7. Rich and Responsive Layouts (2)

@Override
protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.activity_main);

	if (findViewById(R.id.weather_detail_container) != null) {
		mTwoPane = true;

		if (savedInstanceState == null) {
			getSupportFragmentManager().beginTransaction()
					.replace(R.id.weather_detail_container, new DetailFragment(), DETAILFRAGMENT_TAG)
					.commit();
		}
	} else {
		mTwoPane = false;
	}

	mLocation = Utility.getPreferredLocation(this);
	// 생략
}

@Override
protected void onResume() {
	super.onResume();
	String location = Utility.getPreferredLocation(this);

	if (location != null && !location.equals(mLocation)) {
		ForecastFragment forecastFragment = (ForecastFragment)
						getSupportFragmentManager().findFragmentById(R.id.fragment_forecast);

		if (forecastFragment != null) {
			Log.i(LOG_TAG, "Location Change");
			forecastFragment.onLocationChanged();
		}
		mLocation = location;
	}
}

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

	return new CursorLoader(
			getActivity(),
			intent.getData(),
			DETAIL_COLUMNS,
			null,
			null,
			null
	);
}

public interface Callback {
    public void onItemSelected(Uri dateUri);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
	// 생략
	((Callback) getActivity())
            .onItemSelected(WeatherContract.WeatherEntry.buildWeatherLocationWithDate(
                    locationSetting, cursor.getLong(COL_WEATHER_DATE)));
}

public class MainActivity extends AppCompatActivity implements ForecastFragment.Callback {
	//생략

	@Override
    protected void onResume() {
		// 생략
            DetailFragment detailFragment = (DetailFragment)getSupportFragmentManager().findFragmentByTag(DETAILFRAGMENT_TAG);
            if(detailFragment != null) {
                detailFragment.onLocationChanged(location);
            }
		// 생략
    }

	@Override
    public void onItemSelected(Uri contentUri) {
        if (mTwoPane) {
            Bundle args = new Bundle();
            args.putParcelable(DetailFragment.DETAIL_URI, contentUri);

            DetailFragment fragment = new DetailFragment();
            fragment.setArguments(args);

            getSupportFragmentManager().beginTransaction()
                    .replace(R.id.weather_detail_container, fragment, DETAILFRAGMENT_TAG)
                    .commit();
        } else {
            Intent intent = new Intent(this, DetailActivity.class)
                    .setData(contentUri);
            startActivity(intent);
        }
    }
}

static final String DETAIL_URI = "URI";

private Uri mUri;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
						 Bundle savedInstanceState) {
	Bundle arguments = getArguments();
	if (arguments != null) {
		mUri = arguments.getParcelable(DetailFragment.DETAIL_URI);
	}
	//생략
}

void onLocationChanged(String newLocation) {
	Uri uri = mUri;
	if (null != uri) {
		long date = WeatherContract.WeatherEntry.getDateFromUri(uri);
		Uri updatedUri = WeatherContract.WeatherEntry.buildWeatherLocationWithDate(newLocation, date);
		mUri = updatedUri;
		getLoaderManager().restartLoader(DETAIL_LOADER, null, this);
	}
}

@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
	if (mUri != null) {
		return new CursorLoader(
				getActivity(),
				mUri,
				DETAIL_COLUMNS,
				null,
				null,
				null
		);
	}
	return null;
}

@Override
protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.activity_detail);
	if (savedInstanceState == null) {
		Bundle arguments = new Bundle();
		arguments.putParcelable(DetailFragment.DETAIL_URI, getIntent().getData());

		DetailFragment fragment = new DetailFragment();
		fragment.setArguments(arguments);

		getSupportFragmentManager().beginTransaction()
				.add(R.id.weather_detail_container, fragment)
				.commit();
	}
}

@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
@Override
public Intent getParentActivityIntent() {
	return super.getParentActivityIntent().addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
}

private ListView mListView;
private int mPosition = ListView.INVALID_POSITION;

private static final String SELECTED_KEY = "selected_position";


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
						 Bundle savedInstanceState) {
	// 생략
	mListView = (ListView) rootView.findViewById(R.id.listview_forecast);
    mListView.setAdapter(mForecastAdapter);

    mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
		//생략
    		mPosition = position;
		}
	});

	if(savedInstanceState != null && savedInstanceState.containsKey(SELECTED_KEY)) {
        mPosition = savedInstanceState.getInt(SELECTED_KEY);
    }

    return rootView;
}

@Override
public void onSaveInstanceState(Bundle outState) {
	if (mPosition != ListView.INVALID_POSITION) {
		outState.putInt(SELECTED_KEY, mPosition);
	}
	super.onSaveInstanceState(outState);
}


@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
    mForecastAdapter.swapCursor(data);

    if(mPosition != ListView.INVALID_POSITION) {
        mListView.smoothScrollToPosition(mPosition);
    }
}

private boolean mUseTodayLayout = true;

public void setUseTodayLayout(boolean useTodayLayout) {
    mUseTodayLayout = useTodayLayout;
}

@Override
public int getItemViewType(int position) {
	return (position == 0 && mUseTodayLayout) ? VIEW_TYPE_TODAY : VIEW_TYPE_FUTURE_DAY;
}

private boolean mUseTodayLayout;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
						 Bundle savedInstanceState) {
	// 생략
	mForecastAdapter.setUseTodayLayout(mUseTodayLayout);
	return rootView;
}

public void setUseTodayLayout(boolean useTodayLayout) {
	mUseTodayLayout = useTodayLayout;
	if (mForecastAdapter != null) {
		mForecastAdapter.setUseTodayLayout(mUseTodayLayout);
	}
}

@Override
protected void onCreate(Bundle savedInstanceState) {
	// 생략
	ForecastFragment forecastFragment = ((ForecastFragment) getSupportFragmentManager()
			.findFragmentById(R.id.fragment_forecast));
	forecastFragment.setUseTodayLayout(!mTwoPane);
}

getSupportActionBar().setElevation(0f);