package com.rex.utils; import android.graphics.ImageFormat; import android.hardware.Camera; import android.util.Log; public class CameraUtil { public static Camera mCamera = null; public static Camera.Size openCamera(boolean isFront) { if (mCamera != null) { throw new RuntimeException("camera already initialized"); } int mPosition; if(isFront){ mPosition= Camera.CameraInfo.CAMERA_FACING_FRONT; }else { mPosition=Camera.CameraInfo.CAMERA_FACING_BACK; } mCamera=Camera.open(mPosition); if (mCamera == null) { Log.e("Visionin", "No front-facing camera found; opening default"); mCamera = Camera.open(); // opens first back-facing camera } Camera.Parameters parms = mCamera.getParameters(); return parms.getPreviewSize(); } public static Camera.Size openCamera(int desiredWidth, int desiredHeight, boolean isFront) { if (mCamera != null) { throw new RuntimeException("camera already initialized"); } int mPosition; if(isFront){ mPosition= Camera.CameraInfo.CAMERA_FACING_FRONT; mCamera = Camera.open(mPosition); }else { mPosition=Camera.CameraInfo.CAMERA_FACING_BACK; mCamera=Camera.open(mPosition); } if (mCamera == null) { Log.e("Visionin", "No front-facing camera found; opening default"); mCamera = Camera.open(); // opens first back-facing camera } Camera.Parameters parms = mCamera.getParameters(); Camera.Size ppsfv = parms.getPreferredPreviewSizeForVideo(); if (ppsfv != null) { Log.e("Visionin", "Camera preferred preview size for video is " + ppsfv.width + "x" + ppsfv.height); parms.setPreviewSize(ppsfv.width, ppsfv.height); } for (Camera.Size size : parms.getSupportedPreviewSizes()) { if (size.width == desiredWidth && size.height == desiredHeight) { parms.setPreviewSize(desiredWidth, desiredHeight); break; } } parms.setRecordingHint(true); parms.setPreviewFormat(ImageFormat.NV21); mCamera.setParameters(parms); int[] fpsRange = new int[2]; parms.getPreviewFpsRange(fpsRange); return parms.getPreviewSize(); } public static void releaseCamera() { if (mCamera != null) { mCamera.stopPreview(); mCamera.release(); mCamera = null; Log.d("Visionin", "releaseCamera -- done"); } } }
