1.布局文件
<com.eiboran.ace.widget.pull.MySwipeRefreshLayout
android:id="@+id/refreshLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
my:direction="both">
<android.support.v7.widget.RecyclerView
android:id="@+id/rv_have_in"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</com.eiboran.ace.widget.pull.MySwipeRefreshLayout>
2.下拉刷新、加载更多代码
public class MySwipeRefreshLayout extends ViewGroup {
public boolean isTop;
public int firstIndex = 0;
public int index = firstIndex;
public static final int DEFAULT = MaterialProgressDrawable.DEFAULT;
private static final int MAX_ALPHA = 255;
private static final int STARTING_PROGRESS_ALPHA = (int) (.3f * MAX_ALPHA);
private static final int CIRCLE_DIAMETER = 40;
private static final float DECELERATE_INTERPOLATION_FACTOR = 2f;
private static final int INVALID_POINTER = -1;
private static final float DRAG_RATE = .5f;
private static final float MAX_PROGRESS_ANGLE = .8f;
private static final int SCALE_DOWN_DURATION = 150;
private static final int ALPHA_ANIMATION_DURATION = 300;
private static final int ANIMATE_TO_TRIGGER_DURATION = 200;
private static final int ANIMATE_TO_START_DURATION = 200;
private static final int CIRCLE_BG_LIGHT = 0xFFFAFAFA;
private static final int DEFAULT_CIRCLE_TARGET = 64;
private View mTarget;
private SwipyRefreshLayoutDirection mDirection;
private boolean mBothDirection;
private OnRefreshListener mListener;
private boolean mRefreshing = false;
private int mTouchSlop;
private float mTotalDragDistance = -1;
private int mMediumAnimationDuration;
private int mCurrentTargetOffsetTop;
private boolean mOriginalOffsetCalculated = false;
private float mInitialMotionY;
private boolean mIsBeingDragged;
private int mActivePointerId = INVALID_POINTER;
private boolean mScale;
private boolean mReturningToStart;
private final DecelerateInterpolator mDecelerateInterpolator;
private static final int[] LAYOUT_ATTRS = new int[]{
android.R.attr.enabled
};
private CircleImageView mCircleView;
private int mCircleViewIndex = -1;
protected int mFrom;
private float mStartingScale;
protected int mOriginalOffsetTop;
private MaterialProgressDrawable mProgress;
private Animation mScaleAnimation;
private Animation mScaleDownAnimation;
private Animation mAlphaStartAnimation;
private Animation mAlphaMaxAnimation;
private Animation mScaleDownToStartAnimation;
private float mSpinnerFinalOffset;
private boolean mNotify;
private int mCircleWidth;
private int mCircleHeight;
private boolean mUsingCustomStart;
private AnimationListener mRefreshListener = new AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
if (mRefreshing) {
mProgress.setAlpha(MAX_ALPHA);
mProgress.start();
if (mNotify) {
if (mListener != null) {
if (isTop) {
index = firstIndex;
mListener.onRefresh(index);
} else {
index++;
mListener.onLoad(index);
}
}
}
} else {
mProgress.stop();
mCircleView.setVisibility(View.GONE);
setColorViewAlpha(MAX_ALPHA);
if (mScale) {
setAnimationProgress(0);
} else {
setTargetOffsetTopAndBottom(mOriginalOffsetTop - mCurrentTargetOffsetTop, true);
}
}
mCurrentTargetOffsetTop = mCircleView.getTop();
}
};
private void setColorViewAlpha(int targetAlpha) {
mCircleView.getBackground().setAlpha(targetAlpha);
mProgress.setAlpha(targetAlpha);
}
public MySwipeRefreshLayout(Context context, AttributeSet attrs) {
super(context, attrs);
mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
mMediumAnimationDuration = getResources().getInteger(
android.R.integer.config_mediumAnimTime);
setWillNotDraw(false);
mDecelerateInterpolator = new DecelerateInterpolator(DECELERATE_INTERPOLATION_FACTOR);
final TypedArray a = context.obtainStyledAttributes(attrs, LAYOUT_ATTRS);
setEnabled(a.getBoolean(0, true));
a.recycle();
final TypedArray a2 = context.obtainStyledAttributes(attrs, R.styleable.SwipyRefreshLayout);
SwipyRefreshLayoutDirection direction
= SwipyRefreshLayoutDirection.getFromInt(a2.getInt(R.styleable.SwipyRefreshLayout_direction, 0));
if (direction != SwipyRefreshLayoutDirection.BOTH) {
mDirection = direction;
mBothDirection = false;
} else {
mDirection = SwipyRefreshLayoutDirection.TOP;
mBothDirection = true;
}
a2.recycle();
final DisplayMetrics metrics = getResources().getDisplayMetrics();
mCircleWidth = (int) (CIRCLE_DIAMETER * metrics.density);
mCircleHeight = (int) (CIRCLE_DIAMETER * metrics.density);
createProgressView();
ViewCompat.setChildrenDrawingOrderEnabled(this, true);
mSpinnerFinalOffset = DEFAULT_CIRCLE_TARGET * metrics.density;
mTotalDragDistance = mSpinnerFinalOffset;
//设置刷新动画颜色
setColorSchemeResources(android.R.color.holo_blue_light,
android.R.color.holo_red_light,
android.R.color.holo_orange_light,
android.R.color.holo_green_light);
}
private void createProgressView() {
mCircleView = new CircleImageView(getContext(), CIRCLE_BG_LIGHT, CIRCLE_DIAMETER / 2);
mProgress = new MaterialProgressDrawable(getContext(), this);
mProgress.setBackgroundColor(CIRCLE_BG_LIGHT);
mCircleView.setImageDrawable(mProgress);
mCircleView.setVisibility(View.GONE);
addView(mCircleView);
}
public void setOnRefreshListener(OnRefreshListener listener) {
mListener = listener;
}
private boolean isAlphaUsedForScale() {
return android.os.Build.VERSION.SDK_INT < 11;
}
public void setRefreshing(boolean refreshing) {
if (refreshing && mRefreshing != refreshing) {
