我做的SVG的路径和影像作品。我已加载SVG文件，并得到一个形象，尝试设置在画布上THI图像。但是画布不显示图像。我入住的高度和宽度，此图片/照片的无效支票，不为空，所以我无法理解，之所以画布不显示图像。任何帮助

我的code：

 公共类MainActivity延伸活动{    上下文℃;    @覆盖    公共无效的onCreate（捆绑savedInstanceState）{        super.onCreate（savedInstanceState）;        C = getApplicationContext（）;        的setContentView（新GameView（本））;    }    公共类GameView扩展视图{        私人诠释宽度，高度;        私人长期svgId;        画中画;        长的startTime;        浮动比例因子;        公共GameView（上下文的背景下）{            超级（上下文）;            SVG SVG = SVGParser.getSVGFromResource（getResources（），R.raw.android）;            照片= svg.getPicture（）;        }        @覆盖        保护无效onLayout（布尔变化，诠释离开，诠释顶部，右诠释，诠释底部）{            //获取可视面积            宽度=右 - 左;            高度=底 - 顶;        }        @覆盖        公共无效的onDraw（帆布油画）{            //画一个白色背景...            canvas.drawColor（Color.BLACK）;            如果（帆布！= NULL）            {                Toast.makeText（C，yahooooooooooooooooo+ picture.getHeight（），Toast.LENGTH_LONG）.show（）;                比例因子= Math.min（（浮动）的getHeight（）/ picture.getHeight（），（浮动）的getWidth（）/ picture.getWidth（））;                canvas.scale（（浮动）的比例因子，（浮点）比例因子）;                canvas.drawPicture（图片）;            }        }    }} 

解决方案

这是我用返回一个对象绘制，我将通过我的所有应用使用它的工作原理相当不错的。

 最后BitmapDrawable getSVG_Drawable    （INT svgResourceID，诠释的宽度，高度INT）{    //从资源中的SVG /原始图片。    最终SVG矢量=        SVGParser.getSVGFromResource（getResources（），svgResourceID）;    最后DisplayMetrics指标=新DisplayMetrics（）;    。getWindowManager（）getDefaultDisplay（）getMetrics（指标）。    //重绘图片到一个新的大小。    最后的BMP位图=        Bitmap.createBitmap（宽度，高度，Bitmap.Config.ARGB_8888）;    最后帆布CNV =新的Canvas（BMP）;    cnv.setDensity（（int）的（metrics.xdpi））;    cnv.drawPicture（vector.getPicture（），新的Rect（0，0，宽度，高度））;    最后BitmapDrawable DRW =新BitmapDrawable（getResources（），BMP）;    //返回绘制。    返回DRW;} 

I am doing a work on SVG Paths and Image. I have loaded SVG file and get an image and try to set thi image on canvas . But canvas is not showing image. I check the height and width and null check of this image/picture and it is not null so i am unable to understand that why canvas is not showing image. any help

My code:

public class MainActivity extends Activity{

    Context c;


    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);




        c=getApplicationContext();
        setContentView(new GameView(this));
    }


    public class GameView extends View{
        private int width, height;

        private long svgId;

        Picture picture;

        long startTime;
        float scaleFactor;

        public GameView(Context context) {
            super(context);



            SVG svg = SVGParser.getSVGFromResource(getResources(),R.raw.android);
            picture = svg.getPicture();




        }



        @Override

        protected void onLayout (boolean changed, int left, int top, int right, int bottom) {

            // get visible area

            width = right - left;

            height = bottom - top;

        }



        @Override

        public void onDraw(Canvas canvas) {

            // paint a white background...

            canvas.drawColor(Color.BLACK);

            if (canvas!=null)
            {
                Toast.makeText(c, "yahooooooooooooooooo"+picture.getHeight(), Toast.LENGTH_LONG).show();

                scaleFactor=Math.min((float)getHeight()/picture.getHeight(),(float)getWidth()/picture.getWidth());
                canvas.scale((float)scaleFactor,(float)scaleFactor);
                canvas.drawPicture(picture);
            }

        }

    }
}

This is what I use to return a drawable object that I will use through all my app It works quite well.

final BitmapDrawable getSVG_Drawable
    (int svgResourceID, int width, int height)
{
    // Get a Picture from the SVG in res/raw.
    final SVG vector =
        SVGParser.getSVGFromResource(getResources(), svgResourceID);

    final DisplayMetrics metrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(metrics);

    // Redraw the picture to a new size.
    final Bitmap bmp =
        Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    final Canvas cnv = new Canvas(bmp);
    cnv.setDensity((int) (metrics.xdpi));

    cnv.drawPicture(vector.getPicture(), new Rect(0, 0, width, height));
    final BitmapDrawable drw = new BitmapDrawable(getResources(), bmp);

    // Return the drawable.
    return drw;
}