数据采集
Android端
重写onTouchEvent,收集event数据,以一定的编码传输
public boolean onTouchEvent(MotionEvent event){
String rec="";
int pointerCount = event.getPointerCount();
if (pointerCount > MAX_TOUCHPOINTS) {
pointerCount = MAX_TOUCHPOINTS;
}
int opt=event.getAction();
boolean isFirst=true;
if(opt==2){
for (int i = 0; i < pointerCount; i++) {
int id = event.getPointerId(i);
int x = (int) event.getX(i);
int y = (int) event.getY(i);
if(isFirst){isFirst=false;}
else rec+=";";
rec+=id+",2,"+x+","+y;
}
}else if(opt==0||(opt-5)%256==0){
//为了简化,我们假设这过程不会进行MOVE
int ind=(event.getAction()-5)/256;
for (int i = 0; i < pointerCount; i++) {
if(i==ind){
int id = event.getPointerId(i);
int x = (int) event.getX(i);
int y = (int) event.getY(i);
if(isFirst){isFirst=false;}
else rec+=";";
rec+=id+",0,"+x+","+y;
break;
}
}
}else if(opt==1||(opt-6)%256==0){
int ind=(event.getAction()-6)/256;
for (int i = 0; i < pointerCount; i++) {
if(i==ind){
int id = event.getPointerId(i);
if(isFirst){isFirst=false;}
else rec+=";";
rec+=id+",1";
break;
}
}
}
return true;
}