仿android5.0分享控件，Scroller先占半屏，慢慢滑动至全屏
夏知
以下代码都从android 5.0中电话界面扣出来的控件 MultiShrinkScroller
package com.jtv.toolmg.ui;
import com.jtv.toolmg.R;
import com.jtv.toolmg.activity.SchedulingUtils;
import android.animation.Animator;
import android.animation.Animator.AnimatorListener;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.animation.ValueAnimator.AnimatorUpdateListener;
import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.support.v4.view.ViewCompat;
import android.support.v4.widget.EdgeEffectCompat;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.VelocityTracker;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.view.animation.AnimationUtils;
import android.view.animation.Interpolator;
import android.widget.FrameLayout;
import android.widget.ScrollView;
import android.widget.Scroller;
import android.widget.TextView;
/**
* 仿android 5.0 电话界面的滚动
* <p>
*
* @author 更生
* @version 2016年6月1日
*/
public class MultiShrinkScroller extends FrameLayout {
private VelocityTracker mVelocityTracker;
private boolean mReceivedDown;
private boolean mIsBeingDragged;
private float[] mLastEventPosition = { 0, 0 };
private boolean mHasEverTouchedTheTop;
private int mMaximumHeaderHeight;
private int mMinimumHeaderHeight;
private int mIntermediateHeaderHeight;
private boolean mIsOpenContactSquare;
private Scroller mScroller;
private EdgeEffectCompat mEdgeGlowBottom;
private int mTouchSlop;
private int mMaximumVelocity = 10;
private int mMinimumVelocity;
private int mTransparentStartHeight;
private boolean mIsTwoPanel;// 是否有两个面板
private View mScrollViewChild;
private View mScrollView;
private View mTransparentView;
private static final float INTERMEDIATE_HEADER_HEIGHT_RATIO = 0.5f;
private static final float MAXIMUM_FLING_VELOCITY = 2000;
private static final int EXIT_FLING_ANIMATION_DURATION_MS = 300;
private MultiShrinkScrollerListener mListener;
// private Context context;
private View mToolbar;// 这个控件的宽度决定了头的高度
// private int mMaximumTitleMargin;
private int mMaximumTitleMargin;
private int mActionBarSize;
private View mPhotoViewContainer;
private TextView mLargeTextView;
public MultiShrinkScroller(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initFirst(context, attrs, defStyleAttr);
}
public MultiShrinkScroller(Context context) {
this(context, null);
}
public MultiShrinkScroller(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
private boolean shouldStartDrag(MotionEvent event) {
if (mIsBeingDragged) {
mIsBeingDragged = false;
return false;
}
switch (event.getAction()) {
// If we are in the middle of a fling and there is a down event, we'll steal it and
// start a drag.
case MotionEvent.ACTION_DOWN:
updateLastEventPosition(event);
if (!mScroller.isFinished()) {
startDrag();
return true;
} else {
mReceivedDown = true;
}
break;
// Otherwise, we will start a drag if there is enough motion in the direction we are
// capable of scrolling.
case MotionEvent.ACTION_MOVE:
if (motionShouldStartDrag(event)) {
updateLastEventPosition(event);
startDrag();
return true;
}
break;
}
return false;
}
private void updateLastEventPosition(MotionEvent event) {
mLastEventPosition[0] = event.getX();
mLastEventPosition[1] = event.getY();
}
private boolean motionShouldStartDrag(MotionEvent event) {
final float deltaX = event.getX() - mLastEventPosition[0];
final float deltaY = event.getY() - mLastEventPosition[1];
final boolean draggedX = (deltaX > mTouchSlop || deltaX < -mTouchSlop);
final boolean draggedY = (deltaY > mTouchSlop || deltaY < -mTouchSlop);
return draggedY && !draggedX;
}
private float updatePositionAndComputeDelta(MotionEvent event) {
final int VERTICAL = 1;
final float position = mLastEventPosition[VERTICAL];
updateLastEventPosition(event);
return position - mLastEventPosition[VERTICAL];
}
private void smoothScrollBy(int delta) {
if (delta == 0) {
// Delta=0 implies the code calling smoothScrollBy is sloppy. We should avoid doing
// this, since it prevents Views from being able to register any clicks for 250ms.
throw new IllegalArgumentException("Smooth scrolling by delta=0 is " + "pointless and harmful");
}
mScroller.startScroll(0, getScroll(), 0, delta);
invalidate();
}
/**
* Return ratio of non-transparent:viewgroup-height for this viewgroup at the starting position.
*/
public float getStartingTransparentHeightRatio() {
return getTransparentHeightRatio(mTransparentStartHeight);
}
private float getTransparentHeightRatio(int transparentHeight) {
final float heightRatio = (float) transparentHeight / getHeight();
// Clamp between [0, 1] in case this is called before height is initialized.
return 1.0f - Math.max(Math.min(1.0f, heightRatio), 0f);
}
/**
* Amount of transparent space above the header/toolbar.
*/
public int getScrollNeededToBeFullScreen() {
return getTransparentViewHeight();
}
private static final Interpolator sInterpolator = new Interpolator() {
/**
* {@inheritDoc}
*/
@Override
public float getInterpolation(float t) {
t -= 1.0f;
return t * t * t * t * t + 1.0f;
}
};
public void setHeaderHeight(int height) {
final ViewGroup.LayoutParams toolbarLayoutParams = mToolbar.getLayoutParams();
toolbarLayoutParams.height = height;
mToolbar.setLayoutParams(toolbarLayoutParams);
// updatePhotoTintAndDropShadow();
// updateHeaderTextSizeAndMargin();
}
/**
* Set the header size and padding, based on the current scroll position.
