想要在保存时将GPS位置数据添加到图像,据我所知,这需要在outputStream关闭后完成。我编写了代码并实现了它,但没有写入GPS位置数据。据我所知,我已准备好EXIF数据所需的所有相关数据。
GPS转换代码
public String getLon(Location location) {
if (location == null) return "0/1,0/1,0/1000";
String[] degMinSec = Location.convert(location.getLongitude(), Location.FORMAT_SECONDS).split(":");
return degMinSec[0] + "/1," + degMinSec[1] + "/1," + degMinSec[2] + "/1000";
}
public String getLat(Location location) {
if (location == null) return "0/1,0/1,0/1000";
String[] degMinSec = Location.convert(location.getLatitude(), Location.FORMAT_SECONDS).split(":");
return degMinSec[0] + "/1," + degMinSec[1] + "/1," + degMinSec[2] + "/1000";
}
保存图片的代码
file = new File(Environment.getExternalStorageDirectory() + "/DCIM/GeoVista/" + UUID.randomUUID().toString() + ".jpg");
ImageReader.OnImageAvailableListener readerListener = new ImageReader.OnImageAvailableListener() {
@Override
public void onImageAvailable(ImageReader imageReader) {
Image image = null;
try {
image = reader.acquireLatestImage();
ByteBuffer buffer = image.getPlanes()[0].getBuffer();
byte[] bytes = new byte[buffer.capacity()];
buffer.get(bytes);
save(bytes);
storeGeoCoordsToImage(bytes);
save(bytes);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
{
if (image != null)
image.close();
}
}
}
private void save(byte[] bytes) throws IOException {
OutputStream outputStream = null;
try {
outputStream = new FileOutputStream(file);
outputStream.write(bytes);
} finally {
if (outputStream != null)
outputStream.close();
}
}
};
EXIF DATA CODE
public boolean storeGeoCoordsToImage(File file, Location location) {
// Avoid NullPointer
if (file == null || location == null) return false;
try {
ExifInterface exif = new ExifInterface(file.getAbsolutePath());
exif.setAttribute(ExifInterface.TAG_GPS_LATITUDE, getLat(location));
exif.setAttribute(ExifInterface.TAG_GPS_LATITUDE_REF, location.getLatitude() < 0 ? "S" : "N");
exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE, getLon(location));
exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE_REF, location.getLongitude() < 0 ? "W" : "E");
exif.saveAttributes();
} catch (IOException e) {
// do something
return false;
}
// Data was likely written. For sure no NullPointer.
return true;
}
非常感谢任何输入。