解决方法
从API级别21开始是可能的.从文档(
https://developer.android.com/reference/android/hardware/camera2/CameraCharacteristics.html#SENSOR_INFO_PHYSICAL_SIZE)：
public static final Key SENSOR_INFO_PHYSICAL_SIZE
The physical dimensions of the full pixel array. […]
Units: Millimeters
我用这种代码.请注意,可能不仅仅是一台摄像头：
import android.hardware.camera2.CameraAccessException;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CameraManager;
private SizeF getCameraResolution(int camNum)
{
SizeF size = new SizeF(0,0);
CameraManager manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
try {
String[] cameraIds = manager.getCameraIdList();
if (cameraIds.length > camNum) {
CameraCharacteristics character = manager.getCameraCharacteristics(cameraIds[camNum]);
size = character.get(CameraCharacteristics.SENSOR_INFO_PHYSICAL_SIZE);
}
}
catch (CameraAccessException e)
{
Log.e("YourLogString",e.getMessage(),e);
}
return size;
}
请注意,需要捕获Exception CameraAccessException.
别忘了添加< uses-sdk android：minSdkVersion =“21”/>到你的清单.
