android - 如何在 Android 上绘制下一个东西之前暂停 5 秒？

Question

说我要画一条线，然后等五秒钟，然后再画一条线。我有这样的方法:

    public void onDraw(Canvas canvas) {
        int w = canvas.getWidth();
        int h = canvas.getHeight();
        canvas.drawLine(w/2, 0, w/2, h-1, paint);
        // PAUSE FIVE SECONDS
        canvas.drawLine(0, h/2, w-1, h/2, paint);
    }

如何暂停？

Answer 1

你可以像这样使用 CountDownTimer :

public void onDraw(Canvas canvas) {
        int w = canvas.getWidth();
        int h = canvas.getHeight();
        canvas.drawLine(w/2, 0, w/2, h-1, paint);
        // PAUSE FIVE SECONDS
        new CountDownTimer(5000,1000){

            @Override
            public void onTick(long miliseconds){}

            @Override
            public void onFinish(){
               //after 5 seconds draw the second line
               canvas.drawLine(0, h/2, w-1, h/2, paint);
            }
        }.start();

    }

问候，