4

我想部分放大画布板，因为字母托盘按钮将被固定并且板将被缩放，
部分编码如下所述，屏幕完全绘制在画布中，可以在底部看到..请帮助并感谢您的关注。

        public class BoardView extends SurfaceView implements SurfaceHolder.Callback
                {
        class DrawingThread extends Thread implements OnTouchListener {

        public DrawingThread(SurfaceHolder holder, Handler handler) {
                    mSurfaceHolder = holder;

        public void setRunning(boolean b) {
                    mRun = b;
                }

                @Override
                public void run() {
                    while (mRun) {
                        Canvas c = null;
                        try {
                            c = mSurfaceHolder.lockCanvas(null);

        synchronized (mSurfaceHolder) {
                                // System.gc();
                                // c.scale(canvasScaleX, canvasScaleY);
                                // c.save();
                                // c.translate(canvasTranslateX, canvasTranslateY);
                                doDraw(c);
                            }

                            updateGame();
                        } finally {
                            if (c != null) {
                                mSurfaceHolder.unlockCanvasAndPost(c);
                            }
                        }
        }

        private void doDraw(Canvas canvas) {
                    if (ge == null)
                        return;

                        Rect bRect = new Rect(0, 0, dims.getTotalWidth(),
                        dims.getScoreHeight() + dims.getBoardheight());
                Drawable drawable = getResources().getDrawable(R.drawable.board);
                drawable.setBounds(bRect);

                drawable.draw(canvas);

                Rect tRect = new Rect(0, dims.getScoreHeight()
                        + dims.getBoardheight(), dims.getTotalWidth(),
                        dims.getTotalHeight());
                canvas.drawRect(tRect, fillTrayPaint);

                int topHeight = dims.getScoreHeight() + dims.getBoardheight();
                int bottom = (dims.getTotalHeight() + 5)
                        - (dims.getTotalWidth() / Tray.TRAY_SIZE);
                Rect rect = new Rect(0, topHeight, dims.getTotalWidth(), bottom - 7);
                Drawable drawableTray = getResources()
                        .getDrawable(R.drawable.strip);
                drawableTray.setBounds(rect);
                drawableTray.draw(canvas);
                        drawTray(canvas);
                drawBoard(canvas);

                // drawScore(canvas);
                drawMovingTile(canvas);
            }


public BoardView(Context context, AttributeSet attrs) {
        super(context, attrs);

        SurfaceHolder holder = getHolder();
        holder.addCallback(this);

        // endTurn=(ImageButton)findViewById(R.id.endturn_button_horizontal);
        thread = new DrawingThread(holder, handler);
    }
@Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        final float scale1 = getResources().getDisplayMetrics().density;
        defaultFontSize = (int) (MIN_FONT_DIPS * scale1 + 0.5f);
        thread.setDefaultFontSize(defaultFontSize);
        dimensions = calculateDimensions(getWidth(), getHeight());
        thread.setDimensions(dimensions);

        thread.setRunning(true);

        // if (thread != null && !thread.isAlive())
        thread.start();
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        boolean retry = true;
        thread.setRunning(false);
        while (retry) {
            try {
                thread.join();
                retry = false;
            } catch (InterruptedException e) {

            }
        }
    }

屏幕完全绘制在画布中，如下所述：-

4

4 回答 4

2

我们可以简单地通过 canvas.clipRect(rectangle) 来完成，此时我们要做的是保存画布 canvas.save() 并在 canvas.clipRect(rectangle) 之后调用 canvas.restore()。

于 2012-09-25T13:30:32.987 回答
1

考虑尝试这样的事情：

  • 从要放大的画布创建位图。
  • 当将该位图渲染到屏幕上时，您可以更改 scr rect（它将“放大”到位图）。

我希望这有帮助。

于 2012-08-09T13:51:50.643 回答
0

我认为你需要将你的游戏板渲染成屏幕外位图，然后在画布上使用 绘制这个位图Matrix，这样你就可以改变它的位置和比例。

于 2012-07-30T12:06:07.367 回答
0

我相信最简单的方法是使用Canvas#scale(float scale, int pivotx, int pivoty)方法。它基本上均匀地增长了整个画布，这实际上是从 2D 角度来看的缩放。

canvas.scale(2.0f, getWidth()/2, getHeight()/2)将从中心按 2 缩放图像。 canvas.scale(1.0f, getWidth()/2, getHeight()/2)会把它缩回去。

我从来没有在这种情况下尝试过，所以如果你决定尝试它，请报告结果！我想知道以供将来参考。

于 2012-08-09T14:01:29.587 回答