Android Open Source - spring-a-gram-android Main Activity

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License

The source code is released under:
Apache License
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Java Source Code

/*
 * Copyright 2014 Roy Clarkson/*from  w  ww. ja v  a 2  s .  com*/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.royclarkson.springagram;

import android.app.ActionBar;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.widget.DrawerLayout;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

import com.royclarkson.springagram.model.ApiResource;
import com.royclarkson.springagram.model.GalleryResource;
import com.royclarkson.springagram.model.ItemResource;

import java.util.List;


/**
 * @author Roy Clarkson
 */
public class MainActivity extends Activity
    implements NavigationDrawerFragment.NavigationDrawerCallbacks,
    HomeFragment.HomeFragmentListener,
    PhotoListFragment.PhotoListFragmentListener,
    PhotoDetailFragment.PhotoDetailFragmentListener,
    PhotoAddFragment.PhotoAddFragmentListener,
    PhotoAddToGalleryFragment.PhotoAddToGalleryFragmentListener,
    GalleryListFragment.GalleryListFragmentListener,
    GalleryAddFragment.GalleryAddFragmentListener,
    GalleryPhotoListFragment.GalleryPhotoListFragmentListener {

  private NavigationDrawerFragment navigationDrawerFragment;

  private ApiResource apiResource;

  private List<ItemResource> photos;

  private List<GalleryResource> galleries;

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

  private int menuPosition = 0;


  //***************************************
  // Activity methods
  //***************************************

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

    navigationDrawerFragment = (NavigationDrawerFragment)
        getFragmentManager().findFragmentById(R.id.navigation_drawer);
    title = getTitle();

    // Set up the drawer.
    navigationDrawerFragment.setUp(
        R.id.navigation_drawer,
        (DrawerLayout) findViewById(R.id.drawer_layout));
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    if (!navigationDrawerFragment.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.
      switch (this.menuPosition) {
        case 1:
          getMenuInflater().inflate(R.menu.photos_list_main, menu);
          break;
        case 2:
          getMenuInflater().inflate(R.menu.gallery_list_main, menu);
          break;
        case 0:
        default:
          getMenuInflater().inflate(R.menu.main, menu);
          break;
      }
      restoreActionBar();
      return true;
    }
    return super.onCreateOptionsMenu(menu);
  }

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

  @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_add_photo) {
      showPhotoAddFragment();
      return true;
    } else if (id == R.id.action_refresh_photo_list) {
      FragmentManager fragmentManager = getFragmentManager();
      PhotoListFragment galleryListFragment =
          (PhotoListFragment) fragmentManager.findFragmentByTag(PhotoListFragment.TAG);
      galleryListFragment.fetchPhotoList();
      return true;
    } else if (id == R.id.action_add_gallery) {
      showGalleryAddFragment();
      return true;
    } else if (id == R.id.action_refresh_gallery_list) {
      FragmentManager fragmentManager = getFragmentManager();
      GalleryListFragment galleryListFragment =
          (GalleryListFragment) fragmentManager.findFragmentByTag(GalleryListFragment.TAG);
      galleryListFragment.fetchGalleryList();
      return true;
    }
    return super.onOptionsItemSelected(item);
  }

  private void showPhotoAddFragment() {
    FragmentManager fragmentManager = getFragmentManager();
    String url = this.apiResource.getLink(ApiResource.REL_ITEMS).getHref();
    PhotoAddFragment photoAddFragment = PhotoAddFragment.newInstance(url);
    FragmentTransaction transaction = fragmentManager.beginTransaction()
        .add(R.id.container, photoAddFragment)
        .addToBackStack(null);
    transaction.commit();
  }

  private void showGalleryAddFragment() {
    FragmentManager fragmentManager = getFragmentManager();
    String url = this.apiResource.getLink(ApiResource.REL_GALLERIES).getHref();
    GalleryAddFragment galleryAddFragment = GalleryAddFragment.newInstance(url);
    FragmentTransaction transaction = fragmentManager.beginTransaction()
        .add(R.id.container, galleryAddFragment)
        .addToBackStack(null);
    transaction.commit();
  }


  //***************************************
  // NavigationDrawerCallbacks methods
  //***************************************

  @Override
  public void onNavigationDrawerItemSelected(int position) {
    this.menuPosition = position;
    String url = null;
    Fragment fragment = null;
    String tag = null;
    switch (position) {
      case 0:
        url = getString(R.string.base_uri);
        fragment = HomeFragment.newInstance(url);
        tag = HomeFragment.TAG;
        break;
      case 1:
        if (this.apiResource != null) {
          url = this.apiResource.getLink(ApiResource.REL_ITEMS).getHref();
        }
        fragment = PhotoListFragment.newInstance(url);
        tag = PhotoListFragment.TAG;
        break;
      case 2:
        if (this.apiResource != null) {
          url = this.apiResource.getLink(ApiResource.REL_GALLERIES).getHref();
        }
        fragment = GalleryListFragment.newInstance(url);
        tag = GalleryListFragment.TAG;
        break;
    }
    // update the main content by replacing fragments
    if (fragment != null) {
      FragmentManager fragmentManager = getFragmentManager();
      fragmentManager.popBackStack();
      fragmentManager.beginTransaction()
          .replace(R.id.container, fragment, tag)
          .commit();
    }
  }



