图片未显示

Question

此处未显示图片。它在两天前工作，但我做了一些改变，出了点问题。这是我在jpeg Callback的onPictureTaken（byte []数据，Camera camera）方法中放置的代码。 logcat显示onPicture Taken Text但不显示前两个文本“callback recieved null data”和“bitmap not created”

预览是线性布局，其高度和宽度都与父级匹配。

输出显示空白屏幕。

    capture.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            captureStatus = 1 ;
            Camera.PictureCallback rawCallback = new Camera.PictureCallback() {

                @Override
                public void onPictureTaken(byte[] data, Camera camera) {
                    // TODO Auto-generated method stub

                    if (data == null) {
                        System.out.println("callback decieved null data");
                    }

                    mCamera = mPreview.stopCamera();
                    picture = BitmapFactory.decodeByteArray(data, 0, data.length, null);
                    Matrix mat = new Matrix();
                    mat.postRotate(90);
                    Bitmap newBitmap = Bitmap.createBitmap(picture, 0, 0, picture.getWidth(), picture.getHeight(), mat, true) ;
                    pic = new ImageView(c);
                    pic.setImageBitmap(newBitmap);
                    preview.removeAllViews();
                    preview.addView(pic);
                    preview.requestLayout();
                    System.out.println("On picture taken");

                }
            };

        try {
            mPreview.yCamera.takePicture(null, null,rawCallback);
        } catch (Exception e) {
        e.printStackTrace();
        }
        }
    });