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

x33g5p2x  于2022-01-24 转载在 其他  
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本文整理了Java中android.view.MotionEvent.findPointerIndex()方法的一些代码示例，展示了MotionEvent.findPointerIndex()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.findPointerIndex()方法的具体详情如下：
包路径：android.view.MotionEvent
类名称：MotionEvent
方法名：findPointerIndex

MotionEvent.findPointerIndex介绍

暂无

代码示例

代码示例来源：origin: ankidroid/Anki-Android

private void reinitializeSecondFinger(MotionEvent event) {
  mSecondFingerWithinTapTolerance = true;
  mSecondFingerPointerId = event.getPointerId(event.getActionIndex());
  mSecondFingerX0 = event.getX(event.findPointerIndex(mSecondFingerPointerId));
  mSecondFingerY0 = event.getY(event.findPointerIndex(mSecondFingerPointerId));
}

代码示例来源：origin: ankidroid/Anki-Android

private boolean updateSecondFinger(MotionEvent event) {
  int pointerIndex = event.findPointerIndex(mSecondFingerPointerId);
  if (pointerIndex > -1) {
    mSecondFingerX = event.getX(pointerIndex);
    mSecondFingerY = event.getY(pointerIndex);
    float dx = Math.abs(mSecondFingerX0 - mSecondFingerX);
    float dy = Math.abs(mSecondFingerY0 - mSecondFingerY);
    if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
      mSecondFingerWithinTapTolerance = false;
    }
    return true;
  }
  return false;
}

代码示例来源：origin: novoda/android-demos

public void updatePositionToMoveTheImage(MotionEvent event) {
  final int pointerIndex = event.findPointerIndex(mActivePointerId);
  final float x = event.getX(pointerIndex);
  final float y = event.getY(pointerIndex);
  if (!mScaleDetector.isInProgress()) {
    final float dx = x - mLastTouchX;
    final float dy = y - mLastTouchY;
    mPosX += dx;
    mPosY += dy;
    invalidate();
  }
  mLastTouchX = x;
  mLastTouchY = y;
}

代码示例来源：origin: jiangqqlmj/FastDev4Android

@Override
  public boolean onTouchEvent(MotionEvent ev) {
    final int action = ev.getAction();
    switch (action & MotionEvent.ACTION_MASK) {
      case MotionEvent.ACTION_DOWN:
        mActivePointerId = ev.getPointerId(0);
        break;
      case MotionEvent.ACTION_CANCEL:
      case MotionEvent.ACTION_UP:
        mActivePointerId = INVALID_POINTER_ID;
        break;
      case MotionEvent.ACTION_POINTER_UP:
        final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
        final int pointerId = ev.getPointerId(pointerIndex);
        if (pointerId == mActivePointerId) {
          // This was our active pointer going up. Choose a new
          // active pointer and adjust accordingly.
          final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
          mActivePointerId = ev.getPointerId(newPointerIndex);
          mLastTouchX = ev.getX(newPointerIndex);
          mLastTouchY = ev.getY(newPointerIndex);
        }
        break;
    }
    mActivePointerIndex = ev.findPointerIndex(mActivePointerId != INVALID_POINTER_ID ? mActivePointerId : 0);
    return super.onTouchEvent(ev);
  }
}

代码示例来源：origin: wangdan/AisenWeiBo

@Override
  public boolean onTouchEvent(MotionEvent ev) {
    final int action = ev.getAction();
    switch (action & MotionEvent.ACTION_MASK) {
      case MotionEvent.ACTION_DOWN:
        mActivePointerId = ev.getPointerId(0);
        break;
      case MotionEvent.ACTION_CANCEL:
      case MotionEvent.ACTION_UP:
        mActivePointerId = INVALID_POINTER_ID;
        break;
      case MotionEvent.ACTION_POINTER_UP:
        final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
        final int pointerId = ev.getPointerId(pointerIndex);
        if (pointerId == mActivePointerId) {
          // This was our active pointer going up. Choose a new
          // active pointer and adjust accordingly.
          final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
          mActivePointerId = ev.getPointerId(newPointerIndex);
          mLastTouchX = ev.getX(newPointerIndex);
          mLastTouchY = ev.getY(newPointerIndex);
        }
        break;
    }
    mActivePointerIndex = ev.findPointerIndex(mActivePointerId != INVALID_POINTER_ID ? mActivePointerId : 0);
    return super.onTouchEvent(ev);
  }
}

代码示例来源：origin: stackoverflow.com

case MotionEvent.ACTION_POINTER_DOWN:
  ptrID2 = event.getPointerId(event.getActionIndex());
  sX = event.getX(event.findPointerIndex(ptrID1));
  sY = event.getY(event.findPointerIndex(ptrID1));
  fX = event.getX(event.findPointerIndex(ptrID2));
  fY = event.getY(event.findPointerIndex(ptrID2));
  break;
case MotionEvent.ACTION_MOVE:
  if(ptrID1 != INVALID_POINTER_ID && ptrID2 != INVALID_POINTER_ID){
    float nfX, nfY, nsX, nsY;
    nsX = event.getX(event.findPointerIndex(ptrID1));
    nsY = event.getY(event.findPointerIndex(ptrID1));
    nfX = event.getX(event.findPointerIndex(ptrID2));
    nfY = event.getY(event.findPointerIndex(ptrID2));

