触摸Android缩放按钮 [英] Android scale button on touch

问题描述

我知道如何将按钮缩放到确定的值，但是是否有一种方法可以使用户每次触摸按钮时都增加/减小按钮的大小?像这样:

I know how to scale the button to a determinated value, but is there a way to increase/decrease the button size per time as long the user is touching it? Something like this:

Button myButton = (Button)findViewById(R.id.myButton);
    myButton.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
                // Some timer action here or is there a better way?
                v.setScaleX(v.getScaleX() + 0.1f);
                v.setScaleY(v.getScaleY() + 0.1f);
                return true;
            }
            else if(event.getAction() == MotionEvent.ACTION_UP) {
                v.setScaleX(1);
                v.setScaleY(1);
                return true;
            }

            return false;
        }
    });

其他想法-不起作用:

    myButton.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
                Timer timer = new Timer();
                TimerTask timerTask = new TimerTask() {
                    @Override
                    public void run() {
                      myButton.setScaleX(myButton.getScaleX() + 0.1f);
                      myButton.setScaleY(myButton.getScaleY() + 0.1f);
                    }
                };
                while(event.getAction() != MotionEvent.ACTION_UP){ //Seems to be an infinite loop
                    timer.schedule(timerTask, 100);
                }

            }
            else if(event.getAction() == MotionEvent.ACTION_UP) {
                v.setScaleX(1);
                v.setScaleY(1);
            }

            return false;
        }
    });

有没有办法用xml(可绘制和动画)来做整个事情?

And is there a way to do the whole thing with xml (drawable and animations)?

推荐答案

尝试以下操作:

@Override
public boolean onTouch(View v, MotionEvent motionEvent) {
    int action = motionEvent.getAction();
    if (action == MotionEvent.ACTION_DOWN) {
        v.animate().scaleXBy(100f).setDuration(5000).start();
        v.animate().scaleYBy(100f).setDuration(5000).start();
        return true;
    } else if (action == MotionEvent.ACTION_UP) {
        v.animate().cancel();
        v.animate().scaleX(1f).setDuration(1000).start();
        v.animate().scaleY(1f).setDuration(1000).start();
        return true;
    }

    return false;
}

这应该可以解决问题；)

This should do the trick ;)

这篇关于触摸Android缩放按钮的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！