正在编写图像编辑器。
我不支持编辑动画 gif,因此当用户选择图像时,如果该图像是动画 gif,我需要显示一条错误消息。
那么给定一个文件路径,我如何区分静态 gif 和动画 gif?
我检查了问题Understand an gif is animated or not in JAVA但它不适用于 Android,因为 ImageIO 类不可用。
注意:我只需要知道是否是动画的,所以我想要最快的方法
最佳答案
下面的代码对我有用:
使用图片http url检查。
URL url = new URL(path);
URLConnection conn = url.openConnection();
InputStream inputStream = conn.getInputStream();
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while ((len = inputStream.read(buffer)) != -1) {
outStream.write(buffer, 0, len);
}
inputStream.close();
byte[] bytes = outStream.toByteArray();
Movie gif = Movie.decodeByteArray(bytes, 0, bytes.length);
//If the result is true, its a animated GIF
if (gif != null) {
return true;
} else {
return false;
}
或从图库中选择文件进行检查:
try {
//filePath is a String converted from a selected image's URI
File file = new File(filePath);
FileInputStream fileInputStream = new FileInputStream(file);
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while ((len = fileInputStream.read(buffer)) != -1) {
outStream.write(buffer, 0, len);
}
fileInputStream.close();
byte[] bytes = outStream.toByteArray();
Movie gif = Movie.decodeByteArray(bytes, 0, bytes.length);
//If the result is true, its a animated GIF
if (gif != null) {
type = "Animated";
Log.d("Test", "Animated: " + type);
} else {
type = "notAnimated";
Log.d("Test", "Animated: " + type);
}
} catch (IOException ie) {
ie.printStackTrace();
}
关于java - 如何检测给定的图像文件是否是 Android 中的动画 GIF,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36060976/