1、开启关闭闪光灯

/**

* 通过设置Camera打开闪光灯

*/

public synchronized void turnLightOn() {

if (camera == null) {

return;

}

parameters = camera.getParameters();

if (parameters == null) {

return;

}

parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);

camera.setParameters(parameters);

}

/**

* 通过设置Camera关闭闪光灯

*/

public synchronized void turnLightOff() {

if (camera == null) {

return;

}

parameters = camera.getParameters();

if (parameters == null) {

return;

}

parameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);

camera.setParameters(parameters);

}

2、切换前后摄像头

private int mCameraId = Camera.CameraInfo.CAMERA_FACING_BACK;

//现在是后置，变更为前置

if (camera != null && mCameraId == Camera.CameraInfo.CAMERA_FACING_BACK) {

closeCamera();

camera = Camera.open(Camera.CameraInfo.CAMERA_FACING_FRONT);//打开当前选中的摄像头

try {

amera.setPreviewDisplay(surfaceHolder);//通过surfaceview显示取景画面

camera.autoFocus(CameraManager.get().getAutoFocusCallback());

camera.setDisplayOrientation(getPreviewDegree());

} catch (IOException e) {

e.printStackTrace();

}

camera.startPreview();//开始预览

mCameraId = Camera.CameraInfo.CAMERA_FACING_FRONT;

} else if (mCameraId == Camera.CameraInfo.CAMERA_FACING_FRONT) {

closeCamera();

camera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);//打开当前选中的摄像头

try {

camera.setPreviewDisplay(surfaceHolder);//通过surfaceview显示取景画面

camera.autoFocus(CameraManager.get().getAutoFocusCallback());

camera.setDisplayOrientation(getPreviewDegree());

} catch (IOException e) {

e.printStackTrace();

}

camera.startPreview();//开始预览

mCameraId = Camera.CameraInfo.CAMERA_FACING_BACK;

}

public void closeCamera() {

if (camera != null) {

camera.stopPreview();//停掉原来摄像头的预览

camera.release();//释放资源

camera = null;//取消原来摄像头

CameraManager.get().getPreviewCallback().setHandler(null, 0);

CameraManager.get().getAutoFocusCallback().setHandler(null, 0);

CameraManager.get().setPreviewing(false);

}

}

// 提供一个静态方法，用于根据手机方向获得相机预览画面旋转的角度

private int getPreviewDegree() {

// 获得手机的方向

int rotation = getActivity().getWindowManager().getDefaultDisplay().getRotation();

int degree = 0;

// 根据手机的方向计算相机预览画面应该选择的角度

switch (rotation) {

case Surface.ROTATION_0:

degree = 90;

break;

case Surface.ROTATION_90:

degree = 0;

break;

case Surface.ROTATION_180:

degree = 270;

break;

case Surface.ROTATION_270:

degree = 180;

break;

}

return degree;

}