android.view.MotionEvent.getPointerCount()方法的使用及代码示例

x33g5p2x  于2022-01-24 转载在 其他  
字(8.9k)|赞(0)|评价(0)|浏览(532)

本文整理了Java中android.view.MotionEvent.getPointerCount()方法的一些代码示例，展示了MotionEvent.getPointerCount()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。MotionEvent.getPointerCount()方法的具体详情如下：
包路径：android.view.MotionEvent
类名称：MotionEvent
方法名：getPointerCount

MotionEvent.getPointerCount介绍

暂无

代码示例

代码示例来源：origin: TonicArtos/StickyGridHeaders

private static int[] getPointerIds(MotionEvent e) {
  int n = e.getPointerCount();
  int[] r = new int[n];
  for (int i = 0; i < n; i++) {
    r[i] = e.getPointerId(i);
  }
  return r;
}

代码示例来源：origin: stackoverflow.com

import android.view.MotionEvent;

public class EclairMotionEvent extends WrapMotionEvent {

  protected EclairMotionEvent(MotionEvent event) {
      super(event);
  }

  public float getX(int pointerIndex) {
      return event.getX(pointerIndex);
  }

  public float getY(int pointerIndex) {
      return event.getY(pointerIndex);
  }

  public int getPointerCount() {
      return event.getPointerCount();
  }

  public int getPointerId(int pointerIndex) {
      return event.getPointerId(pointerIndex);
  }
}

代码示例来源：origin: robolectric/robolectric

public void set(MotionEvent event) {
 pointerCount = event.getPointerCount();
 pointerIds = new int[pointerCount];
 x.clear();
 y.clear();
 for (int i = 0; i < pointerCount; i++) {
  pointerIds[i] = event.getPointerId(i);
  x.put(pointerIds[i], event.getX(i));
  y.put(pointerIds[i], event.getY(i));
 }
 activePointerId = event.getPointerId(0);
 eventTime = event.getEventTime();
}

代码示例来源：origin: chrisbanes/PhotoView

@Override
  public boolean onFling(MotionEvent e1, MotionEvent e2,
    float velocityX, float velocityY) {
    if (mSingleFlingListener != null) {
      if (getScale() > DEFAULT_MIN_SCALE) {
        return false;
      }
      if (e1.getPointerCount() > SINGLE_TOUCH
        || e2.getPointerCount() > SINGLE_TOUCH) {
        return false;
      }
      return mSingleFlingListener.onFling(e1, e2, velocityX, velocityY);
    }
    return false;
  }
});

代码示例来源：origin: novoda/android-demos

public void setMultitouchPoints(MotionEvent event) {
  touchPoints.clear();
  int pointerIndex = 0;
  for (int index = 0; index < event.getPointerCount(); ++index) {
    pointerIndex = event.getPointerId(index);
    touchPoints.add(new PointF(event.getX(pointerIndex), event.getY(pointerIndex)));
  }
}

代码示例来源：origin: novoda/android-demos

public void setInitalPositionMultiPoints(MotionEvent event) {
  touchPoints.clear();
  int pointerIndex = 0;
  for (int index = 0; index < event.getPointerCount(); ++index) {
    pointerIndex = event.getPointerId(index);
    touchPoints.add(new PointF(event.getX(pointerIndex), event.getY(pointerIndex)));
  }
  double r = Math.atan2(touchPoints.get(1).x - touchPoints.get(1 - 1).x,
      touchPoints.get(1).y - touchPoints.get(1 - 1).y);
  old_degrees = -(int) Math.toDegrees(r);
}

代码示例来源：origin: TeamNewPipe/NewPipe

private boolean handleMultiDrag(final MotionEvent event) {
  if (event.getPointerCount() != 2) return false;
  final float firstPointerX = event.getX(0);
  final float secondPointerX = event.getX(1);
  final float diff = Math.abs(firstPointerX - secondPointerX);
  if (firstPointerX > secondPointerX) {
    // second pointer is the anchor (the leftmost pointer)
    popupLayoutParams.x = (int) (event.getRawX() - diff);
  } else {
    // first pointer is the anchor
    popupLayoutParams.x = (int) event.getRawX();
  }
  checkPopupPositionBounds();
  updateScreenSize();
  final int width = (int) Math.min(screenWidth, diff);
  updatePopupSize(width, -1);
  return true;
}

