//初始化相机 private void initCamera() { mCamera.StopPreview(); if (null != mCamera) { Android.Hardware.Camera.Parameters myParam = mCamera.GetParameters(); //设置大小和方向等参数 myParam.SetPreviewSize(1280, 720); myParam.SetPictureSize(640, 480); myParam.SetRotation(90); myParam.Set("iso", 100); myParam.Set("jpeg-quality", 100); myParam.Zoom = 14; mCamera.SetDisplayOrientation(90); mCamera.SetParameters(myParam); mCamera.StartPreview(); //mCamera.SetPreviewCallback (this); } }