我尝试在Android的预览当前框架上进行一些图像过程。如果其他所有智能手机,它都可以很好地工作。但是现在,我必须使Nexus 5X的应用程序访问。
在那里,我从预览中得到了180度转动的图像。我该如何解决?在这里,我用于设置相机和预览的代码:
private void resetCamera(int width, int height){
Log.d(TAG, "Reset Camera!");
CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
try {
for (String cameraId : cameraManager.getCameraIdList()) {
CameraCharacteristics cameraCharacteristics = cameraManager.getCameraCharacteristics(cameraId);
mSensorOrientation = cameraCharacteristics.get(CameraCharacteristics.SENSOR_ORIENTATION);
if (cameraCharacteristics.get(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_FRONT) {
continue;
}
StreamConfigurationMap map = cameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
mImageReader = ImageReader.newInstance(width,
height,
ImageFormat.YUV_420_888,
10);
mImageReader.setOnImageAvailableListener(mOnImageAvailableTrack,
mBackgroundHandler);
mPreviewSize = getPreferredPreviewSize(map.getOutputSizes(SurfaceTexture.class), width, height);
mCameraId = cameraId;
return;
}
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
预览:
private void createTrackingPreviewSession(){
try{
SurfaceTexture surfaceTexture = mTextureView.getSurfaceTexture();
surfaceTexture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
Surface previewSurface = new Surface(surfaceTexture);
mPreviewCaptureBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
mPreviewCaptureBuilder.addTarget(previewSurface);
mPreviewCaptureBuilder.addTarget(mImageReader.getSurface());
int rotation = getWindowManager().getDefaultDisplay().getRotation();
mPreviewCaptureBuilder.set(CaptureRequest.JPEG_ORIENTATION,
getOrientation(rotation));
mCameraDevice.createCaptureSession(Arrays.asList(previewSurface, mImageReader.getSurface()),
new CameraCaptureSession.StateCallback(){
@Override
public void onConfigured(CameraCaptureSession session) {
if(mCameraDevice == null){
return;
}
try{
Toast.makeText(getApplicationContext(), "Create Tracking Session", Toast.LENGTH_SHORT).show();
mPreviewCapture = mPreviewCaptureBuilder.build();
mCaptureSession = session;
mCaptureSession.setRepeatingRequest(
mPreviewCapture,
mSessionCaptureCallback,
mBackgroundHandler
);
} catch(CameraAccessException e){
e.printStackTrace();
}
}
@Override
public void onConfigureFailed(CameraCaptureSession session) {
Toast.makeText(
getApplicationContext(),
"create Camera session failed!",
Toast.LENGTH_SHORT
).show();
}
}, null);
} catch(CameraAccessException e){
e.printStackTrace();
}
}
如您所见,我尝试使用该修复程序来捕获图像,但这无济于事,我仍然从预览中获得了一个转动图像。
如果可能的话,我想要一个解决方案,该解决方案试图更改相机的设置。我不想在通过绑定的图像范围内获得图像。
正确理解您的问题后,如果您还没有,我将尝试执行以下操作。我认为您的问题不存在于您的Previewiewcapturesession,而是在您的代码中拍摄照片。
我猜您正在使用cameradevice.template_still_capture模板使用其他caturerequest.builder。
对于此构建器,您必须设置JPEG方向。正如我在评论中已经说过的那样,有些相机设备具有90°,而另一些相机设备则旋转270°。
要设置适当的方向,请实现以下两个片段。
private static SparseIntArray ORIENTATIONS = new SparseIntArray();
static{
ORIENTATIONS.append(Surface.ROTATION_0, 0);
ORIENTATIONS.append(Surface.ROTATION_90, 90);
ORIENTATIONS.append(Surface.ROTATION_180, 180);
ORIENTATIONS.append(Surface.ROTATION_270, 270);
}
private int sensorToDeviceRotation(CameraCharacteristics cameraCharacteristics, int deviceOrientation){
int sensorOrientation = cameraCharacteristics.get(CameraCharacteristics.SENSOR_ORIENTATION);
deviceOrientation = ORIENTATIONS.get(deviceOrientation);
return (sensorOrientation + deviceOrientation + 360) % 360;
}
或使用您自己的逻辑/实现。
用于捕获图像的capturerequestbuilder,将jpeg_orientation设置为:
:int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, sensorToDevice(cameraCharacteristics, rotation));
这就是我在应用程序中捕获图像的方式,并且保存的图像正确旋转了!如果这是您的操作方式,我建议您添加代码实际拍照,而不仅仅是预览会话。
希望有帮助!