通过调整曝光解决

参考:

参考:

 

//设置预览请求的方式previewBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW); ... //自动对焦previewBuilder.set(CaptureRequest.CONTROL_AF_MODE,CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);//设置自动曝光帧率范围previewBuilder.set(CaptureRequest.CONTROL_AE_TARGET_FPS_RANGE,getRange()); //对焦触发器设置为空闲状态previewBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER,CaptureRequest.CONTROL_AF_TRIGGER_IDLE);captureSession.setRepeatingRequest(previewBuilder.build(),captureCallback, mainHandler);  private Range
        
          getRange() {        CameraManager mCameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);        CameraCharacteristics chars = null;        try {            chars = mCameraManager.getCameraCharacteristics(cameraID);        } catch (CameraAccessException e) {            e.printStackTrace();        }        Range
         
          [] ranges = chars.get(CameraCharacteristics.CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES);         Range
          
            result = null;         for (Range
           
             range : ranges) {            //帧率不能太低，大于10            if (range.getLower()<10)                continue;            if (result==null)                result = range;            //FPS下限小于15，弱光时能保证足够曝光时间，提高亮度。range范围跨度越大越好，光源足够时FPS较高，预览更流畅，光源不够时FPS较低，亮度更好。            else if (range.getLower()<=15 && (range.getUpper()-range.getLower())>(result.getUpper()-result.getLower()))                result = range;        }        return result;    }