MapBitmapManager.java Source code

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Here is the source code for MapBitmapManager.java

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/*------------------------------------------------------------------------
* (The MIT License)
* 
* Copyright (c) 2008-2011 Rhomobile, Inc.
* 
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* 
* http://rhomobile.com
*------------------------------------------------------------------------*/

import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.util.Hashtable;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import android.graphics.Bitmap;

import com.rhomobile.rhodes.Logger;
import com.rhomobile.rhodes.util.Utils;

public class MapBitmapManager {

    private static final String TAG = MapBitmapManager.class.getSimpleName();

    private static int ourBitmapGlobalID = 0;

    private class BitmapHolder {
        public Bitmap bitmap;
        public int refCount;
    }

    private Hashtable<Integer, BitmapHolder> mBitmaps = null;

    private static MapBitmapManager ourManager = null;

    public MapBitmapManager() {
        mBitmaps = new Hashtable<Integer, BitmapHolder>();
    }

    public static MapBitmapManager getSharedInstance() {
        if (ourManager == null) {
            ourManager = new MapBitmapManager();
        }
        return ourManager;
    }

    public Bitmap getBitmap(int id) {
        BitmapHolder bh = mBitmaps.get(new Integer(id));
        if (bh == null) {
            return null;
        }
        return bh.bitmap;
    }

    public int addBitmap(Bitmap bitmap) {
        int id = 0;
        synchronized (mBitmaps) {
            BitmapHolder bh = new BitmapHolder();
            bh.bitmap = bitmap;
            bh.refCount = 1;
            id = ++ourBitmapGlobalID;
            mBitmaps.put(new Integer(id), bh);
        }
        //Logger.I(TAG, "addBitmap() return "+String.valueOf(id));
        return id;
    }

    public void releaseBitmap(int id) {
        //Logger.I(TAG, "releaseBitmap("+String.valueOf(id)+")");
        synchronized (mBitmaps) {
            BitmapHolder bh = mBitmaps.get(new Integer(id));
            if (bh != null) {
                bh.refCount--;
                if (bh.refCount <= 0) {
                    //Logger.I(TAG, "releaseBitmap() REAL REMOVE");
                    bh.bitmap.recycle();
                    mBitmaps.remove(new Integer(id));
                }
            }
        }
    }

    public void addRef(int id) {
        BitmapHolder bh = mBitmaps.get(new Integer(id));
        if (bh != null) {
            bh.refCount++;
        }
    }

    public void totalClean() {
        synchronized (mBitmaps) {
            mBitmaps.clear();
        }
    }

}