代码示例来源：origin: alexvasilkov/GestureViews

private void handleTouch(MotionEvent event) {
  switch (event.getActionMasked()) {
    case MotionEvent.ACTION_POINTER_DOWN:
      if (event.getPointerCount() == 2) { // on first non-primary pointer
        // Skipping ViewPager fake dragging if we're not started dragging yet
        // to allow scale/rotation gestures
        isSkipViewPager = !hasViewPagerX();
      }
      break;
    default:
  }
}

代码示例来源：origin: sephiroth74/ImageViewZoom

@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
  if (!mScrollEnabled) {
    return false;
  }
  if (e1 == null || e2 == null) {
    return false;
  }
  if (e1.getPointerCount() > 1 || e2.getPointerCount() > 1) {
    return false;
  }
  if (mScaleDetector.isInProgress()) {
    return false;
  }
  return ImageViewTouch.this.onScroll(e1, e2, distanceX, distanceY);
}

代码示例来源：origin: steelkiwi/cropiwa

private void onPointerUp(MotionEvent e) {
  //If user lifted finger that we used to calculate translation, we need to find a new one
  if (e.getPointerId(e.getActionIndex()) == id) {
    int index = 0;
    while (index < e.getPointerCount() && index == e.getActionIndex()) {
      index++;
    }
    onDown(e.getX(index), e.getY(index), e.getPointerId(index));
  }
}

代码示例来源：origin: TonicArtos/StickyGridHeaders

private static MotionEvent.PointerCoords[] getPointerCoords(MotionEvent e) {
  int n = e.getPointerCount();
  MotionEvent.PointerCoords[] r = new MotionEvent.PointerCoords[n];
  for (int i = 0; i < n; i++) {
    r[i] = new MotionEvent.PointerCoords();
    e.getPointerCoords(i, r[i]);
  }
  return r;
}

代码示例来源：origin: lyft/scissors

@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
  if (e2.getPointerCount() != 1) {
    return true;
  }
  TouchPoint delta = new TouchPoint(-distanceX, -distanceY);
  position.add(delta);
  ensureInsideViewport();
  return true;
}

代码示例来源：origin: Yalantis/uCrop

/**
 * If it's ACTION_DOWN event - user touches the screen and all current animation must be canceled.
 * If it's ACTION_UP event - user removed all fingers from the screen and current image position must be corrected.
 * If there are more than 2 fingers - update focal point coordinates.
 * Pass the event to the gesture detectors if those are enabled.
 */
@Override
public boolean onTouchEvent(MotionEvent event) {
  if ((event.getAction() & MotionEvent.ACTION_MASK) == MotionEvent.ACTION_DOWN) {
    cancelAllAnimations();
  }
  if (event.getPointerCount() > 1) {
    mMidPntX = (event.getX(0) + event.getX(1)) / 2;
    mMidPntY = (event.getY(0) + event.getY(1)) / 2;
  }
  mGestureDetector.onTouchEvent(event);
  if (mIsScaleEnabled) {
    mScaleDetector.onTouchEvent(event);
  }
  if (mIsRotateEnabled) {
    mRotateDetector.onTouchEvent(event);
  }
  if ((event.getAction() & MotionEvent.ACTION_MASK) == MotionEvent.ACTION_UP) {
    setImageToWrapCropBounds();
  }
  return true;
}

代码示例来源：origin: PhilJay/MPAndroidChart

public static void velocityTrackerPointerUpCleanUpIfNecessary(MotionEvent ev,
                               VelocityTracker tracker) {
  // Check the dot product of current velocities.
  // If the pointer that left was opposing another velocity vector, clear.
  tracker.computeCurrentVelocity(1000, mMaximumFlingVelocity);
  final int upIndex = ev.getActionIndex();
  final int id1 = ev.getPointerId(upIndex);
  final float x1 = tracker.getXVelocity(id1);
  final float y1 = tracker.getYVelocity(id1);
  for (int i = 0, count = ev.getPointerCount(); i < count; i++) {
    if (i == upIndex)
      continue;
    final int id2 = ev.getPointerId(i);
    final float x = x1 * tracker.getXVelocity(id2);
    final float y = y1 * tracker.getYVelocity(id2);
    final float dot = x + y;
    if (dot < 0) {
      tracker.clear();
      break;
    }
  }
}

