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滾動創建OnSwipeTouchListener類:Android的刷卡左/右pagging和上/下的web視圖
public class OnSwipeTouchListener implements OnTouchListener {
private GestureDetector gestureDetector;
public OnSwipeTouchListener(Context c) {
gestureDetector = new GestureDetector(c, new GestureListener());
}
public boolean onTouch(final View view, final MotionEvent motionEvent) {
return gestureDetector.onTouchEvent(motionEvent);
}
private final class GestureListener extends SimpleOnGestureListener {
private static final int SWIPE_THRESHOLD = 100;
private static final int SWIPE_VELOCITY_THRESHOLD = 100;
@Override
public boolean onDown(MotionEvent e) {
return true;
}
// Determines the fling velocity and then fires the appropriate swipe event accordingly
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
boolean result = false;
try {
float diffY = e2.getY() - e1.getY();
float diffX = e2.getX() - e1.getX();
if (Math.abs(diffX) > Math.abs(diffY)) {
if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
if (diffX > 0) {
onSwipeRight();
} else {
onSwipeLeft();
}
}
} else {
if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
if (diffY > 0) {
onSwipeDown();
} else {
onSwipeUp();
}
}
}
} catch (Exception exception) {
exception.printStackTrace();
}
return result;
}
}
public void onSwipeRight() {
}
public void onSwipeLeft() {
}
public void onSwipeUp() {
}
public void onSwipeDown() {
}
}
而在ItemActivity我有一個web視圖(mWebView)並投入從資產HTML文件。從那以後,我穿上它的觸摸監聽器:
mWebView.setOnTouchListener(new OnSwipeTouchListener(this) {
@Override
public void onSwipeDown() {
}
@Override
public void onSwipeUp() {
}
我實現onSwipeLeft和onSwipeUp正確,加載其他HTML-S卻不在所選HTML工作刷卡向上和向下滑動,以向上和向下滾動,所以我有問題顯示完整的HTML。
如何實現SwipeDown和SwipeUp垂直滾動工作?