Android Camera2 API显示摄像头特性

本文关键字：摄像头 显示 Camera2 API Android | 更新日期: 2023-09-27 18:11:59

我不习惯c#/移动编程/Xamarin，所以请不要因为我愚蠢的错误而责备我。我想编一个程序来展示我设备上的摄像头的功能。下面是一个示例代码:

TextView a = new TextView (this);
A = Java.Lang.Integer ((int)CameraCharacteristics.ColorCorrectionAvailableAberrationModes);

和错误:

"CameraCharacteristics.ColorCorrectionAvailableAberrationModes must declare a body because it is not marked abstract extern or partial"

我该怎么办?

Android Camera2 API显示摄像头特性

下面是用java打印几个camera2 Api特征的代码。您可以使用相同的概念并尝试在c#中实现。这可能不是有效的代码，但可以满足您的目的。

有些特性在某些手机上不起作用，所以这取决于你使用什么手机进行测试。我试用了Nexus 5和联想手机。

流配置映射特征。从这个链接:

private void setupCamera(int width, int height) {
 CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
    try {
        for(String cameraId: cameraManager.getCameraIdList()) {
            CameraCharacteristics cameraCharacteristics = cameraManager.getCameraCharacteristics(cameraId);
            if(cameraCharacteristics.get(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_FRONT) {
                continue;
            }
            StreamConfigurationMap map = cameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
//GET OUTPUT SIZES
mOutputsize = map.getOutputSizes(SurfaceTexture.class);
for(int i=0; i<mOutputsize.length; i++) {
    Log.d("OUTPUT SIZES", String.valueOf(mOutputsize[i]));
}
//GET HIGH SPEED VIDEO SIZE
//All the sizes listed in this method are the subset of getOutputSizes(int) method
 mHighSpeedVideoSize = map.getHighSpeedVideoSizes();
 for(int j=0; j<mHighSpeedVideoSize.length; j++) {
      Log.d("OUTPUT SIZES", "High speed video sizes");
      Log.d("OUTPUT SIZES", mHighSpeedVideoSize[j].toString());
 }
//GET THE IMAGE OUTPUT FORMAT (make sure you check if the array is pointing is null or not, otherwise you will have null point exception. The best way is to comment and see one by one)
 mOutputFormat = map.getOutputFormats();
 Log.d("OUTPUT SIZES", "Image Output Format: ");
 Log.d("OUTPUT SIZES", "Image.format = RAW_SENSOR, Constant Value: 32 (0x00000020) " + String.valueOf(mOutputFormat[0]));
 Log.d("OUTPUT SIZES", "Image.format = JPEG, Constant Value: 256 (0x00000100) " + String.valueOf(mOutputFormat[1]));
 Log.d("OUTPUT SIZES", "Image.format = PRIVATE, Constant Value: 34 (0x00000022) " + String.valueOf(mOutputFormat[2]));
 Log.d("OUTPUT SIZES", "Image.format = YUV_420_888, Constant Value: 35 (0x00000023) " + String.valueOf(mOutputFormat[3]));

我甚至试着从这个链接打印一些特征。下面是:

//COLOR_CORRECTION_AVAILABLE_ABERRATION_MODES
  int[] aberration = cameraCharacteristics.get(CameraCharacteristics.COLOR_CORRECTION_AVAILABLE_ABERRATION_MODES);
  String str2;
  for(int i=0; i<aberration.length; i++) {
       str2 = String.valueOf(aberration[i]);
       Log.d("OUTPUT SIZES ABR ", str2);
    }
       Log.d("OUTPUT SIZES Length: ", String.valueOf(aberration.length));
//CONTROL_AE_COMPENSATION_RANGE
 Range<Integer> exposureRange = cameraCharacteristics.get(CameraCharacteristics.CONTROL_AE_COMPENSATION_RANGE);
 String maxRange = String.valueOf(exposureRange);
 Log.d("OUTPUT SIZES EXPO range", maxRange + "'n");
//CONTROL_AE_COMPENSATION_STEP
  Rational step = cameraCharacteristics.get(CameraCharacteristics.CONTROL_AE_COMPENSATION_STEP);
  Log.d("OUTPUT SIZE COMP step", String.valueOf(step));

//CONTROL_AE_LOCK_AVAILABLE
  boolean lock = cameraCharacteristics.get(CameraCharacteristics.CONTROL_AE_LOCK_AVAILABLE);
  Log.d("OUTPUT SIZES LOCK avai", String.valueOf(lock));

 //CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES
  int[] videoStabilizationModes = cameraCharacteristics.get(CameraCharacteristics.CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES);
   for(int i=0; i<videoStabilizationModes.length; i++) {
       Log.d("OUTPUT SIZES STABI mode", String.valueOf(videoStabilizationModes[i]));
    }
 //CONTROL_MAX_REGIONS_AWB
   Integer regionsAWB = cameraCharacteristics.get(CameraCharacteristics.CONTROL_MAX_REGIONS_AWB);
   Log.d("OUTPUT SIZES REGION AWB", String.valueOf(regionsAWB));
 //JPEG_AVAILABLE_THUMBNAIL_SIZES
  Size[] jpegThumbnail = cameraCharacteristics.get(CameraCharacteristics.JPEG_AVAILABLE_THUMBNAIL_SIZES);
  for(int i=0; i<jpegThumbnail.length; i++) {
  Log.d("OUTPUT SIZES JPEG THUMB", String.valueOf(jpegThumbnail[i]));
  }

 //SENSOR_BLACK_LEVEL_PATTERN
  BlackLevelPattern blackLevelPattern = cameraCharacteristics.get(CameraCharacteristics.SENSOR_BLACK_LEVEL_PATTERN);
  Log.d("OUTPUT SIZES BLCK PTRN", String.valueOf(blackLevelPattern));

   mCameraId = cameraId;
            return;
        }
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}

PS:这不是完整的代码。这是我为这个答案为相机应用程序编写的代码片段。我想你只需要知道它的特点。我在代码中使用了一些变量，但没有在这个答案中声明。我认为你现在不需要这些信息。快乐编码:)

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