*/
// private void updateHeaderTextSizeAndMargin() {
// if (mIsTwoPanel) {
// // The text size stays at a constant size & location in two panel layouts.
// return;
// }
//
// // The pivot point for scaling should be middle of the starting side.
// if (isLayoutRtl()) {
// mLargeTextView.setPivotX(mLargeTextView.getWidth());
// } else {
// mLargeTextView.setPivotX(0);
// }
// mLargeTextView.setPivotY(mLargeTextView.getHeight() / 2);
//
// final int toolbarHeight = mToolbar.getLayoutParams().height;
// mPhotoTouchInterceptOverlay.setClickable(toolbarHeight != mMaximumHeaderHeight);
//
// if (toolbarHeight >= mMaximumHeaderHeight) {
// // Everything is full size when the header is fully expanded.
// mLargeTextView.setScaleX(1);
// mLargeTextView.setScaleY(1);
// setInterpolatedTitleMargins(1);
// return;
// }
//
// final float ratio = (toolbarHeight - mMinimumHeaderHeight)
// / (float) (mMaximumHeaderHeight - mMinimumHeaderHeight);
// final float minimumSize = mInvisiblePlaceholderTextView.getHeight();
// float bezierOutput = mTextSizePathInterpolator.getInterpolation(ratio);
// float scale = (minimumSize + (mMaximumHeaderTextSize - minimumSize) * bezierOutput) / mMaximumHeaderTextSize;
//
// // Clamp to reasonable/finite values before passing into framework. The values
// // can be wacky before the first pre-render.
// bezierOutput = (float) Math.min(bezierOutput, 1.0f);
// scale = (float) Math.min(scale, 1.0f);
//
// mLargeTextView.setScaleX(scale);
// mLargeTextView.setScaleY(scale);
// setInterpolatedTitleMargins(bezierOutput);
// updateJoynView();
// }
// private void updatePhotoTintAndDropShadow() {
// // Let's keep an eye on how long this method takes to complete. Right now, it takes ~0.2ms
// // on a Nexus 5. If it starts to get much slower, there are a number of easy optimizations
// // available.
// Trace.beginSection("updatePhotoTintAndDropShadow");
//
// if (mIsTwoPanel && !mPhotoView.isBasedOffLetterTile()) {
// // When in two panel mode, UX considers photo tinting unnecessary for non letter
// // tile photos.
// mTitleGradientDrawable.setAlpha(0xFF);
// mActionBarGradientDrawable.setAlpha(0xFF);
// return;
// }
//
// // We need to use toolbarLayoutParams to determine the height, since the layout
// // params can be updated before the height change is reflected inside the View#getHeight().
// final int toolbarHeight = getToolbarHeight();
//
// if (toolbarHeight <= mMinimumHeaderHeight && !mIsTwoPanel) {
// mPhotoViewContainer.setElevation(mToolbarElevation);
// } else {
// mPhotoViewContainer.setElevation(0);
// }
//
// // Reuse an existing mColorFilter (to avoid GC pauses) to change the photo's tint.
// mPhotoView.clearColorFilter();
//
// // Ratio of current size to maximum size of the header.
// final float ratio;
// // The value that "ratio" will have when the header is at its starting/intermediate size.
// final float intermediateRatio = calculateHeightRatio(
// (int) (mMaximumPortraitHeaderHeight * INTERMEDIATE_HEADER_HEIGHT_RATIO));
// if (!mIsTwoPanel) {
// ratio = calculateHeightRatio(toolbarHeight);
// } else {
// // We want the ratio and intermediateRatio to have the *approximate* values
// // they would have in portrait mode when at the intermediate position.
// ratio = intermediateRatio;
// }
//
// final float linearBeforeMiddle = Math.max(1 - (1 - ratio) / intermediateRatio, 0);
//
// // Want a function with a derivative of 0 at x=0. I don't want it to grow too
// // slowly before x=0.5. x^1.1 satisfies both requirements.
// final float EXPONENT_ALMOST_ONE = 1.1f;
// final float semiLinearBeforeMiddle = (float) Math.pow(linearBeforeMiddle, EXPONENT_ALMOST_ONE);
// mColorMatrix.reset();
// mColorMatrix.setSaturation(semiLinearBeforeMiddle);
// mColorMatrix
// .postConcat(alphaMatrix(1 - mWhiteBlendingPathInterpolator.getInterpolation(1 - ratio), Color.WHITE));
//
// final float colorAlpha;
// if (mPhotoView.isBasedOffLetterTile()) {
// // Since the letter tile only has white and grey, tint it more slowly. Otherwise
// // it will be completely invisible before we reach the intermediate point. The values
// // for TILE_EXPONENT and slowingFactor are chosen to achieve DESIRED_INTERMEDIATE_ALPHA
// // at the intermediate/starting position.
// final float DESIRED_INTERMEDIATE_ALPHA = 0.9f;
// final float TILE_EXPONENT = 1.5f;
// final float slowingFactor = (float) ((1 - intermediateRatio) / intermediateRatio
// / (1 - Math.pow(1 - DESIRED_INTERMEDIATE_ALPHA, 1 / TILE_EXPONENT)));
// float linearBeforeMiddleish = Math.max(1 - (1 - ratio) / intermediateRatio / slowingFactor, 0);
// colorAlpha = 1 - (float) Math.pow(linearBeforeMiddleish, TILE_EXPONENT);
// mColorMatrix.postConcat(alphaMatrix(colorAlpha, mHeaderTintColor));
// } else {
// colorAlpha = 1 - semiLinearBeforeMiddle;
// mColorMatrix.postConcat(multiplyBlendMatrix(mHeaderTintColor, colorAlpha));
// }
//
// mPhotoView.setColorFilter(new ColorMatrixColorFilter(mColorMatrix));
// // Tell the photo view what tint we are trying to achieve. Depending on the type of
// // drawable used, the photo view may or may not use this tint.
