1
onStopTrackingTouch事件被激發兩次,這是一個問題,因爲我只需要創建一個getRequest。這裏是我的代碼:MotionEvent.ACTION_UP事件使用seekbar觸發兩次
VerticalSeekbar.java
public boolean onTouchEvent(MotionEvent event) {
if (!isEnabled()) {
return false;
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_MOVE:
super.onTouchEvent(event);
int progress = getMax() - (int) (getMax() * event.getY()/getHeight());
// Ensure progress stays within boundaries
if(progress < 0) {progress = 0;}
if(progress > getMax()) {
progress = getMax();}
setProgress(progress); // Draw progress
if(progress != lastProgress) {
// Only enact listener if the progress has actually changed
lastProgress = progress;
Information.onSeekBarChangeListener.onProgressChanged(this, progress, true);
}
onSizeChanged(getWidth(), getHeight() , 0, 0);
Log.i("radio", "action move");
setPressed(true);
setSelected(true);
case MotionEvent.ACTION_UP:
Log.i("radio", "action up"); //printed twice
Information.onSeekBarChangeListener.onStopTrackingTouch(this);
break;
case MotionEvent.ACTION_CANCEL:
break;
}
return true;
}
Information.java
onSeekBarChangeListener = new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser){
radio = (progress/(double) 10);
tv_radio.setText(radio + " Km");
}
@Override
public void onStartTrackingTouch(SeekBar seekBar){
Log.i("vertical", "onStart");
}
@Override
public void onStopTrackingTouch(SeekBar seekBar){
Log.i("vertical", "onStopTracking"); //printed twice
getRequest request = new getRequest();
request.execute("http://...");
}
};
sb_radio.setOnSeekBarChangeListener(onSeekBarChangeListener);
任何想法,爲什麼兩次檢測MotionEvent.ACTION_UP
?即使我只是簡單地點擊Seekbar
而不拖動。