mRefreshing = refreshing;
int endTarget = 0;
if (!mUsingCustomStart) {
endTarget = (int) (mSpinnerFinalOffset + mOriginalOffsetTop);
} else {
endTarget = (int) mSpinnerFinalOffset;
}
setTargetOffsetTopAndBottom(endTarget - mCurrentTargetOffsetTop,
true);
mNotify = false;
startScaleUpAnimation(mRefreshListener);
} else {
setRefreshing(refreshing, false);
}
}
private void startScaleUpAnimation(AnimationListener listener) {
mCircleView.setVisibility(View.VISIBLE);
if (android.os.Build.VERSION.SDK_INT >= 11) {
mProgress.setAlpha(MAX_ALPHA);
}
mScaleAnimation = new Animation() {
@Override
public void applyTransformation(float interpolatedTime, Transformation t) {
setAnimationProgress(interpolatedTime);
}
};
mScaleAnimation.setDuration(mMediumAnimationDuration);
if (listener != null) {
mCircleView.setAnimationListener(listener);
}
mCircleView.clearAnimation();
mCircleView.startAnimation(mScaleAnimation);
}
private void setAnimationProgress(float progress) {
if (isAlphaUsedForScale()) {
setColorViewAlpha((int) (progress * MAX_ALPHA));
} else {
ViewCompat.setScaleX(mCircleView, progress);
ViewCompat.setScaleY(mCircleView, progress);
}
}
private void setRefreshing(boolean refreshing, final boolean notify) {
if (mRefreshing != refreshing) {
mNotify = notify;
ensureTarget();
mRefreshing = refreshing;
if (mRefreshing) {
animateOffsetToCorrectPosition(mCurrentTargetOffsetTop, mRefreshListener);
} else {
startScaleDownAnimation(mRefreshListener);
}
}
}
private void startScaleDownAnimation(AnimationListener listener) {
mScaleDownAnimation = new Animation() {
@Override
public void applyTransformation(float interpolatedTime, Transformation t) {
setAnimationProgress(1 - interpolatedTime);
}
};
mScaleDownAnimation.setDuration(SCALE_DOWN_DURATION);
mCircleView.setAnimationListener(listener);
mCircleView.clearAnimation();
mCircleView.startAnimation(mScaleDownAnimation);
}
@SuppressLint("NewApi")
private void startProgressAlphaStartAnimation() {
mAlphaStartAnimation = startAlphaAnimation(mProgress.getAlpha(), STARTING_PROGRESS_ALPHA);
}
@SuppressLint("NewApi")
private void startProgressAlphaMaxAnimation() {
mAlphaMaxAnimation = startAlphaAnimation(mProgress.getAlpha(), MAX_ALPHA);
}
private Animation startAlphaAnimation(final int startingAlpha, final int endingAlpha) {
if (mScale && isAlphaUsedForScale()) {
return null;
}
Animation alpha = new Animation() {
@Override
public void applyTransformation(float interpolatedTime, Transformation t) {
mProgress
.setAlpha((int) (startingAlpha + ((endingAlpha - startingAlpha)
* interpolatedTime)));
}
};
alpha.setDuration(ALPHA_ANIMATION_DURATION);
mCircleView.setAnimationListener(null);
mCircleView.clearAnimation();
mCircleView.startAnimation(alpha);
return alpha;
}
public void setColorSchemeResources(int... colorResIds) {
final Resources res = getResources();
int[] colorRes = new int[colorResIds.length];
for (int i = 0; i < colorResIds.length; i++) {
colorRes[i] = res.getColor(colorResIds[i]);
}
setColorSchemeColors(colorRes);
}
public void setColorSchemeColors(int... colors) {
ensureTarget();
mProgress.setColorSchemeColors(colors);
}
private void ensureTarget() {
if (mTarget == null) {
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
if (!child.equals(mCircleView)) {
mTarget = child;
break;
}
}
}
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
final int width = getMeasuredWidth();
final int height = getMeasuredHeight();
if (getChildCount() == 0) {
return;
}
if (mTarget == null) {
ensureTarget();
}
if (mTarget == null) {
return;
}
final View child = mTarget;
final int childLeft = getPaddingLeft();
final int childTop = getPaddingTop();
final int childWidth = width - getPaddingLeft() - getPaddingRight();
final int childHeight = height - getPaddingTop() - getPaddingBottom();
child.layout(childLeft, childTop, childLeft + childWidth, childTop + childHeight);
int circleWidth = mCircleView.getMeasuredWidth();
int circleHeight = mCircleView.getMeasuredHeight();
mCircleView.layout((width / 2 - circleWidth / 2), mCurrentTargetOffsetTop,
(width / 2 + circleWidth / 2), mCurrentTargetOffsetTop + circleHeight);
}
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (mTarget == null) {
ensureTarget();
}
if (mTarget == null) {
return;
}
mTarget.measure(MeasureSpec.makeMeasureSpec(
getMeasuredWidth() - getPaddingLeft() - getPaddingRight(),
MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(
getMeasuredHeight() - getPaddingTop() - getPaddingBottom(), MeasureSpec.EXACTLY));
mCircleView.measure(MeasureSpec.makeMeasureSpec(mCircleWidth, MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(mCircleHeight, MeasureSpec.EXACTLY));
if (!mUsingCustomStart && !mOriginalOffsetCalculated) {
mOriginalOffsetCalculated = true;
switch (mDirection) {
case BOTTOM:
mCurrentTargetOffsetTop = mOriginalOffsetTop = getMeasuredHeight() - mCircleView.getMeasuredHeight();
break;
case TOP:
default:
mCurrentTargetOffsetTop = mOriginalOffsetTop = -mCircleView.getMeasuredHeight();
break;
}
}
mCircleViewIndex = -1;
for (int index = 0; index < getChildCount(); index++) {
if (getChildAt(index) == mCircleView) {
mCircleViewIndex = index;
break;
}
}
}
public boolean canChildScrollUp() {
if (android.os.Build.VERSION.SDK_INT < 14) {
if (mTarget instanceof AbsListView) {
