5.5 DetailFragment.java

public class DetailFragment extends Fragment implements LoaderManager.LoaderCallbacks<Cursor> {

    private static final String LOG_TAG = DetailFragment.class.getSimpleName();

    private static final String FORECAST_SHARE_HASHTAG = " #SunshineApp";

    private ShareActionProvider mShareActionProvider;
    private String mForecast;

    private static final int DETAIL_LOADER = 0;

    private static final String[] DETAIL_COLUMNS = {
            WeatherEntry.TABLE_NAME + "." + WeatherEntry._ID,
            WeatherEntry.COLUMN_DATE,
            WeatherEntry.COLUMN_SHORT_DESC,
            WeatherEntry.COLUMN_MAX_TEMP,
            WeatherEntry.COLUMN_MIN_TEMP,
            WeatherEntry.COLUMN_HUMIDITY,
            WeatherEntry.COLUMN_PRESSURE,
            WeatherEntry.COLUMN_WIND_SPEED,
            WeatherEntry.COLUMN_DEGREES,
            WeatherEntry.COLUMN_WEATHER_ID,
            // This works because the WeatherProvider returns location data joined with
            // weather data, even though they're stored in two different tables.
            WeatherContract.LocationEntry.COLUMN_LOCATION_SETTING
    };

    // These indices are tied to DETAIL_COLUMNS.  If DETAIL_COLUMNS changes, these
    // must change.
    public static final int COL_WEATHER_ID = 0;
    public static final int COL_WEATHER_DATE = 1;
    public static final int COL_WEATHER_DESC = 2;
    public static final int COL_WEATHER_MAX_TEMP = 3;
    public static final int COL_WEATHER_MIN_TEMP = 4;
    public static final int COL_WEATHER_HUMIDITY = 5;
    public static final int COL_WEATHER_PRESSURE = 6;
    public static final int COL_WEATHER_WIND_SPEED = 7;
    public static final int COL_WEATHER_DEGREES = 8;
    public static final int COL_WEATHER_CONDITION_ID = 9;

    private ImageView mIconView;
    private TextView mFriendlyDateView;
    private TextView mDateView;
    private TextView mDescriptionView;
    private TextView mHighTempView;
    private TextView mLowTempView;
    private TextView mHumidityView;
    private TextView mWindView;
    private TextView mPressureView;

    public DetailFragment() {
        setHasOptionsMenu(true);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_detail, container, false);
        mIconView = (ImageView) rootView.findViewById(R.id.detail_icon);
        mDateView = (TextView) rootView.findViewById(R.id.detail_date_textview);
        mFriendlyDateView = (TextView) rootView.findViewById(R.id.detail_day_textview);
        mDescriptionView = (TextView) rootView.findViewById(R.id.detail_forecast_textview);
        mHighTempView = (TextView) rootView.findViewById(R.id.detail_high_textview);
        mLowTempView = (TextView) rootView.findViewById(R.id.detail_low_textview);
        mHumidityView = (TextView) rootView.findViewById(R.id.detail_humidity_textview);
        mWindView = (TextView) rootView.findViewById(R.id.detail_wind_textview);
        mPressureView = (TextView) rootView.findViewById(R.id.detail_pressure_textview);
        return rootView;
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        // Inflate the menu; this adds items to the action bar if it is present.
        inflater.inflate(R.menu.detailfragment, menu);

        // Retrieve the share menu item
        MenuItem menuItem = menu.findItem(R.id.action_share);

        // Get the provider and hold onto it to set/change the share intent.
        mShareActionProvider = (ShareActionProvider) MenuItemCompat.getActionProvider(menuItem);

        // If onLoadFinished happens before this, we can go ahead and set the share intent now.
        if (mForecast != null) {
            mShareActionProvider.setShareIntent(createShareForecastIntent());
        }
    }

    private Intent createShareForecastIntent() {
        Intent shareIntent = new Intent(Intent.ACTION_SEND);
        shareIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
        shareIntent.setType("text/plain");
        shareIntent.putExtra(Intent.EXTRA_TEXT, mForecast + FORECAST_SHARE_HASHTAG);
        return shareIntent;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        getLoaderManager().initLoader(DETAIL_LOADER, null, this);
        super.onActivityCreated(savedInstanceState);
    }

    @Override
    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
        Log.v(LOG_TAG, "In onCreateLoader");
        Intent intent = getActivity().getIntent();
        if (intent == null) {
            return null;
        }

        // Now create and return a CursorLoader that will take care of
        // creating a Cursor for the data being displayed.
        return new CursorLoader(
                getActivity(),
                intent.getData(),
                DETAIL_COLUMNS,
                null,
                null,
                null
        );
    }

    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
        if (data != null && data.moveToFirst()) {
            // Read weather condition ID from cursor
            int weatherId = data.getInt(COL_WEATHER_CONDITION_ID);
            // Use placeholder Image
            mIconView.setImageResource(R.drawable.ic_launcher);

            // Read date from cursor and update views for day of week and date
            long date = data.getLong(COL_WEATHER_DATE);
            String friendlyDateText = Utility.getDayName(getActivity(), date);
            String dateText = Utility.getFormattedMonthDay(getActivity(), date);
            mFriendlyDateView.setText(friendlyDateText);
            mDateView.setText(dateText);

            // Read description from cursor and update view
            String description = data.getString(COL_WEATHER_DESC);
            mDescriptionView.setText(description);

            // Read high temperature from cursor and update view
            boolean isMetric = Utility.isMetric(getActivity());

            double high = data.getDouble(COL_WEATHER_MAX_TEMP);
            String highString = Utility.formatTemperature(getActivity(), high, isMetric);
            mHighTempView.setText(highString);

            // Read low temperature from cursor and update view
            double low = data.getDouble(COL_WEATHER_MIN_TEMP);
            String lowString = Utility.formatTemperature(getActivity(), low, isMetric);
            mLowTempView.setText(lowString);

            // Read humidity from cursor and update view
            float humidity = data.getFloat(COL_WEATHER_HUMIDITY);
            mHumidityView.setText(getActivity().getString(R.string.format_humidity, humidity));

            // Read wind speed and direction from cursor and update view
            float windSpeedStr = data.getFloat(COL_WEATHER_WIND_SPEED);
            float windDirStr = data.getFloat(COL_WEATHER_DEGREES);
            mWindView.setText(Utility.getFormattedWind(getActivity(), windSpeedStr, windDirStr));

            // Read pressure from cursor and update view
            float pressure = data.getFloat(COL_WEATHER_PRESSURE);
            mPressureView.setText(getActivity().getString(R.string.format_pressure, pressure));

            // We still need this for the share intent
            mForecast = String.format("%s - %s - %s/%s", dateText, description, high, low);

            // If onCreateOptionsMenu has already happened, we need to update the share intent now.
            if (mShareActionProvider != null) {
                mShareActionProvider.setShareIntent(createShareForecastIntent());
            }
        }
    }

    @Override
    public void onLoaderReset(Loader<Cursor> loader) { }
}