用TextureView保存图像?

Question

希望你能解决我的问题:我有一个textreview来拍照，但是当他拍照时，需要包含图片的文件是空的。我不知道哪里出了问题，出了什么问题。我只是觉得问题出在文件创建的时候。谢谢你的帮助。

这是我代码的一部分:

private void takePicture() throws CameraAccessException, IOException {
if(cameraDevice == null){
return;
}
CameraManager manager = (CameraManager) Objects.requireNonNull(getContext()).getSystemService(Context.CAMERA_SERVICE);
CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraDevice.getId());
Size[] jpegSizes = null;
jpegSizes = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP).getOutputSizes(ImageFormat.JPEG);
int width = 640;
int height = 480;
if(jpegSizes!=null && jpegSizes.length>0){
width = jpegSizes[0].getWidth();
height = jpegSizes[0].getHeight();
}
ImageReader reader = ImageReader.newInstance(width,height, ImageFormat.JPEG, 1);
List<Surface> outputSurface = new ArrayList<>(2);
outputSurface.add(reader.getSurface());
outputSurface.add(new Surface(textureView.getSurfaceTexture()));
final CaptureRequest.Builder captureBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);
captureBuilder.addTarget(reader.getSurface());
captureBuilder.set(CaptureRequest.CONTROL_MODE,CameraMetadata.CONTROL_MODE_AUTO);
int rotation = Objects.requireNonNull(getActivity()).getWindowManager().getDefaultDisplay().getRotation();
captureBuilder.set(CaptureRequest.JPEG_ORIENTATION,ORIENTATIONS.get(rotation));
// First I get the path to gallery and crate new Album to my app
File file = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS);
mImageFolder = new File(file, "Fluico");
if (!mImageFolder.exists()) {
if (!mImageFolder.mkdirs()) {
Log.d("Fluicophoto", "failed to create directory");
}
}
/*Second I cut mFile = new File(getActivity().getExternalFilesDir(null), "pic.jpg");
from onActivityCreated and add here with the new path from my Album*/
@SuppressLint("SimpleDateFormat") String timestamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String prepend = "IMAGE_" + timestamp + "_";
file = File.createTempFile(prepend, ".jpg", mImageFolder);
Toast.makeText(getContext(), "file need to be save", Toast.LENGTH_SHORT).show();
ImageReader.OnImageAvailableListener readerListener = new ImageReader.OnImageAvailableListener() {
@Override
public void onImageAvailable(ImageReader reader) {
Image image = null;
image = reader.acquireLatestImage();
ByteBuffer buffer = image.getPlanes()[0].getBuffer();
byte[] bytes = new byte[buffer.capacity()];
buffer.get(bytes);
try {
save(bytes);
} finally {
image.close();
}
}
};
reader.setOnImageAvailableListener(readerListener,mBackgroundHandler);
final CameraCaptureSession.CaptureCallback captureListener = new CameraCaptureSession.CaptureCallback() {
@Override
public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request, TotalCaptureResult result) {
super.onCaptureCompleted(session, request, result);
Toast.makeText(getContext(), "saved", Toast.LENGTH_SHORT).show();
try{
createCameraPreview();
}catch (CameraAccessException e){
Toast.makeText(getContext(), "capture not comleted", Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
};
cameraDevice.createCaptureSession(outputSurface, new CameraCaptureSession.StateCallback() {
@Override
public void onConfigured( CameraCaptureSession session) {
try {
session.capture(captureBuilder.build(), captureListener, mBackgroundHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
Toast.makeText(getContext(), "capture not configured", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onConfigureFailed( CameraCaptureSession session) {
}
},mBackgroundHandler);
}
private void save(byte[] bytes) {
OutputStream outputStream = null;
try {
outputStream = new FileOutputStream(file);
outputStream.write(bytes);
outputStream.close();
Toast.makeText(getContext(), "it's good", Toast.LENGTH_SHORT).show();
}catch (IOException e){
Toast.makeText(getContext(), "file not found", Toast.LENGTH_SHORT).show();
}
}

Answer 1

试试下面的代码:

File myDir;
String fname;
String id = "123456";
int count = 0;
String root = Environment.getExternalStorageDirectory().toString();
myDir = new File(root + "/PhotoApp/" + id);
myDir.mkdirs();
count++;
counter.setText(String.valueOf(count));
fname = "" + id + "-" + count + ".jpg";
File file = new File(myDir, fname);
if (file.exists()) file.delete();

这段代码将创建一个文件夹PhotoApp，并在该文件夹中存储所有的图像。

你可以得到完整的代码与相机在我的GitHub:

链接:https://github.com/abhishekhzb/quick_camera