android中的2个手指滑动
我尝试使用android中的2个手指滑动,android,onfling,Android,Onfling,我尝试使用SimpleNogestureListener的onFling方法实现两个手指滑动。但是,我发现,SimpleNogestureListener不支持双指触摸 如何计算呢?您可以尝试将OnTouchListener与MotionEvent.ACTION\u POINTER\u DOWN一起使用,如下所示: button.setOnTouchListener(new View.OnTouchListener() { public boolean onTouch(View
SimpleNogestureListener
的onFling
方法实现两个手指滑动。但是,我发现,SimpleNogestureListener
不支持双指触摸
如何计算呢?您可以尝试将OnTouchListener与
MotionEvent.ACTION\u POINTER\u DOWN
一起使用,如下所示:
button.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View view, MotionEvent motionEvent) {
int action = motionEvent.getAction();
switch(action & MotionEvent.ACTION_MASK)
{
case MotionEvent.ACTION_POINTER_DOWN:
Toast.makeText(MyActivity.this, " Two Fingers Tapped Once. Yeeeyy :)", 0).show();
// set the mTwoFingersTapped flag to TRUE when we tap with 2 fingers at once
mTwoFingersTapped = true;
break;
}
return false;
}
});
是一个教程,它解释了如何做。我的解决方案是可行的,但是使用公共静态int来计算有多少个手指是非常难看的。在我用两个手指投掷后,我不得不将fingercount设置回1,因为我再也不能用一个手指来放下动作指针了。。。我不知道为什么。。。但是这个解决方案也适用于更多的手指。。。希望有人能在功能中使用它
public class RemoteFragment extends Fragment{
public static int fingercount = 1;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final GestureDetector gdt = new GestureDetector(getActivity(),
new RemoteGestureListener());
View view = inflater.inflate(R.layout.gestures, container, false);
view.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(final View view, final MotionEvent event) {
int action = event.getAction();
switch (action & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_POINTER_DOWN:
Log.d(TAG,
"Pointer-Count ="
+ String.valueOf(fingerCount = event
.getPointerCount()));
break;
}
gdt.onTouchEvent(event);
return true;
}
});
return view;
}
}
public class RemoteGestureListener implements OnGestureListenerr {
private final static String TAG = "RemoteGestureListener";
private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_THRESHOLD_VELOCITY = 200;
public RemoteGestureListener() {
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
Log.d(TAG, "onFling");
if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
if (RemoteFragment.fingerCount == 1) {
Log.d(TAG, "Left Swipe");
} else {
Log.d(TAG, "Left xFinger Swipe");
RemoteFragment.fingerCount = 1;
}
return true; // Right to left
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
if (RemoteFragment.fingerCount == 1) {
Log.d(TAG, "Right Swipe");
} else {
Log.d(TAG, "Right xFinger Swipe");
RemoteFragment.fingerCount = 1;
}
return true; // Left to right
}
if (e1.getY() - e2.getY() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY) {
if (RemoteFragment.fingerCount == 1) {
Log.d(TAG, "Top Swipe");
} else {
Log.d(TAG, "Top xFinger Swipe");
RemoteFragment.fingerCount = 1;
}
return true; // Bottom to top
} else if (e2.getY() - e1.getY() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY) {
if (RemoteFragment.fingerCount == 1) {
Log.d(TAG, "Bottom Swipe");
} else {
Log.d(TAG, "Bottom xFinger Swipe");
RemoteFragment.fingerCount = 1;
}
return true;
}
return true;
}
我在不久前做了一个改进,使得实现1/多指滑动非常容易
您可以找到API的更详细文档
可以找到一个示例实现
你想看的部分是
ImageView mv = (ImageView) findViewById(R.id.myview);
final TextView grtv = (TextView) findViewById(R.id.gestureResultTextView);
SimpleFingerGestures.DEBUG = true;
SimpleFingerGestures.CONSUME_TOUCH_EVENTS = true;
SimpleFingerGestures sfg = new SimpleFingerGestures();
sfg.setOnFingerGestureListener(new SimpleFingerGestures.OnFingerGestureListener() {
@Override
public boolean onSwipeUp(int fingers, long gestureDuration) {
grtv.setText("swiped " + fingers + " up");
return false;
}
@Override
public boolean onSwipeDown(int fingers, long gestureDuration) {
grtv.setText("swiped " + fingers + " down");
return false;
}
@Override
public boolean onSwipeLeft(int fingers, long gestureDuration) {
grtv.setText("swiped " + fingers + " left");
return false;
}
@Override
public boolean onSwipeRight(int fingers, long gestureDuration) {
grtv.setText("swiped " + fingers + " right");
return false;
}
@Override
public boolean onPinch(int fingers, long gestureDuration) {
grtv.setText("pinch");
return false;
}
@Override
public boolean onUnpinch(int fingers, long gestureDuration) {
grtv.setText("unpinch");
return false;
}
});
mv.setOnTouchListener(sfg);
嘿,谢谢。你能告诉我如何用这个实现刷卡吗!不幸的是,我对刷卡知之甚少。也许有人能帮忙。对不起:(你有这个问题的解决方案,如果有,你能在这里提供代码吗?