不使用webview在安卓系统中播放.gif图片

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问题描述

我试过这样的，我在网上找到播放GIF图像:

private class MYGIFView extends View {

    Movie movie;
    InputStream is = null;
    long moviestart;

    public MYGIFView(Context context) {
        super(context);

        // Provide your own gif animation file

        is = context.getResources().openRawResource(R.drawable.mygif);
        movie = Movie.decodeStream(is);

    }

    @Override
    protected void onDraw(Canvas canvas) {

        canvas.drawColor(Color.WHITE);
        super.onDraw(canvas);
        long now = android.os.SystemClock.uptimeMillis();
        System.out.println("now=" + now);
        if (moviestart == 0) { // first time
            moviestart = now;

        }
        System.out.println("\tmoviestart=" + moviestart);
        int relTime = (int) ((now - moviestart) % movie.duration());
        System.out.println("time=" + relTime + "\treltime="
                + movie.duration());
        movie.setTime(relTime);
        movie.draw(canvas, this.getWidth() / 2 - 20,
                this.getHeight() / 2 - 40);
        this.invalidate();
    }

虽然很多人说他们得到了所需的结果.

我把gif图像放在可绘制中. 我得到movie.duration()null.

请建议我错了，或者如果有没有办法.

推荐答案

android无法在没有WebView的情况下播放gif文件.你必须将其分开进入框架并自己动画.

我在另一个stackoverflow post 来自xoyosoft 的这一点，称为gifsplitter，可以拆分一个gif进入框架.然后，您希望使用 AnimationDrawable 组合那些.

它看起来像这样:

// Your files:
res\drawable-xxxx\frame1.jpg
res\drawable-xxxx\frame2.jpg
res\drawable-xxxx\frame3.jpg
// ...
res\drawable-xxxx\frame99.jpg

然后，在上面的AnimationDrawable文档中存在一个例子，该示例将显示如何显示这些图像.

最后，您必须加载和播放动画;在AnimationDrawable文档中详细说明.

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问题描述

I tried like this, which i found on the net to play gif images:

private class MYGIFView extends View {

    Movie movie;
    InputStream is = null;
    long moviestart;

    public MYGIFView(Context context) {
        super(context);

        // Provide your own gif animation file

        is = context.getResources().openRawResource(R.drawable.mygif);
        movie = Movie.decodeStream(is);

    }

    @Override
    protected void onDraw(Canvas canvas) {

        canvas.drawColor(Color.WHITE);
        super.onDraw(canvas);
        long now = android.os.SystemClock.uptimeMillis();
        System.out.println("now=" + now);
        if (moviestart == 0) { // first time
            moviestart = now;

        }
        System.out.println("\tmoviestart=" + moviestart);
        int relTime = (int) ((now - moviestart) % movie.duration());
        System.out.println("time=" + relTime + "\treltime="
                + movie.duration());
        movie.setTime(relTime);
        movie.draw(canvas, this.getWidth() / 2 - 20,
                this.getHeight() / 2 - 40);
        this.invalidate();
    }

Though many have said that they got their desired result.

I have put the gif image in drawable. I am getting movie.duration() null.

Please suggest where am i wrong or if is there any way.

推荐答案

Android cannot play GIF files without WebView. You must break it apart into frames and animate it yourself.

I found on another StackOverflow post this bit of software from XoyoSoft, called GifSplitter, that can split a GIF into frames. You would then want to use AnimationDrawable to combine those.

It would look something like this:

// Your files:
res\drawable-xxxx\frame1.jpg
res\drawable-xxxx\frame2.jpg
res\drawable-xxxx\frame3.jpg
// ...
res\drawable-xxxx\frame99.jpg

Then, there is an example in the AnimationDrawable documentation above that will show how to display those images.

Lastly, you must load and play the animation; that, too, is detailed in the AnimationDrawable documentation.

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