com.skyrien.greenly.RetailListFragment.java Source code

Introduction

Here is the source code for com.skyrien.greenly.RetailListFragment.java

Source

package com.skyrien.greenly;

import android.database.Cursor;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.widget.SimpleCursorAdapter;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class RetailListFragment extends ListFragment implements LoaderManager.LoaderCallbacks<Cursor> {

    public static final String TAG = "ListFragment";
    public static final int LOADER_ID = 1;

    // Static variables that I need
    private static GreenlyDb greenlyDb;
    private SimpleCursorAdapter mCursorAdapter;
    private Cursor mCursor;
    private LoaderManager.LoaderCallbacks<Cursor> mCallbacks;
    private int mCurrentPosition = 0;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.d(TAG, "onCreate() called.");

    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        Log.d(TAG, "onActivityCreated() called.");

        if (savedInstanceState != null) {
            mCurrentPosition = savedInstanceState.getInt("curChoice", 0);
        }

        // Load the DB for the first time here
        // 1. Requested schema definition for the cursor, based on DB columns
        String[] dataColumns = { RetailDbContract.RetailItem.TRADENAME, RetailDbContract.RetailItem.LICENSE,
                RetailDbContract.RetailItem.STREETADDRESS, RetailDbContract.RetailItem.SUITE,
                RetailDbContract.RetailItem.CITY, RetailDbContract.RetailItem.COUNTY,
                RetailDbContract.RetailItem.LATITUDE, RetailDbContract.RetailItem.LONGITUDE };
        int[] viewIDs = { R.id.list_item_name, R.id.list_item_license, R.id.list_item_address,
                R.id.list_item_address_suite, R.id.list_item_address_city, R.id.list_item_address_county,
                R.id.list_item_stat1, R.id.list_item_stat2 };

        // 2. Initializing an empty cursorAdapter. This will be populated later
        //       when we get the Loader to work.
        mCursorAdapter = new SimpleCursorAdapter(getActivity().getApplicationContext(), R.layout.list_item, null,
                dataColumns, viewIDs, 0);

        // Let's add a footer view here, just for fun -- IT WORKS!!!
        LayoutInflater lf = getActivity().getLayoutInflater();
        getListView().setFooterDividersEnabled(true);
        TextView footerView = (TextView) lf.inflate(R.layout.footer_view, null);
        getListView().addFooterView(footerView);

        setListAdapter(mCursorAdapter);
        mCallbacks = this;
        // This gets a SupportLoaderManager from the Activity and starts the Loader
        getActivity().getSupportLoaderManager().initLoader(LOADER_ID, null, this);
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        Log.d(TAG, "onSaveInstanceState() called.");
        outState.putInt("curChoice", mCurrentPosition);
        // this saves the current position when needed
    }

    public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
        Log.d(TAG, "onCreateView() called.");
        View v = inflater.inflate(R.layout.fragment_list, parent, false);

        return v;
    }

    // THIS SECTION IS IF WE'RE USING CURSORLOADERS.
    @Override
    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
        Log.d(TAG, "onCreateLoader called for loader: " + id);

        // TODO
        switch (id) {

        // Correct loader, begin loading data from db.
        case LOADER_ID:
            return new CursorLoader(getActivity(), RetailDbContract.STORES_URI,
                    RetailDbContract.RetailItem.PROJECTION_ALL, null, null, null);
        // Invalid loader
        default:
            return null;
        }
    }

    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
        switch (loader.getId()) {
        case LOADER_ID:
            mCursorAdapter.swapCursor(cursor);
            break;
        }
    }

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

}