创建使用在Android帧动画闪屏 [英] Create animated splash screen using frames on Android

问题描述

所以这里的交易，我已经搜查每一个问题，并链接在线，但没有一个是有帮助的。 我在.jpg格式的动画的120帧为我的启动画面。据我所知，JPEG文件转换为位图在内存中，因此这就是为什么我得到一个OutOfMemoryError。我得到动画的最大帧是10。有什么办法一帧做这个框架，或者我应该试试别的。这是我的code：

So here's the deal, I've searched every single question and link online but none are helpful. I have 120 frames of an animation in .jpg format for my splash screen. I understand that jpegs are converted to bitmaps on memory so that's why I get an OutOfMemoryError. The maximum frames I get to animate are 10. Is there any way to do this frame by frame, or should I try something else. Here's my code:

    final AnimationDrawable anim = new AnimationDrawable();
    anim.setOneShot(true);

    for (int i = 1; i <= 120; i++) 
    {
        Drawable logo = getResources().getDrawable(getResources()
                  .getIdentifier("l"+i, "drawable", getPackageName()));

        anim.addFrame(logo, 50);
        if (i % 3 == 0)
        {
            System.gc();
        }
    }

    ImageView myImageView = (ImageView) findViewById(R.id.SplashImageView);
    myImageView.setBackgroundDrawable(anim);
    myImageView.post(new Runnable()
    {
       public void run()
       {
          anim.start();
       }
    });

我已经放在120 JPEG文件下的绘制文件夹的LpreFIX（如L1，L2等）。 我做垃圾回收，每3 JPEG文件，但不会做任何事情。

I've placed the 120 jpegs under the drawable folder with an "l" prefix (eg l1, l2 etc). I do garbage collection every 3 jpegs but that won't do a thing.

推荐答案

您可以尝试做没有 AnimationDrawable 使用 Handler.postDelayed 。事情是这样的：

You can try to do it without AnimationDrawable using Handler.postDelayed. Something like this:

final ImageView image = (ImageView) findViewById(R.id.SplashImageView);
final Handler handler = new Handler();

final Runnable animation = new Runnable() {
    private static final int MAX = 120;
    private static final int DELAY = 50;

    private int current = 0;

    @Override
    public void run() {
        final Resources resources = getResources();
        final int id = resources.getIdentifier("l" + current, "drawable", getPackageName());
        final Drawable drawable = resources.getDrawable(id);

        image.setBackgroundDrawable(drawable);
        handler.postDelayed(this, DELAY);
        current = (current + 1) % MAX;
    }
};

handler.post(animation);

这个解决方案需要更少的内存，因为它使只有一个可拉伸的时候。

This solution requires less memory because it keeps only one drawable at the time.

您可以使用取消动画 handler.removeCallbacks（动画）;

如果你想要做一个一次性的动画，你可以叫 handler.postDelayed 有条件的：

If you want make a one-shot animation you can call handler.postDelayed conditionally:

if (current != MAX - 1) {
    handler.postDelayed(this, DELAY);
}

这篇关于创建使用在Android帧动画闪屏的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！