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POAndroid View animation - poor performance on big screens
 

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  1. POAndroid View animation - poor performance on big screens
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    <p>I developed a puzzle game. In my game I have several custom views, which are nested inside FrameLayout, like layers. Each view displays a bitmap. The largest bitmap is the game board and it takes about 2/3 of screen size. There is also background image under the FrameLayout. </p> <p>When user touches the screen, simple view animations are performed with this game board view - it can be rotated or flipped.</p> <p>It all works fine on small screens, but users reported performance issues on Galaxy Tab - there's a noticeable lag just before animation starts and animation itself is not smooth. (Game board bitmap size on these screens is about 600*600px)</p> <p>Here's my layout:</p> <pre><code>&lt;FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/rootFrame" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" &gt; &lt;ImageView android:id="@+id/backgroundImageLayer" android:layout_width="fill_parent" android:layout_height="fill_parent" android:src="@drawable/background" android:scaleType="fitXY"/&gt; &lt;FrameLayout android:id="@+id/gameFrame" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" &gt; &lt;com.mygame.BoardView android:id="@+id/boardLayer" android:layout_width="fill_parent" android:layout_height="fill_parent"/&gt; &lt;com.mygame.SomeObjectView android:id="@+id/someObjectLayer" android:layout_width="fill_parent" android:layout_height="fill_parent"/&gt; &lt;com.mygame.SomeOtherObjectView android:id="@+id/someOtherObjectLayer" android:layout_width="fill_parent" android:layout_height="fill_parent"/&gt; &lt;/FrameLayout&gt; &lt;/FrameLayout&gt; </code></pre> <p>And here is my BoardView class.</p> <pre><code>public class BoardView extends View { Bitmap b; int x; int y; public BoardView(Context context, AttributeSet attrs) { super(context, attrs); // calculate size of the bitmap b = Bitmap.createBitmap(sizeX, sizeY, Bitmap.Config.ARGB_4444); createMyBitmap(); } private void createMyBitmap() { Canvas c; c = new Canvas(b); // lots of c.drawRect() and c.drawLine() , using opaque and semi-transparent colors } @Override public void onDraw(Canvas canvas) { canvas.drawBitmap(b, x, y, null); } } </code></pre> <p>And a snippet where I do the animation, it's pretty simple:</p> <pre><code>AnimationRotate anim1=new AnimationRotate(startAngle,endAngle,centerX,centerY); anim1.setDuration(500); anim1.setInterpolator(newDecelerateInterpolator()); startAnimation(anim1); </code></pre> <p>So what causes lags with view animation and how can I fix it? Is my approach correct or maybe I should use SurfaceView or frame animation or something else?</p>
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    1. USdop2000
    1. USdop2000
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    1. COYour root frame layout, does this need to be a frame or could you use a relative? I am mobile atm so I can't access the post but there was one on the use of layouts which summed up to using relative layouts or linear for better performance. I have taken to this approach and it seems to work quite well.
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      1. POAndroid View animation - poor performance on big screens
      1. USGraham Smith
    2. COI will try to use relative layout instead of frame and see if it helps. Thanks.
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