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Improved Download Google Static Map (#51)
Signed-off-by: Andrea Cappelli <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| package org.kontalk.util; | ||
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| import java.io.File; | ||
| import java.util.HashMap; | ||
| import java.util.LinkedHashSet; | ||
| import java.util.Locale; | ||
| import java.util.Map; | ||
| import java.util.Set; | ||
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| import org.kontalk.client.HttpDownload; | ||
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| import android.content.Context; | ||
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| public class GMStaticMap { | ||
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| private static final String GM_MAP_TYPE = "roadmap"; | ||
| private static final String GM_MARKER_COLOR = "red"; | ||
| private static final char GM_MARKER_LABEL = '\0'; | ||
| private static final boolean GM_SENSOR = false; | ||
| private static final int GM_MAP_WIDTH = 600; | ||
| private static final int GM_MAP_HEIGHT = 300; | ||
| private static final int GM_MAP_ZOOM = 13; | ||
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| private static GMStaticMap sInstance; | ||
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| public static GMStaticMap getInstance(Context context) { | ||
| if (sInstance == null) | ||
| sInstance = new GMStaticMap(context.getApplicationContext()); | ||
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| return sInstance; | ||
| } | ||
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| private final Context mContext; | ||
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| private final Map<String, Set<GMStaticMapListener>> mQueue; | ||
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| private GMStaticMap(Context context) { | ||
| mContext = context; | ||
| mQueue = new HashMap<String, Set<GMStaticMapListener>>(); | ||
| } | ||
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| public File requestMap(double lat, double lon, GMStaticMapListener listener) { | ||
| String filename = String.format(Locale.US, "gmap_%f_%f.png", lat, lon); | ||
| final File dest = new File(mContext.getCacheDir(), filename); | ||
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| // file exists - return file object | ||
| if (dest.isFile()) | ||
| return dest; | ||
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| GMStaticUrlBuilder url = new GMStaticUrlBuilder() | ||
| .setCenter(lat, lon) | ||
| .setMapType(GM_MAP_TYPE) | ||
| .setMarker(GM_MARKER_COLOR, GM_MARKER_LABEL, lat, lon) | ||
| .setSensor(GM_SENSOR) | ||
| .setSize(GM_MAP_WIDTH, GM_MAP_HEIGHT) | ||
| .setZoom(GM_MAP_ZOOM); | ||
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| // queue the download | ||
| queueDownload(url.toString(), filename, dest, listener); | ||
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| return null; | ||
| } | ||
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| private void queueDownload(String url, final String id, final File destination, | ||
| GMStaticMapListener listener) { | ||
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| boolean start = false; | ||
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| synchronized (mQueue) { | ||
| Set<GMStaticMapListener> listeners = mQueue.get(id); | ||
| if (listeners == null) { | ||
| listeners = new LinkedHashSet<GMStaticMapListener>(1); | ||
| mQueue.put(id, listeners); | ||
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| start = true; | ||
| } | ||
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| listeners.add(listener); | ||
| } | ||
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| if (start) | ||
| new HttpDownload(url, destination, | ||
| new Runnable() { | ||
| public void run() { | ||
| completed(id, destination); | ||
| } | ||
| }, | ||
| new Runnable() { | ||
| public void run() { | ||
| error(id, destination); | ||
| } | ||
| }) | ||
| .start(); | ||
| } | ||
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| public void completed(String id, File destination) { | ||
| // TODO check file size | ||
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| synchronized (mQueue) { | ||
| Set<GMStaticMapListener> listeners = mQueue.get(id); | ||
| if (listeners != null) { | ||
| for (GMStaticMapListener l : listeners) | ||
| l.completed(destination); | ||
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| mQueue.remove(id); | ||
| } | ||
| } | ||
| } | ||
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| public void error(String id, File destination) { | ||
| // delete file | ||
| destination.delete(); | ||
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| synchronized (mQueue) { | ||
| Set<GMStaticMapListener> listeners = mQueue.get(id); | ||
| if (listeners != null) { | ||
| for (GMStaticMapListener l : listeners) | ||
| l.error(destination); | ||
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| mQueue.remove(id); | ||
| } | ||
| } | ||
| } | ||
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| public interface GMStaticMapListener { | ||
| public void completed(File destination); | ||
| public void error(File destination); | ||
| } | ||
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| } |