final AbsListView absListView = (AbsListView) mTarget;
return absListView.getChildCount() > 0
&& (absListView.getFirstVisiblePosition() > 0 || absListView.getChildAt(0)
.getTop() < absListView.getPaddingTop());
} else {
return mTarget.getScrollY() > 0;
}
} else {
return ViewCompat.canScrollVertically(mTarget, -1);
}
}
public boolean canChildScrollDown() {
if (android.os.Build.VERSION.SDK_INT < 14) {
if (mTarget instanceof AbsListView) {
final AbsListView absListView = (AbsListView) mTarget;
try {
if (absListView.getCount() > 0) {
if (absListView.getLastVisiblePosition() + 1 == absListView.getCount()) {
int lastIndex = absListView.getLastVisiblePosition() - absListView.getFirstVisiblePosition();
return absListView.getChildAt(lastIndex).getBottom() == absListView.getPaddingBottom();
}
}
} catch (Exception e) {
e.printStackTrace();
}
return true;
} else {
return true;
}
} else {
return ViewCompat.canScrollVertically(mTarget, 1);
}
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
ensureTarget();
final int action = MotionEventCompat.getActionMasked(ev);
if (mReturningToStart && action == MotionEvent.ACTION_DOWN) {
mReturningToStart = false;
}
switch (mDirection) {
case BOTTOM:
if (!isEnabled() || mReturningToStart || (!mBothDirection && canChildScrollDown()) || mRefreshing) {
return false;
}
break;
case TOP:
default:
if (!isEnabled() || mReturningToStart || (!mBothDirection && canChildScrollUp()) || mRefreshing) {
return false;
}
break;
}
switch (action) {
case MotionEvent.ACTION_DOWN:
setTargetOffsetTopAndBottom(mOriginalOffsetTop - mCircleView.getTop(), true);
mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
mIsBeingDragged = false;
final float initialMotionY = getMotionEventY(ev, mActivePointerId);
if (initialMotionY == -1) {
return false;
}
mInitialMotionY = initialMotionY;
case MotionEvent.ACTION_MOVE:
if (mActivePointerId == INVALID_POINTER) {
return false;
}
final float y = getMotionEventY(ev, mActivePointerId);
if (y == -1) {
return false;
}
if (mBothDirection) {
if (y > mInitialMotionY) {
setRawDirection(SwipyRefreshLayoutDirection.TOP);
} else if (y < mInitialMotionY) {
setRawDirection(SwipyRefreshLayoutDirection.BOTTOM);
}
if ((mDirection == SwipyRefreshLayoutDirection.BOTTOM && canChildScrollDown())
|| (mDirection == SwipyRefreshLayoutDirection.TOP && canChildScrollUp())) {
return false;
}
}
float yDiff;
switch (mDirection) {
case BOTTOM:
yDiff = mInitialMotionY - y;
break;
case TOP:
default:
yDiff = y - mInitialMotionY;
break;
}
if (yDiff > mTouchSlop && !mIsBeingDragged) {
mIsBeingDragged = true;
mProgress.setAlpha(STARTING_PROGRESS_ALPHA);
}
break;
case MotionEventCompat.ACTION_POINTER_UP:
onSecondaryPointerUp(ev);
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
mIsBeingDragged = false;
mActivePointerId = INVALID_POINTER;
break;
}
return mIsBeingDragged;
}
private float getMotionEventY(MotionEvent ev, int activePointerId) {
final int index = MotionEventCompat.findPointerIndex(ev, activePointerId);
if (index < 0) {
return -1;
}
return MotionEventCompat.getY(ev, index);
}
private boolean isAnimationRunning(Animation animation) {
return animation != null && animation.hasStarted() && !animation.hasEnded();
}
@SuppressLint("NewApi")
@Override
public boolean onTouchEvent(MotionEvent ev) {
final int action = MotionEventCompat.getActionMasked(ev);
if (mReturningToStart && action == MotionEvent.ACTION_DOWN) {
mReturningToStart = false;
}
switch (mDirection) {
case BOTTOM:
if (!isEnabled() || mReturningToStart || canChildScrollDown() || mRefreshing) {
return false;
}
break;
case TOP:
default:
if (!isEnabled() || mReturningToStart || canChildScrollUp() || mRefreshing) {
return false;
}
break;
}
switch (action) {
case MotionEvent.ACTION_DOWN:
mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
mIsBeingDragged = false;
break;
case MotionEvent.ACTION_MOVE: {
final int pointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
if (pointerIndex < 0) {
return false;
}
final float y = MotionEventCompat.getY(ev, pointerIndex);
float overscrollTop;
switch (mDirection) {
case BOTTOM:
overscrollTop = (mInitialMotionY - y) * DRAG_RATE;
break;
case TOP:
default:
overscrollTop = (y - mInitialMotionY) * DRAG_RATE;
break;
}
if (mIsBeingDragged) {
mProgress.showArrow(true);
float originalDragPercent = overscrollTop / mTotalDragDistance;
if (originalDragPercent < 0) {
return false;
}
float dragPercent = Math.min(1f, Math.abs(originalDragPercent));
float adjustedPercent = (float) Math.max(dragPercent - .4, 0) * 5 / 3;
float extraOS = Math.abs(overscrollTop) - mTotalDragDistance;
float slingshotDist = mUsingCustomStart ? mSpinnerFinalOffset
- mOriginalOffsetTop : mSpinnerFinalOffset;
float tensionSlingshotPercent = Math.max(0,
Math.min(extraOS, slingshotDist * 2) / slingshotDist);
float tensionPercent = (float) ((tensionSlingshotPercent / 4) - Math.pow(
(tensionSlingshotPercent / 4), 2)) * 2f;
float extraMove = (slingshotDist) * tensionPercent * 2;
int targetY;
if (mDirection == SwipyRefreshLayoutDirection.TOP) {
targetY = mOriginalOffsetTop + (int) ((slingshotDist * dragPercent) + extraMove);
} else {
targetY = mOriginalOffsetTop - (int) ((slingshotDist * dragPercent) + extraMove);
}
if (mCircleView.getVisibility() != View.VISIBLE) {
mCircleView.setVisibility(View.VISIBLE);
