应用程序通过空面，拍摄图像时没有surfaceview

问题描述

我正在写一个Android应用程序。遇到这样的问题：

I'm writing an android app. I encounter the following problem:

应用传递NULL表面的

app passed NULL surface

在执行下列code：

    public void takePictureNoPreview(Context context){
            try {
                myCamera = Camera.open(0);
            } catch (Exception e) {
                e.printStackTrace();
                console.append("Failed to connect to camera\n");
            }
            if(myCamera!=null){
                SurfaceView dummy=new SurfaceView(context);
                try {
                    myCamera.setPreviewDisplay(dummy.getHolder());
                    myCamera.startPreview(); 
                    myCamera.takePicture(null, null, getJpegCallback());
                } 
                catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }    
                finally
                {
                    myCamera.stopPreview();
                    myCamera.release();
                }
            }  

主要目标是拍摄照片没有surfaceview，为了存储，并通过电子邮件迅速发送越好。

The main goal is to take a picture without the surfaceview, in order to store it and send via email as quickly as possible.

在此先感谢。

推荐答案

我觉得你应该先实现接口SurfaceHolder.Callback，然后添加回调到保持第一，例如，

I think you should implement the interface SurfaceHolder.Callback first,and then add callback to the holder first,e.g.

mHolder.addCallback(callback)
myCamera.setPreviewDisplay(mHolder);
myCamera.startPreview(); 

我认为这将是OK !!

I think it will be ok!!

如果您有任何问题，你可以参考一下1.my https://github.com/RyanLiuNtust/Lecture-of-Android/树/ camera_lecture

If you have any problems, you can refer to1.my https://github.com/RyanLiuNtust/Lecture-of-Android/tree/camera_lecture

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