Question

我已经编写了自己的相机活动，我在FrameLayout中显示了照片的实时预览，但实时图片看起来不自然，有点高，我认为这是因为{的尺寸{1}}与相机的尺寸不匹配。我该怎么做才能解决它？

以下是相机活动的xml文件：

FrameLayout

Answer 1

您必须缩放从相机拍摄的图像。你可以尝试这样的事情：

private Bitmap scaleImage(ImageView imageView, String path) {
int targetWidth = imageView.getWidth();
int targetHeight = imageView.getHeight();

BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
bitmapOptions.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, bitmapOptions);
int photoWidth = bitmapOptions.outWidth;
int photoHeight = bitmapOptions.outHeight;

int scaleFactor = Math.min(photoWidth / targetWidth, photoHeight / targetHeight);

bitmapOptions.inJustDecodeBounds = false;
bitmapOptions.inSampleSize = scaleFactor;
bitmapOptions.inPurgeable = true;

return BitmapFactory.decodeFile(path, bitmapOptions);

}

Answer 2

问题可以这样解决：

        Parameters cameraParam =  mCamera.getParameters() ;
        double ratio = (double)cameraParam.getPictureSize().height / (double)cameraParam.getPictureSize().width  ;
        Display display = getWindowManager().getDefaultDisplay();
        Point size = new Point();
        try
        {
            display.getSize(size);
        }
        catch(java.lang.NoSuchMethodError ignore)
        {
            size.x = display.getWidth(); 
            size.y = display.getHeight() ;
        }
        int width = size.y;
        int height = size.x;
        previewParam.width =  width;
        previewParam.height = (int)(previewParam.width / ratio) ;

Android：相机的尺寸与屏幕尺寸不匹配

2 个答案: