NavigationDrawerFragment.java

package in.ceeq.home;

import in.ceeq.Ceeq;
import in.ceeq.R;
import in.ceeq.commons.Utils;
import android.app.ActionBar;
import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.app.Fragment;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
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 android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

import com.android.volley.cache.SimpleImageLoader;

public class NavigationDrawerFragment extends Fragment {

	private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position";

	private NavigationDrawerCallbacks mCallbacks;
	private SimpleImageLoader imageLoader;

	private ActionBarDrawerToggle mDrawerToggle;

	private DrawerLayout mDrawerLayout;
	private ListView mDrawerListView;
	private View mFragmentContainerView;
	private int mCurrentSelectedPosition = 0;
	private Context context;

	public NavigationDrawerFragment() {
	}

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

		if (savedInstanceState != null) {
			mCurrentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION);
		}

		context = getActivity();
		setupCache();
		selectItem(mCurrentSelectedPosition);
	}

	public void setupCache() {
		imageLoader = Ceeq.getInstance().getImageCache();
	}

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

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
		mDrawerListView = (ListView) inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
	
		setListHeader(inflater);
		setUpListeners();
		
		if (Utils.getBooleanPrefs(context, Utils.FIRST_LOGIN)) {
			mDrawerLayout.openDrawer(mFragmentContainerView);
			Utils.setBooleanPrefs(context, Utils.FIRST_LOGIN, false);
		}
		
		return mDrawerListView;
	}
	
	public void setUpListeners(){
		
		DrawerAdapter drawerAdapter = DrawerAdapter.getInstance(getActivity().getLayoutInflater());
		mDrawerListView.setAdapter(drawerAdapter);		
		mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);
		
		mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
			@Override
			public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
				selectItem(position);
			}
		});
	}

	public boolean isDrawerOpen() {
		return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(mFragmentContainerView);
	}

	public void setUp(int fragmentId, DrawerLayout drawerLayout) {
		mFragmentContainerView = getActivity().findViewById(fragmentId);
		mDrawerLayout = drawerLayout;

		mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);

		ActionBar actionBar = getActivity().getActionBar();
		actionBar.setDisplayHomeAsUpEnabled(true);
		actionBar.setHomeButtonEnabled(true);

		mDrawerToggle = new ActionBarDrawerToggle(getActivity(), /* host Activity */
		mDrawerLayout, /* DrawerLayout object */
		R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */
		R.string.drawer_open, /* "open drawer" description for accessibility */
		R.string.drawer_close /* "close drawer" description for accessibility */
		) {
			@Override
			public void onDrawerClosed(View drawerView) {
				super.onDrawerClosed(drawerView);
				if (!isAdded()) {
					return;
				}
			}

			@Override
			public void onDrawerOpened(View drawerView) {
				super.onDrawerOpened(drawerView);
				if (!isAdded()) {
					return;
				}
			}
		};
		
		mDrawerLayout.post(new Runnable() {
			@Override
			public void run() {
				mDrawerToggle.syncState();
			}
		});

		mDrawerLayout.setDrawerListener(mDrawerToggle);
	}

	private void setListHeader(LayoutInflater layoutInflater) {
		View view = layoutInflater.inflate(R.layout.drawer_list_header, null, false);
		TextView userId = (TextView) view.findViewById(R.id.user_id_drawer);
		TextView userName = (TextView) view.findViewById(R.id.user_name_drawer);
		ImageView userImage = (ImageView) view.findViewById(R.id.user_image_drawer);
		userId.setText(Utils.getStringPrefs(context, Utils.ACCOUNT_USER_ID));
		userName.setText(Utils.getStringPrefs(context, Utils.ACCOUNT_USER_NAME));
		String imageUrl = Utils.getStringPrefs(context, Utils.ACCOUNT_USER_IMAGE_URL);
		imageLoader.get(imageUrl, userImage, getResources().getDrawable(R.drawable.ic_user));
		mDrawerListView.addHeaderView(view, null, false);
	}

	private void selectItem(int position) {
		mCurrentSelectedPosition = position;
		if (mDrawerListView != null) {
			mDrawerListView.setItemChecked(position, true);
		}
		if (mDrawerLayout != null) {
			mDrawerLayout.closeDrawer(mFragmentContainerView);
		}
		if (mCallbacks != null) {
			mCallbacks.onNavigationDrawerItemSelected(position);
		}
	}

	@Override
	public void onAttach(Activity activity) {
		super.onAttach(activity);
		try {
			mCallbacks = (NavigationDrawerCallbacks) activity;
		} catch (ClassCastException e) {
			throw new ClassCastException("Activity must implement NavigationDrawerCallbacks.");
		}
	}

	@Override
	public void onDetach() {
		super.onDetach();
		mCallbacks = null;
	}

	@Override
	public void onSaveInstanceState(Bundle outState) {
		super.onSaveInstanceState(outState);
		outState.putInt(STATE_SELECTED_POSITION, mCurrentSelectedPosition);
	}

	@Override
	public void onConfigurationChanged(Configuration newConfig) {
		super.onConfigurationChanged(newConfig);
		mDrawerToggle.onConfigurationChanged(newConfig);
	}

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

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		if (mDrawerToggle.onOptionsItemSelected(item)) {
			return true;
		}

		return super.onOptionsItemSelected(item);
	}

	public static interface NavigationDrawerCallbacks {
		void onNavigationDrawerItemSelected(int position);
	}
}