如何在Android中使用JPEG创建动画GIF（开发）

I am looking for a simple way to create an animated GIF in a native Android application. The source files should be JPEG (from camera or what ever) and the output should be saved as GIF on the device.

我正在寻找一种在原生Android应用程序中创建动画GIF的简单方法。源文件应为JPEG（来自相机或任何），输出应保存为设备上的GIF。

I do not want to know how to play animations or animated GIF files.

我不想知道如何播放动画或动画GIF文件。

To be clear: I want to know how to put single images frame by frame into a "movie" and then save it as a .gif file.

要清楚：我想知道如何将单个图像逐帧放入“电影”中，然后将其保存为.gif文件。

e.g. This App can do want I want to do.

例如这个应用程序可以做我想做的事。

6 个解决方案

#1

See this solution.

看到这个解决方案

https://github.com/nbadal/android-gif-encoder

It's an Android version of this post.

这是这篇文章的Android版本。

http://www.jappit.com/blog/2008/12/04/j2me-animated-gif-encoder/

To use this class, here is an example helper method to generate GIF byte array. Note here the getBitmapArray() function is a method to return all the Bitmap files in an image adapter at once. So the input is all the Bitmap files in one adapter, the output is a byte array which you can write to the file.

要使用此类，下面是一个生成GIF字节数组的示例辅助方法。请注意，getBitmapArray（）函数是一种立即返回图像适配器中所有Bitmap文件的方法。因此输入是一个适配器中的所有Bitmap文件，输出是一个可以写入文件的字节数组。

public byte[] generateGIF() {
    ArrayList<Bitmap> bitmaps = adapter.getBitmapArray();
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    AnimatedGifEncoder encoder = new AnimatedGifEncoder();
    encoder.start(bos);
    for (Bitmap bitmap : bitmaps) {
        encoder.addFrame(bitmap);
    }
    encoder.finish();
    return bos.toByteArray();
}

To use this function, do the following then you can save the file into SDcard.

要使用此功能，请执行以下操作，然后将文件保存到SD卡中。

FileOutputStream outStream = null;
        try{
            outStream = new FileOutputStream("/sdcard/generate_gif/test.gif");
            outStream.write(generateGIF());
            outStream.close();
        }catch(Exception e){
            e.printStackTrace();
        }

#2

This might help you. It's a class which is used to generate gif files.

这可能对你有帮助。它是一个用于生成gif文件的类。

http://elliot.kroo.net/software/java/GifSequenceWriter/

#3

If you only want to display these bitmaps like an animated gif, you can create an AnimatedDrawable using this code:

如果您只想像动画gif那样显示这些位图，可以使用以下代码创建AnimatedDrawable：

AnimationDrawable animation = new AnimationDrawable();
animation.addFrame(getResources().getDrawable(R.drawable.image1), 10);
animation.addFrame(getResources().getDrawable(R.drawable.image2), 50);
animation.addFrame(getResources().getDrawable(R.drawable.image3), 30);
animation.setOneShot(false);

ImageView imageAnim =  (ImageView) findViewById(R.id.imageView);
imageAnim.setImageDrawable(animation);

// start the animation!
animation.start();

#4

It did very well for me, It create file fast and good quality images

它对我来说非常好，它创建文件快速和高质量的图像

//True for dither. Will need more memory and CPU
AnimatedGIFWriter writer = new AnimatedGIFWriter(true);
OutputStream os = new FileOutputStream("animated.gif");
Bitmap bitmap; // Grab the Bitmap whatever way you can
// Use -1 for both logical screen width and height to use the first frame dimension
writer.prepareForWrite(os, -1, -1)
writer.writeFrame(os, bitmap);
// Keep adding frame here
writer.finishWrite(os);
// And you are done!!!

https://github.com/dragon66/android-gif-animated-writer

#5

Solution 1

解决方案1

Have you seen this article? ..... it's with source code..

你看过这篇文章吗？ .....这是源代码..

As I know, I think android won't play gif animation image. You should use webview that will play gif animation..

据我所知，我认为android不会播放gif动画图片。您应该使用将播放gif动画的webview ..

http://droid-blog.net/2011/10/14/tutorial-how-to-use-animated-gifs-in-android-part-1/

and if you can..

如果你能......

http://androidosbeginning.blogspot.in/2010/09/gif-animation-in-android.html

Solution 2

解决方案2

Android provides Drawable Animation.

Android提供可绘制动画。

#6

Gif is basically a set of images with a constant time delay in frames. You can not directly play gif in android. I've worked lot on playing gif animation in android.

Gif基本上是一组在帧中具有恒定时间延迟的图像。你无法在android中直接玩gif。我在android上玩gif动画很多。

When playing gif we also handle all calls of playing frames by our self. So this is not a best approach

在玩gif时，我们也可以自己处理所有玩框架的调用。所以这不是最好的方法
If you have set of images just play them by a delay in frames. That would be the all you want.

如果您有一组图像，只需按帧延迟播放即可。这就是你想要的一切。
You can not make gif in application by native code as well. There are some drawbacks as well for using gif format. Which I had faced in my game.

您也不能通过本机代码在应用程序中生成gif。使用gif格式也有一些缺点。这是我在游戏中面临的问题。
If you have set of drawables you can use AnimationDrawable for showing aanimation like gif as well. It can also set the any View.

如果你有一组drawable，你可以使用AnimationDrawable来显示像gif一样的动画。它还可以设置任何视图。

I had also made a custom view to play gif animations. First I load gif and convert it into InputStream then I pass it to my custom view class to play the gif.

我也制作了一个自定义视图来播放gif动画。首先我加载gif并将其转换为InputStream然后我将它传递给我的自定义视图类来播放gif。

 public class GifWebView extends View {
    private Movie mMovie;
    InputStream mStream;
    long mMoviestart;
    private boolean play;

public GifWebView(Context context, InputStream stream) {
    super(context);
    mStream = stream;
    setPlay(true);
    mMovie = Movie.decodeStream(mStream);
}

@Override
protected void onDraw(Canvas canvas) {

    canvas.drawColor(Color.TRANSPARENT);
    super.onDraw(canvas);
    final long now = SystemClock.uptimeMillis();

    if (mMoviestart == 0) {
        mMoviestart = now;
    }
    final int relTime = (int) ((now - mMoviestart) % mMovie.duration());

    mMovie.setTime(relTime);
    mMovie.draw(canvas, 20, 20);
    if (play) {
        Log.i("reltime", "" + relTime + ",duration:" + mMovie.duration());
        this.invalidate();
    }
}

@Override
public boolean onTouchEvent(android.view.MotionEvent event) {
    return true;
};

public boolean isPlay() {
    return play;
}

#1