[英]Stopping thread.run() from an outside method
我在Android中檢測到兩指點按與兩指滾動。 來自運動事件的反饋使得順序為:
2 fingers down (repeated many times)
1 finger down (repeated a few times)
back to 2 fingers down (this indicates a longer hold than a tap. In my case we'll call this scrolling)
要么
2 fingers down
1 finger down
no action for a few milliseconds, which will indicate that there has been a quick 2 finger tap.
基本上,我希望我的代碼執行此操作:如果有1個手指向下並且之前有2個手指向下,請等待幾毫秒以查看是否有另一個手指返回或什么也沒發生。 如果另一根手指返回,請停止等待。 如果什么也沒發生,那就有水龍頭了。
public boolean onGenericMotionEvent(MotionEvent event) {
int numFingers = event.getPointerCount();
switch (event.getActionIndex()){
case (MotionEvent.ACTION_DOWN):
if (waitThread != null){
stateChange=true;
}
if (numFingers==2){
hasHadTwoDown=true;
}
if (numFingers==1){
//FIRE A THREAD THAT WAITS
if (hasHadTwoDown){
waitThread = new WaitThread();
waitThread.run();
}
}
}
gestureDetector.onTouchEvent(event);
}
和線程
private class WaitThread extends Thread {
public WaitThread(){
stateChange=false;
}
@Override
public void run(){
Log.i("myGesture", "thread is running");
long startTime = Calendar.getInstance().getTimeInMillis();
while(!stateChange && Calendar.getInstance().getTimeInMillis() - startTime < 100){
//wait until getting a notification that state changes or timeout
}
if (stateChange){
waitThread=null;
//no double click
return;
}
//double click
Log.i("myGesture", "double click");
hasHadTwoDown=false;
waitThread=null;
}
}
目前,該線程運行完畢,並且沒有收到來自MotionEvent的任何通知。 線程運行時,MotionEvents不會通過。 我應該使用哪種同步?
編輯 :我已經完成了該項目的工作版本。 可從https://github.com/ctuna/MultiTouch獲得
使用waitThread.start,而不是.run。
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