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PODoes the "decodeResource" method internally maintain bitmaps references?
 

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  1. PODoes the "decodeResource" method internally maintain bitmaps references?
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    <p>I'm new to android so maybe this question is obvious but I'll ask it as I didn't find it.</p> <p>I'm working with a lot of objects generated randomly (enemies on a game), and I'm concerned whether I should keep relying on decodeResource:</p> <pre><code>public class Bird extends Actor { int x=0, y=0; public Bird (Context context) { setFace(BitmapFactory.decodeResource(context.getResources(),R.drawable.bird1)); ... </code></pre> <p>or create a <strong>'bitmap manager'</strong> of my own to allocate bitmaps as needed and reuse them if already decoded. </p> <p>i.e:</p> <pre><code>public class Bird extends Actor { int x=0, y=0; public Bird (Context context) { setFace(Director.getFace(Director.BIRD)); ... </code></pre> <p>which would need a static class and a lot of other stuff, but maybe decodeResource already does this for me internally? </p> <p>In other words, is it really necessary to implement this bitmap tracker <strong>'manually'</strong>?</p> <p>For the time being, I'm using this:</p> <pre><code>public class Artist { private static Context mContext; private static Hashtable&lt;Integer, Bitmap&gt; assets = new Hashtable&lt;Integer, Bitmap&gt;(); public static void setContext(Context c) { mContext = c; } public static Bitmap getFace(int id){ if (assets.containsKey(id)) return assets.get(id); Bitmap d = BitmapFactory.decodeResource(mContext.getResources(), id); assets.put(id, d); return d; } } </code></pre> <p>Though, I'm worried of this static class having references to unused bitmaps (as the game moves on some enemies don't come anymore), then this unused bitmaps wouldn't be garbage collected.</p> <p>I guess I'll have to address this problem by limiting the size of the assets hashtable removing the least accessed bitmap from it.</p> <p>Any thoughts with regarding my former question are welcome, I'll leave two more questions:</p> <p><strong>-Would the bitmaps be successfully garbage collected after their 'Actor's reference is gone and the reference in the hashtable is also gone?</strong> </p> <p><strong>-Do you spot some obvious flaw on my approach?</strong> </p>
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    1. PTQuestion
    1. USマルちゃん だよ
    1. USマルちゃん だよ
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    1. COHow are you using these bitmaps? Are you using OpenGL? If so there's a better solution yet.
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      1. PODoes the "decodeResource" method internally maintain bitmaps references?
      1. USGraphicsMuncher
    2. COI'm just drawing it to the Canvas: public void onDraw(Canvas g) { if (frameNumber<framesTotal) g.drawBitmap(face,src,dst, paint); }
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      1. PODoes the "decodeResource" method internally maintain bitmaps references?
      1. USマルちゃん だよ
 

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