之前有遇到过一个要用多张图片合成gif图的场景，当时是搜索了好久，也没有发现有相关的使用记录。后来找到了实现方式，特此记录。

使用了Github上该project：android-gif-encoder，代码链接见页尾。

主要代码如下：

/**

* 生成gif图

*

* @param file_name 保存文件名

* @param delay 帧之间间隔的时间

*/

private void createGif(String file_name, int delay) {

ByteArrayOutputStream baos = new ByteArrayOutputStream();

AnimatedGifEncoder localAnimatedGifEncoder = new AnimatedGifEncoder();

localAnimatedGifEncoder.start(baos);//start

localAnimatedGifEncoder.setRepeat(0);//设置生成gif的开始播放时间。0为立即开始播放

localAnimatedGifEncoder.setDelay(delay);

if (pics.isEmpty()) {

localAnimatedGifEncoder.addFrame(BitmapFactory.decodeResource(getResources(), R.drawable.pic_1));

localAnimatedGifEncoder.addFrame(BitmapFactory.decodeResource(getResources(), R.drawable.pic_2));

localAnimatedGifEncoder.addFrame(BitmapFactory.decodeResource(getResources(), R.drawable.pic_3));

} else {

for (int i = 0; i < pics.size(); i++) {

// Bitmap localBitmap = ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(pics.get(i)), 512, 512);

localAnimatedGifEncoder.addFrame(BitmapFactory.decodeFile(pics.get(i)));

}

}

localAnimatedGifEncoder.finish();//finish

File file = new File(Environment.getExternalStorageDirectory().getPath() + "/GIFMakerDemo");

if (!file.exists()) file.mkdir();

String path = Environment.getExternalStorageDirectory().getPath() + "/GIFMakerDemo/" + file_name + ".gif";

Log.d(TAG, "createGif: ---->" + path);

try {

FileOutputStream fos = new FileOutputStream(path);

baos.writeTo(fos);

baos.flush();

fos.flush();

baos.close();

fos.close();

} catch (IOException e) {

e.printStackTrace();

}

gif_image.setImageURI(Uri.parse(path));

Toast.makeText(MainActivity.this, "Gif已生成。保存路径：\n" + path, Toast.LENGTH_LONG).show();

}

需要源码的同学看这里