代码示例来源：origin: vondear/RxTool

@Override
public boolean onTouchEvent(MotionEvent event) {
  if (event.getPointerCount() == 1) {
    if (camera != null) {
      /*camera.startPreview();
      handleFocusMetering(event, camera);*/
    }
  } else {
    switch (event.getAction() & MotionEvent.ACTION_MASK) {
      case MotionEvent.ACTION_POINTER_DOWN:
        oldDist = getFingerSpacing(event);
        break;
      case MotionEvent.ACTION_MOVE:
        float newDist = getFingerSpacing(event);
        if (newDist > oldDist) {
          Log.e("Camera", "进入放大手势");
          handleZoom(true, camera);
        } else if (newDist < oldDist) {
          Log.e("Camera", "进入缩小手势");
          handleZoom(false, camera);
        }
        oldDist = newDist;
        break;
      default:
        break;
    }
  }
  return true;
}

代码示例来源：origin: Hitomis/transferee

@Override
public boolean dispatchTouchEvent(MotionEvent event) {
  if (isEnable) {
    final int Action = event.getActionMasked();
    if (event.getPointerCount() >= 2) hasMultiTouch = true;
    mDetector.onTouchEvent(event);
    mRotateDetector.onTouchEvent(event);
    mScaleDetector.onTouchEvent(event);
    if (Action == MotionEvent.ACTION_UP || Action == MotionEvent.ACTION_CANCEL) onUp();
    return true;
  } else {
    return super.dispatchTouchEvent(event);
  }
}

代码示例来源：origin: ankidroid/Anki-Android

private boolean handleMultiTouchEvent(MotionEvent event) {
  if (event.getPointerCount() == 2) {
    switch (event.getActionMasked()) {
      case MotionEvent.ACTION_POINTER_DOWN:
        reinitializeSecondFinger(event);
        return true;
      case MotionEvent.ACTION_MOVE:
        return trySecondFingerScroll(event);
      case MotionEvent.ACTION_POINTER_UP:
        return trySecondFingerClick(event);
      default:
        return false;
    }
  }
  return false;
}

代码示例来源：origin: bm-x/PhotoView

@Override
public boolean dispatchTouchEvent(MotionEvent event) {
  if (isEnable) {
    final int Action = event.getActionMasked();
    if (event.getPointerCount() >= 2) hasMultiTouch = true;
    mDetector.onTouchEvent(event);
    if (isRotateEnable) {
      mRotateDetector.onTouchEvent(event);
    }
    mScaleDetector.onTouchEvent(event);
    if (Action == MotionEvent.ACTION_UP || Action == MotionEvent.ACTION_CANCEL) onUp();
    return true;
  } else {
    return super.dispatchTouchEvent(event);
  }
}

代码示例来源：origin: lyft/scissors

@OnTouch(R.id.crop_view)
public boolean onTouchCropView(MotionEvent event) { // GitHub issue #4
  if (event.getPointerCount() > 1 || cropView.getImageBitmap() == null) {
    return true;
  }
  switch (event.getActionMasked()) {
    case MotionEvent.ACTION_DOWN:
    case MotionEvent.ACTION_MOVE:
      ButterKnife.apply(buttons, VISIBILITY, View.INVISIBLE);
      break;
    default:
      ButterKnife.apply(buttons, VISIBILITY, View.VISIBLE);
      break;
  }
  return true;
}

代码示例来源：origin: robolectric/robolectric

@Test
public void addingSecondPointerSetsCount() {
 assertThat(event.getX(0)).isEqualTo(5.0f);
 assertThat(event.getY(0)).isEqualTo(10.0f);
 assertThat(event.getPointerCount()).isEqualTo(1);
 shadowMotionEvent.setPointer2(20.0f, 30.0f);
 assertThat(event.getX(1)).isEqualTo(20.0f);
 assertThat(event.getY(1)).isEqualTo(30.0f);
 assertThat(event.getPointerCount()).isEqualTo(2);
}

内容来源于网络，如有侵权，请联系作者删除！

MotionEvent

相关文章

    查看更多

    热门标签

    更多
    JavaquerypythonNode开发语言requestUtil数据库Table后端算法LoggerMessageElementParser

    最新文章

    更多

    MotionEvent类方法

    • 蜀ICP备13028337号-1 大数据知识库 https://www.saoniuhuo.com © All rights reserved
    • 本站内容来源互联网,如果侵犯您的权益请联系我们删除, 联系方式：448109455@qq.com