android.view.View#OVER_SCROLL_ALWAYS源码实例Demo

下面列出了android.view.View#OVER_SCROLL_ALWAYS 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。

源代码1 项目： react-native-GPay 文件： ReactScrollViewHelper.java

public static int parseOverScrollMode(String jsOverScrollMode) {
  if (jsOverScrollMode == null || jsOverScrollMode.equals(AUTO)) {
    return View.OVER_SCROLL_IF_CONTENT_SCROLLS;
  } else if (jsOverScrollMode.equals(OVER_SCROLL_ALWAYS)) {
    return View.OVER_SCROLL_ALWAYS;
  } else if (jsOverScrollMode.equals(OVER_SCROLL_NEVER)) {
    return View.OVER_SCROLL_NEVER;
  } else {
    throw new JSApplicationIllegalArgumentException("wrong overScrollMode: " + jsOverScrollMode);
  }
}

源代码2 项目： AndroidAnimationExercise 文件： NestedScrollView.java

@Override
public void computeScroll() {
    if (mScroller.computeScrollOffset()) {
        int oldX = getScrollX();
        int oldY = getScrollY();
        int x = mScroller.getCurrX();
        int y = mScroller.getCurrY();
        if (oldX != x || oldY != y) {
            final int range = getScrollRange();
            final int overscrollMode = getOverScrollMode();
            final boolean canOverscroll = overscrollMode == View.OVER_SCROLL_ALWAYS
                    || (overscrollMode == View.OVER_SCROLL_IF_CONTENT_SCROLLS && range > 0);

            overScrollByCompat(x - oldX, y - oldY, oldX, oldY, 0, range,
                    0, 0, false);

            if (canOverscroll) {
                ensureGlows();
                if (y <= 0 && oldY > 0) {
                    mEdgeGlowTop.onAbsorb((int) mScroller.getCurrVelocity());
                } else if (y >= range && oldY < range ) {
                    mEdgeGlowBottom.onAbsorb((int) mScroller.getCurrVelocity());
                }
            }
        } else if (!isFling){
            //回弹过程中有可能会相同,也需要刷新
            //Log.i("you", "postInvalidate...");
            postInvalidate();
        }
    }
}

源代码3 项目： android-chromium 文件： OverScrollGlow.java

/**
 * Pull leftover touch scroll distance into one of the edge glows as appropriate.
 *
 * @param x Current X scroll offset
 * @param y Current Y scroll offset
 * @param oldX Old X scroll offset
 * @param oldY Old Y scroll offset
 * @param maxX Maximum range for horizontal scrolling
 * @param maxY Maximum range for vertical scrolling
 */
public void pullGlow(int x, int y, int oldX, int oldY, int maxX, int maxY) {
    // Only show overscroll bars if there was no movement in any direction
    // as a result of scrolling.
    if (oldX == mHostView.getScrollX() && oldY == mHostView.getScrollY()) {
        // Don't show left/right glows if we fit the whole content.
        // Also don't show if there was vertical movement.
        if (maxX > 0) {
            final int pulledToX = oldX + mOverScrollDeltaX;
            if (pulledToX < 0) {
                mEdgeGlowLeft.onPull((float) mOverScrollDeltaX / mHostView.getWidth());
                if (!mEdgeGlowRight.isFinished()) {
                    mEdgeGlowRight.onRelease();
                }
            } else if (pulledToX > maxX) {
                mEdgeGlowRight.onPull((float) mOverScrollDeltaX / mHostView.getWidth());
                if (!mEdgeGlowLeft.isFinished()) {
                    mEdgeGlowLeft.onRelease();
                }
            }
            mOverScrollDeltaX = 0;
        }

        if (maxY > 0 || mHostView.getOverScrollMode() == View.OVER_SCROLL_ALWAYS) {
            final int pulledToY = oldY + mOverScrollDeltaY;
            if (pulledToY < 0) {
                mEdgeGlowTop.onPull((float) mOverScrollDeltaY / mHostView.getHeight());
                if (!mEdgeGlowBottom.isFinished()) {
                    mEdgeGlowBottom.onRelease();
                }
            } else if (pulledToY > maxY) {
                mEdgeGlowBottom.onPull((float) mOverScrollDeltaY / mHostView.getHeight());
                if (!mEdgeGlowTop.isFinished()) {
                    mEdgeGlowTop.onRelease();
                }
            }
            mOverScrollDeltaY = 0;
        }
    }
}