}
if (!mScale) {
ViewCompat.setScaleX(mCircleView, 1f);
ViewCompat.setScaleY(mCircleView, 1f);
}
if (overscrollTop < mTotalDragDistance) {
if (mScale) {
setAnimationProgress(overscrollTop / mTotalDragDistance);
}
if (mProgress.getAlpha() > STARTING_PROGRESS_ALPHA
&& !isAnimationRunning(mAlphaStartAnimation)) {
startProgressAlphaStartAnimation();
}
float strokeStart = (float) (adjustedPercent * .8f);
mProgress.setStartEndTrim(0f, Math.min(MAX_PROGRESS_ANGLE, strokeStart));
mProgress.setArrowScale(Math.min(1f, adjustedPercent));
} else {
if (mProgress.getAlpha() < MAX_ALPHA
&& !isAnimationRunning(mAlphaMaxAnimation)) {
startProgressAlphaMaxAnimation();
}
}
float rotation = (-0.25f + .4f * adjustedPercent + tensionPercent * 2) * .5f;
mProgress.setProgressRotation(rotation);
setTargetOffsetTopAndBottom(targetY - mCurrentTargetOffsetTop, true);
}
break;
}
case MotionEventCompat.ACTION_POINTER_DOWN: {
final int index = MotionEventCompat.getActionIndex(ev);
mActivePointerId = MotionEventCompat.getPointerId(ev, index);
break;
}
case MotionEventCompat.ACTION_POINTER_UP:
onSecondaryPointerUp(ev);
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL: {
if (mActivePointerId == INVALID_POINTER) {
if (action == MotionEvent.ACTION_UP) {
}
return false;
}
final int pointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
final float y = MotionEventCompat.getY(ev, pointerIndex);
float overscrollTop;
switch (mDirection) {
case BOTTOM:
overscrollTop = (mInitialMotionY - y) * DRAG_RATE;
isTop = false;
break;
case TOP:
default:
overscrollTop = (y - mInitialMotionY) * DRAG_RATE;
isTop = true;
break;
}
mIsBeingDragged = false;
if (overscrollTop > mTotalDragDistance) {
setRefreshing(true, true);
} else {
mRefreshing = false;
mProgress.setStartEndTrim(0f, 0f);
AnimationListener listener = null;
if (!mScale) {
listener = new AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
if (!mScale) {
startScaleDownAnimation(null);
}
}
@Override
public void onAnimationRepeat(Animation animation) {
}
};
}
animateOffsetToStartPosition(mCurrentTargetOffsetTop, listener);
mProgress.showArrow(false);
}
mActivePointerId = INVALID_POINTER;
return false;
}
}
return true;
}
private void animateOffsetToCorrectPosition(int from, AnimationListener listener) {
mFrom = from;
mAnimateToCorrectPosition.reset();
mAnimateToCorrectPosition.setDuration(ANIMATE_TO_TRIGGER_DURATION);
mAnimateToCorrectPosition.setInterpolator(mDecelerateInterpolator);
if (listener != null) {
mCircleView.setAnimationListener(listener);
}
mCircleView.clearAnimation();
mCircleView.startAnimation(mAnimateToCorrectPosition);
}
private void animateOffsetToStartPosition(int from, AnimationListener listener) {
if (mScale) {
startScaleDownReturnToStartAnimation(from, listener);
} else {
mFrom = from;
mAnimateToStartPosition.reset();
mAnimateToStartPosition.setDuration(ANIMATE_TO_START_DURATION);
mAnimateToStartPosition.setInterpolator(mDecelerateInterpolator);
if (listener != null) {
mCircleView.setAnimationListener(listener);
}
mCircleView.clearAnimation();
mCircleView.startAnimation(mAnimateToStartPosition);
}
}
private final Animation mAnimateToCorrectPosition = new Animation() {
@Override
public void applyTransformation(float interpolatedTime, Transformation t) {
int targetTop = 0;
int endTarget = 0;
if (!mUsingCustomStart) {
switch (mDirection) {
case BOTTOM:
endTarget = getMeasuredHeight() - (int) (mSpinnerFinalOffset);
break;
case TOP:
default:
endTarget = (int) (mSpinnerFinalOffset - Math.abs(mOriginalOffsetTop));
break;
}
} else {
endTarget = (int) mSpinnerFinalOffset;
}
targetTop = (mFrom + (int) ((endTarget - mFrom) * interpolatedTime));
int offset = targetTop - mCircleView.getTop();
setTargetOffsetTopAndBottom(offset, false /* requires update */);
}
};
private void moveToStart(float interpolatedTime) {
int targetTop = 0;
targetTop = (mFrom + (int) ((mOriginalOffsetTop - mFrom) * interpolatedTime));
int offset = targetTop - mCircleView.getTop();
setTargetOffsetTopAndBottom(offset, false /* requires update */);
}
private final Animation mAnimateToStartPosition = new Animation() {
@Override
public void applyTransformation(float interpolatedTime, Transformation t) {
moveToStart(interpolatedTime);
}
};
@SuppressLint("NewApi")
private void startScaleDownReturnToStartAnimation(int from,
AnimationListener listener) {
mFrom = from;
if (isAlphaUsedForScale()) {
mStartingScale = mProgress.getAlpha();
} else {
mStartingScale = ViewCompat.getScaleX(mCircleView);
}
mScaleDownToStartAnimation = new Animation() {
@Override
public void applyTransformation(float interpolatedTime, Transformation t) {
float targetScale = (mStartingScale + (-mStartingScale * interpolatedTime));
setAnimationProgress(targetScale);
moveToStart(interpolatedTime);
}
};
mScaleDownToStartAnimation.setDuration(SCALE_DOWN_DURATION);
if (listener != null) {
mCircleView.setAnimationListener(listener);
}
mCircleView.clearAnimation();
mCircleView.startAnimation(mScaleDownToStartAnimation);
}
private void setTargetOffsetTopAndBottom(int offset, boolean requiresUpdate) {
mCircleView.bringToFront();
mCircleView.offsetTopAndBottom(offset);
mCurrentTargetOffsetTop = mCircleView.getTop();
if (requiresUpdate && android.os.Build.VERSION.SDK_INT < 11) {
invalidate();
}
}