// mPhotoView.setTint(mHeaderTintColor);
//
// final int gradientAlpha = (int) (255 * linearBeforeMiddle);
// mTitleGradientDrawable.setAlpha(gradientAlpha);
// mActionBarGradientDrawable.setAlpha(gradientAlpha);
//
// Trace.endSection();
// }
public void initValue(Activity con, MultiShrinkScrollerListener listener) {
mScrollView = (ScrollView) con.findViewById(R.id.content_scroller);
mScrollViewChild = con.findViewById(R.id.card_container);
mTransparentView = con.findViewById(R.id.transparent_view);
mToolbar = con.findViewById(R.id.toolbar_parent);
mPhotoViewContainer = findViewById(R.id.toolbar_parent);
mLargeTextView = (TextView) findViewById(R.id.large_title);
this.mListener = listener;
defaultDraw();
}
private void setTransparentViewHeight(int height) {
mTransparentView.getLayoutParams().height = height;
mTransparentView.setLayoutParams(mTransparentView.getLayoutParams());
}
private void scrollUp(int delta) {
if (getTransparentViewHeight() != 0) {
final int originalValue = getTransparentViewHeight();
setTransparentViewHeight(getTransparentViewHeight() - delta);
setTransparentViewHeight(Math.max(0, getTransparentViewHeight()));
delta -= originalValue - getTransparentViewHeight();
}
final ViewGroup.LayoutParams toolbarLayoutParams = mToolbar.getLayoutParams();
if (toolbarLayoutParams.height > getFullyCompressedHeaderHeight()) {
final int originalValue = toolbarLayoutParams.height;
toolbarLayoutParams.height -= delta;
toolbarLayoutParams.height = Math.max(toolbarLayoutParams.height, getFullyCompressedHeaderHeight());
mToolbar.setLayoutParams(toolbarLayoutParams);
delta -= originalValue - toolbarLayoutParams.height;
}
mScrollView.scrollBy(0, delta);
}
private void scrollDown(int delta) {
if (mScrollView.getScrollY() > 0) {
final int originalValue = mScrollView.getScrollY();
mScrollView.scrollBy(0, delta);
delta -= mScrollView.getScrollY() - originalValue;
}
final ViewGroup.LayoutParams toolbarLayoutParams = mToolbar.getLayoutParams();
if (toolbarLayoutParams.height < getMaximumScrollableHeaderHeight()) {
final int originalValue = toolbarLayoutParams.height;
toolbarLayoutParams.height -= delta;
toolbarLayoutParams.height = Math.min(toolbarLayoutParams.height, getMaximumScrollableHeaderHeight());
mToolbar.setLayoutParams(toolbarLayoutParams);
delta -= originalValue - toolbarLayoutParams.height;
}
setTransparentViewHeight(getTransparentViewHeight() - delta);
if (getScrollUntilOffBottom() <= 0) {
post(new Runnable() {
@Override
public void run() {
if (mListener != null) {
mListener.onScrolledOffBottom();
// No other messages need to be sent to the listener.
mListener = null;
}
}
});
}
}
@Override
public void scrollTo(int x, int y) {
final int delta = y - getScroll();
boolean wasFullscreen = getScrollNeededToBeFullScreen() <= 0;
if (delta > 0) {
scrollUp(delta);
} else {
scrollDown(delta);
}
// updatePhotoTintAndDropShadow();
// updateHeaderTextSizeAndMargin();
final boolean isFullscreen = getScrollNeededToBeFullScreen() <= 0;
mHasEverTouchedTheTop |= isFullscreen;
if (mListener != null) {
if (wasFullscreen && !isFullscreen) {
mListener.onExitFullscreen();
} else if (!wasFullscreen && isFullscreen) {
mListener.onEnterFullscreen();
}
if (!isFullscreen || !wasFullscreen) {
mListener.onTransparentViewHeightChange(getTransparentHeightRatio(getTransparentViewHeight()));
}
}
}
private void defaultDraw() {
SchedulingUtils.doOnPreDraw(this, /* drawNextFrame = */ false, new Runnable() {
@Override
public void run() {
/** M: Bug Fix for ALPS1747395 @{ */
if (getContext() == null) {
return;
}
/** }@ */
/// M: bug fix for ALPS01768247
mIsTwoPanel = getResources().getBoolean(R.bool.quickcontact_two_panel);
if (!mIsTwoPanel) {
// We never want the height of the photo view to exceed its width.
mMaximumHeaderHeight = mPhotoViewContainer.getWidth();
mIntermediateHeaderHeight = (int) (mMaximumHeaderHeight * INTERMEDIATE_HEADER_HEIGHT_RATIO);
}
// final boolean isLandscape = getResources()
// .getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE;
// mMaximumPortraitHeaderHeight = isLandscape ? getHeight() : mPhotoViewContainer.getWidth();
setHeaderHeight(getMaximumScrollableHeaderHeight());
// mMaximumHeaderTextSize = mLargeTextView.getHeight();
if (mIsTwoPanel) {
mMaximumHeaderHeight = getHeight();
mMinimumHeaderHeight = mMaximumHeaderHeight;
mIntermediateHeaderHeight = mMaximumHeaderHeight;
// Permanently set photo width and height.