源代码4 项目： android-chromium 文件： OverScrollGlow.java

/**
 * Absorb leftover fling velocity into one of the edge glows as appropriate.
 *
 * @param x Current X scroll offset
 * @param y Current Y scroll offset
 * @param oldX Old X scroll offset
 * @param oldY Old Y scroll offset
 * @param rangeX Maximum range for horizontal scrolling
 * @param rangeY Maximum range for vertical scrolling
 * @param currentFlingVelocity Current fling velocity
 */
public void absorbGlow(int x, int y, int oldX, int oldY, int rangeX, int rangeY,
        float currentFlingVelocity) {
    if (rangeY > 0 || mHostView.getOverScrollMode() == View.OVER_SCROLL_ALWAYS) {
        if (y < 0 && oldY >= 0) {
            mEdgeGlowTop.onAbsorb((int) currentFlingVelocity);
            if (!mEdgeGlowBottom.isFinished()) {
                mEdgeGlowBottom.onRelease();
            }
        } else if (y > rangeY && oldY <= rangeY) {
            mEdgeGlowBottom.onAbsorb((int) currentFlingVelocity);
            if (!mEdgeGlowTop.isFinished()) {
                mEdgeGlowTop.onRelease();
            }
        }
    }

    if (rangeX > 0) {
        if (x < 0 && oldX >= 0) {
            mEdgeGlowLeft.onAbsorb((int) currentFlingVelocity);
            if (!mEdgeGlowRight.isFinished()) {
                mEdgeGlowRight.onRelease();
            }
        } else if (x > rangeX && oldX <= rangeX) {
            mEdgeGlowRight.onAbsorb((int) currentFlingVelocity);
            if (!mEdgeGlowLeft.isFinished()) {
                mEdgeGlowLeft.onRelease();
            }
        }
    }
}

源代码5 项目： android-chromium 文件： OverScrollGlow.java

/**
 * Pull leftover touch scroll distance into one of the edge glows as appropriate.
 *
 * @param x Current X scroll offset
 * @param y Current Y scroll offset
 * @param oldX Old X scroll offset
 * @param oldY Old Y scroll offset
 * @param maxX Maximum range for horizontal scrolling
 * @param maxY Maximum range for vertical scrolling
 */
public void pullGlow(int x, int y, int oldX, int oldY, int maxX, int maxY) {
    // Only show overscroll bars if there was no movement in any direction
    // as a result of scrolling.
    if (oldX == mHostView.getScrollX() && oldY == mHostView.getScrollY()) {
        // Don't show left/right glows if we fit the whole content.
        // Also don't show if there was vertical movement.
        if (maxX > 0) {
            final int pulledToX = oldX + mOverScrollDeltaX;
            if (pulledToX < 0) {
                mEdgeGlowLeft.onPull((float) mOverScrollDeltaX / mHostView.getWidth());
                if (!mEdgeGlowRight.isFinished()) {
                    mEdgeGlowRight.onRelease();
                }
            } else if (pulledToX > maxX) {
                mEdgeGlowRight.onPull((float) mOverScrollDeltaX / mHostView.getWidth());
                if (!mEdgeGlowLeft.isFinished()) {
                    mEdgeGlowLeft.onRelease();
                }
            }
            mOverScrollDeltaX = 0;
        }

        if (maxY > 0 || mHostView.getOverScrollMode() == View.OVER_SCROLL_ALWAYS) {
            final int pulledToY = oldY + mOverScrollDeltaY;
            if (pulledToY < 0) {
                mEdgeGlowTop.onPull((float) mOverScrollDeltaY / mHostView.getHeight());
                if (!mEdgeGlowBottom.isFinished()) {
                    mEdgeGlowBottom.onRelease();
                }
            } else if (pulledToY > maxY) {
                mEdgeGlowBottom.onPull((float) mOverScrollDeltaY / mHostView.getHeight());
                if (!mEdgeGlowTop.isFinished()) {
                    mEdgeGlowTop.onRelease();
                }
            }
            mOverScrollDeltaY = 0;
        }
    }
}

