Android Open Source - Grocery-Mate Grocery Mate App

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Back to project page Grocery-Mate.

License

The source code is released under:

Apache License

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Java Source Code

/*
* Copyright (C) 2011 iMellon//from  ww  w.  ja v a2 s  .c om
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.imellon.android.grocerymate;

import java.lang.ref.WeakReference;
import java.util.ArrayList;

import android.app.Application;
import android.util.Log;

/**
* @author Christos Papazafeiropoulos, Dimitris Makris
*/

public class GroceryMateApp extends Application {
  private static final String TAG = GroceryMateApp.class.getSimpleName();
  public static final String APP_SHARED_PREFS = "com.imellon.android.apps.isupermarket.settings";

  public static interface OnLowMemoryListener {
    public void onLowMemory();
  }

  private static GroceryMateApp instance;
  private ArrayList<WeakReference<OnLowMemoryListener>> mLowMemoryListeners;
  public String sessionId = null;

  @Override
  public final void onCreate() {
    super.onCreate();

    instance = this;
    mLowMemoryListeners = new ArrayList<WeakReference<OnLowMemoryListener>>();
  }

  @Override
  public void onTerminate() {
    super.onTerminate();
  }

  @Override
  public void onLowMemory() {
    super.onLowMemory();
    Log.e(TAG, "onLowMemory");

    int i = 0;
    while (i < mLowMemoryListeners.size()) {
      final OnLowMemoryListener listener = mLowMemoryListeners.get(i)
          .get();
      if (listener == null) {
        mLowMemoryListeners.remove(i);
      } else {
        listener.onLowMemory();
        i++;
      }
    }
  }

  public static GroceryMateApp getInstance() {
    return instance;
  }

  public void registerOnLowMemoryListener(OnLowMemoryListener listener) {
    if (listener != null) {
      mLowMemoryListeners.add(new WeakReference<OnLowMemoryListener>(
          listener));
    }
  }

  public void unregisterOnLowMemoryListener(OnLowMemoryListener listener) {
    if (listener != null) {
      int i = 0;
      while (i < mLowMemoryListeners.size()) {
        final OnLowMemoryListener l = mLowMemoryListeners.get(i).get();
        if (l == null || l == listener) {
          mLowMemoryListeners.remove(i);
        } else {
          i++;
        }
      }
    }
  }
}

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