  //***************************************
  // HomeFragmentListener methods
  //***************************************

  @Override
  public void onResourceDownloadComplete(ApiResource apiResource) {
    this.apiResource = apiResource;
  }

  public void onNetworkError(String message) {
    Toast toast = Toast.makeText(this, message, Toast.LENGTH_LONG);
    toast.setGravity(Gravity.CENTER, 0, 0);
    toast.show();
  }


  //***************************************
  // PhotoListFragmentListener methods
  //***************************************

  @Override
  public void onDownloadPhotosComplete(List<ItemResource> photos) {
    this.photos = photos;
  }

  @Override
  public void onPhotoSelected(int position) {
    PhotoDetailFragment photoDetailFragment = PhotoDetailFragment.newInstance(position);
    FragmentManager fragmentManager = getFragmentManager();
    FragmentTransaction transaction = fragmentManager.beginTransaction()
        .add(R.id.container, photoDetailFragment)
        .addToBackStack(null);
    transaction.commit();
  }

  @Override
  public ItemResource getPhotoByPosition(int position) {
    return this.photos.get(position);
  }

  @Override
  public void onDeletePhotoByPosition(int position) {
    this.photos.remove(position);
  }

  @Override
  public void onPhotoAddToGallerySelected(int position) {
    ItemResource item = this.photos.get(position);
    String itemGalleryUrl = item.getLink(ItemResource.REL_GALLERY).getHref();
    PhotoAddToGalleryFragment photoAddToGalleryFragment = PhotoAddToGalleryFragment.newInstance(itemGalleryUrl);
    FragmentManager fragmentManager = getFragmentManager();
    FragmentTransaction transaction = fragmentManager.beginTransaction()
        .add(R.id.container, photoAddToGalleryFragment)
        .addToBackStack(null);
    transaction.commit();
  }


  //***************************************
  // PhotoDetailFragmentListener methods
  //***************************************

//  @Override
//  public PhotoResource getPhotoByPosition(int position) {
//    return this.photos.get(position);
//  }


  //***************************************
  // PhotoDetailFragmentListener methods
  //***************************************

  @Override
  public void onPhotoAddComplete() {
    FragmentManager fragmentManager = getFragmentManager();
    fragmentManager.popBackStack();
    PhotoListFragment photoListFragment =
        (PhotoListFragment) fragmentManager.findFragmentByTag(PhotoListFragment.TAG);
    photoListFragment.fetchPhotoList();
  }


  //***************************************
  // PhotoAddToGalleryFragmentListener methods
  //***************************************

  @Override
  public List<GalleryResource> getGalleryList() {
    return this.galleries;
  }

  @Override
  public void onPhotoAddToGalleryComplete() {
    getFragmentManager().popBackStack();
  }


  //***************************************
  // GalleryListFragmentListener methods
  //***************************************

  @Override
  public void onDownloadGalleriesComplete(List<GalleryResource> galleries) {
    this.galleries = galleries;
  }

  @Override
  public void onGallerySelected(int position) {
    GalleryResource gallery = this.galleries.get(position);
    String url = gallery.getLink(GalleryResource.REL_ITEMS).getHref();
    GalleryPhotoListFragment galleryPhotoListFragment = GalleryPhotoListFragment.newInstance(url);
    FragmentManager fragmentManager = getFragmentManager();
    FragmentTransaction transaction = fragmentManager.beginTransaction()
        .add(R.id.container, galleryPhotoListFragment)
        .addToBackStack(null);
    transaction.commit();
  }

  @Override
  public GalleryResource getGalleryByPosition(int position) {
    return this.galleries.get(position);
  }

  @Override
  public void onDeleteGalleryByPosition(int position) {
    this.galleries.remove(position);
  }


  //***************************************
  // GalleryAddFragmentListener methods
  //***************************************

  public void onGalleryAddComplete() {
    FragmentManager fragmentManager = getFragmentManager();
    fragmentManager.popBackStack();
    GalleryListFragment galleryListFragment =
        (GalleryListFragment) fragmentManager.findFragmentByTag(GalleryListFragment.TAG);
    galleryListFragment.fetchGalleryList();
  }


  //***************************************
  // GalleryPhotoListFragmentListener methods
  //***************************************

  @Override
  public void onDownloadGalleryPhotosComplete(List<ItemResource> photos) {
    this.photos = photos;
  }

  @Override
  public void onGalleryPhotoSelected(int position) {
    PhotoDetailFragment photoDetailFragment = PhotoDetailFragment.newInstance(position);
    FragmentManager fragmentManager = getFragmentManager();
    FragmentTransaction transaction = fragmentManager.beginTransaction()
        .add(R.id.container, photoDetailFragment)
        .addToBackStack(null);
    transaction.commit();
  }

  @Override
  public ItemResource getGalleryPhotoByPosition(int position) {
    return this.photos.get(position);
  }

  @Override
  public void onRemovePhotoFromGalleryByPosition(int position) {
    this.photos.remove(position);
  }

}
Java Source Code List
