Hi, there!
I am so strange. Please help me!
I drawn a large bitmap(4500X1200px) and many small bitmaps -there are
must be drawn on the large bitmap using same canvas. (Like map and
pins) All images are downloaded and cached.
I implemented an image cache with SoftReference and draw Bitmaps from
the image cache. I need use its cached bitmaps in the many activities.
Also I copied large bitmap.I have to set true to isMutable.
The first time, it is displayed well. When I try to redraw or go to
other screens, Out of Memory error occurs.
I do not use Bitmap.recycle() before setting the bitmaps. Because
after recycling, "RuntimeException: Canvas: trying to use a recycled
bitmap" exception occurs.
I think that Garbage Collector can't remove cached bitmaps. Should
not I use image cache? i think that if i do not use image cache, it
will decrease the performance. What should I do? Please help me.
======================= MapPin class
public class MapPin {
public Bitmap bitmap;
....
//URLからアイコンを表示する。サイズ：72X72（pixelで）
bitmap = ImageCache.getImage(imgUrl);
if (bitmap == null) {
bitmap = HttpClient.getImage(imgUrl, context);
ImageCache.setImage(imgUrl, bitmap);
}
public void draw(Canvas canvas){
if(bitmap != null){
int dWidth = bitmap.getWidth()/2;
int dHeight = bitmap.getHeight()/2;
canvas.drawBitmap(bitmap, left-dWidth, top -dHeight, null);
}
}
}
========= in My Activity
//icon list of map
List<MapPin> mapPinList;
for(int indx=0; indx<mapPinList.size(); indx++){
MapPin temp= new MapPin();
temp.setBitMap(this.context,mapPinList.get(indx).iconUrl);
}
// map image
Bitmap floorMapImg = ImageCache.getImage(floorMapUrl);
if (floorMapImg == null) {
floorMapImg =
HttpClient.getImage(mapList.get(defaultMapIndx).floorMapUrl, this);
ImageCache.setImage(mapList.get(defaultMapIndx).floorMapUrl,
floorMapImg);
}
floorMapImg = floorMapImg.copy(Bitmap.Config.RGB_565, true);
//draw icons
Canvas canvas = new Canvas(floorMapImg);
for(int indx=0; indx < mapPinList.size(); indx++){
mapPinList.get(indx).draw(canvas);
}
Thanks!
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