如何在android中检测手指滑动
我尝试进行手指滑动,但未检测到。我尝试绘制一条路径,描述手指滑动的区域,但仅当我用力滑动时,才检测到滑动,否则未检测到滑动如何在android中检测手指滑动,android,swipe,touch-event,Android,Swipe,Touch Event,我尝试进行手指滑动,但未检测到。我尝试绘制一条路径,描述手指滑动的区域,但仅当我用力滑动时,才检测到滑动,否则未检测到滑动 public boolean onTouchEvent(MotionEvent event) { if (System.currentTimeMillis() - lastClick > 500) { lastClick = System.currentTimeMillis(); synchronized (getHolder()) {
public boolean onTouchEvent(MotionEvent event) {
if (System.currentTimeMillis() - lastClick > 500) {
lastClick = System.currentTimeMillis();
synchronized (getHolder()) {
int eventaction = event.getAction();
if(event.getPressure()>0.00001||event.getSize()>0.00001)
{
float a,b,c;
switch(eventaction)
{
case MotionEvent.ACTION_DOWN:
xdown = event.getX();
ydown =event.getY();
pres=true;
break;
case MotionEvent.ACTION_MOVE:
if(pres)
{
xmove = event.getX();
ymove =event.getY();
a = (float) Math.sqrt(Math.pow(xdown - xmove,2) +Math.pow( ydown - ymove,2));
b=(float) (xdown-(((xdown - xmove) / a) * 150));
c=(float) (ydown-((( ydown - ymove)/a)*150));
move.moveTo(xdown, ydown);
move.lineTo(b, c);
pres=false;
lmove=true;
}
break;
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_POINTER_UP:
move.reset();
xmove = 0;
ymove =0;
xdown=0;
ydown=0;
lmove=false;
pres=false;
break;
default:
return true;
}
}
}}
return true;
}
Android有一个这样的类。检查 我相信这是一个接触事件请参见此处的代码: 使用SimpleOnGestureListener是最简单的,如果重写onFling方法,则很容易/可能会重复