final TypedValue photoRatio = new TypedValue();
getResources().getValue(R.vals.quickcontact_photo_ratio, photoRatio, /* resolveRefs = */ true);
final ViewGroup.LayoutParams photoLayoutParams = mPhotoViewContainer.getLayoutParams();
photoLayoutParams.height = mMaximumHeaderHeight;
photoLayoutParams.width = (int) (mMaximumHeaderHeight * photoRatio.getFloat());
mPhotoViewContainer.setLayoutParams(photoLayoutParams);
// Permanently set title width and margin.
final FrameLayout.LayoutParams largeTextLayoutParams = (FrameLayout.LayoutParams) mLargeTextView
.getLayoutParams();
largeTextLayoutParams.width = photoLayoutParams.width - largeTextLayoutParams.leftMargin
- largeTextLayoutParams.rightMargin;
largeTextLayoutParams.gravity = Gravity.BOTTOM | Gravity.START;
mLargeTextView.setLayoutParams(largeTextLayoutParams);
} else {
// Set the width of mLargeTextView as if it was nested inside
// mPhotoViewContainer.
mLargeTextView.setWidth(mPhotoViewContainer.getWidth() - 2 * mMaximumTitleMargin);
}
// updateHeaderTextSizeAndMargin();
// configureGradientViewHeights();
}
});
}
private boolean isLayoutRtl() {
return false;
}
@Override
public void draw(Canvas canvas) {
super.draw(canvas);
if (!mEdgeGlowBottom.isFinished()) {
final int restoreCount = canvas.save();
final int width = getWidth() - getPaddingLeft() - getPaddingRight();
final int height = getHeight();
// Draw the EdgeEffect on the bottom of the Window (Or a little bit below the bottom
// of the Window if we start to scroll upwards while EdgeEffect is visible). This
// does not need to consider the case where this MultiShrinkScroller doesn't fill
// the Window, since the nested ScrollView should be set to fillViewport.
canvas.translate(-width + getPaddingLeft(), height + getMaximumScrollUpwards() - getScroll());
canvas.rotate(180, width, 0);
if (mIsTwoPanel) {
// Only show the EdgeEffect on the bottom of the ScrollView.
mEdgeGlowBottom.setSize(mScrollView.getWidth(), height);
if (isLayoutRtl()) {
canvas.translate(mPhotoViewContainer.getWidth(), 0);
}
} else {
mEdgeGlowBottom.setSize(width, height);
}
if (mEdgeGlowBottom.draw(canvas)) {
postInvalidateOnAnimationCurr();
}
canvas.restoreToCount(restoreCount);
}
}
// private void calculateCollapsedLargeTitlePadding() {
// final Rect largeTextViewRect = new Rect();
// final Rect invisiblePlaceholderTextViewRect = new Rect();
// mToolbar.getBoundsOnScreen(largeTextViewRect);
// mInvisiblePlaceholderTextView.getBoundsOnScreen(invisiblePlaceholderTextViewRect);
// if (isLayoutRtl()) {
// mCollapsedTitleStartMargin = largeTextViewRect.right
// - invisiblePlaceholderTextViewRect.right;
// } else {
// mCollapsedTitleStartMargin = invisiblePlaceholderTextViewRect.left
// - largeTextViewRect.left;
// }
//
// // Distance between top of toolbar to the center of the target rectangle.
// final int desiredTopToCenter = (
// invisiblePlaceholderTextViewRect.top + invisiblePlaceholderTextViewRect.bottom)
// / 2 - largeTextViewRect.top;
// // Padding needed on the mLargeTextView so that it has the same amount of
// // padding as the target rectangle.
// mCollapsedTitleBottomMargin = desiredTopToCenter - mLargeTextView.getHeight() / 2;
// }
public interface MultiShrinkScrollerListener {
void onScrolledOffBottom();
void onStartScrollOffBottom();
void onTransparentViewHeightChange(float ratio);
void onEntranceAnimationDone();
void onEnterFullscreen();
void onExitFullscreen();
}
public void initFirst(Context context, AttributeSet attrs, int defStyleAttr) {
final ViewConfiguration configuration = ViewConfiguration.get(context);
setFocusable(false);
// Drawing must be enabled in order to support EdgeEffect
setWillNotDraw(/* willNotDraw = */ false);
mEdgeGlowBottom = new EdgeEffectCompat(context);
mScroller = new Scroller(context, sInterpolator);
mTouchSlop = configuration.getScaledTouchSlop();
mMinimumVelocity = configuration.getScaledMinimumFlingVelocity();
mMaximumVelocity = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, MAXIMUM_FLING_VELOCITY,
getResources().getDisplayMetrics());
// 控制着初始化头部空白的高度
mTransparentStartHeight = (int) getResources().getDimension(R.dimen.quickcontact_starting_empty_height);
// mToolbarElevation = getResources().getDimension(
// R.dimen.quick_contact_toolbar_elevation);
mIsTwoPanel = getResources().getBoolean(R.bool.quickcontact_two_panel);
// mMaximumTitleMargin = (int) getResources().getDimension(
// R.dimen.quickcontact_title_initial_margin);
final TypedArray attributeArray = context.obtainStyledAttributes(new int[] { android.R.attr.actionBarSize });
mActionBarSize = attributeArray.getDimensionPixelSize(0, 0);
mMinimumHeaderHeight = mActionBarSize;
// This value is approximately equal to the portrait ActionBar size. It isn't exactly the
// same, since the landscape and portrait ActionBar sizes can be different.
