比例位图SurfaceView

Question

这是我的代码在Sprite类：

public class Sprite { 
    int x, y, vx, vy; 
    private Bitmap texture; 

    public Sprite(Bitmap texture) { 
     this.texture = texture; 
    } 

    public int getWidth() { 
     return texture.getWidth(); 
    } 

    public int getHeight() { 
     return texture.getHeight(); 
    } 

    public void draw(Canvas c) { 
     c.drawBitmap(texture, x, y, null); 
    } 
} 

与background.draw(c);我画的背景。但是背景比屏幕大...

如何将它缩放到屏幕大小？

Answer 1

绘制时只设置位图的左侧属性和顶部属性。为了扩展它，叫过载drawBitmap方法与宽度和高度，like this one

为了让你的想法：

public class Sprite { 
    int width, height; 
    private Bitmap texture; 

    public Sprite(Bitmap texture, width, height) { 
     this.texture = texture; 
     this.width = width; 
     this.height = height; 
    } 

    public int getWidth() { 
     return width; 
    } 

    public int getHeight() { 
     return height; 
    } 

    public void setWidth(int width) { 
     this.width = width; 
    } 

    public void setHeight(int height) { 
     this.height = height; 
    } 

    public void draw(Canvas c) { 
     c.drawBitmap(texture, null, new RectF(0, 0, width, height), null); 
    } 
} 

在活动，其中创建类雪碧，你必须做一些事情，如：

Display display = getWindowManager().getDefaultDisplay(); 
Sprite sprite = new Sprite(bitmap, display.getWidth(), display.getHeight())