FirstActivity.java

package it.angrydroids.epub3reader;

import net.sf.andpdf.pdfviewer.PdfViewerActivity;
import pdf.render.view.*;
import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.app.FragmentManager;
import android.os.Bundle;
import android.os.Environment;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.support.v4.widget.DrawerLayout;

public class FirstActivity extends Activity implements
		NavigationDrawerFragment.NavigationDrawerCallbacks {
	static String optionERFragment;
	/**
	 * Fragment managing the behaviors, interactions and presentation of the
	 * navigation drawer.
	 */
	private NavigationDrawerFragment mNavigationDrawerFragment;

	/**
	 * Used to store the last screen title. For use in
	 * {@link #restoreActionBar()}.
	 */
	private CharSequence mTitle;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		
		if (getIntent().getBooleanExtra("EXIT", false)) {
		    finish();
		}
		
		setContentView(R.layout.activity_first);

		mNavigationDrawerFragment = (NavigationDrawerFragment) getFragmentManager()
				.findFragmentById(R.id.navigation_drawer);
		mTitle = getTitle();
		// Set up the drawer.
		mNavigationDrawerFragment.setUp(R.id.navigation_drawer,
				(DrawerLayout) findViewById(R.id.drawer_layout));
	}

	@Override
	public void onNavigationDrawerItemSelected(int position) {
		// update the main content by replacing fragments
		FragmentManager fragmentManager = getFragmentManager();
		fragmentManager
				.beginTransaction()
				.replace(R.id.container,
						PlaceholderFragment.newInstance(position + 1)).commit();
		FragmentManager manager = getFragmentManager();
		FragmentTransaction transaction = manager.beginTransaction();

		switch (position) {
		case 0:
			LibraryFragment lfrag = new LibraryFragment();
			transaction.replace(R.id.container, lfrag, "VivzFragment2");
			transaction.commit();
			break;
		case 1:

			MyFragment frag = new MyFragment();
			transaction.replace(R.id.container, frag, "VivzFragment");
			transaction.commit();
			break;

		case 2:
			// finish();
			PdfBrowserFragment pfrag = new PdfBrowserFragment();
			transaction.replace(R.id.container, pfrag, "pdfBrowserFragment");
			transaction.commit();
			break;
		case 3:
			finish();
			break;
		}

	}

	public void onSectionAttached(int number) {
		switch (number) {
		case 1:
			mTitle = getString(R.string.title_section1);
			break;
		case 2:
			mTitle = getString(R.string.title_section2);
			break;
		case 3:
			mTitle = getString(R.string.title_section3);
			break;
		}
	}

	public void restoreActionBar() {
		ActionBar actionBar = getActionBar();
		actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
		actionBar.setDisplayShowTitleEnabled(true);
		actionBar.setTitle(mTitle);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		if (!mNavigationDrawerFragment.isDrawerOpen()) {
			// Only show items in the action bar relevant to this screen
			// if the drawer is not showing. Otherwise, let the drawer
			// decide what to show in the action bar.
			getMenuInflater().inflate(R.menu.drawer_main, menu);
			restoreActionBar();
			return true;
		}
		return super.onCreateOptionsMenu(menu);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}

	/**
	 * A placeholder fragment containing a simple view.
	 */
	public static class PlaceholderFragment extends Fragment {
		/**
		 * The fragment argument representing the section number for this
		 * fragment.
		 */
		private static final String ARG_SECTION_NUMBER = "section_number";

		/**
		 * Returns a new instance of this fragment for the given section number.
		 */
		public static PlaceholderFragment newInstance(int sectionNumber) {
			PlaceholderFragment fragment = new PlaceholderFragment();
			Bundle args = new Bundle();
			args.putInt(ARG_SECTION_NUMBER, sectionNumber);
			fragment.setArguments(args);
			return fragment;
		}

		public PlaceholderFragment() {
		}

		@Override
		public View onCreateView(LayoutInflater inflater, ViewGroup container,
				Bundle savedInstanceState) {
			View rootView = inflater.inflate(R.layout.fragment_main, container,
					false);
			return rootView;
		}

		@Override
		public void onAttach(Activity activity) {
			super.onAttach(activity);
			((FirstActivity) activity).onSectionAttached(getArguments().getInt(
					ARG_SECTION_NUMBER));
		}
	}

}