
    private String feedTitle;
    private PullToRefreshListView listView;
    private Loader<Cursor> loader;
    private FeedListener listener;
    private LocalBroadcastManager lbm;

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

        Bundle arg = getArguments();
        feedTitle = arg.getString("title");

        lbm = LocalBroadcastManager.getInstance(getActivity());

        IntentFilter filter = new IntentFilter();
        filter.addAction(FeedActivity.FEED_UPDATED);
        filter.addAction(FeedActivity.FEED_PROBLEM_UPDATING);
        filter.addAction(FeedActivity.NO_CONNECTION);
        lbm.registerReceiver(receiver, filter);
    }

    @Override
    public void onDestroy() {
        lbm.unregisterReceiver(receiver);
        super.onDestroy();
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        String[] columns = new String[] { DatabaseHelper.ITEM_COLUMN_TEXT, DatabaseHelper.ITEM_COLUMN_USERNAME };
        int[] to = new int[] { R.id.feed_item_text, R.id.feed_item_author };

        adapter = new FeedAdapter(getActivity(), R.layout.feed_item, null, columns, to, CursorAdapter.NO_SELECTION);

        setListAdapter(adapter);

        loader = getLoaderManager().initLoader(0, null, this);

        listView = (PullToRefreshListView) getListView();

        listView.setOnRefreshListener(new OnRefreshListener() {
            @Override
            public void onRefresh() {
                listener.onFeedUpdateRequest(feedTitle);
            }
        });

    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.feed_layout, container, false);
        return view;
    }

    @Override
    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
        return new FeedCursorLoader(getActivity(), feedTitle);
    }

    @Override
    public void onLoadFinished(Loader<Cursor> arg0, Cursor data) {
        adapter.swapCursor(data);
    }

    @Override
    public void onLoaderReset(Loader<Cursor> arg0) {
        adapter.swapCursor(null);
    }

    public void update() {
        getLoaderManager().restartLoader(0, null, this);
    }

    public void setUpdateRequestListener(FeedListener listener) {
        this.listener = listener;
    }

    private BroadcastReceiver receiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String broadcast = intent.getAction();

            if (broadcast.equals(FeedActivity.FEED_UPDATED)) {
                loader.forceLoad();
            } else if (broadcast.equals(FeedActivity.NO_CONNECTION)) {
                Toast.makeText(getActivity(), "No Internet connection found!", Toast.LENGTH_LONG).show();
            }

            listView.onRefreshComplete();
        }
    };
}