即使roid子鼓励为此使用布局(因为有几处大小,用布局的屏幕质量分辨率在所有装置上都有相同的方面)。

你们可以采取另外2种方式来做到这一点。

(1) 改变一切开放的观点^,但为了获得蚊虫而 out。

2) 形成你自己的观点,凌驾于Draw(canvas)之上,并自行推展。

我必须警告你,我们真心想正确对待坎波斯的所有绘画立场。

edit here is some code to get you started on creating your views programatically, I also added the touch test.

(one thing I want to draw your attention: there is a image.getWidth() (actual size of the picture) and a image.getScaledWidth(canvas) which give you the size of the element in dp which means how big it will appear on the screen)

public class MainMenuView extends PixelRainView{
    private Bitmap bmpPlay = null;
    private float playLeft = 0;
    private float playRight = 0;
    private float playBottom = 0;
    private float playTop = 0;

    public MainMenuView(Context context, AttributeSet attrs) {
        super(context,attrs);
    }



    @Override
    public void unLoadBitmaps() {
        super.unLoadBitmaps();
        if(bmpPlay != null){
            bmpPlay.recycle();
            bmpPlay = null;
        }
    }



    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if(bmpPlay == null){
            bmpPlay = getBitmapFromRessourceID(R.drawable.play_bt);
            playLeft = (this.getWidth()-bmpPlay.getScaledWidth(canvas))/2; 
            playRight = playLeft + bmpPlay.getScaledWidth(canvas);
            playTop = (this.getHeight()-bmpPlay.getScaledHeight(canvas))/2;
            playBottom = playTop+bmpPlay.getScaledHeight(canvas);
        }
        canvas.drawBitmap(bmpPlay,playLeft, playTop, null);

        }       
    }


    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
    }



    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if(event.getAction() == MotionEvent.ACTION_DOWN){
            float x = event.getX();
            float y = event.getY();
            //test central button
            if(x>playLeft && x<playRight && y<playBottom && y>playTop){
                Log.e("jason", "touched play");
                PixelRainView.changeView(R.layout.composedlayoutgroup);
            }
        return super.onTouchEvent(event);
    }
}