private void onSecondaryPointerUp(MotionEvent ev) {
final int pointerIndex = MotionEventCompat.getActionIndex(ev);
final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex);
if (pointerId == mActivePointerId) {
final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex);
}
}
public interface OnRefreshListener {
void onRefresh(int index);
void onLoad(int index);
}
private void setRawDirection(SwipyRefreshLayoutDirection direction) {
if (mDirection == direction) {
return;
}
mDirection = direction;
switch (mDirection) {
case BOTTOM:
mCurrentTargetOffsetTop = mOriginalOffsetTop = getMeasuredHeight() - mCircleView.getMeasuredHeight();
break;
case TOP:
default:
mCurrentTargetOffsetTop = mOriginalOffsetTop = -mCircleView.getMeasuredHeight();
break;
}
}
}
2.其他类代码（辅助类）
class CircleImageView extends ImageView {
private static final int KEY_SHADOW_COLOR = 0x1E000000;
private static final int FILL_SHADOW_COLOR = 0x3D000000;
private static final float X_OFFSET = 0f;
private static final float Y_OFFSET = 1.75f;
private static final float SHADOW_RADIUS = 3.5f;
private static final int SHADOW_ELEVATION = 4;
private Animation.AnimationListener mListener;
private int mShadowRadius;
public CircleImageView(Context context, int color, final float radius) {
super(context);
final float density = getContext().getResources().getDisplayMetrics().density;
final int diameter = (int) (radius * density * 2);
final int shadowYOffset = (int) (density * Y_OFFSET);
final int shadowXOffset = (int) (density * X_OFFSET);
mShadowRadius = (int) (density * SHADOW_RADIUS);
ShapeDrawable circle;
if (elevationSupported()) {
circle = new ShapeDrawable(new OvalShape());
ViewCompat.setElevation(this, SHADOW_ELEVATION * density);
} else {
OvalShape oval = new OvalShadow(mShadowRadius, diameter);
circle = new ShapeDrawable(oval);
ViewCompat.setLayerType(this, ViewCompat.LAYER_TYPE_SOFTWARE,
circle.getPaint());
circle.getPaint().setShadowLayer(mShadowRadius, shadowXOffset,
shadowYOffset, KEY_SHADOW_COLOR);
final int padding = (int) mShadowRadius;
setPadding(padding, padding, padding, padding);
}
circle.getPaint().setColor(color);
setBackgroundDrawable(circle);
}
private boolean elevationSupported() {
return android.os.Build.VERSION.SDK_INT >= 21;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (!elevationSupported()) {
setMeasuredDimension(getMeasuredWidth() + mShadowRadius * 2,
getMeasuredHeight() + mShadowRadius * 2);
}
}
public void setAnimationListener(Animation.AnimationListener listener) {
mListener = listener;
}
@Override
public void onAnimationStart() {
super.onAnimationStart();
if (mListener != null) {
mListener.onAnimationStart(getAnimation());
}
}
@Override
public void onAnimationEnd() {
super.onAnimationEnd();
if (mListener != null) {
mListener.onAnimationEnd(getAnimation());
}
}
public void setBackgroundColor(int colorRes) {
if (getBackground() instanceof ShapeDrawable) {
final Resources res = getResources();
((ShapeDrawable) getBackground()).getPaint().setColor(
res.getColor(colorRes));
}
}
private class OvalShadow extends OvalShape {
private RadialGradient mRadialGradient;
private int mShadowRadius;
private Paint mShadowPaint;
private int mCircleDiameter;
public OvalShadow(int shadowRadius, int circleDiameter) {
super();
mShadowPaint = new Paint();
mShadowRadius = shadowRadius;
mCircleDiameter = circleDiameter;
mRadialGradient = new RadialGradient(mCircleDiameter / 2,
mCircleDiameter / 2, mShadowRadius, new int[] {
FILL_SHADOW_COLOR, Color.TRANSPARENT }, null,
Shader.TileMode.CLAMP);
mShadowPaint.setShader(mRadialGradient);
}
@Override
public void draw(Canvas canvas, Paint paint) {
final int viewWidth = CircleImageView.this.getWidth();
final int viewHeight = CircleImageView.this.getHeight();
canvas.drawCircle(viewWidth / 2, viewHeight / 2,
(mCircleDiameter / 2 + mShadowRadius), mShadowPaint);
canvas.drawCircle(viewWidth / 2, viewHeight / 2,
(mCircleDiameter / 2), paint);
}
}
}
class MaterialProgressDrawable extends Drawable implements Animatable {
private static final Interpolator LINEAR_INTERPOLATOR = new LinearInterpolator();
private static final Interpolator END_CURVE_INTERPOLATOR = new EndCurveInterpolator();
private static final Interpolator START_CURVE_INTERPOLATOR = new StartCurveInterpolator();
private static final Interpolator EASE_INTERPOLATOR = new AccelerateDecelerateInterpolator();
@Retention(RetentionPolicy.CLASS)
@IntDef({LARGE, DEFAULT})
public @interface ProgressDrawableSize {}
// Maps to ProgressBar.Large style
static final int LARGE = 0;
// Maps to ProgressBar default style
static final int DEFAULT = 1;
// Maps to ProgressBar default style
private static final int CIRCLE_DIAMETER = 40;
private static final float CENTER_RADIUS = 8.75f; //should add up to 10 when + stroke_width
private static final float STROKE_WIDTH = 2.5f;
// Maps to ProgressBar.Large style
private static final int CIRCLE_DIAMETER_LARGE = 56;
private static final float CENTER_RADIUS_LARGE = 12.5f;
private static final float STROKE_WIDTH_LARGE = 3f;
private final int[] COLORS = new int[] {
Color.BLACK
};
/** The duration of a single progress spin in milliseconds. */
private static final int ANIMATION_DURATION = 1000 * 80 / 60;
/** The number of points in the progress "star". */
private static final float NUM_POINTS = 5f;