代码示例来源：origin: Yalantis/uCrop

sX = event.getX();
sY = event.getY();
mPointerIndex1 = event.findPointerIndex(event.getPointerId(0));
mAngle = 0;
mIsFirstTouch = true;
fX = event.getX();
fY = event.getY();
mPointerIndex2 = event.findPointerIndex(event.getPointerId(event.getActionIndex()));
mAngle = 0;
mIsFirstTouch = true;

代码示例来源：origin: liaoinstan/SpringView

final int pointerIndex = ev.findPointerIndex(mActivePointerId);
final float x = ev.getX(pointerIndex);
final float y = ev.getY(pointerIndex);

代码示例来源：origin: steelkiwi/cropiwa

public void onTouchEvent(MotionEvent e, boolean canHandle) {
  switch (e.getActionMasked()) {
    case MotionEvent.ACTION_POINTER_UP:
      onPointerUp(e);
      return;
    case MotionEvent.ACTION_MOVE:
      break;
    default:
      return;
  }
  int index = e.findPointerIndex(id);
  updateImageBounds();
  float currentX = interpolator.interpolateX(e.getX(index));
  float currentY = interpolator.interpolateY(e.getY(index));
  if (canHandle) {
    translateImage(currentX - prevX, currentY - prevY);
  }
  saveCoordinates(currentX, currentY);
}

代码示例来源：origin: chrisbanes/PhotoView

.findPointerIndex(mActivePointerId != INVALID_POINTER_ID ? mActivePointerId
        : 0);
return true;

代码示例来源：origin: ZieIony/Carbon

private ViewHolder findSwipedView(MotionEvent motionEvent) {
  final RecyclerView.LayoutManager lm = mRecyclerView.getLayoutManager();
  if (mActivePointerId == ACTIVE_POINTER_ID_NONE) {
    return null;
  }
  final int pointerIndex = motionEvent.findPointerIndex(mActivePointerId);
  final float dx = motionEvent.getX(pointerIndex) - mInitialTouchX;
  final float dy = motionEvent.getY(pointerIndex) - mInitialTouchY;
  final float absDx = Math.abs(dx);
  final float absDy = Math.abs(dy);
  if (absDx < mSlop && absDy < mSlop) {
    return null;
  }
  if (absDx > absDy && lm.canScrollHorizontally()) {
    return null;
  } else if (absDy > absDx && lm.canScrollVertically()) {
    return null;
  }
  View child = findChildView(motionEvent);
  if (child == null) {
    return null;
  }
  return mRecyclerView.getChildViewHolder(child);
}

代码示例来源：origin: rey5137/material

break;
case MotionEvent.ACTION_MOVE:
  final int activePointerIndex = srcEvent.findPointerIndex(mActivePointerId);
  if (activePointerIndex >= 0) {
    final float x = srcEvent.getX(activePointerIndex);

代码示例来源：origin: robolectric/robolectric

@Test
 public void canFindPointerIndexFromId() {
  shadowMotionEvent.setPointer2(20.0f, 30.0f);
  shadowMotionEvent.setPointerIds(2, 1);
  assertEquals(0, event.findPointerIndex(2));
  assertEquals(1, event.findPointerIndex(1));
  assertEquals(-1, event.findPointerIndex(3));
 }
}

代码示例来源：origin: chentao0707/SimplifyReader

switch (mTouchMode) {
  case TOUCH_MODE_DOWN:
    final int pointerIndex = ev.findPointerIndex(mActivePointerId);
    final int y = (int) ev.getY(pointerIndex);
    if (startScrollIfNeeded(y - mMotionY)) {

代码示例来源：origin: ZieIony/Carbon

final int index = e.findPointerIndex(mActivePointerId);
final float x = e.getX(index);
final float y = e.getY(index);

代码示例来源：origin: ZieIony/Carbon

final int index = event.findPointerIndex(mActivePointerId);
if (DEBUG) {
  Log.d(TAG, "pointer index " + index);

代码示例来源：origin: jdsjlzx/LRecyclerView

break;
case MotionEvent.ACTION_MOVE:
  int pointerIndex = ev.findPointerIndex(mActivePointerId);
  if (pointerIndex == -1) {
    pointerIndex = 0;

代码示例来源：origin: ZieIony/Carbon

final int activePointerIndex = event.findPointerIndex(mActivePointerId);
if (activePointerIndex >= 0) {
  checkSelectForSwipe(action, event, activePointerIndex);

代码示例来源：origin: janishar/PlaceHolderView

if(!resetDone && event.findPointerIndex(activePointerId) != SwipeDecor.PRIMITIVE_NULL) {
  y = event.getRawY();
  FrameLayout.LayoutParams layoutParamsTemp = (FrameLayout.LayoutParams) v.getLayoutParams();

代码示例来源：origin: rey5137/material

final int activeIndex = event.findPointerIndex(activePointerId);
if (activeIndex < 0) {
  handledEvent = false;

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