// mMinimumPortraitHeaderHeight = mMinimumHeaderHeight;
attributeArray.recycle();
}
@Override
public boolean onTouchEvent(MotionEvent event) {
final int action = event.getAction();
if (mVelocityTracker == null) {
mVelocityTracker = VelocityTracker.obtain();
}
mVelocityTracker.addMovement(event);
if (!mIsBeingDragged) {
if (shouldStartDrag(event)) {
return true;
}
if (action == MotionEvent.ACTION_UP && mReceivedDown) {
mReceivedDown = false;
return performClick();
}
return true;
}
switch (action) {
case MotionEvent.ACTION_MOVE:
final float delta = updatePositionAndComputeDelta(event);
scrollTo(0, getScroll() + (int) delta);
mReceivedDown = false;
if (mIsBeingDragged) {
final int distanceFromMaxScrolling = getMaximumScrollUpwards() - getScroll();
if (delta > distanceFromMaxScrolling) {
// The ScrollView is being pulled upwards while there is no more
// content offscreen, and the view port is already fully expanded.
mEdgeGlowBottom.onPull(delta / getHeight(), 1 - event.getX() / getWidth());
}
if (!mEdgeGlowBottom.isFinished()) {
postInvalidateOnAnimationCurr();
}
}
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
stopDrag(action == MotionEvent.ACTION_CANCEL);
mReceivedDown = false;
break;
}
return true;
}
public void postInvalidateOnAnimationCurr() {
// postInvalidateOnAnimation();
ViewCompat.postInvalidateOnAnimation(this);
}
/**
* Returns the minimum size that we want to compress the header to, given that we don't want to allow the the
* ScrollView to scroll unless there is new content off of the edge of ScrollView.
*/
private int getFullyCompressedHeaderHeight() {
return Math.min(Math.max((getHeightTitle() - getOverflowingChildViewSize()), mMinimumHeaderHeight),
getMaximumScrollableHeaderHeight());
}
private int getHeightTitle() {
if (mToolbar == null)
return 1;
android.view.ViewGroup.LayoutParams layoutParams = mToolbar.getLayoutParams();
if (layoutParams == null) {
return 0;
}
return layoutParams.height;
}
private int getMaximumScrollableHeaderHeight() {
return mIsOpenContactSquare ? mMaximumHeaderHeight : mIntermediateHeaderHeight;
}
private int getOverflowingChildViewSize() {
final int usedScrollViewSpace = mScrollViewChild.getHeight();
return -getHeight() + usedScrollViewSpace + getHeightTitle();
}
private int getMaximumScrollUpwards() {
if (!mIsTwoPanel) {
return mTransparentStartHeight
// How much the Header view can compress
+ getMaximumScrollableHeaderHeight() - getFullyCompressedHeaderHeight()
// How much the ScrollView can scroll. 0, if child is smaller than ScrollView.
+ Math.max(0, mScrollViewChild.getHeight() - getHeight() + getFullyCompressedHeaderHeight());
} else {
return mTransparentStartHeight
// How much the ScrollView can scroll. 0, if child is smaller than ScrollView.
+ Math.max(0, mScrollViewChild.getHeight() - getHeight());
}
}
private void startDrag() {
mIsBeingDragged = true;
mScroller.abortAnimation();
}
private void fling(float velocity) {
if (Math.abs(mMaximumVelocity) < Math.abs(velocity)) {
velocity = -mMaximumVelocity * Math.signum(velocity);
}
// For reasons I do not understand, scrolling is less janky when maxY=Integer.MAX_VALUE
// then when maxY is set to an actual value.
mScroller.fling(0, getScroll(), 0, (int) velocity, 0, 0, -Integer.MAX_VALUE, Integer.MAX_VALUE);
invalidate();
}
private void stopDrag(boolean cancelled) {
mIsBeingDragged = false;
if (!cancelled && getChildCount() > 0) {
final float velocity = getCurrentVelocity();
if (velocity > mMinimumVelocity || velocity < -mMinimumVelocity) {
fling(-velocity);
onDragFinished(mScroller.getFinalY() - mScroller.getStartY());
} else {
onDragFinished(/* flingDelta = */ 0);
}
} else {
onDragFinished(/* flingDelta = */ 0);
}
if (mVelocityTracker != null) {
mVelocityTracker.recycle();
mVelocityTracker = null;
}
mEdgeGlowBottom.onRelease();
}
private static final int PIXELS_PER_SECOND = 1000;
private float getCurrentVelocity() {
if (mVelocityTracker == null) {
return 0;
}
mVelocityTracker.computeCurrentVelocity(PIXELS_PER_SECOND, mMaximumVelocity);
return mVelocityTracker.getYVelocity();
}
private void onDragFinished(int flingDelta) {
if (!snapToTop(flingDelta)) {
// The drag/fling won't result in the content at the top of the Window. Consider
// snapping the content to the bottom of the window.
snapToBottom(flingDelta);
}
}
/**
* If needed, snap the subviews to the top of the Window.