/** The list of animators operating on this drawable. */
private final ArrayList<Animation> mAnimators = new ArrayList<Animation>();
/** The indicator ring, used to manage animation state. */
private final Ring mRing;
/** Canvas rotation in degrees. */
private float mRotation;
/** Layout info for the arrowhead in dp */
private static final int ARROW_WIDTH = 10;
private static final int ARROW_HEIGHT = 5;
private static final float ARROW_OFFSET_ANGLE = 5;
/** Layout info for the arrowhead for the large spinner in dp */
private static final int ARROW_WIDTH_LARGE = 12;
private static final int ARROW_HEIGHT_LARGE = 6;
private static final float MAX_PROGRESS_ARC = .8f;
private Resources mResources;
private View mParent;
private Animation mAnimation;
private float mRotationCount;
private double mWidth;
private double mHeight;
private Animation mFinishAnimation;
public MaterialProgressDrawable(Context context, View parent) {
mParent = parent;
mResources = context.getResources();
mRing = new Ring(mCallback);
mRing.setColors(COLORS);
updateSizes(DEFAULT);
setupAnimators();
}
private void setSizeParameters(double progressCircleWidth, double progressCircleHeight,
double centerRadius, double strokeWidth, float arrowWidth, float arrowHeight) {
final Ring ring = mRing;
final DisplayMetrics metrics = mResources.getDisplayMetrics();
final float screenDensity = metrics.density;
mWidth = progressCircleWidth * screenDensity;
mHeight = progressCircleHeight * screenDensity;
ring.setStrokeWidth((float) strokeWidth * screenDensity);
ring.setCenterRadius(centerRadius * screenDensity);
ring.setColorIndex(0);
ring.setArrowDimensions(arrowWidth * screenDensity, arrowHeight * screenDensity);
ring.setInsets((int) mWidth, (int) mHeight);
}
/**
* Set the overall size for the progress spinner. This updates the radius
* and stroke width of the ring.
*
*/
public void updateSizes(@ProgressDrawableSize int size) {
if (size == LARGE) {
setSizeParameters(CIRCLE_DIAMETER_LARGE, CIRCLE_DIAMETER_LARGE, CENTER_RADIUS_LARGE,
STROKE_WIDTH_LARGE, ARROW_WIDTH_LARGE, ARROW_HEIGHT_LARGE);
} else {
setSizeParameters(CIRCLE_DIAMETER, CIRCLE_DIAMETER, CENTER_RADIUS, STROKE_WIDTH,
ARROW_WIDTH, ARROW_HEIGHT);
}
}
/**
* @param show Set to true to display the arrowhead on the progress spinner.
*/
public void showArrow(boolean show) {
mRing.setShowArrow(show);
}
/**
* @param scale Set the scale of the arrowhead for the spinner.
*/
public void setArrowScale(float scale) {
mRing.setArrowScale(scale);
}
/**
* Set the start and end trim for the progress spinner arc.
*
* @param startAngle start angle
* @param endAngle end angle
*/
public void setStartEndTrim(float startAngle, float endAngle) {
mRing.setStartTrim(startAngle);
mRing.setEndTrim(endAngle);
}
/**
* Set the amount of rotation to apply to the progress spinner.
*
* @param rotation Rotation is from [0..1]
*/
public void setProgressRotation(float rotation) {
mRing.setRotation(rotation);
}
/**
* Update the background color of the circle image view.
*/
public void setBackgroundColor(int color) {
mRing.setBackgroundColor(color);
}
/**
* Set the colors used in the progress animation from color resources.
* The first color will also be the color of the bar that grows in response
* to a user swipe gesture.
*
* @param colors
*/
public void setColorSchemeColors(int... colors) {
mRing.setColors(colors);
mRing.setColorIndex(0);
}
@Override
public int getIntrinsicHeight() {
return (int) mHeight;
}
@Override
public int getIntrinsicWidth() {
return (int) mWidth;
}
@Override
public void draw(Canvas c) {
final Rect bounds = getBounds();
final int saveCount = c.save();
c.rotate(mRotation, bounds.exactCenterX(), bounds.exactCenterY());
mRing.draw(c, bounds);
c.restoreToCount(saveCount);
}
@Override
public void setAlpha(int alpha) {
mRing.setAlpha(alpha);
}
public int getAlpha() {
return mRing.getAlpha();
}
@Override
public void setColorFilter(ColorFilter colorFilter) {
mRing.setColorFilter(colorFilter);
}
@SuppressWarnings("unused")
void setRotation(float rotation) {
mRotation = rotation;
invalidateSelf();
}
@SuppressWarnings("unused")
private float getRotation() {
return mRotation;
}
@Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
@Override
public boolean isRunning() {
final ArrayList<Animation> animators = mAnimators;
final int N = animators.size();
for (int i = 0; i < N; i++) {
final Animation animator = animators.get(i);
if (animator.hasStarted() && !animator.hasEnded()) {
return true;
}
}
return false;
}
@Override
public void start() {
mAnimation.reset();
mRing.storeOriginals();
// Already showing some part of the ring
if (mRing.getEndTrim() != mRing.getStartTrim()) {
mParent.startAnimation(mFinishAnimation);
} else {
mRing.setColorIndex(0);
mRing.resetOriginals();
mParent.startAnimation(mAnimation);
}
}
@Override
public void stop() {
mParent.clearAnimation();
setRotation(0);
mRing.setShowArrow(false);
mRing.setColorIndex(0);
mRing.resetOriginals();
}
private void setupAnimators() {
final Ring ring = mRing;
final Animation finishRingAnimation = new Animation() {
public void applyTransformation(float interpolatedTime, Transformation t) {
// shrink back down and complete a full rotation before starting other circles
// Rotation goes between [0..1].
