我正在嘗試在我的應用中實施滑動手勢。我已經制作了幾乎所有的代碼,但它不起作用。Android - 使用滑動手勢的問題
這裏是我在我的活動代碼:
// Swipe detector
gestureDetector = new GestureDetector(new SwipeGesture(this));
gestureListener = new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event)
{
Log.e("", "It works");
return gestureDetector.onTouchEvent(event);
}
};
LinearLayout root = (LinearLayout) findViewById(R.id.rules_root);
root.setOnTouchListener(gestureListener);
當我觸摸屏幕時,logcat的顯示it works
。
他在這裏我的類SwipeGesture
的代碼:
public class SwipeGesture extends SimpleOnGestureListener
{
private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 250;
private static final int SWIPE_THRESHOLD_VELOCITY = 200;
private Activity activity;
public SwipeGesture(Activity activity)
{
super();
this.activity = activity;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
{
Log.e("", "Here I am");
try
{
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH) return false;
if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY)
{
if (((TabActivity) activity.getParent()).getTabHost() != null)
{
TabHost th = ((TabActivity) activity.getParent()).getTabHost();
th.setCurrentTab(th.getCurrentTab() - 1);
}
else
{
activity.finish();
}
Log.e("", "Swipe left");
}
else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY)
{
if (((TabActivity) activity.getParent()).getTabHost() != null)
{
TabHost th = ((TabActivity) activity.getParent()).getTabHost();
th.setCurrentTab(th.getCurrentTab() + 1);
}
Log.e("", "Swipe right");
}
}
catch (Exception e)
{
e.printStackTrace();
}
return false;
}
}
線Log.e("", "Here I am");
永遠不會顯示。所以我認爲onFling方法永遠不會被調用。
任何想法,爲什麼這不起作用?
謝謝。
問候。
V.
謝謝,這個作品! – Manitoba 2012-04-04 09:43:30
哦,男人,我差不多兩個小時都遇到同樣的問題,+1謝謝你的客觀性 – 2013-05-01 13:45:42