*/
private boolean snapToTop(int flingDelta) {
if (mHasEverTouchedTheTop) {
// Only when first interacting with QuickContacts should QuickContacts snap to the top
// of the screen. After this, QuickContacts can be placed most anywhere on the screen.
return false;
}
final int requiredScroll = -getScroll_ignoreOversizedHeaderForSnapping() + mTransparentStartHeight;
if (-getScroll_ignoreOversizedHeaderForSnapping() - flingDelta < 0
&& -getScroll_ignoreOversizedHeaderForSnapping() - flingDelta > -mTransparentStartHeight
&& requiredScroll != 0) {
// We finish scrolling above the empty starting height, and aren't projected
// to fling past the top of the Window, so elastically snap the empty space shut.
mScroller.forceFinished(true);
smoothScrollBy(requiredScroll);
return true;
}
return false;
}
private int getScroll_ignoreOversizedHeaderForSnapping() {
return mTransparentStartHeight - getTransparentViewHeight()
+ Math.max(getMaximumScrollableHeaderHeight() - getToolbarHeight(), 0) + mScrollView.getScrollY();
}
private int getTransparentViewHeight() {
return mTransparentView.getLayoutParams().height;
}
public int getToolbarHeight() {
return getHeightTitle();
}
public void setScroll(int scroll) {
scrollTo(0, scroll);
}
/**
* Returns the total amount scrolled inside the nested ScrollView + the amount of shrinking performed on the
* ToolBar. This is the value inspected by animators.
*/
public int getScroll() {
return mTransparentStartHeight - getTransparentViewHeight() + getMaximumScrollableHeaderHeight()
- getToolbarHeight() + mScrollView.getScrollY();
}
/**
* If needed, scroll all the subviews off the bottom of the Window.
*/
private void snapToBottom(int flingDelta) {
if (mHasEverTouchedTheTop) {
// If QuickContacts has touched the top of the screen previously, then we
// will less aggressively snap to the bottom of the screen.
final float predictedScrollPastTop = -getScroll() + mTransparentStartHeight - flingDelta;
final boolean isLandscape = getResources()
.getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE;
if (isLandscape) {
// In landscape orientation, we dismiss the QC once it goes below the starting
// starting offset that is used when QC starts in collapsed mode.
if (predictedScrollPastTop > mTransparentStartHeight) {
scrollOffBottom();
}
} else {
// In portrait orientation, we dismiss the QC once it goes below
// mIntermediateHeaderHeight within the bottom of the screen.
final float heightMinusHeader = getHeight() - mIntermediateHeaderHeight;
if (predictedScrollPastTop > heightMinusHeader) {
scrollOffBottom();
}
}
return;
}
if (-getScroll() - flingDelta > 0) {
scrollOffBottom();
}
}
private int getScrollUntilOffBottom() {
return getHeight() + getScroll_ignoreOversizedHeaderForSnapping() - mTransparentStartHeight;
}
private final AnimatorListener mSnapToBottomListener = new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
if (getScrollUntilOffBottom() > 0 && mListener != null) {
// Due to a rounding error, after the animation finished we haven't fully scrolled
// off the screen. Lie to the listener: tell it that we did scroll off the screen.
mListener.onScrolledOffBottom();
// No other messages need to be sent to the listener.
mListener = null;
}
}
};
/**
* @param scrollToCurrentPosition if true, will scroll from the bottom of the screen to the current position.
* Otherwise, will scroll from the bottom of the screen to the top of the screen.
*/
public void scrollUpForEntranceAnimation(boolean scrollToCurrentPosition) {
final int currentPosition = getScroll();
final int bottomScrollPosition = currentPosition - (getHeight() - getTransparentViewHeight()) + 1;
Interpolator interpolator = AnimationUtils.loadInterpolator(getContext(),
android.R.interpolator.linear_out_slow_in);
final int desiredValue = currentPosition
+ (scrollToCurrentPosition ? currentPosition : getTransparentViewHeight());
final ObjectAnimator animator = ObjectAnimator.ofInt(this, "scroll", bottomScrollPosition, desiredValue);
animator.setInterpolator(interpolator);
animator.addUpdateListener(new AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
if (animation.getAnimatedValue().equals(desiredValue) && mListener != null) {
mListener.onEntranceAnimationDone();
}
}
});
animator.start();
}
/**
* Interpolator that enforces a specific starting velocity. This is useful to avoid a discontinuity between dragging
* speed and flinging speed.
*
* Similar to a {@link android.view.animation.AccelerateInterpolator} in the sense that getInterpolation() is a
* quadratic function.
*/
private static class AcceleratingFlingInterpolator implements Interpolator {
private final float mStartingSpeedPixelsPerFrame;
private final float mDurationMs;
private final int mPixelsDelta;
private final float mNumberFrames;
public AcceleratingFlingInterpolator(int durationMs, float startingSpeedPixelsPerSecond, int pixelsDelta) {
mStartingSpeedPixelsPerFrame = startingSpeedPixelsPerSecond / getRefreshRate();
mDurationMs = durationMs;
mPixelsDelta = pixelsDelta;
mNumberFrames = mDurationMs / getFrameIntervalMs();
}
@Override
public float getInterpolation(float input) {
final float animationIntervalNumber = mNumberFrames * input;
final float linearDelta = (animationIntervalNumber * mStartingSpeedPixelsPerFrame) / mPixelsDelta;
// Add the results of a linear interpolator (with the initial speed) with the
// results of a AccelerateInterpolator.
if (mStartingSpeedPixelsPerFrame > 0) {
return Math.min(input * input + linearDelta, 1);
} else {
// Initial fling was in the wrong direction, make sure that the quadratic component
// grows faster in order to make up for this.
