Add basic steps for Android gestures (1)

First, write a class that inherits Simpleongesturelistener, and rewrite the corresponding function as needed. Here is the function of the corresponding function

1, press (Ondown): Just finger touch to the screen of the moment, is the touch of that moment.

2, throw (onfling): Finger on the touch screen to move sequentially, and loosen the action.

3, Long Press (onlongpress): The finger on the touch screen for a period of time, and did not loosen.

4. Scroll (onscroll): Swipe your finger on the touchscreen.

5, Hold (onshowpress): Finger on the touch screen, his time range in the press, before the long press.

6, lift Up (onsingletapup): The finger left the touch screen of that instant.

Note: Any gesture action will first perform a pressed action

Press and hold action before long press

Hold action and press action to perform a lift

No lifting action after long press, scrolling, and throwing

Second, define a Gesturedetector variable in the activity where you want to add the gesture, and when you add a listener to the variable, initialize the variable,

Gesturedetector = Newgesturedetector (listener).

Thirdly, the dispatchtouchevent function of the function activity must be overloaded in the activity.