我正在尝试手指滑动,但未检测到。我正在尝试绘制一条描述手指滑动区域的路径,但只有当我用力滑动时才会滑动检测到,否则检测不到
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;
}
答案 0 :(得分:0)
Android有一个类。检查http://developer.android.com/reference/android/view/GestureDetector.html 我相信这是触摸事件之一
答案 1 :(得分:0)
请参阅此处的代码:Simple swipe gesture to activity tutorial?
使用SimpleOnGestureListener是最简单的,如果你覆盖onFling方法,很容易/