return Math.min(input * (input - linearDelta) + linearDelta, 1);
}
}
private float getRefreshRate() {
// DisplayInfo di = DisplayManagerGlobal.getInstance().getDisplayInfo(Display.DEFAULT_DISPLAY);
return 1;
}
public long getFrameIntervalMs() {
return (long) (1000 / getRefreshRate());
}
}
// 滚动到底部
public void scrollOffBottom() {
final Interpolator interpolator = new AcceleratingFlingInterpolator(EXIT_FLING_ANIMATION_DURATION_MS,
getCurrentVelocity(), getScrollUntilOffBottom());
mScroller.forceFinished(true);
ObjectAnimator translateAnimation = ObjectAnimator.ofInt(this, "scroll",
getScroll() - getScrollUntilOffBottom());
translateAnimation.setRepeatCount(0);
translateAnimation.setInterpolator(interpolator);
translateAnimation.setDuration(EXIT_FLING_ANIMATION_DURATION_MS);
translateAnimation.addListener(mSnapToBottomListener);
translateAnimation.start();
if (mListener != null) {
mListener.onStartScrollOffBottom();
}
}
/**** --------------------工具------------------ ****/
/**
* 运行时动画,不用
*/
private void showActivity() {
if (this != null) {
this.setVisibility(View.VISIBLE);
SchedulingUtils.doOnPreDraw(this, /* drawNextFrame = */ false, new Runnable() {
@Override
public void run() {
runEntranceAnimation();
}
});
}
}
private int mExtraMode;
public static final int MODE_FULLY_EXPANDED = 4;// 滚动全屏
private static final int DEFAULT_SCRIM_ALPHA = 0xC8;
private void runEntranceAnimation() {
this.scrollUpForEntranceAnimation(mExtraMode != MODE_FULLY_EXPANDED);
}
/**
* 设置背景透明
*
* @param mHasAlreadyBeenOpened
*/
private void setBackGroundAlpha(final boolean mHasAlreadyBeenOpened) {
SchedulingUtils.doOnPreDraw(this, /* drawNextFrame = */ true, new Runnable() {
@Override
public void run() {
int SCRIM_COLOR = Color.argb(DEFAULT_SCRIM_ALPHA, 0, 0, 0);
ColorDrawable mWindowScrim = new ColorDrawable(SCRIM_COLOR);
// mWindowScrim.setAlpha((int) (0xFF * ratio));//设置背景
if (!mHasAlreadyBeenOpened) {
final float alphaRatio = mExtraMode == MODE_FULLY_EXPANDED ? 1
: getStartingTransparentHeightRatio();
final int duration = getResources().getInteger(android.R.integer.config_shortAnimTime);
final int desiredAlpha = (int) (0xFF * alphaRatio);
ObjectAnimator o = ObjectAnimator.ofInt(mWindowScrim, "alpha", 0, desiredAlpha)
.setDuration(duration);
o.start();
}
}
});
}
}
package com.jtv.toolmg.ui;
import android.content.Context;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ScrollView;
/**
* A {@link ScrollView} that doesn't respond or intercept touch events.
*
* This is used in combination with {@link com.android.contacts.widget.MultiShrinkScroller} so
* that MultiShrinkScroller can handle all scrolling & saving.
*/
public class TouchlessScrollView extends ScrollView {
public TouchlessScrollView(Context context) {
this(context, null);
}
public TouchlessScrollView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public TouchlessScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
protected Parcelable onSaveInstanceState() {
// Do not save the current scroll position. Always store scrollY=0 and delegate
// responsibility of saving state to the MultiShrinkScroller.
final int scrollY = getScrollY();
setScrollY(0);
final Parcelable returnValue = super.onSaveInstanceState();
setScrollY(scrollY);
return returnValue;
}
/**
* {@inheritDoc}
*/
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
return false;
}
/**
* {@inheritDoc}
*/
@Override
public boolean onTouchEvent(MotionEvent event) {
return false;
}
}package com.jtv.toolmg.activity;
import com.jtv.toolmg.R;
import com.jtv.toolmg.ui.MultiShrinkScroller;
import com.jtv.toolmg.ui.MultiShrinkScroller.MultiShrinkScrollerListener;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
public class Test extends Activity {
private MultiShrinkScroller mScroller;
private boolean mHasAlreadyBeenOpened;
private int mExtraMode;
private boolean mIsExitAnimationInProgress;
public static final int MODE_FULLY_EXPANDED = 4;
private static final int DEFAULT_SCRIM_ALPHA = 0xC8;
private static final int SCRIM_COLOR = Color.argb(DEFAULT_SCRIM_ALPHA, 0, 0, 0);
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test);
getWindow().setStatusBarColor(Color.TRANSPARENT);
mScroller = (MultiShrinkScroller) findViewById(R.id.multiscroller);
mScroller.initValue(this, mMultiShrinkScrollerListener);
mWindowScrim = new ColorDrawable(SCRIM_COLOR);
mWindowScrim.setAlpha(0);
// showActivity();
getWindow().setBackgroundDrawable(mWindowScrim);
final View transparentView = findViewById(R.id.transparent_view);
if (mScroller != null) {
transparentView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
mScroller.scrollOffBottom();
}
});
}
// mScroller.showActivity();
// mScroller.setBackGroundAlpha(false);
}
@Override
public void onBackPressed() {
if (mScroller != null) {
if (!mIsExitAnimationInProgress) {
mScroller.scrollOffBottom();
}
} else {
super.onBackPressed();
}
}
private void showActivity() {
if (mScroller != null) {
mScroller.setVisibility(View.VISIBLE);
SchedulingUtils.doOnPreDraw(mScroller, /* drawNextFrame = */ false, new Runnable() {
@Override
public void run() {
runEntranceAnimation();
}
});
}
}
private void runEntranceAnimation() {
if (mHasAlreadyBeenOpened) {
return;
}
mHasAlreadyBeenOpened = true;
mScroller.scrollUpForEntranceAnimation(mExtraMode != MODE_FULLY_EXPANDED);
}
private ColorDrawable mWindowScrim;
final MultiShrinkScrollerListener mMultiShrinkScrollerListener = new MultiShrinkScrollerListener() {
private boolean mIsEntranceAnimationFinished;
@Override
public void onScrolledOffBottom() {
finish();
