在Android的帧动画造成的OutOfMemoryError在框架 [英] Causing OutOfMemoryError in Frame by Frame Animation in Android
问题描述
我有很多图片在我的资源/文件夹绘制帧（让说大约200）。并使用该图片，我想运行一个动画。最长的动画80Frames的。我成功地能够在点击一些按钮运行动画，但对于一些动画它给我的OutOfMemoryError说，虚拟机无法提供这样的内存。正是出于VM预算。我指望所有关于10MB的图像的的大小。每个图像的大小是在像素分辨率320x480。
I am having lots of images as frames in my resources/drawable folder (let say approx 200). And using this images i want run a animation. The longest animation is of 80Frames. I am successfully able to run the animation on click of the buttons for some, but for some of the animation it is giving me OutOfMemoryError saying that VM can't provide such memory. It is out of VM Budget. I count the size of all of the images its about 10MB. The size of each image is 320x480 in pixels.
我尝试使用Google，我发现我需要显式调用使用System.gc（）的方法，垃圾收集器。我已经做到了，但仍然我得到一些内存错误。任何人都可以请您帮我在这。
I try googling and found that i need to explicitly call the Garbage Collector using System.gc() method. I have done that but still i am getting some time error of memory. Can anyone please kindly help me out in this.
有些code： -
ImageView img = (ImageView)findViewById(R.id.xxx);
img.setBackgroundResource(R.anim.angry_tail_animation);
AnimationDrawable mailAnimation = (AnimationDrawable) img.getBackground();
MediaPlayer player = MediaPlayer.create(this.getApplicationContext(), R.raw.angry);
if(mailAnimation.isRunning()) {
mailAnimation.stop();
mailAnimation.start();
if (player.isPlaying()) {
player.stop();
player.start();
}
else {
player.start();
}
}
else {
mailAnimation.start();
if (player.isPlaying()) {
player.stop();
player.start();
}
else {
player.start();
}
}
这是$ C $词都写在点击按钮.....
内部资源资源文件/绘制/阿尼姆
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="true" >
<item android:drawable="@drawable/cat_angry0000" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0001" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0002" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0003" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0004" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0005" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0006" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0007" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0008" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0009" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0010" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0011" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0012" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0013" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0014" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0015" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0016" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0017" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0018" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0019" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0020" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0021" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0022" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0023" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0024" android:duration="50"/>
<item android:drawable="@drawable/cat_angry0025" android:duration="50"/>
</animation-list>
**以上是setBackgroundResource使用的资源文件，同样的方式，我有其他不同的动画10多个文件。 **
** The above is the resource file used in setBackgroundResource, same way I am having 10 more file for other different animation. **
错误日志
01-16 22:23:41.594: E/AndroidRuntime(399): FATAL EXCEPTION: main
01-16 22:23:41.594: E/AndroidRuntime(399): java.lang.IllegalStateException: Could not execute method of the activity
01-16 22:23:41.594: E/AndroidRuntime(399): at android.view.View$1.onClick(View.java:2144)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.view.View.performClick(View.java:2485)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.view.View$PerformClick.run(View.java:9080)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.os.Handler.handleCallback(Handler.java:587)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.os.Handler.dispatchMessage(Handler.java:92)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.os.Looper.loop(Looper.java:123)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.app.ActivityThread.main(ActivityThread.java:3683)
01-16 22:23:41.594: E/AndroidRuntime(399): at java.lang.reflect.Method.invokeNative(Native Method)
01-16 22:23:41.594: E/AndroidRuntime(399): at java.lang.reflect.Method.invoke(Method.java:507)
01-16 22:23:41.594: E/AndroidRuntime(399): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
