com.vti.managers.DrawableManager.java Source code

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Here is the source code for com.vti.managers.DrawableManager.java

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/**
 * Copyright 2011 Sol Ma
 * 
 * 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.vti.managers;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.util.HashMap;
import java.util.Map;

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

import com.vti.services.SocialServiceImpl;

import android.graphics.drawable.Drawable;
import com.vti.utils.Log;
import android.widget.ImageView;

public class DrawableManager {
    private static final String TAG = DrawableManager.class.getSimpleName();

    private final Map<String, Drawable> drawableMap;

    public DrawableManager() {
        drawableMap = new HashMap<String, Drawable>();
    }

    private Drawable fetchDrawable(String urlString) {
        try {
            InputStream is = fetch(urlString);
            Drawable drawable = Drawable.createFromStream(new FlushedInputStream(is), "src");
            if (null != drawable) {
                drawableMap.put(urlString, drawable);
            }
            return drawable;
        } catch (Exception e) {
            Log.e(TAG, "*************   fetchDrawable() -> " + urlString + " fetchDrawable failed");
            return null;
        }
    }

    public void fetchDrawableOnThread(final String urlString, final ImageView imageView) {
        if (drawableMap.containsKey(urlString)) {
            imageView.setImageDrawable(drawableMap.get(urlString));
        } else {
            Thread thread = new Thread() {
                @Override
                public void run() {
                    final Drawable drawable = fetchDrawable(urlString);
                    if (!drawableMap.containsKey(urlString)) {
                        drawableMap.put(urlString, drawable);
                    }
                    if (null != drawable) {
                        imageView.post(new Runnable() {
                            @Override
                            public void run() {
                                imageView.setImageDrawable(drawable);
                            }
                        });
                    }

                }
            };
            thread.start();
        }

    }

    private InputStream fetch(String urlString) throws MalformedURLException, IOException {
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpGet request = new HttpGet(urlString);
        HttpResponse response = httpClient.execute(request);
        return response.getEntity().getContent();
    }

}