mCamera.set$p$pview{@override在previewFrame（）}不起作用

问题描述

• 我要的录制视频并分析当前位图的服务。


• 于是我在 onStartCommand 功能寄存器 surfaceHolder.addCallback 。


• ，并设置 mCamera.set previewCallback 在 surfaceCreated 功能。


• 当我启动服务，似乎上previewFrame 函数不工作。

我不知道为什么，任何人都可以给我一个忙吗？

下面是服务 onStartCommand 函数的我的code。

  @覆盖
    公众诠释onStartCommand（意向意图，诠释标志诠释startId）{
    如果（Util.checkCameraHardware（本））{
        mCamera = Util.getCameraInstance（）;
        如果（mCamera！= NULL）{
            SurfaceView SV =新SurfaceView（本）;            窗口管理WM =（窗口管理器）getSystemService（Context.WINDOW_SERVICE）;
            WindowManager.LayoutParams PARAMS =新WindowManager.LayoutParams（1，1，
                    WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY，
                    WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH，
                    PixelFormat.TRANSLUCENT）;
            SurfaceHolder SH = sv.getHolder（）;            sv.setZOrderOnTop（真）;
            sh.setFormat（PixelFormat.TRANSPARENT）;
            sh.addCallback（新SurfaceHolder.Callback（）{
                @覆盖
                公共无效surfaceCreated（SurfaceHolder持有人）{
                    Camera.Parameters PARAMS = mCamera.getParameters（）;
                    mCamera.setParameters（PARAMS）;
                    Camera.Parameters p值= mCamera.getParameters（）;                    清单＆LT; Camera.Size＆GT; LISTSIZE;                    LISTSIZE = p.getSupported previewSizes（）;
                    Camera.Size米previewSize = listSize.get（2）;
                    Log.v（TAG，preVIEW宽度=+ M previewSize.width
                            +preVIEW高度=+ M previewSize.height）;
                    P.SET previewSize（M previewSize.width，男previewSize.height）;                    LISTSIZE = p.getSupportedPictureSizes（）;
                    Camera.Size mPictureSize = listSize.get（2）;
                    Log.v（TAG，捕获宽度=+ mPictureSize.width
                            +捕获高度=+ mPictureSize.height）;
                    p.setPictureSize（mPictureSize.width，mPictureSize.height）;
                    mCamera.setParameters（P）;
                    尝试{
                        mCamera.set previewDisplay（支架）;    / ******************* ************ /
                        mCamera.set previewCallback（新相机。previewCallback（）{
                            @覆盖
                            在previewFrame（字节[]数据，相机摄像头）{公共无效
                                如果（_calibrationsLeft == -1）
                                    返回;                                如果（_calibrationsLeft大于0）{
                                    //做校准！                                    如果（_currentFaceDetectionThread！= NULL
                                            ＆功放;＆安培; _currentFaceDetectionThread.isAlive（））{
                                        //删除帧
                                        返回;
                                    }                                    //没有人脸检测启动或已完成
                                    _processTimeForLastFrame = System.currentTimeMillis的（）
                                             -  _lastFrameStart;
                                    _lastFrameStart = System.currentTimeMillis的（）;                                    如果（_currentFaceDetectionThread！= NULL）{
                                        _calibrationsLeft--;
                                        updateMeasurement（_currentFaceDetectionThread.getCurrentFace（））;                                        如果（_calibrationsLeft == 0）{
                                            doneCalibrating（）;
                                            返回;
                                        }
                                    }                                    _currentFaceDetectionThread =新FaceDetectionThread（数据，
                                            _ previewSize）;
                                    _currentFaceDetectionThread.start（）;                                }其他{
                                    //简单的测量                                    如果（_currentFaceDetectionThread！= NULL
                                            ＆功放;＆安培; _currentFaceDetectionThread.isAlive（））{
                                        //删除帧
                                        返回;
                                    }                                    //没有人脸检测启动或已完成
                                    _processTimeForLastFrame = System.currentTimeMillis的（）
                                             -  _lastFrameStart;
                                    _lastFrameStart = System.currentTimeMillis的（）;                                    如果（_currentFaceDetectionThread！= NULL）
                                        updateMeasurement（_currentFaceDetectionThread.getCurrentFace（））;                                    _currentFaceDetectionThread =新FaceDetectionThread（数据，
                                            _ previewSize）;
                                    _currentFaceDetectionThread.start（）;
                                }
                            }
                        }）;
     / ******************* *************************** /
                    }赶上（IOException异常五）{
                        e.printStackTrace（）;
                    }
                    mCamera.start preVIEW（）;
                    。MessageHUB.get（）的sendMessage（MessageHUB.LOG_ preVIEW，NULL）;
                    mCamera.unlock（）;
                    校准（）;
                }                @覆盖
                公共无效surfaceChanged（SurfaceHolder架，INT格式，诠释的宽度，高度INT）{
                }                @覆盖
                公共无效surfaceDestroyed（SurfaceHolder持有人）{
                }
            }）;
            wm.addView（SV，则params）;        }其他{
            Log.d（TAG，====从服务中获得相机失败）;        }
    }其他{
        Log.d（TAG，====有设备上没有摄像头的硬件。）;
    }    返回super.onStartCommand（意向，旗帜，startId）;
}
 

解决方案

您似乎停止surfacechanged

里面的摄像头preVIEW

  mCamera.stop preVIEW（）;
 

请尝试重新启动内部onSurfaceChanged preVIEW

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