源代码6 项目： android-chromium 文件： OverScrollGlow.java

/**
 * Absorb leftover fling velocity into one of the edge glows as appropriate.
 *
 * @param x Current X scroll offset
 * @param y Current Y scroll offset
 * @param oldX Old X scroll offset
 * @param oldY Old Y scroll offset
 * @param rangeX Maximum range for horizontal scrolling
 * @param rangeY Maximum range for vertical scrolling
 * @param currentFlingVelocity Current fling velocity
 */
public void absorbGlow(int x, int y, int oldX, int oldY, int rangeX, int rangeY,
        float currentFlingVelocity) {
    if (rangeY > 0 || mHostView.getOverScrollMode() == View.OVER_SCROLL_ALWAYS) {
        if (y < 0 && oldY >= 0) {
            mEdgeGlowTop.onAbsorb((int) currentFlingVelocity);
            if (!mEdgeGlowBottom.isFinished()) {
                mEdgeGlowBottom.onRelease();
            }
        } else if (y > rangeY && oldY <= rangeY) {
            mEdgeGlowBottom.onAbsorb((int) currentFlingVelocity);
            if (!mEdgeGlowTop.isFinished()) {
                mEdgeGlowTop.onRelease();
            }
        }
    }

    if (rangeX > 0) {
        if (x < 0 && oldX >= 0) {
            mEdgeGlowLeft.onAbsorb((int) currentFlingVelocity);
            if (!mEdgeGlowRight.isFinished()) {
                mEdgeGlowRight.onRelease();
            }
        } else if (x > rangeX && oldX <= rangeX) {
            mEdgeGlowRight.onAbsorb((int) currentFlingVelocity);
            if (!mEdgeGlowLeft.isFinished()) {
                mEdgeGlowLeft.onRelease();
            }
        }
    }
}

源代码7 项目： AndroidAnimationExercise 文件： NestedScrollView.java

/**
 * 滑动功能核心代码
 * @param deltaX
 * @param deltaY
 * @param scrollX
 * @param scrollY
 * @param scrollRangeX
 * @param scrollRangeY
 * @param maxOverScrollX
 * @param maxOverScrollY
 * @param isTouchEvent
 * @return
 */
boolean overScrollByCompat(int deltaX, int deltaY,
                           int scrollX, int scrollY,
                           int scrollRangeX, int scrollRangeY,
                           int maxOverScrollX, int maxOverScrollY,
                           boolean isTouchEvent) {
    final int overScrollMode = getOverScrollMode();
    final boolean canScrollHorizontal =
            computeHorizontalScrollRange() > computeHorizontalScrollExtent();
    final boolean canScrollVertical =
            computeVerticalScrollRange() > computeVerticalScrollExtent();
    final boolean overScrollHorizontal = overScrollMode == View.OVER_SCROLL_ALWAYS
            || (overScrollMode == View.OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollHorizontal);
    final boolean overScrollVertical = overScrollMode == View.OVER_SCROLL_ALWAYS
            || (overScrollMode == View.OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollVertical);

    int newScrollX = scrollX + deltaX;
    if (!overScrollHorizontal) {
        maxOverScrollX = 0;
    }

    //此处修改原码
    if (scrollY < 0 && deltaY < 0) {//偏移往下滑动
        deltaY /= PULLDOWN_SCROLL;
    }

    int newScrollY = scrollY + deltaY;
    if (!overScrollVertical) {
        maxOverScrollY = 0;
    }

    // Clamp values if at the limits and record
    final int left = -maxOverScrollX;
    final int right = maxOverScrollX + scrollRangeX;
    //此处修改原码
    int top;
    if (isFling) {
        top = - maxOverScrollY;
    } else {
        top = -getPulldownScroll();
    }

    final int bottom = maxOverScrollY + scrollRangeY;

    boolean clampedX = false;
    if (newScrollX > right) {
        newScrollX = right;
        clampedX = true;
    } else if (newScrollX < left) {
        newScrollX = left;
        clampedX = true;
    }

    boolean clampedY = false;
    if (newScrollY > bottom) {//滑动越出界限
        newScrollY = bottom;
        clampedY = true;
    } else if (newScrollY < top) {
        newScrollY = top;
        clampedY = true;
    }

    if (clampedY && isFling) {//这里isFling时才回弹
        //Log.i("you", top + "  " + bottom + "  "+deltaY+" "+newScrollY+" "+getScrollRange());
        mScroller.springBack(newScrollX, newScrollY, 0, 0, 0, getScrollRange());
    }
    onOverScrolled(newScrollX, newScrollY, clampedX, clampedY);
    return clampedX || clampedY;
}

方法所在类

android.view.View