01-16 22:23:41.594: E/AndroidRuntime(399): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
01-16 22:23:41.594: E/AndroidRuntime(399): at dalvik.system.NativeStart.main(Native Method)
01-16 22:23:41.594: E/AndroidRuntime(399): Caused by: java.lang.reflect.InvocationTargetException
01-16 22:23:41.594: E/AndroidRuntime(399): at java.lang.reflect.Method.invokeNative(Native Method)
01-16 22:23:41.594: E/AndroidRuntime(399): at java.lang.reflect.Method.invoke(Method.java:507)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.view.View$1.onClick(View.java:2139)
01-16 22:23:41.594: E/AndroidRuntime(399): ... 11 more
01-16 22:23:41.594: E/AndroidRuntime(399): Caused by: java.lang.OutOfMemoryError: bitmap size exceeds VM budget
01-16 22:23:41.594: E/AndroidRuntime(399): at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:460)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:336)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:697)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.content.res.Resources.loadDrawable(Resources.java:1709)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.content.res.Resources.getDrawable(Resources.java:581)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.graphics.drawable.AnimationDrawable.inflate(AnimationDrawable.java:267)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:787)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.graphics.drawable.Drawable.createFromXml(Drawable.java:728)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.content.res.Resources.loadDrawable(Resources.java:1694)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.content.res.Resources.getDrawable(Resources.java:581)
01-16 22:23:41.594: E/AndroidRuntime(399): at android.view.View.setBackgroundResource(View.java:7533)
01-16 22:23:41.594: E/AndroidRuntime(399): at talking.cat.CatActivity.middleButtonClicked(CatActivity.java:83)
如同我有不同的动画不同的按钮... 谢谢
Same way i have different buttons for different animation... Thanks
推荐答案
我假设你的动画帧图像融为一体pressed（PNG或JPG）。该pssed COM $ P $大小是不计算多少内存需要显示它们非常有用。对于这一点，你需要考虑的uncom pressed大小。这将是乘以每像素的字节数，这是典型的4（32位）像素（分辨率320x480）的数量。为了您的图像，那么，每个人将614,400字节。对于您所提供的26帧动画的例子，这将需要总计15974400字节包含原始的位图数据，所有的帧，不计算对象的开销。
I assume that your animation frame images are compressed (PNG or JPG). The compressed size is not useful for calculating how much memory is needed to display them. For that, you need to think about the uncompressed size. This will be the number of pixels (320x480) multiplied by the number of bytes per pixel, which is typically 4 (32 bits). For your images, then, each one will be 614,400 bytes. For the 26-frame animation example you provided, that will require a total of 15,974,400 bytes to hold the raw bitmap data for all the frames, not counting the object overhead.
查看源$ C $下 AnimationDrawable ，它似乎加载所有帧到内存中一次，它会基本上都做了良好的性能
Looking at the source code for AnimationDrawable, it appears to load all of the frames into memory at once, which it would basically have to do for good performance.
您是否可以分配这么多内存与否是非常依赖于系统。我想至少推荐一个真正的设备，而不是仿真器上尝试此。您也可以尝试调整仿真器的可用RAM大小，但是这仅仅是猜测。
Whether you can allocate this much memory or not is very system dependent. I would at least recommend trying this on a real device instead of the emulator. You can also try tweaking the emulator's available RAM size, but this is just guessing.
有方法可以使用 BitmapFactory.in preferredConfig 来加载位图像RGB 565（而不是ARGB 8888）一个内存更有效的格式。这将节省一些空间，但它仍然可能是不够的。
There are ways to use BitmapFactory.inPreferredConfig to load bitmaps in a more memory-efficient format like RGB 565 (rather than ARGB 8888). This would save some space, but it still might not be enough.
如果您不能分配的内存一次，你不得不考虑其他的选择。大多数高性能图形应用程序（如游戏）的小图形（精灵）或二维或三维图元（矩形，三角形）的组合绘制它们的图形。绘制全屏位图每一帧实际上是一样的演示视频;不一定是最高效的。
If you can't allocate that much memory at once, you have to consider other options. Most high performance graphics applications (e.g. games) draw their graphics from combinations of smaller graphics (sprites) or 2D or 3D primitives (rectangles, triangles). Drawing a full-screen bitmap for every frame is effectively the same as rendering video; not necessarily the most efficient.
贵的动画变化与每个帧的整个内容？另一个优化可能是唯一的动画实际更改的部分，并砍了你的位图来解释了。
Does the entire content of your animation change with each frame? Another optimization could be to animate only the portion that actually changes, and chop up your bitmaps to account for that.
总之，你需要找到一种方法，使用较少的内存来绘制动画。有很多选择，但它很大程度上取决于如何你的动画需要看。
To summarize, you need to find a way to draw your animation using less memory. There are many options, but it depends a lot on how your animation needs to look.
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