Question

我正在开发一个需要在previewcallback（）函数中处理每一帧预览的Android应用程序，我的代码是这样的：

Camera c = null;

        try {
            c = Camera.open(1); // attempt to get a Camera instance

        }
        catch (Exception e){
            // Camera is not available (in use or does not exist)
        }
        Camera.Size csize = c.getParameters().getPreviewSize();
        int mPreviewHeight = csize.height; //
        int mPreviewWidth = csize.width;
        Camera.Parameters parameters = c.getParameters();
        parameters.setPictureSize(800, 800);
       // parameters.setPreviewSize(700, 700);
        parameters.set("orientation", "portrait");
        c.setDisplayOrientation(90);
        c.setParameters(parameters);
        mPreview = new CameraPreview(this, c);
        FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);

        preview.addView(mPreview);
        final PreviewCallback mPicture = new PreviewCallback() {

            public void onPreviewFrame(byte[] data, Camera camera)  
            { 
                    try 
                    { 
                            BitmapFactory.Options opts = new BitmapFactory.Options(); 
                            Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);//,opts); 
                            Log.i("file","Bitmap captured");
                    } 
                    catch(Exception e) 
                    {

                    } 
            } 

        };

        c.setPreviewCallback(mPicture);

但看起来日志“位图捕获”从未显示过，这意味着previewcallback功能没有正常运行，有人可以帮我这个吗？提前谢谢！

Answer 1

您的CameraPreview课程中包含哪些内容？

我认为你在某个地方呼叫c.startPreview()？

预览回调无法正常运行

1 个答案: