com.manning.androidhacks.hack040.TestListActivity.java Source code

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Here is the source code for com.manning.androidhacks.hack040.TestListActivity.java

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/*
50AH-code
=========
    
50 Android Hacks (http://manning.com/sessa/) book source code
    
    
Copyright (c) 2012 Manning
    
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.
    
    
*/

/*******************************************************************************
 * Copyright (c) 2012 Manning
 * See the file license.txt for copying permission.
 ******************************************************************************/
package com.manning.androidhacks.hack040;

import com.manning.androidhacks.hack040.provider.Images;
import com.manning.androidhacks.hack040.util.ImageCache;
import com.manning.androidhacks.hack040.util.ImageFetcher;
import com.manning.androidhacks.hack040.util.ImageWorker;
import com.manning.androidhacks.hack040.util.Utils;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

/**
 * User: William Sanville Date: 7/30/12 Time: 10:09 AM Testing this
 * implementation with a list.
 */
public class TestListActivity extends Activity {
    private static final String IMAGE_CACHE_DIR = "thumbs";
    private ImageWorker imageWorker;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list);
        ListView list = (ListView) findViewById(R.id.list);

        int size = (int) getResources().getDimension(R.dimen.list_image_size);
        imageWorker = new ImageFetcher(this, size);
        imageWorker.setImageFadeIn(false);
        imageWorker.setLoadingImage(R.drawable.ic_launcher);

        ImageCache.ImageCacheParams cacheParams = new ImageCache.ImageCacheParams(IMAGE_CACHE_DIR);

        // Allocate a third of the per-app memory limit to the bitmap memory cache.
        // This value
        // should be chosen carefully based on a number of factors. Refer to the
        // corresponding
        // Android Training class for more discussion:
        // http://developer.android.com/training/displaying-bitmaps/
        // In this case, we aren't using memory for much else other than this
        // activity and the
        // ImageDetailActivity so a third lets us keep all our sample image
        // thumbnails in memory
        // at once.
        cacheParams.memCacheSize = 1024 * 1024 * Utils.getMemoryClass(this) / 3;
        imageWorker.setImageCache(new ImageCache(this, cacheParams));

        list.setAdapter(new TestAdapter(this, imageWorker));
    }

    @Override
    protected void onPause() {
        super.onPause();
        imageWorker.setExitTasksEarly(true);
    }

    @Override
    protected void onResume() {
        super.onResume();
        imageWorker.setExitTasksEarly(false);
    }

    static class TestAdapter extends BaseAdapter {
        private Context context;
        private ImageWorker imageWorker;

        TestAdapter(Context context, ImageWorker imageWorker) {
            this.context = context;
            this.imageWorker = imageWorker;
        }

        @Override
        public int getCount() {
            return Images.otherUrlAdapter.getSize();
        }

        @Override
        public Object getItem(int i) {
            return Images.otherUrlAdapter.getItem(i);
        }

        @Override
        public long getItemId(int i) {
            return i;
        }

        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {
            if (view == null) {
                view = LayoutInflater.from(context).inflate(R.layout.list_item, null);
                view.setTag(new Holder(view));
            }

            Holder holder = (Holder) view.getTag();
            holder.textView.setText("Item " + i);
            imageWorker.loadImage(getItem(i), holder.imageView);

            return view;
        }

        static class Holder {
            ImageView imageView;
            TextView textView;

            Holder(View item) {
                imageView = (ImageView) item.findViewById(R.id.image);
                textView = (TextView) item.findViewById(R.id.text);
            }
        }
    }
}