}
@Override
public void onEnterFullscreen() {
// updateStatusBarColor();
}
@Override
public void onExitFullscreen() {
// updateStatusBarColor();
}
@Override
public void onStartScrollOffBottom() {
mIsExitAnimationInProgress = true;
}
@Override
public void onEntranceAnimationDone() {
mIsEntranceAnimationFinished = true;
}
@Override
public void onTransparentViewHeightChange(float ratio) {
if (mIsEntranceAnimationFinished) {
mWindowScrim.setAlpha((int) (0xFF * ratio));
}
}
};
@Override
public void finish() {
super.finish();
overridePendingTransition(0, 0);
}
}
xml布局
<?xml version="1.0" encoding="utf-8"?>
<com.jtv.toolmg.ui.MultiShrinkScroller xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/multiscroller"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/transparent"
android:descendantFocusability="afterDescendants"
android:focusable="true"
android:focusableInTouchMode="true"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<View
android:id="@+id/transparent_view"
android:layout_width="match_parent"
android:layout_height="@dimen/quickcontact_starting_empty_height" />
<FrameLayout
android:id="@+id/toolbar_parent"
android:layout_width="0dp"
android:layout_height="match_parent" >
</FrameLayout>
<com.jtv.toolmg.ui.TouchlessScrollView
android:id="@+id/content_scroller"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/red"
android:fillViewport="true" >
<!-- All the cards should be inserted into this LinearLayout -->
<LinearLayout
android:id="@+id/card_container"
android:layout_width="match_parent"
android:layout_height="200dp"
android:background="@color/white"
android:orientation="vertical"
android:paddingTop="10dp" >
<LinearLayout
android:id="@+id/ll_num1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal"
android:padding="5dp" >
<TextView
android:id="@+id/tv_title1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/package_number" />
<TextView
android:id="@+id/tv_reducenum1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:background="@drawable/selecter_btn_conners"
android:gravity="center"
android:onClick="onClick"
android:padding="5dp"
android:text="-" />
<EditText
android:id="@+id/et_num1"
style="@style/base_text_color"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_weight="1"
android:background="@drawable/edit_style_line"
android:enabled="true"
android:focusable="true"
android:gravity="center"
android:inputType="number" />
<TextView
android:id="@+id/tv_addnum1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:background="@drawable/selecter_btn_conners"
android:gravity="center"
android:onClick="onClick"
android:padding="5dp"
android:text="+" />
</LinearLayout>
<LinearLayout
android:id="@+id/ll_num2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal"
android:padding="5dp"
android:visibility="visible" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="未下道旧料" />
<TextView
android:id="@+id/tv_reducenum2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:background="@drawable/selecter_btn_conners"
android:gravity="center"
android:onClick="onClick"
android:padding="5dp"
android:text="-" />
<EditText
android:id="@+id/et_num2"
style="@style/base_text_color"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_weight="1"
android:background="@drawable/edit_style_line"
android:enabled="true"
android:focusable="true"
android:gravity="center"
android:inputType="number" />
<TextView
android:id="@+id/tv_addnum2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:background="@drawable/selecter_btn_conners"
android:gravity="center"
android:onClick="onClick"
android:padding="5dp"
android:text="+" />
</LinearLayout>
<LinearLayout
android:id="@+id/ll_num3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal"
android:padding="5dp"
android:visibility="visible" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="剩余新料" />
<TextView
android:id="@+id/tv_reducenum3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:background="@drawable/selecter_btn_conners"
android:gravity="center"
android:onClick="onClick"
android:padding="5dp"
android:text="-" />
<EditText
android:id="@+id/et_num3"
style="@style/base_text_color"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_weight="1"
android:background="@drawable/edit_style_line"
android:enabled="true"
android:focusable="true"
android:gravity="center"
android:inputType="number" />
<TextView
android:id="@+id/tv_addnum3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:background="@drawable/selecter_btn_conners"
android:gravity="center"
android:onClick="onClick"
android:padding="5dp"
android:text="+" />
</LinearLayout>
</LinearLayout>
</com.jtv.toolmg.ui.TouchlessScrollView>
</LinearLayout>
<TextView
android:id="@+id/large_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top|start"
android:layout_marginBottom="@dimen/quickcontact_title_initial_margin"
android:layout_marginEnd="@dimen/quickcontact_title_initial_margin"
android:layout_marginStart="@dimen/quickcontact_title_initial_margin"
android:ellipsize="end"
android:importantForAccessibility="no"
android:text="测试"
android:textAlignment="viewStart"
android:textColor="@color/blue_text" >
</TextView>
</com.jtv.toolmg.ui.MultiShrinkScroller> <dimen name="quickcontact_starting_empty_height">280dp</dimen>
<dimen name="quickcontact_title_initial_margin">16dp</dimen><bool name="quickcontact_two_panel">false</bool>
<bool name="contact_all_list_show_card_frame">false</bool>
<item name="quickcontact_photo_ratio" type="vals" format="float">0.7</item>
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