Android Open Source - my-wallpaper Category Activity

From Project

Back to project page my-wallpaper.
License

The source code is released under:
MIT License
If you think the Android project my-wallpaper listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

package com.koonen.photostream;
// www  . j  a  v  a 2s. c  o m
import android.app.Activity;
import android.app.ListActivity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;

import com.koonen.photostream.dao.Category;
import com.koonen.utils.DialogUtils;
import com.koonen.utils.DialogUtils.ClickHandler;

/**
 * 
 * @author Glick
 * 
 */
public class CategoryActivity extends ListActivity {

  private static final String TAG = CategoryActivity.class.getCanonicalName();

  private static final int MENU_ITEM_CATEGORY_ADD = 1;
  private static final int MENU_ITEM_CATEGORY_UPDATE = 2;
  private static final int MENU_ITEM_CATEGORY_DELETE = 3;

  private CategoryAdapter adapter;

  private static final String PREFERENCES_CATEGORY = "CATEGORY";
  private static final String PREFERENCE_CATEGORY_IS_FIRST = "eula.isFirst";

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    adapter = new CategoryAdapter(this);
    this.setListAdapter(adapter);

    final SharedPreferences preferences = getSharedPreferences(
        PREFERENCES_CATEGORY, Activity.MODE_PRIVATE);
    if (!preferences.getBoolean(PREFERENCE_CATEGORY_IS_FIRST, false)) {

      DialogUtils.ClickHandler clickHandler = new ClickHandler() {

        @Override
        public void handle() {
          commitCategoryIsFirst(preferences);
        }

      };

      DialogUtils.showInfoDialog(this, R.string.category_first_open,
          clickHandler, clickHandler);
    }
  }

  private void commitCategoryIsFirst(SharedPreferences preferences) {
    preferences.edit().putBoolean(PREFERENCE_CATEGORY_IS_FIRST, true)
        .commit();
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    super.onCreateOptionsMenu(menu);

    menu.add(0, MENU_ITEM_CATEGORY_ADD, 0, R.string.menu_category_add)
        .setIcon(android.R.drawable.ic_menu_edit);

    menu
        .add(0, MENU_ITEM_CATEGORY_UPDATE, 1,
            R.string.menu_category_update).setIcon(
            android.R.drawable.ic_menu_edit);

    menu
        .add(0, MENU_ITEM_CATEGORY_DELETE, 2,
            R.string.menu_category_delete).setIcon(
            android.R.drawable.ic_menu_delete);

    return true;
  }

  @Override
  public boolean onPrepareOptionsMenu(Menu menu) {
    int position = getSelectedItemPosition();
    if (position != AdapterView.INVALID_POSITION) {
      Category category = (Category) adapter.getItem(position);
      boolean canModify = adapter.isExistCategory(category)
          && !adapter.isUnmodifiable(category);
      menu.findItem(MENU_ITEM_CATEGORY_UPDATE).setEnabled(canModify);
      menu.findItem(MENU_ITEM_CATEGORY_DELETE).setEnabled(canModify);
    } else {
      menu.findItem(MENU_ITEM_CATEGORY_UPDATE).setEnabled(false);
      menu.findItem(MENU_ITEM_CATEGORY_DELETE).setEnabled(false);
    }
    return super.onPrepareOptionsMenu(menu);
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case MENU_ITEM_CATEGORY_ADD:
      CategoryEditActivity.show(this);
      return true;
    case MENU_ITEM_CATEGORY_UPDATE: {
      int position = getSelectedItemPosition();
      if (position != AdapterView.INVALID_POSITION) {
        Category category = (Category) adapter.getItem(position);
        CategoryEditActivity.show(this, category);
      }
      return true;
    }
    case MENU_ITEM_CATEGORY_DELETE: {
      int position = getSelectedItemPosition();
      if (position != AdapterView.INVALID_POSITION) {
        Category category = (Category) adapter.getItem(position);
        adapter.remove(category);
      }
      return true;
    }
    }
    return super.onOptionsItemSelected(item);
  }

  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == ActivityConstants.REQUEST_ID_CATEGORY_EDIT) {
      if (resultCode == RESULT_OK) {
        final Bundle extras = data.getExtras();

        Category category = null;
        boolean isEdit = false;
        boolean success = true;
        if (extras != null) {
          category = extras
              .getParcelable(CategoryEditActivity.EXTRA_CATEGORY);
          isEdit = extras
              .getBoolean(CategoryEditActivity.EXTRA_EDIT_CATEGORY);
        }
        if (category == null) {
          success = false;
        } else {
          try {
            Category category2 = adapter.getCategoryByName(category
                .getName());
            if (isEdit) {
              if (category2 == null
                  || category2.getId() == category.getId()) {
                adapter.update(category);
                showMessage(R.string.category_save_successfully);
              } else {
                showMessage(R.string.category_exist);
              }
            } else {
              if (category2 == null) {
                adapter.add(category);
                showMessage(R.string.category_save_successfully);
              } else {
                showMessage(R.string.category_exist);
              }
            }
          } catch (Exception e) {
            Log.e(TAG, "Couldn't save category", e);
            success = false;
          }
        }
        if (!success) {
          showMessage(R.string.category_save_fail);
        }
      }
    }
  }

  @Override
  protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);
    if (position != AdapterView.INVALID_POSITION) {
      Category category = (Category) adapter.getItem(position);
      Intent intent = new Intent();
      intent.putExtra(CategoryEditActivity.EXTRA_CATEGORY, category);
      setResult(ActivityConstants.RESULT_CATEGORY_SEARCH, intent);
      finish();
    }
  }

  private void showMessage(int resId) {
    Toast.makeText(this, resId, Toast.LENGTH_SHORT).show();
  }

  static void show(Activity context) {
    Intent intent = new Intent(context, CategoryActivity.class);
    context.startActivityForResult(intent,
        ActivityConstants.REQUEST_ID_CATEGORY_SEARCH);
  }
}
Java Source Code List
