我知道如何将按钮缩放到一个确定的值,但是只要用户触摸它,有没有办法每次增加/减少按钮大小? 像这样:
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)完成整个事情?
答案 0 :(得分:8)
尝试以下方法:
@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;)
答案 1 :(得分:0)
从API 21(Lollipop)开始,基于stateListAnimator属性的纯XML解决方案可用。以this answer中的similar question为例。