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package you.xiaochen.camera; import android.app.Application; import android.graphics.Rect; import android.graphics.RectF; import android.graphics.SurfaceTexture; import android.hardware.Camera; import android.media.CamcorderProfile; import android.media.MediaRecorder; import android.widget.Toast; import java.util.ArrayList; import java.util.List; import you.xiaochen.utils.LogUtils; /** * Created by you on 2016/10/22. * 相机管理类 */ public final class CameraManager { private Application context; /** * camera */ private Camera mCamera; /** * 视频录制 */ private MediaRecorder mMediaRecorder; /** * 相机闪光状态 */ private int cameraFlash; /** * 前后置状态 */ private int cameraFacing = Camera.CameraInfo.CAMERA_FACING_BACK; /** * 是否支持前置摄像,是否支持闪光 */ private boolean isSupportFrontCamera, isSupportFlashCamera; /** * 录制视频的相关参数 */ private CamcorderProfile mProfile; /** * 0为拍照, 1为录像 */ private int cameraType; private CameraManager(Application context) { this.context = context; isSupportFrontCamera = CameraUtils.isSupportFrontCamera(); isSupportFlashCamera = CameraUtils.isSupportFlashCamera(context); if (isSupportFrontCamera) { cameraFacing = CameraUtils.getCameraFacing(context, Camera.CameraInfo.CAMERA_FACING_BACK); } if (isSupportFlashCamera) { cameraFlash = CameraUtils.getCameraFlash(context); } } private static CameraManager INSTANCE; public static CameraManager getInstance(Application context) { if (INSTANCE == null) { synchronized (CameraManager.class) { if (INSTANCE == null) { INSTANCE = new CameraManager(context); } } } return INSTANCE; } /** * 打开camera */ public void openCamera(SurfaceTexture surfaceTexture, int width, int height) { if (mCamera == null) { mCamera = Camera.open(cameraFacing);//打开当前选中的摄像头 mProfile = CamcorderProfile.get(cameraFacing, CamcorderProfile.QUALITY_HIGH); try { mCamera.setDisplayOrientation(90);//默认竖直拍照 mCamera.setPreviewTexture(surfaceTexture); initCameraParameters(cameraFacing, width, height); mCamera.startPreview(); } catch (Exception e) { LogUtils.i(e); if (mCamera != null) { mCamera.release(); mCamera = null; } } } } /** * 开启预览,前提是camera初始化了 */ public void restartPreview() { if (mCamera == null) return; try { Camera.Parameters parameters = mCamera.getParameters(); int zoom = parameters.getZoom(); if (zoom > 0) { parameters.setZoom(0); mCamera.setParameters(parameters); } mCamera.startPreview(); } catch (Exception e) { LogUtils.i(e); if (mCamera != null) { mCamera.release(); mCamera = null; } } } private void initCameraParameters(int cameraId, int width, int height) { Camera.Parameters parameters = mCamera.getParameters(); if (cameraId == Camera.CameraInfo.CAMERA_FACING_BACK) { List<String> focusModes = parameters.getSupportedFocusModes(); if (focusModes != null) { if (cameraType == 0) { if (focusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) { parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE); } } else { if (focusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) { parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO); } } } } parameters.setRotation(90);//设置旋转代码, switch (cameraFlash) { case 0: parameters.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO); break; case 1: parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH); break; case 2: parameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF); break; } List<Camera.Size> pictureSizes = parameters.getSupportedPictureSizes(); List<Camera.Size> previewSizes = parameters.getSupportedPreviewSizes(); if (!isEmpty(pictureSizes) && !isEmpty(previewSizes)) { /*for (Camera.Size size : pictureSizes) { LogUtils.i("pictureSize " + size.width + " " + size.height); } for (Camera.Size size : pictureSizes) { LogUtils.i("previewSize " + size.width + " " + size.height); }*/ Camera.Size optimalPicSize = getOptimalSize(pictureSizes, width, height); Camera.Size optimalPreSize = getOptimalSize(previewSizes, width, height); LogUtils.i("TextureSize "+width+" "+height+" optimalSize pic " + optimalPicSize.width + " " + optimalPicSize.height + " pre " + optimalPreSize.width + " " + optimalPreSize.height); parameters.setPictureSize(optimalPicSize.width, optimalPicSize.height); parameters.setPreviewSize(optimalPreSize.width, optimalPreSize.height); mProfile.videoFrameWidth = optimalPreSize.width; mProfile.videoFrameHeight = optimalPreSize.height; mProfile.videoBitRate = 5000000;//此参数主要决定视频拍出大小 } mCamera.setParameters(parameters); } /** * 释放摄像头 */ public void closeCamera() { this.cameraType = 0; if (mCamera != null) { try { mCamera.stopPreview(); mCamera.release(); mCamera = null; } catch (Exception e) { LogUtils.i(e); if (mCamera != null) { mCamera.release(); mCamera = null; } } } } /** * 集合不为空 * * @param list * @param <E> * @return */ private <E> boolean isEmpty(List<E> list) { return list == null || list.isEmpty(); } /** * 获取最佳预览相机Size参数 * * @return */ private Camera.Size getOptimalSize(List<Camera.Size> sizes, int w, int h) { Camera.Size optimalSize = null; float targetRadio = h / (float) w; float optimalDif = Float.MAX_VALUE; //最匹配的比例 int optimalMaxDif = Integer.MAX_VALUE;//最优的最大值差距 for (Camera.Size size : sizes) { float newOptimal = size.width / (float) size.height; float newDiff = Math.abs(newOptimal - targetRadio); if (newDiff < optimalDif) { //更好的尺寸 optimalDif = newDiff; optimalSize = size; optimalMaxDif = Math.abs(h - size.width); } else if (newDiff == optimalDif) {//更好的尺寸 int newOptimalMaxDif = Math.abs(h - size.width); if (newOptimalMaxDif < optimalMaxDif) { optimalDif = newDiff; optimalSize = size; optimalMaxDif = newOptimal