float targetRotation = (float) (Math.floor(ring.getStartingRotation()
/ MAX_PROGRESS_ARC) + 1f);
final float startTrim = ring.getStartingStartTrim()
+ (ring.getStartingEndTrim() - ring.getStartingStartTrim())
* interpolatedTime;
ring.setStartTrim(startTrim);
final float rotation = ring.getStartingRotation()
+ ((targetRotation - ring.getStartingRotation()) * interpolatedTime);
ring.setRotation(rotation);
ring.setArrowScale(1 - interpolatedTime);
}
};
finishRingAnimation.setInterpolator(EASE_INTERPOLATOR);
finishRingAnimation.setDuration(ANIMATION_DURATION/2);
finishRingAnimation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
ring.goToNextColor();
ring.storeOriginals();
ring.setShowArrow(false);
mParent.startAnimation(mAnimation);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
final Animation animation = new Animation() {
@Override
public void applyTransformation(float interpolatedTime, Transformation t) {
// The minProgressArc is calculated from 0 to create an angle that
// matches the stroke width.
final float minProgressArc = (float) Math.toRadians(ring.getStrokeWidth()
/ (2 * Math.PI * ring.getCenterRadius()));
final float startingEndTrim = ring.getStartingEndTrim();
final float startingTrim = ring.getStartingStartTrim();
final float startingRotation = ring.getStartingRotation();
// Offset the minProgressArc to where the endTrim is located.
final float minArc = MAX_PROGRESS_ARC - minProgressArc;
final float endTrim = startingEndTrim
+ (minArc * START_CURVE_INTERPOLATOR.getInterpolation(interpolatedTime));
ring.setEndTrim(endTrim);
final float startTrim = startingTrim
+ (MAX_PROGRESS_ARC * END_CURVE_INTERPOLATOR
.getInterpolation(interpolatedTime));
ring.setStartTrim(startTrim);
final float rotation = startingRotation + (0.25f * interpolatedTime);
ring.setRotation(rotation);
float groupRotation = ((720.0f / NUM_POINTS) * interpolatedTime)
+ (720.0f * (mRotationCount / NUM_POINTS));
setRotation(groupRotation);
}
};
animation.setRepeatCount(Animation.INFINITE);
animation.setRepeatMode(Animation.RESTART);
animation.setInterpolator(LINEAR_INTERPOLATOR);
animation.setDuration(ANIMATION_DURATION);
animation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
mRotationCount = 0;
}
@Override
public void onAnimationEnd(Animation animation) {
// do nothing
}
@Override
public void onAnimationRepeat(Animation animation) {
ring.storeOriginals();
ring.goToNextColor();
ring.setStartTrim(ring.getEndTrim());
mRotationCount = (mRotationCount + 1) % (NUM_POINTS);
}
});
mFinishAnimation = finishRingAnimation;
mAnimation = animation;
}
private final Callback mCallback = new Callback() {
@Override
public void invalidateDrawable(Drawable d) {
invalidateSelf();
}
@Override
public void scheduleDrawable(Drawable d, Runnable what, long when) {
scheduleSelf(what, when);
}
@Override
public void unscheduleDrawable(Drawable d, Runnable what) {
unscheduleSelf(what);
}
};
private static class Ring {
private final RectF mTempBounds = new RectF();
private final Paint mPaint = new Paint();
private final Paint mArrowPaint = new Paint();
private final Callback mCallback;
private float mStartTrim = 0.0f;
private float mEndTrim = 0.0f;
private float mRotation = 0.0f;
private float mStrokeWidth = 5.0f;
private float mStrokeInset = 2.5f;
private int[] mColors;
// mColorIndex represents the offset into the available mColors that the
// progress circle should currently display. As the progress circle is
// animating, the mColorIndex moves by one to the next available color.
private int mColorIndex;
private float mStartingStartTrim;
private float mStartingEndTrim;
private float mStartingRotation;
private boolean mShowArrow;
private Path mArrow;
private float mArrowScale;
private double mRingCenterRadius;
private int mArrowWidth;
private int mArrowHeight;
private int mAlpha;
private final Paint mCirclePaint = new Paint();
private int mBackgroundColor;
public Ring(Callback callback) {
mCallback = callback;
mPaint.setStrokeCap(Paint.Cap.SQUARE);
mPaint.setAntiAlias(true);
mPaint.setStyle(Style.STROKE);
mArrowPaint.setStyle(Style.FILL);
mArrowPaint.setAntiAlias(true);
}
public void setBackgroundColor(int color) {
mBackgroundColor = color;
}
/**
* Set the dimensions of the arrowhead.
*
* @param width Width of the hypotenuse of the arrow head
* @param height Height of the arrow point
*/
public void setArrowDimensions(float width, float height) {
mArrowWidth = (int) width;
mArrowHeight = (int) height;
}
/**
* Draw the progress spinner
*/
public void draw(Canvas c, Rect bounds) {
final RectF arcBounds = mTempBounds;
arcBounds.set(bounds);
arcBounds.inset(mStrokeInset, mStrokeInset);
final float startAngle = (mStartTrim + mRotation) * 360;
final float endAngle = (mEndTrim + mRotation) * 360;
float sweepAngle = endAngle - startAngle;
mPaint.setColor(mColors[mColorIndex]);
c.drawArc(arcBounds, startAngle, sweepAngle, false, mPaint);
drawTriangle(c, startAngle, sweepAngle, bounds);
if (mAlpha < 255) {
mCirclePaint.setColor(mBackgroundColor);
mCirclePaint.setAlpha(255 - mAlpha);
c.drawCircle(bounds.exactCenterX(), bounds.exactCenterY(), bounds.width() / 2,
mCirclePaint);
}
}
private void drawTriangle(Canvas c, float startAngle, float sweepAngle, Rect bounds) {
if (mShowArrow) {
if (mArrow == null) {
mArrow = new Path();
mArrow.setFillType(Path.FillType.EVEN_ODD);
} else {
mArrow.reset();
}
// Adjust the position of the triangle so that it is inset as
// much as the arc, but also centered on the arc.
