Android Open Source - Geoclock Navigation Drawer Fragment

• Back to Location/Application  ↑

From Project

Back to project page Geoclock.

License

The source code is released under:

GNU General Public License

Java Source Code

package maurizi.geoclock;
/*from ww w . j  a  va  2  s .co  m*/

import android.app.Activity;
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.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
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.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

import com.google.common.collect.Lists;

import java.util.Collection;

/**
 * Fragment used for managing interactions for and presentation of a navigation drawer. See the <a
 * href="https://developer.android.com/design/patterns/navigation-drawer.html#Interaction"> design guidelines</a> for a
 * complete explanation of the behaviors implemented here.
 */
public class NavigationDrawerFragment extends Fragment {

  /**
   * Remember the position of the selected item.
   */
  private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position";

  /**
   * A pointer to the current callbacks instance (the Activity).
   */
  private NavigationDrawerCallbacks mCallbacks;

  /**
   * Helper component that ties the action bar to the navigation drawer.
   */
  private ActionBarDrawerToggle mDrawerToggle;

  private DrawerLayout mDrawerLayout;
  private ListView mDrawerListView;
  private ArrayAdapter<GeoAlarm> geoAlarmAdapter;
  private View mFragmentContainerView;

  private int mCurrentSelectedPosition = 0;

  public NavigationDrawerFragment() {
  }


  public void setGeoAlarms(Collection<GeoAlarm> alarms) {
    geoAlarmAdapter.clear();
    for (GeoAlarm alarm : alarms) {
      geoAlarmAdapter.add(alarm);
    }
  }

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

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

    // Select either the default item (0) or the last selected item.
    selectItem(mCurrentSelectedPosition);
  }

  @Override
  public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    // Indicate that this fragment would like to influence the set of actions in the action bar.
    setHasOptionsMenu(true);
  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    mDrawerListView = (ListView) inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
    mDrawerListView.setOnItemClickListener((parent, view, position, id) -> selectItem(position));
    // TODO: Fix API issues
    geoAlarmAdapter = new ArrayAdapter<>(
        getActionBar().getThemedContext(),
        android.R.layout.simple_list_item_activated_1,
        Lists.newArrayList(GeoAlarm.getGeoAlarms(getActivity()))
    );
    mDrawerListView.setAdapter(geoAlarmAdapter);
    mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);
    return mDrawerListView;
  }

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

  /**
   * Users of this fragment must call this method to set up the navigation drawer interactions.
   *
   * @param fragmentId   The android:id of this fragment in its activity's layout.
   * @param drawerLayout The DrawerLayout containing this fragment's UI.
   */
  public void setUp(int fragmentId, DrawerLayout drawerLayout) {
    mFragmentContainerView = getActivity().findViewById(fragmentId);
    mDrawerLayout = drawerLayout;

    // set a custom shadow that overlays the main content when the drawer opens
    mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);

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

    // ActionBarDrawerToggle ties together the the proper interactions
    // between the navigation drawer and the action bar app icon.
    mDrawerToggle = new ActionBarDrawerToggle(
        getActivity(),
        mDrawerLayout,
        R.drawable.ic_drawer,
        R.string.navigation_drawer_open,
        R.string.navigation_drawer_close
    );

    // Defer code dependent on restoration of previous instance state.
    mDrawerLayout.post(mDrawerToggle::syncState);

    mDrawerLayout.setDrawerListener(mDrawerToggle);
  }

  private void selectItem(int position) {
    mCurrentSelectedPosition = position;
    if (mDrawerListView != null) {
      mDrawerListView.setItemChecked(position, true);
    }
    if (mDrawerLayout != null) {
      mDrawerLayout.closeDrawer(mFragmentContainerView);
    }
    if (mCallbacks != null) {
      if (geoAlarmAdapter != null) {
        mCallbacks.onNavigationDrawerItemSelected(geoAlarmAdapter.getItem(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);
    // Forward the new configuration the drawer toggle component.
    mDrawerToggle.onConfigurationChanged(newConfig);
  }

  @Override
  public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    // If the drawer is open, show the global app actions in the action bar. See also
    // showGlobalContextActionBar, which controls the top-left area of the action bar.
    if (mDrawerLayout != null && isDrawerOpen()) {
      inflater.inflate(R.menu.global, menu);
      showGlobalContextActionBar();
    }
    super.onCreateOptionsMenu(menu, inflater);
  }

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

    if (item.getItemId() == R.id.action_example) {
      Toast.makeText(getActivity(), "Example action.", Toast.LENGTH_SHORT).show();
      return true;
    }

    return super.onOptionsItemSelected(item);
  }

  /**
   * Per the navigation drawer design guidelines, updates the action bar to show the global app 'context', rather than
   * just what's in the current screen.
   */
  private void showGlobalContextActionBar() {
    ActionBar actionBar = getActionBar();
    actionBar.setDisplayShowTitleEnabled(true);
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
    actionBar.setTitle(R.string.app_name);
  }

  public ActionBarActivity getSupportActivity() {
    return (ActionBarActivity) super.getActivity();
  }

  private ActionBar getActionBar() {
    return getSupportActivity().getSupportActionBar();
  }

  /**
   * Callbacks interface that all activities using this fragment must implement.
   */
  public static interface NavigationDrawerCallbacks {
    /**
     * Called when an item in the navigation drawer is selected.
     */
    void onNavigationDrawerItemSelected(GeoAlarm alarm);
  }
}

Java Source Code List

• Back to Location/Application  ↑