float inset = (int) mStrokeInset / 2 * mArrowScale;
float x = (float) (mRingCenterRadius * Math.cos(0) + bounds.exactCenterX());
float y = (float) (mRingCenterRadius * Math.sin(0) + bounds.exactCenterY());
// Update the path each time. This works around an issue in SKIA
// where concatenating a rotation matrix to a scale matrix
// ignored a starting negative rotation. This appears to have
// been fixed as of API 21.
mArrow.moveTo(0, 0);
mArrow.lineTo(mArrowWidth * mArrowScale, 0);
mArrow.lineTo((mArrowWidth * mArrowScale / 2), (mArrowHeight
* mArrowScale));
mArrow.offset(x - inset, y);
mArrow.close();
// draw a triangle
mArrowPaint.setColor(mColors[mColorIndex]);
c.rotate(startAngle + sweepAngle - ARROW_OFFSET_ANGLE, bounds.exactCenterX(),
bounds.exactCenterY());
c.drawPath(mArrow, mArrowPaint);
}
}
/**
* Set the colors the progress spinner alternates between.
*
* @param colors Array of integers describing the colors. Must be non-<code>null</code>.
*/
public void setColors(@NonNull int[] colors) {
mColors = colors;
// if colors are reset, make sure to reset the color index as well
setColorIndex(0);
}
/**
* @param index Index into the color array of the color to display in
* the progress spinner.
*/
public void setColorIndex(int index) {
mColorIndex = index;
}
/**
* Proceed to the next available ring color. This will automatically
* wrap back to the beginning of colors.
*/
public void goToNextColor() {
mColorIndex = (mColorIndex + 1) % (mColors.length);
}
public void setColorFilter(ColorFilter filter) {
mPaint.setColorFilter(filter);
invalidateSelf();
}
/**
* @param alpha Set the alpha of the progress spinner and associated arrowhead.
*/
public void setAlpha(int alpha) {
mAlpha = alpha;
}
/**
* @return Current alpha of the progress spinner and arrowhead.
*/
public int getAlpha() {
return mAlpha;
}
/**
* @param strokeWidth Set the stroke width of the progress spinner in pixels.
*/
public void setStrokeWidth(float strokeWidth) {
mStrokeWidth = strokeWidth;
mPaint.setStrokeWidth(strokeWidth);
invalidateSelf();
}
@SuppressWarnings("unused")
public float getStrokeWidth() {
return mStrokeWidth;
}
@SuppressWarnings("unused")
public void setStartTrim(float startTrim) {
mStartTrim = startTrim;
invalidateSelf();
}
@SuppressWarnings("unused")
public float getStartTrim() {
return mStartTrim;
}
public float getStartingStartTrim() {
return mStartingStartTrim;
}
public float getStartingEndTrim() {
return mStartingEndTrim;
}
@SuppressWarnings("unused")
public void setEndTrim(float endTrim) {
mEndTrim = endTrim;
invalidateSelf();
}
@SuppressWarnings("unused")
public float getEndTrim() {
return mEndTrim;
}
@SuppressWarnings("unused")
public void setRotation(float rotation) {
mRotation = rotation;
invalidateSelf();
}
@SuppressWarnings("unused")
public float getRotation() {
return mRotation;
}
public void setInsets(int width, int height) {
final float minEdge = (float) Math.min(width, height);
float insets;
if (mRingCenterRadius <= 0 || minEdge < 0) {
insets = (float) Math.ceil(mStrokeWidth / 2.0f);
} else {
insets = (float) (minEdge / 2.0f - mRingCenterRadius);
}
mStrokeInset = insets;
}
@SuppressWarnings("unused")
public float getInsets() {
return mStrokeInset;
}
/**
* @param centerRadius Inner radius in px of the circle the progress
* spinner arc traces.
*/
public void setCenterRadius(double centerRadius) {
mRingCenterRadius = centerRadius;
}
public double getCenterRadius() {
return mRingCenterRadius;
}
/**
* @param show Set to true to show the arrow head on the progress spinner.
*/
public void setShowArrow(boolean show) {
if (mShowArrow != show) {
mShowArrow = show;
invalidateSelf();
}
}
/**
* @param scale Set the scale of the arrowhead for the spinner.
*/
public void setArrowScale(float scale) {
if (scale != mArrowScale) {
mArrowScale = scale;
invalidateSelf();
}
}
/**
* @return The amount the progress spinner is currently rotated, between [0..1].
*/
public float getStartingRotation() {
return mStartingRotation;
}
/**
* If the start / end trim are offset to begin with, store them so that
* animation starts from that offset.
*/
public void storeOriginals() {
mStartingStartTrim = mStartTrim;
mStartingEndTrim = mEndTrim;
mStartingRotation = mRotation;
}
/**
* Reset the progress spinner to default rotation, start and end angles.
*/
public void resetOriginals() {
mStartingStartTrim = 0;
mStartingEndTrim = 0;
mStartingRotation = 0;
setStartTrim(0);
setEndTrim(0);
setRotation(0);
}
private void invalidateSelf() {
mCallback.invalidateDrawable(null);
}
}
/**
* Squishes the interpolation curve into the second half of the animation.
*/
private static class EndCurveInterpolator extends AccelerateDecelerateInterpolator {
@Override
public float getInterpolation(float input) {
return super.getInterpolation(Math.max(0, (input - 0.5f) * 2.0f));
}
}
/**
* Squishes the interpolation curve into the first half of the animation.
*/
private static class StartCurveInterpolator extends AccelerateDecelerateInterpolator {
@Override
public float getInterpolation(float input) {
return super.getInterpolation(Math.min(1, input * 2.0f));
}
}
}
public enum SwipyRefreshLayoutDirection {
TOP(0), // 只有下拉刷新
BOTTOM(1), // 只有加载更多
BOTH(2);// 全都有
private int mValue;
SwipyRefreshLayoutDirection(int value) {
this.mValue = value;
}
public static SwipyRefreshLayoutDirection getFromInt(int value) {
for (SwipyRefreshLayoutDirection direction : SwipyRefreshLayoutDirection
.values()) {
if (direction.mValue == value) {
return direction;
}
}
return BOTH;
}
}